./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:30:10,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:30:10,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:30:10,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:30:10,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:30:10,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:30:10,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:30:10,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:30:10,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:30:10,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:30:10,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:30:10,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:30:10,659 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:30:10,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:30:10,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:30:10,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:30:10,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:30:10,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:30:10,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:30:10,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:30:10,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:30:10,680 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:30:10,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:30:10,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:30:10,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:30:10,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:30:10,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:30:10,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:30:10,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:30:10,693 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:30:10,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:30:10,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:30:10,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:30:10,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:30:10,703 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:30:10,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:30:10,704 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:30:10,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:30:10,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:30:10,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:30:10,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:30:10,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:30:10,749 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:30:10,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:30:10,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:30:10,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:30:10,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:30:10,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:30:10,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:30:10,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:30:10,751 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:30:10,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:30:10,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:30:10,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:30:10,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:30:10,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:30:10,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:30:10,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:30:10,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:30:10,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:30:10,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:30:10,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:30:10,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:30:10,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:30:10,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:30:10,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:30:10,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:30:10,756 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:30:10,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:30:10,757 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:30:10,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:30:10,757 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:30:10,757 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:30:11,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:30:11,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:30:11,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:30:11,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:30:11,109 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:30:11,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 14:30:12,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:30:12,576 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:30:12,577 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-09-01 14:30:12,583 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b2a8af3/73389c767fae48f0836300d9788c3c6b/FLAG4770adf48 [2023-09-01 14:30:12,947 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66b2a8af3/73389c767fae48f0836300d9788c3c6b [2023-09-01 14:30:12,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:30:12,950 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:30:12,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:30:12,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:30:12,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:30:12,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:12" (1/1) ... [2023-09-01 14:30:12,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784e33f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:12, skipping insertion in model container [2023-09-01 14:30:12,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:30:12" (1/1) ... [2023-09-01 14:30:12,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:30:12,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:30:13,164 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 14:30:13,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:30:13,190 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:30:13,227 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2023-09-01 14:30:13,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:30:13,246 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:30:13,247 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:30:13,264 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:30:13,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13 WrapperNode [2023-09-01 14:30:13,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:30:13,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:30:13,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:30:13,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:30:13,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,319 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 158 [2023-09-01 14:30:13,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:30:13,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:30:13,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:30:13,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:30:13,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,373 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:30:13,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:30:13,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:30:13,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:30:13,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (1/1) ... [2023-09-01 14:30:13,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:30:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:13,410 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) [2023-09-01 14:30:13,432 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 [2023-09-01 14:30:13,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:30:13,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:30:13,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:30:13,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:30:13,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:30:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:30:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:30:13,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:30:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:30:13,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:30:13,451 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:30:13,562 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:30:13,564 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:30:13,854 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:30:13,975 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:30:13,975 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-09-01 14:30:13,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:13 BoogieIcfgContainer [2023-09-01 14:30:13,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:30:13,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:30:13,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:30:13,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:30:13,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:30:12" (1/3) ... [2023-09-01 14:30:13,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ab909e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:13, skipping insertion in model container [2023-09-01 14:30:13,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:30:13" (2/3) ... [2023-09-01 14:30:13,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39ab909e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:30:13, skipping insertion in model container [2023-09-01 14:30:13,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:30:13" (3/3) ... [2023-09-01 14:30:13,986 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-09-01 14:30:13,993 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:30:14,003 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:30:14,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:30:14,003 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:30:14,047 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-09-01 14:30:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-09-01 14:30:14,139 INFO L130 PetriNetUnfolder]: 11/126 cut-off events. [2023-09-01 14:30:14,140 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:30:14,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-09-01 14:30:14,144 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-09-01 14:30:14,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-09-01 14:30:14,151 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:30:14,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-09-01 14:30:14,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-09-01 14:30:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-09-01 14:30:14,197 INFO L130 PetriNetUnfolder]: 11/118 cut-off events. [2023-09-01 14:30:14,197 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:30:14,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-09-01 14:30:14,199 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2023-09-01 14:30:18,364 INFO L134 LiptonReduction]: Checked pairs total: 676 [2023-09-01 14:30:18,364 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-09-01 14:30:18,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:30:18,382 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38190b99, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:30:18,382 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-09-01 14:30:18,388 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-09-01 14:30:18,389 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-09-01 14:30:18,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:18,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:18,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:18,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:18,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1821199336, now seen corresponding path program 1 times [2023-09-01 14:30:18,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:18,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136746850] [2023-09-01 14:30:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:18,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136746850] [2023-09-01 14:30:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136746850] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:30:18,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:30:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:30:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628500054] [2023-09-01 14:30:18,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:30:18,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:30:18,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:30:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:30:18,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 249 [2023-09-01 14:30:18,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:18,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:18,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 249 [2023-09-01 14:30:18,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:18,991 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2023-09-01 14:30:18,992 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-09-01 14:30:18,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 18 based on Foata normal form. 4/63 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-09-01 14:30:18,997 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2023-09-01 14:30:18,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-09-01 14:30:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:30:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:30:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 449 transitions. [2023-09-01 14:30:19,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4508032128514056 [2023-09-01 14:30:19,023 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 449 transitions. [2023-09-01 14:30:19,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 449 transitions. [2023-09-01 14:30:19,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:19,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 449 transitions. [2023-09-01 14:30:19,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 112.25) internal successors, (449), 4 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,041 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,042 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 449 transitions. [2023-09-01 14:30:19,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-09-01 14:30:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-09-01 14:30:19,048 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-09-01 14:30:19,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-09-01 14:30:19,053 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-09-01 14:30:19,053 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-09-01 14:30:19,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:19,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:19,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:30:19,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:19,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash -885649661, now seen corresponding path program 1 times [2023-09-01 14:30:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682977456] [2023-09-01 14:30:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:19,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:19,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682977456] [2023-09-01 14:30:19,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682977456] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:30:19,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:30:19,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:30:19,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078089094] [2023-09-01 14:30:19,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:30:19,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 14:30:19,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:19,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 14:30:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-09-01 14:30:19,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 249 [2023-09-01 14:30:19,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:19,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 249 [2023-09-01 14:30:19,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:19,666 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2023-09-01 14:30:19,666 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-09-01 14:30:19,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 422 event pairs, 15 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2023-09-01 14:30:19,668 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2023-09-01 14:30:19,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2023-09-01 14:30:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:30:19,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:30:19,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 672 transitions. [2023-09-01 14:30:19,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497991967871486 [2023-09-01 14:30:19,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 672 transitions. [2023-09-01 14:30:19,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 672 transitions. [2023-09-01 14:30:19,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:19,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 672 transitions. [2023-09-01 14:30:19,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,677 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,677 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 672 transitions. [2023-09-01 14:30:19,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2023-09-01 14:30:19,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 14:30:19,679 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2023-09-01 14:30:19,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-09-01 14:30:19,680 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-09-01 14:30:19,680 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2023-09-01 14:30:19,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.0) internal successors, (749), 7 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:19,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:19,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:30:19,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:19,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:19,682 INFO L85 PathProgramCache]: Analyzing trace with hash 919629356, now seen corresponding path program 1 times [2023-09-01 14:30:19,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:19,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098811113] [2023-09-01 14:30:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:19,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:19,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:19,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098811113] [2023-09-01 14:30:19,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098811113] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:30:19,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:30:19,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:30:19,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800517365] [2023-09-01 14:30:19,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:30:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:30:19,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:19,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:30:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:30:19,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 249 [2023-09-01 14:30:19,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:19,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 249 [2023-09-01 14:30:19,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:19,889 INFO L130 PetriNetUnfolder]: 87/181 cut-off events. [2023-09-01 14:30:19,889 INFO L131 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2023-09-01 14:30:19,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 640 event pairs, 12 based on Foata normal form. 17/170 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2023-09-01 14:30:19,894 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-09-01 14:30:19,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2023-09-01 14:30:19,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:30:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:30:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-09-01 14:30:19,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708835341365462 [2023-09-01 14:30:19,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-09-01 14:30:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-09-01 14:30:19,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:19,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-09-01 14:30:19,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,900 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,901 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 469 transitions. [2023-09-01 14:30:19,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2023-09-01 14:30:19,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 14:30:19,903 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-09-01 14:30:19,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-09-01 14:30:19,904 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-09-01 14:30:19,904 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-09-01 14:30:19,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:19,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:19,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:19,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:30:19,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:19,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:19,905 INFO L85 PathProgramCache]: Analyzing trace with hash -86135109, now seen corresponding path program 1 times [2023-09-01 14:30:19,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:19,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343382011] [2023-09-01 14:30:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:19,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:20,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343382011] [2023-09-01 14:30:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343382011] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:20,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406786187] [2023-09-01 14:30:20,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:20,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:20,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:20,017 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) [2023-09-01 14:30:20,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:30:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:20,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:30:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:20,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406786187] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:20,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-09-01 14:30:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021818305] [2023-09-01 14:30:20,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-09-01 14:30:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-09-01 14:30:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-09-01 14:30:20,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-09-01 14:30:20,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:20,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:20,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-09-01 14:30:20,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:20,610 INFO L130 PetriNetUnfolder]: 82/182 cut-off events. [2023-09-01 14:30:20,610 INFO L131 PetriNetUnfolder]: For 327/332 co-relation queries the response was YES. [2023-09-01 14:30:20,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 327/332 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2023-09-01 14:30:20,614 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-09-01 14:30:20,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2023-09-01 14:30:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:30:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:30:20,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2023-09-01 14:30:20,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42971887550200805 [2023-09-01 14:30:20,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2023-09-01 14:30:20,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2023-09-01 14:30:20,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:20,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2023-09-01 14:30:20,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:20,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:20,627 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:20,627 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 642 transitions. [2023-09-01 14:30:20,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2023-09-01 14:30:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-09-01 14:30:20,632 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2023-09-01 14:30:20,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-09-01 14:30:20,633 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-09-01 14:30:20,634 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2023-09-01 14:30:20,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:20,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:20,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:20,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-09-01 14:30:20,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:20,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:20,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -984099166, now seen corresponding path program 2 times [2023-09-01 14:30:20,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:20,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355245545] [2023-09-01 14:30:20,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:20,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:21,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:21,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355245545] [2023-09-01 14:30:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355245545] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:21,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615351224] [2023-09-01 14:30:21,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:30:21,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:21,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:21,457 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) [2023-09-01 14:30:21,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:30:21,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:30:21,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:21,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:30:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:21,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:30:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:21,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:22,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:22,023 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 37 [2023-09-01 14:30:22,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:30:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615351224] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:22,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:22,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 14:30:22,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976610623] [2023-09-01 14:30:22,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:22,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:30:22,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:30:22,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:30:22,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-09-01 14:30:22,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:22,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:22,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-09-01 14:30:22,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:24,838 INFO L130 PetriNetUnfolder]: 301/624 cut-off events. [2023-09-01 14:30:24,838 INFO L131 PetriNetUnfolder]: For 1182/1190 co-relation queries the response was YES. [2023-09-01 14:30:24,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 624 events. 301/624 cut-off events. For 1182/1190 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3121 event pairs, 20 based on Foata normal form. 54/569 useless extension candidates. Maximal degree in co-relation 2380. Up to 255 conditions per place. [2023-09-01 14:30:24,843 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 108 selfloop transitions, 68 changer transitions 1/179 dead transitions. [2023-09-01 14:30:24,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 179 transitions, 1278 flow [2023-09-01 14:30:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:30:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:30:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2492 transitions. [2023-09-01 14:30:24,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492431263515603 [2023-09-01 14:30:24,851 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2492 transitions. [2023-09-01 14:30:24,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2492 transitions. [2023-09-01 14:30:24,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:24,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2492 transitions. [2023-09-01 14:30:24,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.84615384615384) internal successors, (2492), 26 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:24,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:24,879 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:24,880 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 26 states and 2492 transitions. [2023-09-01 14:30:24,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 179 transitions, 1278 flow [2023-09-01 14:30:24,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 179 transitions, 1228 flow, removed 23 selfloop flow, removed 4 redundant places. [2023-09-01 14:30:24,890 INFO L231 Difference]: Finished difference. Result has 62 places, 106 transitions, 944 flow [2023-09-01 14:30:24,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=944, PETRI_PLACES=62, PETRI_TRANSITIONS=106} [2023-09-01 14:30:24,893 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 41 predicate places. [2023-09-01 14:30:24,893 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 106 transitions, 944 flow [2023-09-01 14:30:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.6086956521739) internal successors, (2107), 23 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:24,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:24,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:24,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-09-01 14:30:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:25,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:25,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1199743108, now seen corresponding path program 3 times [2023-09-01 14:30:25,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:25,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343078126] [2023-09-01 14:30:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:25,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343078126] [2023-09-01 14:30:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343078126] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016405251] [2023-09-01 14:30:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:30:25,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:25,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:25,681 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) [2023-09-01 14:30:25,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:30:25,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:30:25,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:25,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:30:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:26,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:26,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:30:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:26,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:26,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:26,306 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 37 [2023-09-01 14:30:26,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:30:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:26,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016405251] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:26,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:26,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-09-01 14:30:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533199777] [2023-09-01 14:30:26,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:30:26,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:30:26,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:30:27,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 249 [2023-09-01 14:30:27,111 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 106 transitions, 944 flow. Second operand has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:27,111 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:27,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 249 [2023-09-01 14:30:27,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:28,103 INFO L130 PetriNetUnfolder]: 325/648 cut-off events. [2023-09-01 14:30:28,103 INFO L131 PetriNetUnfolder]: For 1774/1777 co-relation queries the response was YES. [2023-09-01 14:30:28,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3030 conditions, 648 events. 325/648 cut-off events. For 1774/1777 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3087 event pairs, 40 based on Foata normal form. 21/564 useless extension candidates. Maximal degree in co-relation 2333. Up to 285 conditions per place. [2023-09-01 14:30:28,108 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 103 selfloop transitions, 52 changer transitions 0/157 dead transitions. [2023-09-01 14:30:28,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 157 transitions, 1511 flow [2023-09-01 14:30:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-09-01 14:30:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-09-01 14:30:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1712 transitions. [2023-09-01 14:30:28,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819723337795627 [2023-09-01 14:30:28,114 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1712 transitions. [2023-09-01 14:30:28,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1712 transitions. [2023-09-01 14:30:28,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:28,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1712 transitions. [2023-09-01 14:30:28,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.11111111111111) internal successors, (1712), 18 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:28,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:28,125 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:28,125 INFO L175 Difference]: Start difference. First operand has 62 places, 106 transitions, 944 flow. Second operand 18 states and 1712 transitions. [2023-09-01 14:30:28,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 157 transitions, 1511 flow [2023-09-01 14:30:28,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 157 transitions, 1205 flow, removed 149 selfloop flow, removed 5 redundant places. [2023-09-01 14:30:28,137 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 900 flow [2023-09-01 14:30:28,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-09-01 14:30:28,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-09-01 14:30:28,138 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 900 flow [2023-09-01 14:30:28,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.78260869565217) internal successors, (2111), 23 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:28,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:28,139 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:28,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:28,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:28,344 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:28,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:28,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1201797661, now seen corresponding path program 1 times [2023-09-01 14:30:28,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:28,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065092967] [2023-09-01 14:30:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:28,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065092967] [2023-09-01 14:30:28,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065092967] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:28,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970224974] [2023-09-01 14:30:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:28,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:28,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:28,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:28,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:30:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2023-09-01 14:30:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:29,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:29,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:29,264 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 29 [2023-09-01 14:30:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:29,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970224974] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:29,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:29,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-09-01 14:30:29,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021862202] [2023-09-01 14:30:29,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:30:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:30:29,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:30:29,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:30:29,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 900 flow. Second operand has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 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) [2023-09-01 14:30:29,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:29,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:30:29,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:30,534 INFO L130 PetriNetUnfolder]: 365/730 cut-off events. [2023-09-01 14:30:30,534 INFO L131 PetriNetUnfolder]: For 1900/1900 co-relation queries the response was YES. [2023-09-01 14:30:30,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3203 conditions, 730 events. 365/730 cut-off events. For 1900/1900 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3606 event pairs, 57 based on Foata normal form. 10/680 useless extension candidates. Maximal degree in co-relation 2904. Up to 599 conditions per place. [2023-09-01 14:30:30,541 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 125 selfloop transitions, 30 changer transitions 4/160 dead transitions. [2023-09-01 14:30:30,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 160 transitions, 1458 flow [2023-09-01 14:30:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 14:30:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 14:30:30,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1396 transitions. [2023-09-01 14:30:30,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37376171352074966 [2023-09-01 14:30:30,546 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1396 transitions. [2023-09-01 14:30:30,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1396 transitions. [2023-09-01 14:30:30,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:30,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1396 transitions. [2023-09-01 14:30:30,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.06666666666666) internal successors, (1396), 15 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:30,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:30,556 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:30,556 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 900 flow. Second operand 15 states and 1396 transitions. [2023-09-01 14:30:30,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 160 transitions, 1458 flow [2023-09-01 14:30:30,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 160 transitions, 1409 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-09-01 14:30:30,567 INFO L231 Difference]: Finished difference. Result has 90 places, 125 transitions, 1098 flow [2023-09-01 14:30:30,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1098, PETRI_PLACES=90, PETRI_TRANSITIONS=125} [2023-09-01 14:30:30,568 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 69 predicate places. [2023-09-01 14:30:30,568 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 125 transitions, 1098 flow [2023-09-01 14:30:30,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.26315789473684) internal successors, (1715), 19 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) [2023-09-01 14:30:30,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:30,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:30,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:30,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:30,775 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:30,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:30,775 INFO L85 PathProgramCache]: Analyzing trace with hash 232462075, now seen corresponding path program 4 times [2023-09-01 14:30:30,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:30,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014168533] [2023-09-01 14:30:30,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:30,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:31,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014168533] [2023-09-01 14:30:31,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014168533] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:31,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964761131] [2023-09-01 14:30:31,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:30:31,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:31,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:31,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:31,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 14:30:31,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:30:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 14:30:31,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:31,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:30:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:31,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:31,995 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-09-01 14:30:32,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:32,008 INFO L350 Elim1Store]: Elim1 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 45 treesize of output 37 [2023-09-01 14:30:32,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-09-01 14:30:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:30:32,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964761131] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:32,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:30:32,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 18 [2023-09-01 14:30:32,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084460884] [2023-09-01 14:30:32,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:30:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-09-01 14:30:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:32,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-09-01 14:30:32,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=266, Unknown=1, NotChecked=32, Total=342 [2023-09-01 14:30:32,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-09-01 14:30:32,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 125 transitions, 1098 flow. Second operand has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:32,130 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:32,130 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-09-01 14:30:32,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:32,161 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (not (= (select (select |c_#memory_int| c_~q~0.base) .cse0) 0)) (forall ((v_ArrVal_216 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_216) c_~q~0.base) .cse0) 0))))) is different from false [2023-09-01 14:30:32,290 INFO L130 PetriNetUnfolder]: 398/774 cut-off events. [2023-09-01 14:30:32,291 INFO L131 PetriNetUnfolder]: For 3282/3292 co-relation queries the response was YES. [2023-09-01 14:30:32,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3753 conditions, 774 events. 398/774 cut-off events. For 3282/3292 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3807 event pairs, 56 based on Foata normal form. 12/734 useless extension candidates. Maximal degree in co-relation 3452. Up to 622 conditions per place. [2023-09-01 14:30:32,298 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 129 selfloop transitions, 31 changer transitions 0/163 dead transitions. [2023-09-01 14:30:32,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 163 transitions, 1806 flow [2023-09-01 14:30:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:30:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:30:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 493 transitions. [2023-09-01 14:30:32,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39598393574297186 [2023-09-01 14:30:32,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 493 transitions. [2023-09-01 14:30:32,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 493 transitions. [2023-09-01 14:30:32,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:32,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 493 transitions. [2023-09-01 14:30:32,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:32,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:32,305 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:32,305 INFO L175 Difference]: Start difference. First operand has 90 places, 125 transitions, 1098 flow. Second operand 5 states and 493 transitions. [2023-09-01 14:30:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 163 transitions, 1806 flow [2023-09-01 14:30:32,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 163 transitions, 1712 flow, removed 21 selfloop flow, removed 7 redundant places. [2023-09-01 14:30:32,323 INFO L231 Difference]: Finished difference. Result has 87 places, 140 transitions, 1365 flow [2023-09-01 14:30:32,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=996, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1365, PETRI_PLACES=87, PETRI_TRANSITIONS=140} [2023-09-01 14:30:32,325 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 66 predicate places. [2023-09-01 14:30:32,325 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 140 transitions, 1365 flow [2023-09-01 14:30:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:32,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:32,326 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:32,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:32,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:32,540 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:32,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1314770777, now seen corresponding path program 2 times [2023-09-01 14:30:32,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:32,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180393290] [2023-09-01 14:30:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180393290] [2023-09-01 14:30:33,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180393290] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521230421] [2023-09-01 14:30:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:30:33,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:33,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:33,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 14:30:33,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:30:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:33,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2023-09-01 14:30:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:33,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:33,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:33,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2023-09-01 14:30:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521230421] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:33,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 18 [2023-09-01 14:30:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55478124] [2023-09-01 14:30:33,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:33,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-09-01 14:30:33,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-09-01 14:30:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-09-01 14:30:34,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:30:34,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 140 transitions, 1365 flow. Second operand has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:34,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:34,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:30:34,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:34,593 INFO L130 PetriNetUnfolder]: 421/828 cut-off events. [2023-09-01 14:30:34,594 INFO L131 PetriNetUnfolder]: For 3957/3957 co-relation queries the response was YES. [2023-09-01 14:30:34,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4248 conditions, 828 events. 421/828 cut-off events. For 3957/3957 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4207 event pairs, 61 based on Foata normal form. 2/779 useless extension candidates. Maximal degree in co-relation 3921. Up to 616 conditions per place. [2023-09-01 14:30:34,602 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 129 selfloop transitions, 41 changer transitions 17/188 dead transitions. [2023-09-01 14:30:34,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 188 transitions, 2020 flow [2023-09-01 14:30:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-09-01 14:30:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-09-01 14:30:34,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1401 transitions. [2023-09-01 14:30:34,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3751004016064257 [2023-09-01 14:30:34,606 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1401 transitions. [2023-09-01 14:30:34,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1401 transitions. [2023-09-01 14:30:34,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:34,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1401 transitions. [2023-09-01 14:30:34,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.4) internal successors, (1401), 15 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:34,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:34,615 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:34,615 INFO L175 Difference]: Start difference. First operand has 87 places, 140 transitions, 1365 flow. Second operand 15 states and 1401 transitions. [2023-09-01 14:30:34,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 188 transitions, 2020 flow [2023-09-01 14:30:34,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 188 transitions, 2008 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 14:30:34,632 INFO L231 Difference]: Finished difference. Result has 103 places, 142 transitions, 1489 flow [2023-09-01 14:30:34,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1489, PETRI_PLACES=103, PETRI_TRANSITIONS=142} [2023-09-01 14:30:34,633 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 82 predicate places. [2023-09-01 14:30:34,633 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 142 transitions, 1489 flow [2023-09-01 14:30:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 90.25) internal successors, (1805), 20 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:34,634 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:34,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:34,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:34,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -783438641, now seen corresponding path program 3 times [2023-09-01 14:30:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98512395] [2023-09-01 14:30:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:34,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98512395] [2023-09-01 14:30:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98512395] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828711017] [2023-09-01 14:30:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:30:35,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:35,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:35,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:35,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 14:30:35,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:30:35,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 58 conjunts are in the unsatisfiable core [2023-09-01 14:30:35,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:35,615 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 14:30:35,661 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 14:30:35,714 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-09-01 14:30:35,963 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:30:35,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:35,965 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:36,272 WARN L839 $PredicateComparison]: unable to prove that (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)) 2)) (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) c_~q~0.base) .cse0)))))) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-09-01 14:30:36,330 WARN L839 $PredicateComparison]: unable to prove that (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~q_back~0 0) (<= c_~n~0 (+ c_~q_back~0 1)) (let ((.cse1 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)) 2)) (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse3 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)))) (not (= (select (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1)))))))) is different from false [2023-09-01 14:30:36,387 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) (< c_~q_back~0 0) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n~0 (+ c_~q_back~0 1))) is different from false [2023-09-01 14:30:36,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:36,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 60 [2023-09-01 14:30:36,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:36,428 INFO L350 Elim1Store]: Elim1 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 108 treesize of output 100 [2023-09-01 14:30:36,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-09-01 14:30:36,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:36,447 INFO L350 Elim1Store]: Elim1 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 55 treesize of output 51 [2023-09-01 14:30:36,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:36,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 60 [2023-09-01 14:30:36,546 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:30:36,552 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:30:36,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-09-01 14:30:36,561 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:30:36,562 INFO L350 Elim1Store]: Elim1 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 40 treesize of output 32 [2023-09-01 14:30:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-09-01 14:30:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828711017] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:36,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-09-01 14:30:36,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174379838] [2023-09-01 14:30:36,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:36,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:30:36,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:36,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:30:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=497, Unknown=21, NotChecked=144, Total=756 [2023-09-01 14:30:36,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-09-01 14:30:36,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 142 transitions, 1489 flow. Second operand has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:36,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:36,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-09-01 14:30:36,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:36,972 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (< c_~q_back~0 0)) (.cse7 (<= c_~n~0 (+ c_~q_back~0 1))) (.cse2 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (or (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (not (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1)) (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2))))) (forall ((v_ArrVal_287 Int) (v_ArrVal_289 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_287)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))) .cse6 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse7) (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse6 .cse7 (and (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< (+ c_~s~0 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)) 2)) (not (= (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))) (forall ((v_ArrVal_289 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_289))) (or (forall ((v_ArrVal_290 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_290) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))) (not (= (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1) 1))))))))) is different from false [2023-09-01 14:30:42,168 INFO L130 PetriNetUnfolder]: 544/1062 cut-off events. [2023-09-01 14:30:42,168 INFO L131 PetriNetUnfolder]: For 5566/5566 co-relation queries the response was YES. [2023-09-01 14:30:42,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5446 conditions, 1062 events. 544/1062 cut-off events. For 5566/5566 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5761 event pairs, 75 based on Foata normal form. 3/999 useless extension candidates. Maximal degree in co-relation 5343. Up to 757 conditions per place. [2023-09-01 14:30:42,178 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 158 selfloop transitions, 83 changer transitions 8/250 dead transitions. [2023-09-01 14:30:42,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 250 transitions, 2814 flow [2023-09-01 14:30:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-09-01 14:30:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-09-01 14:30:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1631 transitions. [2023-09-01 14:30:42,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28479133927012396 [2023-09-01 14:30:42,186 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1631 transitions. [2023-09-01 14:30:42,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1631 transitions. [2023-09-01 14:30:42,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:42,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1631 transitions. [2023-09-01 14:30:42,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 70.91304347826087) internal successors, (1631), 23 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:42,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:42,211 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 249.0) internal successors, (5976), 24 states have internal predecessors, (5976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:42,211 INFO L175 Difference]: Start difference. First operand has 103 places, 142 transitions, 1489 flow. Second operand 23 states and 1631 transitions. [2023-09-01 14:30:42,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 250 transitions, 2814 flow [2023-09-01 14:30:42,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 250 transitions, 2725 flow, removed 6 selfloop flow, removed 12 redundant places. [2023-09-01 14:30:42,237 INFO L231 Difference]: Finished difference. Result has 122 places, 198 transitions, 2353 flow [2023-09-01 14:30:42,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2353, PETRI_PLACES=122, PETRI_TRANSITIONS=198} [2023-09-01 14:30:42,239 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 101 predicate places. [2023-09-01 14:30:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 198 transitions, 2353 flow [2023-09-01 14:30:42,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 67.67857142857143) internal successors, (1895), 28 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:42,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:42,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:42,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:42,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:42,445 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:42,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:42,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1149990549, now seen corresponding path program 4 times [2023-09-01 14:30:42,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:42,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432654700] [2023-09-01 14:30:42,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:42,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:43,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:43,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432654700] [2023-09-01 14:30:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432654700] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:43,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076017453] [2023-09-01 14:30:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:30:43,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:43,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:43,245 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:43,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-09-01 14:30:43,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:30:43,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 14:30:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:43,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:30:43,563 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-09-01 14:30:43,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 10 [2023-09-01 14:30:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:43,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:43,777 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:43,777 INFO L350 Elim1Store]: Elim1 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 86 treesize of output 70 [2023-09-01 14:30:43,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2023-09-01 14:30:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:43,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076017453] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:43,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:43,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-09-01 14:30:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053369223] [2023-09-01 14:30:43,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:43,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:30:43,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:30:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2023-09-01 14:30:44,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:30:44,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 198 transitions, 2353 flow. Second operand has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:44,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:44,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:30:44,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:45,599 INFO L130 PetriNetUnfolder]: 548/1082 cut-off events. [2023-09-01 14:30:45,599 INFO L131 PetriNetUnfolder]: For 6867/6867 co-relation queries the response was YES. [2023-09-01 14:30:45,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6022 conditions, 1082 events. 548/1082 cut-off events. For 6867/6867 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 6007 event pairs, 64 based on Foata normal form. 2/1033 useless extension candidates. Maximal degree in co-relation 5910. Up to 862 conditions per place. [2023-09-01 14:30:45,610 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 168 selfloop transitions, 57 changer transitions 22/248 dead transitions. [2023-09-01 14:30:45,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 248 transitions, 3109 flow [2023-09-01 14:30:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:30:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:30:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1466 transitions. [2023-09-01 14:30:45,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29437751004016066 [2023-09-01 14:30:45,614 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1466 transitions. [2023-09-01 14:30:45,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1466 transitions. [2023-09-01 14:30:45,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:45,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1466 transitions. [2023-09-01 14:30:45,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 73.3) internal successors, (1466), 20 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:45,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:45,624 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:45,626 INFO L175 Difference]: Start difference. First operand has 122 places, 198 transitions, 2353 flow. Second operand 20 states and 1466 transitions. [2023-09-01 14:30:45,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 248 transitions, 3109 flow [2023-09-01 14:30:45,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 248 transitions, 2959 flow, removed 61 selfloop flow, removed 9 redundant places. [2023-09-01 14:30:45,664 INFO L231 Difference]: Finished difference. Result has 137 places, 200 transitions, 2392 flow [2023-09-01 14:30:45,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2392, PETRI_PLACES=137, PETRI_TRANSITIONS=200} [2023-09-01 14:30:45,665 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 116 predicate places. [2023-09-01 14:30:45,666 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 200 transitions, 2392 flow [2023-09-01 14:30:45,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 70.84) internal successors, (1771), 25 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:45,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:45,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:45,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-09-01 14:30:45,874 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:45,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -427006029, now seen corresponding path program 5 times [2023-09-01 14:30:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:45,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506463751] [2023-09-01 14:30:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506463751] [2023-09-01 14:30:46,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506463751] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:46,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393450322] [2023-09-01 14:30:46,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:30:46,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:46,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:46,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:46,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-09-01 14:30:46,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:30:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:46,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-09-01 14:30:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:46,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:30:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393450322] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:46,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-09-01 14:30:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298709924] [2023-09-01 14:30:46,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:46,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-09-01 14:30:46,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-09-01 14:30:46,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-09-01 14:30:46,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 249 [2023-09-01 14:30:46,378 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 200 transitions, 2392 flow. Second operand has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:46,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:46,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 249 [2023-09-01 14:30:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:46,595 INFO L130 PetriNetUnfolder]: 269/570 cut-off events. [2023-09-01 14:30:46,595 INFO L131 PetriNetUnfolder]: For 5034/5037 co-relation queries the response was YES. [2023-09-01 14:30:46,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 570 events. 269/570 cut-off events. For 5034/5037 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2843 event pairs, 75 based on Foata normal form. 43/584 useless extension candidates. Maximal degree in co-relation 3474. Up to 404 conditions per place. [2023-09-01 14:30:46,601 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 111 selfloop transitions, 9 changer transitions 16/141 dead transitions. [2023-09-01 14:30:46,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 141 transitions, 1969 flow [2023-09-01 14:30:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-09-01 14:30:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-09-01 14:30:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-09-01 14:30:46,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43022088353413657 [2023-09-01 14:30:46,603 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-09-01 14:30:46,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-09-01 14:30:46,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:46,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-09-01 14:30:46,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:46,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:46,607 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:46,607 INFO L175 Difference]: Start difference. First operand has 137 places, 200 transitions, 2392 flow. Second operand 8 states and 857 transitions. [2023-09-01 14:30:46,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 141 transitions, 1969 flow [2023-09-01 14:30:46,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1676 flow, removed 28 selfloop flow, removed 30 redundant places. [2023-09-01 14:30:46,627 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 1179 flow [2023-09-01 14:30:46,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1179, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2023-09-01 14:30:46,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-09-01 14:30:46,628 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 1179 flow [2023-09-01 14:30:46,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.72222222222223) internal successors, (1867), 18 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:46,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:46,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:46,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:46,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:46,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:46,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:46,834 INFO L85 PathProgramCache]: Analyzing trace with hash -569502272, now seen corresponding path program 6 times [2023-09-01 14:30:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886316957] [2023-09-01 14:30:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886316957] [2023-09-01 14:30:46,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886316957] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:46,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916957844] [2023-09-01 14:30:46,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:30:46,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:46,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:46,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:46,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-09-01 14:30:47,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 14:30:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-09-01 14:30:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:47,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916957844] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:47,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:47,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 18 [2023-09-01 14:30:47,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782674652] [2023-09-01 14:30:47,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:47,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-09-01 14:30:47,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-09-01 14:30:47,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-09-01 14:30:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 249 [2023-09-01 14:30:47,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 1179 flow. Second operand has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:47,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:47,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 249 [2023-09-01 14:30:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:47,639 INFO L130 PetriNetUnfolder]: 334/696 cut-off events. [2023-09-01 14:30:47,640 INFO L131 PetriNetUnfolder]: For 3397/3400 co-relation queries the response was YES. [2023-09-01 14:30:47,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3592 conditions, 696 events. 334/696 cut-off events. For 3397/3400 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3573 event pairs, 16 based on Foata normal form. 23/648 useless extension candidates. Maximal degree in co-relation 3559. Up to 278 conditions per place. [2023-09-01 14:30:47,645 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 64 selfloop transitions, 57 changer transitions 45/170 dead transitions. [2023-09-01 14:30:47,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 170 transitions, 1845 flow [2023-09-01 14:30:47,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-09-01 14:30:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-09-01 14:30:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1376 transitions. [2023-09-01 14:30:47,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42508495520543715 [2023-09-01 14:30:47,652 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1376 transitions. [2023-09-01 14:30:47,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1376 transitions. [2023-09-01 14:30:47,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:47,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1376 transitions. [2023-09-01 14:30:47,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.84615384615384) internal successors, (1376), 13 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:47,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:47,658 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:47,658 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 1179 flow. Second operand 13 states and 1376 transitions. [2023-09-01 14:30:47,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 170 transitions, 1845 flow [2023-09-01 14:30:47,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 170 transitions, 1809 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-09-01 14:30:47,673 INFO L231 Difference]: Finished difference. Result has 104 places, 104 transitions, 1172 flow [2023-09-01 14:30:47,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1172, PETRI_PLACES=104, PETRI_TRANSITIONS=104} [2023-09-01 14:30:47,674 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-09-01 14:30:47,674 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 104 transitions, 1172 flow [2023-09-01 14:30:47,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:47,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:47,675 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:47,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:47,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-09-01 14:30:47,880 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:47,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:47,881 INFO L85 PathProgramCache]: Analyzing trace with hash -423472240, now seen corresponding path program 7 times [2023-09-01 14:30:47,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:47,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057085994] [2023-09-01 14:30:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:47,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:48,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:48,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057085994] [2023-09-01 14:30:48,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057085994] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:48,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785096613] [2023-09-01 14:30:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:30:48,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:48,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:48,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:48,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-09-01 14:30:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:48,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-09-01 14:30:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:48,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:48,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:30:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:30:49,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:49,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:49,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 112 [2023-09-01 14:30:49,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2023-09-01 14:30:49,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2023-09-01 14:30:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:30:49,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785096613] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:49,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 25 [2023-09-01 14:30:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949089223] [2023-09-01 14:30:49,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:30:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:30:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2023-09-01 14:30:50,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:30:50,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 104 transitions, 1172 flow. Second operand has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:50,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:50,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:30:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:51,171 INFO L130 PetriNetUnfolder]: 303/608 cut-off events. [2023-09-01 14:30:51,171 INFO L131 PetriNetUnfolder]: For 3753/3756 co-relation queries the response was YES. [2023-09-01 14:30:51,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 608 events. 303/608 cut-off events. For 3753/3756 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2849 event pairs, 18 based on Foata normal form. 9/546 useless extension candidates. Maximal degree in co-relation 3542. Up to 448 conditions per place. [2023-09-01 14:30:51,176 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 88 selfloop transitions, 38 changer transitions 29/156 dead transitions. [2023-09-01 14:30:51,177 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 156 transitions, 1935 flow [2023-09-01 14:30:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-09-01 14:30:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-09-01 14:30:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1179 transitions. [2023-09-01 14:30:51,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29593373493975905 [2023-09-01 14:30:51,179 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1179 transitions. [2023-09-01 14:30:51,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1179 transitions. [2023-09-01 14:30:51,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:51,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1179 transitions. [2023-09-01 14:30:51,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.6875) internal successors, (1179), 16 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:51,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:51,186 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:51,186 INFO L175 Difference]: Start difference. First operand has 104 places, 104 transitions, 1172 flow. Second operand 16 states and 1179 transitions. [2023-09-01 14:30:51,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 156 transitions, 1935 flow [2023-09-01 14:30:51,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 156 transitions, 1816 flow, removed 50 selfloop flow, removed 9 redundant places. [2023-09-01 14:30:51,200 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 1292 flow [2023-09-01 14:30:51,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1292, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2023-09-01 14:30:51,201 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 74 predicate places. [2023-09-01 14:30:51,201 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 1292 flow [2023-09-01 14:30:51,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 70.70370370370371) internal successors, (1909), 27 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:51,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:51,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-09-01 14:30:51,407 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:51,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:51,407 INFO L85 PathProgramCache]: Analyzing trace with hash -468317386, now seen corresponding path program 8 times [2023-09-01 14:30:51,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:51,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224835442] [2023-09-01 14:30:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:51,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224835442] [2023-09-01 14:30:51,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224835442] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:51,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669036611] [2023-09-01 14:30:51,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:30:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:51,821 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-09-01 14:30:51,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:30:51,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:51,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2023-09-01 14:30:51,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:52,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:52,316 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:30:52,317 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-09-01 14:30:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:52,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669036611] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:52,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:52,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-09-01 14:30:52,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102472435] [2023-09-01 14:30:52,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:52,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 14:30:52,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:52,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 14:30:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2023-09-01 14:30:53,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-09-01 14:30:53,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 1292 flow. Second operand has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:53,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:53,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-09-01 14:30:53,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:54,966 INFO L130 PetriNetUnfolder]: 757/1446 cut-off events. [2023-09-01 14:30:54,966 INFO L131 PetriNetUnfolder]: For 6489/6497 co-relation queries the response was YES. [2023-09-01 14:30:54,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 1446 events. 757/1446 cut-off events. For 6489/6497 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8115 event pairs, 37 based on Foata normal form. 100/1317 useless extension candidates. Maximal degree in co-relation 7521. Up to 777 conditions per place. [2023-09-01 14:30:54,976 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 202 selfloop transitions, 189 changer transitions 1/397 dead transitions. [2023-09-01 14:30:54,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 397 transitions, 4152 flow [2023-09-01 14:30:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-09-01 14:30:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-09-01 14:30:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4030 transitions. [2023-09-01 14:30:54,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046184738955823 [2023-09-01 14:30:54,982 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4030 transitions. [2023-09-01 14:30:54,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4030 transitions. [2023-09-01 14:30:54,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:54,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4030 transitions. [2023-09-01 14:30:54,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 100.75) internal successors, (4030), 40 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:54,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:54,998 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 249.0) internal successors, (10209), 41 states have internal predecessors, (10209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:54,998 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 1292 flow. Second operand 40 states and 4030 transitions. [2023-09-01 14:30:54,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 397 transitions, 4152 flow [2023-09-01 14:30:55,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 397 transitions, 3926 flow, removed 77 selfloop flow, removed 12 redundant places. [2023-09-01 14:30:55,021 INFO L231 Difference]: Finished difference. Result has 125 places, 263 transitions, 3328 flow [2023-09-01 14:30:55,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3328, PETRI_PLACES=125, PETRI_TRANSITIONS=263} [2023-09-01 14:30:55,021 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-09-01 14:30:55,022 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 263 transitions, 3328 flow [2023-09-01 14:30:55,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.65517241379311) internal successors, (2774), 29 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:55,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:55,022 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:55,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:55,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-09-01 14:30:55,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:55,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1087033086, now seen corresponding path program 9 times [2023-09-01 14:30:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:55,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648955211] [2023-09-01 14:30:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:55,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648955211] [2023-09-01 14:30:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648955211] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622505667] [2023-09-01 14:30:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:30:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:55,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:55,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-09-01 14:30:56,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:30:56,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:56,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2023-09-01 14:30:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:56,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:30:56,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:30:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:30:56,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:30:56,285 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_509 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_509) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-09-01 14:30:56,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:30:56,295 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-09-01 14:30:56,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-09-01 14:30:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-09-01 14:30:56,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622505667] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:30:56,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:30:56,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-09-01 14:30:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890988377] [2023-09-01 14:30:56,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:30:56,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-09-01 14:30:56,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:30:56,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-09-01 14:30:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2023-09-01 14:30:56,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-09-01 14:30:56,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 263 transitions, 3328 flow. Second operand has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:56,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:30:56,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-09-01 14:30:56,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:30:57,446 INFO L130 PetriNetUnfolder]: 1163/2163 cut-off events. [2023-09-01 14:30:57,447 INFO L131 PetriNetUnfolder]: For 10079/10084 co-relation queries the response was YES. [2023-09-01 14:30:57,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 2163 events. 1163/2163 cut-off events. For 10079/10084 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12432 event pairs, 24 based on Foata normal form. 100/1975 useless extension candidates. Maximal degree in co-relation 12804. Up to 1295 conditions per place. [2023-09-01 14:30:57,462 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 288 selfloop transitions, 200 changer transitions 2/495 dead transitions. [2023-09-01 14:30:57,462 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 495 transitions, 6651 flow [2023-09-01 14:30:57,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-09-01 14:30:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-09-01 14:30:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1801 transitions. [2023-09-01 14:30:57,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444253203289348 [2023-09-01 14:30:57,465 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1801 transitions. [2023-09-01 14:30:57,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1801 transitions. [2023-09-01 14:30:57,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:30:57,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1801 transitions. [2023-09-01 14:30:57,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 85.76190476190476) internal successors, (1801), 21 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:57,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:57,473 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 249.0) internal successors, (5478), 22 states have internal predecessors, (5478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:57,473 INFO L175 Difference]: Start difference. First operand has 125 places, 263 transitions, 3328 flow. Second operand 21 states and 1801 transitions. [2023-09-01 14:30:57,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 495 transitions, 6651 flow [2023-09-01 14:30:57,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 495 transitions, 5525 flow, removed 557 selfloop flow, removed 5 redundant places. [2023-09-01 14:30:57,518 INFO L231 Difference]: Finished difference. Result has 148 places, 377 transitions, 4656 flow [2023-09-01 14:30:57,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4656, PETRI_PLACES=148, PETRI_TRANSITIONS=377} [2023-09-01 14:30:57,518 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-09-01 14:30:57,519 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 377 transitions, 4656 flow [2023-09-01 14:30:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.75) internal successors, (1962), 24 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:30:57,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:30:57,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:30:57,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-09-01 14:30:57,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-09-01 14:30:57,725 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:30:57,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:30:57,725 INFO L85 PathProgramCache]: Analyzing trace with hash 812732897, now seen corresponding path program 10 times [2023-09-01 14:30:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:30:57,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131244640] [2023-09-01 14:30:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:30:57,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:30:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:30:58,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:58,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:30:58,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131244640] [2023-09-01 14:30:58,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131244640] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:30:58,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696877464] [2023-09-01 14:30:58,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:30:58,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:30:58,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:30:58,493 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:30:58,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-09-01 14:30:58,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:30:58,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:30:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 71 conjunts are in the unsatisfiable core [2023-09-01 14:30:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:30:58,668 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:58,722 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:58,777 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:58,819 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:58,899 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:30:59,331 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-09-01 14:30:59,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-09-01 14:30:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:30:59,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:31:17,582 INFO L321 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-09-01 14:31:17,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 481 treesize of output 331 [2023-09-01 14:31:17,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:17,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 720 treesize of output 782 [2023-09-01 14:31:17,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:17,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 639 treesize of output 620 [2023-09-01 14:31:17,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:17,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 575 treesize of output 588 [2023-09-01 14:31:18,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:18,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 578 treesize of output 654 [2023-09-01 14:31:18,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:18,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 511 treesize of output 492 [2023-09-01 14:31:18,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:31:18,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 447 treesize of output 460 [2023-09-01 14:32:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:32:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696877464] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:32:12,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:32:12,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-09-01 14:32:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483443543] [2023-09-01 14:32:12,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:32:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 14:32:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:32:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 14:32:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1140, Unknown=8, NotChecked=0, Total=1332 [2023-09-01 14:32:14,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:16,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:18,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:20,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:22,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:24,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:26,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:28,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:30,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:32,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:34,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:36,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:38,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:40,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:42,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:44,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:46,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:48,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:50,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:52,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:54,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:56,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:32:59,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:01,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:03,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:05,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:07,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:09,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:11,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:33:11,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-09-01 14:33:11,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 377 transitions, 4656 flow. Second operand has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:33:11,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:33:11,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-09-01 14:33:11,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:33:20,753 WARN L222 SmtUtils]: Spent 8.74s on a formula simplification that was a NOOP. DAG size: 104 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:33:47,246 WARN L222 SmtUtils]: Spent 26.32s on a formula simplification. DAG size of input: 112 DAG size of output: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:34:16,422 WARN L222 SmtUtils]: Spent 28.97s on a formula simplification. DAG size of input: 117 DAG size of output: 114 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:34:18,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:24,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:26,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:42,957 WARN L222 SmtUtils]: Spent 16.35s on a formula simplification. DAG size of input: 136 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:34:45,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:47,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:49,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:34:50,186 INFO L130 PetriNetUnfolder]: 1347/2518 cut-off events. [2023-09-01 14:34:50,187 INFO L131 PetriNetUnfolder]: For 12207/12208 co-relation queries the response was YES. [2023-09-01 14:34:50,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14160 conditions, 2518 events. 1347/2518 cut-off events. For 12207/12208 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15277 event pairs, 152 based on Foata normal form. 4/2372 useless extension candidates. Maximal degree in co-relation 14114. Up to 1697 conditions per place. [2023-09-01 14:34:50,203 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 423 selfloop transitions, 85 changer transitions 5/514 dead transitions. [2023-09-01 14:34:50,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 514 transitions, 6798 flow [2023-09-01 14:34:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-09-01 14:34:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-09-01 14:34:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1707 transitions. [2023-09-01 14:34:50,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2856425702811245 [2023-09-01 14:34:50,206 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1707 transitions. [2023-09-01 14:34:50,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1707 transitions. [2023-09-01 14:34:50,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:34:50,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1707 transitions. [2023-09-01 14:34:50,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.125) internal successors, (1707), 24 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:50,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:50,216 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:50,216 INFO L175 Difference]: Start difference. First operand has 148 places, 377 transitions, 4656 flow. Second operand 24 states and 1707 transitions. [2023-09-01 14:34:50,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 514 transitions, 6798 flow [2023-09-01 14:34:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 514 transitions, 6360 flow, removed 153 selfloop flow, removed 10 redundant places. [2023-09-01 14:34:50,278 INFO L231 Difference]: Finished difference. Result has 171 places, 429 transitions, 5140 flow [2023-09-01 14:34:50,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4231, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5140, PETRI_PLACES=171, PETRI_TRANSITIONS=429} [2023-09-01 14:34:50,279 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-09-01 14:34:50,279 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 429 transitions, 5140 flow [2023-09-01 14:34:50,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 67.56756756756756) internal successors, (2500), 37 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:50,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:34:50,280 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:34:50,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-09-01 14:34:50,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:50,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:34:50,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:34:50,486 INFO L85 PathProgramCache]: Analyzing trace with hash 164827637, now seen corresponding path program 11 times [2023-09-01 14:34:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:34:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797640409] [2023-09-01 14:34:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:34:50,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:34:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:34:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:51,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:34:51,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797640409] [2023-09-01 14:34:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797640409] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:34:51,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944533582] [2023-09-01 14:34:51,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:34:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:34:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:34:51,347 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:34:51,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-09-01 14:34:51,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:34:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:34:51,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 60 conjunts are in the unsatisfiable core [2023-09-01 14:34:51,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:34:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:52,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:34:52,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:34:52,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 68 [2023-09-01 14:34:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:34:52,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944533582] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:34:52,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:34:52,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-09-01 14:34:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165640835] [2023-09-01 14:34:52,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:34:52,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-09-01 14:34:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:34:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-09-01 14:34:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-09-01 14:34:55,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 249 [2023-09-01 14:34:55,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 429 transitions, 5140 flow. Second operand has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:34:55,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:34:55,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 249 [2023-09-01 14:34:55,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:01,521 INFO L130 PetriNetUnfolder]: 1834/3463 cut-off events. [2023-09-01 14:35:01,522 INFO L131 PetriNetUnfolder]: For 16547/16547 co-relation queries the response was YES. [2023-09-01 14:35:01,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19479 conditions, 3463 events. 1834/3463 cut-off events. For 16547/16547 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 23198 event pairs, 98 based on Foata normal form. 37/3325 useless extension candidates. Maximal degree in co-relation 19424. Up to 2258 conditions per place. [2023-09-01 14:35:01,552 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 426 selfloop transitions, 275 changer transitions 32/734 dead transitions. [2023-09-01 14:35:01,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 734 transitions, 9215 flow [2023-09-01 14:35:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-09-01 14:35:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-09-01 14:35:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3932 transitions. [2023-09-01 14:35:01,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36723638741010556 [2023-09-01 14:35:01,558 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3932 transitions. [2023-09-01 14:35:01,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3932 transitions. [2023-09-01 14:35:01,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:01,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3932 transitions. [2023-09-01 14:35:01,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 91.44186046511628) internal successors, (3932), 43 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:01,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:01,575 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:01,575 INFO L175 Difference]: Start difference. First operand has 171 places, 429 transitions, 5140 flow. Second operand 43 states and 3932 transitions. [2023-09-01 14:35:01,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 734 transitions, 9215 flow [2023-09-01 14:35:01,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 734 transitions, 8947 flow, removed 105 selfloop flow, removed 8 redundant places. [2023-09-01 14:35:01,728 INFO L231 Difference]: Finished difference. Result has 225 places, 581 transitions, 7824 flow [2023-09-01 14:35:01,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7824, PETRI_PLACES=225, PETRI_TRANSITIONS=581} [2023-09-01 14:35:01,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 204 predicate places. [2023-09-01 14:35:01,729 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 581 transitions, 7824 flow [2023-09-01 14:35:01,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.65714285714286) internal successors, (3068), 35 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:01,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:01,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:01,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:01,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-09-01 14:35:01,936 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:01,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash 211530823, now seen corresponding path program 12 times [2023-09-01 14:35:01,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:01,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829275028] [2023-09-01 14:35:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:01,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:03,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:03,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829275028] [2023-09-01 14:35:03,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829275028] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:03,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3095965] [2023-09-01 14:35:03,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:35:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:03,001 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:03,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-09-01 14:35:03,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:35:03,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjunts are in the unsatisfiable core [2023-09-01 14:35:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:35:03,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:03,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:03,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 62 [2023-09-01 14:35:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:35:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3095965] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:04,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:04,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-09-01 14:35:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955031482] [2023-09-01 14:35:04,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:04,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-09-01 14:35:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-09-01 14:35:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2023-09-01 14:35:06,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:35:06,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 581 transitions, 7824 flow. Second operand has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:06,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:06,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:35:06,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:10,195 INFO L130 PetriNetUnfolder]: 1902/3627 cut-off events. [2023-09-01 14:35:10,195 INFO L131 PetriNetUnfolder]: For 23068/23069 co-relation queries the response was YES. [2023-09-01 14:35:10,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22564 conditions, 3627 events. 1902/3627 cut-off events. For 23068/23069 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24833 event pairs, 511 based on Foata normal form. 7/3483 useless extension candidates. Maximal degree in co-relation 22489. Up to 3092 conditions per place. [2023-09-01 14:35:10,267 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 578 selfloop transitions, 119 changer transitions 32/730 dead transitions. [2023-09-01 14:35:10,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 730 transitions, 10504 flow [2023-09-01 14:35:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 14:35:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 14:35:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3437 transitions. [2023-09-01 14:35:10,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37305980679474654 [2023-09-01 14:35:10,272 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3437 transitions. [2023-09-01 14:35:10,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3437 transitions. [2023-09-01 14:35:10,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:10,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3437 transitions. [2023-09-01 14:35:10,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 92.89189189189189) internal successors, (3437), 37 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:10,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:10,284 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:10,284 INFO L175 Difference]: Start difference. First operand has 225 places, 581 transitions, 7824 flow. Second operand 37 states and 3437 transitions. [2023-09-01 14:35:10,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 730 transitions, 10504 flow [2023-09-01 14:35:10,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 730 transitions, 9995 flow, removed 227 selfloop flow, removed 16 redundant places. [2023-09-01 14:35:10,531 INFO L231 Difference]: Finished difference. Result has 256 places, 619 transitions, 8280 flow [2023-09-01 14:35:10,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7369, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=8280, PETRI_PLACES=256, PETRI_TRANSITIONS=619} [2023-09-01 14:35:10,532 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-09-01 14:35:10,532 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 619 transitions, 8280 flow [2023-09-01 14:35:10,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 89.71428571428571) internal successors, (2512), 28 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:10,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:10,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:10,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:10,739 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:10,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:10,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1336306565, now seen corresponding path program 13 times [2023-09-01 14:35:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:10,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658764434] [2023-09-01 14:35:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:11,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658764434] [2023-09-01 14:35:11,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658764434] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:11,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237648446] [2023-09-01 14:35:11,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:35:11,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:11,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:11,888 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:11,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-09-01 14:35:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:11,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-09-01 14:35:11,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:12,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:35:12,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 14:35:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:12,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:12,911 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset)) (.cse3 (+ .cse6 c_~q~0.offset 4))) (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse3))) (or (= .cse4 0) (<= c_~N~0 (+ c_~s~0 (select .cse5 .cse2) .cse4))))))))) is different from false [2023-09-01 14:35:13,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:13,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 168 [2023-09-01 14:35:13,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:13,245 INFO L350 Elim1Store]: Elim1 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 123 treesize of output 103 [2023-09-01 14:35:13,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:13,256 INFO L350 Elim1Store]: Elim1 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 103 treesize of output 83 [2023-09-01 14:35:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:13,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237648446] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:13,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:13,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-09-01 14:35:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677715940] [2023-09-01 14:35:13,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:35:13,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:35:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1162, Unknown=9, NotChecked=70, Total=1406 [2023-09-01 14:35:13,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:35:13,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 619 transitions, 8280 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:13,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:13,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:35:13,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:18,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:35:18,719 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse12 c_~q~0.offset)) (.cse4 (+ .cse12 c_~q~0.offset 4))) (let ((.cse0 (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse10 (select .cse11 .cse4))) (or (= .cse10 0) (< (+ c_~s~0 (select .cse11 .cse3) .cse10) (+ c_~N~0 1))))))) (.cse7 (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse8 (select .cse9 .cse4))) (or (= .cse8 0) (<= c_~N~0 (+ c_~s~0 (select .cse9 .cse3) .cse8)))))))) (and .cse0 (or (and (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse1 (select .cse2 .cse4))) (or (= .cse1 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse2 .cse3) .cse1)))))) (forall ((v_ArrVal_670 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_670) c_~q~0.base))) (let ((.cse6 (select .cse5 .cse4))) (or (< (+ c_~s~0 (select .cse5 .cse3) .cse6) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse6 0)))))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) .cse7 (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (and .cse0 .cse7)))))) is different from false [2023-09-01 14:35:20,851 INFO L130 PetriNetUnfolder]: 2297/4345 cut-off events. [2023-09-01 14:35:20,851 INFO L131 PetriNetUnfolder]: For 29642/29643 co-relation queries the response was YES. [2023-09-01 14:35:20,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27013 conditions, 4345 events. 2297/4345 cut-off events. For 29642/29643 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30685 event pairs, 192 based on Foata normal form. 5/4203 useless extension candidates. Maximal degree in co-relation 26927. Up to 3436 conditions per place. [2023-09-01 14:35:20,887 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 558 selfloop transitions, 304 changer transitions 6/869 dead transitions. [2023-09-01 14:35:20,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 869 transitions, 12787 flow [2023-09-01 14:35:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:35:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:35:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2147 transitions. [2023-09-01 14:35:20,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2973272399944606 [2023-09-01 14:35:20,892 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2147 transitions. [2023-09-01 14:35:20,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2147 transitions. [2023-09-01 14:35:20,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:20,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2147 transitions. [2023-09-01 14:35:20,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 74.03448275862068) internal successors, (2147), 29 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:20,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:20,901 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:20,901 INFO L175 Difference]: Start difference. First operand has 256 places, 619 transitions, 8280 flow. Second operand 29 states and 2147 transitions. [2023-09-01 14:35:20,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 869 transitions, 12787 flow [2023-09-01 14:35:21,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 869 transitions, 12537 flow, removed 65 selfloop flow, removed 20 redundant places. [2023-09-01 14:35:21,167 INFO L231 Difference]: Finished difference. Result has 273 places, 794 transitions, 11624 flow [2023-09-01 14:35:21,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=8067, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=11624, PETRI_PLACES=273, PETRI_TRANSITIONS=794} [2023-09-01 14:35:21,167 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-09-01 14:35:21,167 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 794 transitions, 11624 flow [2023-09-01 14:35:21,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:21,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:21,168 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:21,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:21,369 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:21,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1466481873, now seen corresponding path program 14 times [2023-09-01 14:35:21,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:21,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523298800] [2023-09-01 14:35:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:21,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523298800] [2023-09-01 14:35:22,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523298800] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177927686] [2023-09-01 14:35:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:35:22,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:22,194 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:22,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-09-01 14:35:22,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:35:22,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 14:35:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:35:22,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:22,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:22,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 65 [2023-09-01 14:35:23,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:35:23,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177927686] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:23,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:23,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-09-01 14:35:23,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497426941] [2023-09-01 14:35:23,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:35:23,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:23,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:35:23,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:35:24,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:35:24,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 794 transitions, 11624 flow. Second operand has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:24,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:24,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:35:24,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:27,311 INFO L130 PetriNetUnfolder]: 2352/4487 cut-off events. [2023-09-01 14:35:27,311 INFO L131 PetriNetUnfolder]: For 39045/39046 co-relation queries the response was YES. [2023-09-01 14:35:27,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31792 conditions, 4487 events. 2352/4487 cut-off events. For 39045/39046 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32058 event pairs, 594 based on Foata normal form. 14/4354 useless extension candidates. Maximal degree in co-relation 31697. Up to 4105 conditions per place. [2023-09-01 14:35:27,354 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 749 selfloop transitions, 92 changer transitions 43/885 dead transitions. [2023-09-01 14:35:27,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 885 transitions, 14294 flow [2023-09-01 14:35:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-09-01 14:35:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-09-01 14:35:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2772 transitions. [2023-09-01 14:35:27,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3710843373493976 [2023-09-01 14:35:27,359 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2772 transitions. [2023-09-01 14:35:27,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2772 transitions. [2023-09-01 14:35:27,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:27,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2772 transitions. [2023-09-01 14:35:27,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 92.4) internal successors, (2772), 30 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:27,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:27,371 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 249.0) internal successors, (7719), 31 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:27,371 INFO L175 Difference]: Start difference. First operand has 273 places, 794 transitions, 11624 flow. Second operand 30 states and 2772 transitions. [2023-09-01 14:35:27,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 885 transitions, 14294 flow [2023-09-01 14:35:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 885 transitions, 14091 flow, removed 78 selfloop flow, removed 10 redundant places. [2023-09-01 14:35:27,726 INFO L231 Difference]: Finished difference. Result has 302 places, 799 transitions, 11784 flow [2023-09-01 14:35:27,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=11427, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11784, PETRI_PLACES=302, PETRI_TRANSITIONS=799} [2023-09-01 14:35:27,727 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2023-09-01 14:35:27,727 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 799 transitions, 11784 flow [2023-09-01 14:35:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:27,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:27,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:27,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:27,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:27,928 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:27,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1059831511, now seen corresponding path program 15 times [2023-09-01 14:35:27,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29250536] [2023-09-01 14:35:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:29,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29250536] [2023-09-01 14:35:29,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29250536] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:29,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406299227] [2023-09-01 14:35:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:35:29,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:29,420 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:29,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-09-01 14:35:29,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:35:29,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2023-09-01 14:35:29,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:35:29,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:35:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:35:30,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:30,427 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse7 c_~q~0.offset)) (.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse4 (+ .cse7 c_~q~0.offset 4))) (and (forall ((v_ArrVal_747 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse4))) (or (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 .cse0 (select .cse1 .cse2))) (= .cse0 0) (not (= (select .cse1 .cse3) 1)))))) (forall ((v_ArrVal_747 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_747) c_~q~0.base))) (let ((.cse5 (select .cse6 .cse4))) (or (< (+ c_~s~0 .cse5 (select .cse6 .cse2)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse5 0) (not (= (select .cse6 .cse3) 1))))))))) is different from false [2023-09-01 14:35:30,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:30,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 214 [2023-09-01 14:35:30,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:30,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 165 [2023-09-01 14:35:30,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:30,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 138 [2023-09-01 14:35:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:35:31,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406299227] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:31,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:31,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-09-01 14:35:31,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870635042] [2023-09-01 14:35:31,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:31,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 14:35:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 14:35:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=847, Unknown=1, NotChecked=58, Total=992 [2023-09-01 14:35:31,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-09-01 14:35:31,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 799 transitions, 11784 flow. Second operand has 32 states, 32 states have (on average 67.6875) internal successors, (2166), 32 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:31,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:31,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-09-01 14:35:31,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:35:45,626 WARN L222 SmtUtils]: Spent 12.55s on a formula simplification. DAG size of input: 88 DAG size of output: 86 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-09-01 14:35:48,933 INFO L130 PetriNetUnfolder]: 1422/2954 cut-off events. [2023-09-01 14:35:48,934 INFO L131 PetriNetUnfolder]: For 35380/35381 co-relation queries the response was YES. [2023-09-01 14:35:48,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22997 conditions, 2954 events. 1422/2954 cut-off events. For 35380/35381 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21052 event pairs, 103 based on Foata normal form. 245/3118 useless extension candidates. Maximal degree in co-relation 22891. Up to 1473 conditions per place. [2023-09-01 14:35:48,960 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 353 selfloop transitions, 205 changer transitions 136/695 dead transitions. [2023-09-01 14:35:48,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 695 transitions, 11712 flow [2023-09-01 14:35:48,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-09-01 14:35:48,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-09-01 14:35:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3844 transitions. [2023-09-01 14:35:48,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2858842778521493 [2023-09-01 14:35:48,965 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3844 transitions. [2023-09-01 14:35:48,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3844 transitions. [2023-09-01 14:35:48,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:35:48,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3844 transitions. [2023-09-01 14:35:48,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 71.18518518518519) internal successors, (3844), 54 states have internal predecessors, (3844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:48,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 249.0) internal successors, (13695), 55 states have internal predecessors, (13695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:48,981 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 249.0) internal successors, (13695), 55 states have internal predecessors, (13695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:48,981 INFO L175 Difference]: Start difference. First operand has 302 places, 799 transitions, 11784 flow. Second operand 54 states and 3844 transitions. [2023-09-01 14:35:48,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 695 transitions, 11712 flow [2023-09-01 14:35:49,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 695 transitions, 11236 flow, removed 151 selfloop flow, removed 30 redundant places. [2023-09-01 14:35:49,232 INFO L231 Difference]: Finished difference. Result has 328 places, 441 transitions, 7860 flow [2023-09-01 14:35:49,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=7860, PETRI_PLACES=328, PETRI_TRANSITIONS=441} [2023-09-01 14:35:49,233 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 307 predicate places. [2023-09-01 14:35:49,233 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 441 transitions, 7860 flow [2023-09-01 14:35:49,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 67.6875) internal successors, (2166), 32 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:49,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:35:49,234 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:35:49,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-09-01 14:35:49,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:49,434 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:35:49,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:35:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -348910683, now seen corresponding path program 16 times [2023-09-01 14:35:49,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:35:49,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121167202] [2023-09-01 14:35:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:35:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:35:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:35:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:51,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:35:51,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121167202] [2023-09-01 14:35:51,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121167202] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:35:51,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138967650] [2023-09-01 14:35:51,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:35:51,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:35:51,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:35:51,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:35:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-09-01 14:35:51,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:35:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:35:51,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 62 conjunts are in the unsatisfiable core [2023-09-01 14:35:51,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:35:51,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:35:51,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:35:51,918 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-09-01 14:35:51,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-09-01 14:35:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:52,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:35:52,721 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-09-01 14:35:52,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 310 treesize of output 254 [2023-09-01 14:35:52,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:52,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 200 [2023-09-01 14:35:52,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:35:52,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 168 [2023-09-01 14:35:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:35:54,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138967650] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:35:54,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:35:54,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-09-01 14:35:54,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820947804] [2023-09-01 14:35:54,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:35:54,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:35:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:35:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:35:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1227, Unknown=2, NotChecked=0, Total=1406 [2023-09-01 14:35:56,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-09-01 14:35:56,171 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 441 transitions, 7860 flow. Second operand has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:35:56,171 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:35:56,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-09-01 14:35:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:03,019 INFO L130 PetriNetUnfolder]: 1433/3032 cut-off events. [2023-09-01 14:36:03,020 INFO L131 PetriNetUnfolder]: For 46730/46731 co-relation queries the response was YES. [2023-09-01 14:36:03,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25861 conditions, 3032 events. 1433/3032 cut-off events. For 46730/46731 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21851 event pairs, 188 based on Foata normal form. 68/3039 useless extension candidates. Maximal degree in co-relation 25738. Up to 1415 conditions per place. [2023-09-01 14:36:03,051 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 308 selfloop transitions, 305 changer transitions 59/673 dead transitions. [2023-09-01 14:36:03,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 673 transitions, 12396 flow [2023-09-01 14:36:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-09-01 14:36:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-09-01 14:36:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2580 transitions. [2023-09-01 14:36:03,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878179384203481 [2023-09-01 14:36:03,056 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2580 transitions. [2023-09-01 14:36:03,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2580 transitions. [2023-09-01 14:36:03,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:03,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2580 transitions. [2023-09-01 14:36:03,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 71.66666666666667) internal successors, (2580), 36 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,067 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 249.0) internal successors, (9213), 37 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,067 INFO L175 Difference]: Start difference. First operand has 328 places, 441 transitions, 7860 flow. Second operand 36 states and 2580 transitions. [2023-09-01 14:36:03,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 673 transitions, 12396 flow [2023-09-01 14:36:03,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 673 transitions, 11642 flow, removed 315 selfloop flow, removed 30 redundant places. [2023-09-01 14:36:03,379 INFO L231 Difference]: Finished difference. Result has 330 places, 522 transitions, 9810 flow [2023-09-01 14:36:03,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7236, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=9810, PETRI_PLACES=330, PETRI_TRANSITIONS=522} [2023-09-01 14:36:03,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-09-01 14:36:03,380 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 522 transitions, 9810 flow [2023-09-01 14:36:03,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:03,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:03,381 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:03,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:03,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-09-01 14:36:03,581 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:03,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1796296705, now seen corresponding path program 17 times [2023-09-01 14:36:03,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:03,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354155347] [2023-09-01 14:36:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:03,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:04,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:04,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354155347] [2023-09-01 14:36:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354155347] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919713964] [2023-09-01 14:36:04,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:36:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:04,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:04,930 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:04,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-09-01 14:36:05,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:36:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjunts are in the unsatisfiable core [2023-09-01 14:36:05,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:05,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 14:36:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:05,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:06,125 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_825 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))) (+ c_~N~0 1))) (forall ((v_ArrVal_825 (Array Int Int))) (<= c_~N~0 (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_825) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2)))))))) (<= c_~n~0 c_~q_back~0)) is different from false [2023-09-01 14:36:06,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:06,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-09-01 14:36:06,326 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:06,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-09-01 14:36:06,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:06,336 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 53 [2023-09-01 14:36:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:06,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919713964] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:06,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:06,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-09-01 14:36:06,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105220187] [2023-09-01 14:36:06,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:06,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:36:06,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:06,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:36:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1140, Unknown=7, NotChecked=70, Total=1406 [2023-09-01 14:36:07,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:36:07,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 522 transitions, 9810 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:07,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:07,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:36:07,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:25,738 INFO L130 PetriNetUnfolder]: 1517/3177 cut-off events. [2023-09-01 14:36:25,738 INFO L131 PetriNetUnfolder]: For 53173/53173 co-relation queries the response was YES. [2023-09-01 14:36:25,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28345 conditions, 3177 events. 1517/3177 cut-off events. For 53173/53173 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 23181 event pairs, 190 based on Foata normal form. 4/3150 useless extension candidates. Maximal degree in co-relation 28221. Up to 2322 conditions per place. [2023-09-01 14:36:25,772 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 482 selfloop transitions, 199 changer transitions 27/709 dead transitions. [2023-09-01 14:36:25,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 709 transitions, 13934 flow [2023-09-01 14:36:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-09-01 14:36:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-09-01 14:36:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2737 transitions. [2023-09-01 14:36:25,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29708021274286334 [2023-09-01 14:36:25,776 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2737 transitions. [2023-09-01 14:36:25,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2737 transitions. [2023-09-01 14:36:25,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:25,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2737 transitions. [2023-09-01 14:36:25,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.97297297297297) internal successors, (2737), 37 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:25,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:25,787 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:25,787 INFO L175 Difference]: Start difference. First operand has 330 places, 522 transitions, 9810 flow. Second operand 37 states and 2737 transitions. [2023-09-01 14:36:25,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 709 transitions, 13934 flow [2023-09-01 14:36:26,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 709 transitions, 12564 flow, removed 609 selfloop flow, removed 24 redundant places. [2023-09-01 14:36:26,287 INFO L231 Difference]: Finished difference. Result has 346 places, 599 transitions, 10850 flow [2023-09-01 14:36:26,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=8654, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10850, PETRI_PLACES=346, PETRI_TRANSITIONS=599} [2023-09-01 14:36:26,288 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-09-01 14:36:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 599 transitions, 10850 flow [2023-09-01 14:36:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:26,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:26,289 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:26,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:26,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-09-01 14:36:26,495 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:26,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -999070149, now seen corresponding path program 18 times [2023-09-01 14:36:26,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:26,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046130475] [2023-09-01 14:36:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:27,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:27,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046130475] [2023-09-01 14:36:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046130475] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:27,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7670625] [2023-09-01 14:36:27,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:36:27,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:27,687 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-09-01 14:36:27,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:36:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 73 conjunts are in the unsatisfiable core [2023-09-01 14:36:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:28,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:28,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-09-01 14:36:28,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:28,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-09-01 14:36:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:28,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:29,010 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse8 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse8 c_~q~0.offset)) (.cse3 (+ .cse8 c_~q~0.offset 4))) (and (forall ((v_ArrVal_864 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_864) c_~q~0.base))) (let ((.cse0 (select .cse2 .cse4)) (.cse1 (select .cse2 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 .cse1 .cse0) (+ c_~N~0 1)) (= .cse1 0))))) (forall ((v_ArrVal_864 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_864) c_~q~0.base))) (let ((.cse6 (select .cse7 .cse3)) (.cse5 (select .cse7 .cse4))) (or (= .cse5 0) (= .cse6 0) (<= c_~N~0 (+ c_~s~0 .cse6 .cse5))))))))) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0) (< c_~q_front~0 0) (<= c_~q_back~0 c_~q_front~0)) is different from false [2023-09-01 14:36:29,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_back~0 1))) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (<= .cse0 c_~q_front~0) (< c_~q_front~0 0) (let ((.cse9 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse9 c_~q~0.offset 4)) (.cse5 (+ .cse9 c_~q~0.offset))) (and (forall ((v_ArrVal_864 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_864) c_~q~0.base))) (let ((.cse1 (select .cse3 .cse5)) (.cse2 (select .cse3 .cse4))) (or (= .cse1 0) (< (+ c_~s~0 .cse2 .cse1) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|)) (= .cse2 0))))) (forall ((v_ArrVal_864 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_864) c_~q~0.base))) (let ((.cse6 (select .cse8 .cse5)) (.cse7 (select .cse8 .cse4))) (or (= .cse6 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 .cse7 .cse6)) (= .cse7 0)))))))) (<= c_~n~0 .cse0))) is different from false [2023-09-01 14:36:29,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:29,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 210 [2023-09-01 14:36:29,136 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:29,137 INFO L350 Elim1Store]: Elim1 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 165 treesize of output 139 [2023-09-01 14:36:29,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:29,150 INFO L350 Elim1Store]: Elim1 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 139 treesize of output 113 [2023-09-01 14:36:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-09-01 14:36:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7670625] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:29,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:29,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-09-01 14:36:29,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72607819] [2023-09-01 14:36:29,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:29,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:36:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:36:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1063, Unknown=2, NotChecked=138, Total=1406 [2023-09-01 14:36:30,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:36:30,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 599 transitions, 10850 flow. Second operand has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:30,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:30,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:36:30,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:38,459 INFO L130 PetriNetUnfolder]: 1782/3666 cut-off events. [2023-09-01 14:36:38,460 INFO L131 PetriNetUnfolder]: For 59284/59285 co-relation queries the response was YES. [2023-09-01 14:36:38,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31931 conditions, 3666 events. 1782/3666 cut-off events. For 59284/59285 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 26431 event pairs, 153 based on Foata normal form. 77/3715 useless extension candidates. Maximal degree in co-relation 31806. Up to 1523 conditions per place. [2023-09-01 14:36:38,497 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 442 selfloop transitions, 391 changer transitions 60/894 dead transitions. [2023-09-01 14:36:38,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 894 transitions, 16702 flow [2023-09-01 14:36:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 14:36:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 14:36:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3707 transitions. [2023-09-01 14:36:38,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29775100401606425 [2023-09-01 14:36:38,501 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3707 transitions. [2023-09-01 14:36:38,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3707 transitions. [2023-09-01 14:36:38,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:38,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3707 transitions. [2023-09-01 14:36:38,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 74.14) internal successors, (3707), 50 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:38,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:38,514 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:38,515 INFO L175 Difference]: Start difference. First operand has 346 places, 599 transitions, 10850 flow. Second operand 50 states and 3707 transitions. [2023-09-01 14:36:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 894 transitions, 16702 flow [2023-09-01 14:36:38,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 894 transitions, 15797 flow, removed 338 selfloop flow, removed 28 redundant places. [2023-09-01 14:36:38,913 INFO L231 Difference]: Finished difference. Result has 373 places, 698 transitions, 13302 flow [2023-09-01 14:36:38,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9410, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=13302, PETRI_PLACES=373, PETRI_TRANSITIONS=698} [2023-09-01 14:36:38,914 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-09-01 14:36:38,914 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 698 transitions, 13302 flow [2023-09-01 14:36:38,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.47368421052632) internal successors, (2678), 38 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:38,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:38,915 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:38,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:39,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:39,116 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:39,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -540806737, now seen corresponding path program 19 times [2023-09-01 14:36:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:39,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320308036] [2023-09-01 14:36:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:39,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:40,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320308036] [2023-09-01 14:36:40,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320308036] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841175883] [2023-09-01 14:36:40,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:36:40,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:40,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:40,162 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:40,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-09-01 14:36:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:40,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2023-09-01 14:36:40,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:36:40,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-09-01 14:36:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 14:36:40,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:41,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:41,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 252 treesize of output 212 [2023-09-01 14:36:41,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:41,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 164 [2023-09-01 14:36:41,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:41,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 138 [2023-09-01 14:36:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:36:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841175883] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:42,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:42,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-09-01 14:36:42,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277636702] [2023-09-01 14:36:42,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:42,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-09-01 14:36:42,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:42,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-09-01 14:36:42,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=958, Unknown=6, NotChecked=0, Total=1056 [2023-09-01 14:36:45,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:36:45,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 698 transitions, 13302 flow. Second operand has 33 states, 33 states have (on average 70.66666666666667) internal successors, (2332), 33 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:45,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:45,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:36:45,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:50,649 INFO L130 PetriNetUnfolder]: 1731/3580 cut-off events. [2023-09-01 14:36:50,650 INFO L131 PetriNetUnfolder]: For 63177/63178 co-relation queries the response was YES. [2023-09-01 14:36:50,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32917 conditions, 3580 events. 1731/3580 cut-off events. For 63177/63178 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25783 event pairs, 305 based on Foata normal form. 5/3571 useless extension candidates. Maximal degree in co-relation 32780. Up to 3214 conditions per place. [2023-09-01 14:36:50,691 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 642 selfloop transitions, 108 changer transitions 21/772 dead transitions. [2023-09-01 14:36:50,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 772 transitions, 15867 flow [2023-09-01 14:36:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:36:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:36:50,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2121 transitions. [2023-09-01 14:36:50,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2937266306605733 [2023-09-01 14:36:50,694 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2121 transitions. [2023-09-01 14:36:50,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2121 transitions. [2023-09-01 14:36:50,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:50,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2121 transitions. [2023-09-01 14:36:50,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 73.13793103448276) internal successors, (2121), 29 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:50,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:50,702 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:50,702 INFO L175 Difference]: Start difference. First operand has 373 places, 698 transitions, 13302 flow. Second operand 29 states and 2121 transitions. [2023-09-01 14:36:50,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 772 transitions, 15867 flow [2023-09-01 14:36:51,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 772 transitions, 15124 flow, removed 334 selfloop flow, removed 22 redundant places. [2023-09-01 14:36:51,290 INFO L231 Difference]: Finished difference. Result has 381 places, 709 transitions, 13066 flow [2023-09-01 14:36:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=12581, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13066, PETRI_PLACES=381, PETRI_TRANSITIONS=709} [2023-09-01 14:36:51,291 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 360 predicate places. [2023-09-01 14:36:51,291 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 709 transitions, 13066 flow [2023-09-01 14:36:51,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 70.66666666666667) internal successors, (2332), 33 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:51,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:51,291 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:51,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-09-01 14:36:51,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:51,497 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:51,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:51,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1003464460, now seen corresponding path program 20 times [2023-09-01 14:36:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:51,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027870857] [2023-09-01 14:36:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:36:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027870857] [2023-09-01 14:36:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027870857] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518334620] [2023-09-01 14:36:51,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:36:51,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:51,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:51,645 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:51,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-09-01 14:36:51,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:36:51,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:51,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2023-09-01 14:36:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:51,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:36:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518334620] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:52,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:52,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 24 [2023-09-01 14:36:52,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879859286] [2023-09-01 14:36:52,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:52,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-09-01 14:36:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-09-01 14:36:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2023-09-01 14:36:52,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 249 [2023-09-01 14:36:52,422 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 709 transitions, 13066 flow. Second operand has 25 states, 25 states have (on average 102.16) internal successors, (2554), 25 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:52,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:52,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 249 [2023-09-01 14:36:52,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:36:53,505 INFO L130 PetriNetUnfolder]: 913/1977 cut-off events. [2023-09-01 14:36:53,506 INFO L131 PetriNetUnfolder]: For 40995/41002 co-relation queries the response was YES. [2023-09-01 14:36:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18789 conditions, 1977 events. 913/1977 cut-off events. For 40995/41002 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13564 event pairs, 30 based on Foata normal form. 285/2245 useless extension candidates. Maximal degree in co-relation 18648. Up to 691 conditions per place. [2023-09-01 14:36:53,526 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 140 selfloop transitions, 200 changer transitions 190/535 dead transitions. [2023-09-01 14:36:53,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 535 transitions, 10808 flow [2023-09-01 14:36:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-09-01 14:36:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-09-01 14:36:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2115 transitions. [2023-09-01 14:36:53,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246987951807229 [2023-09-01 14:36:53,529 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2115 transitions. [2023-09-01 14:36:53,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2115 transitions. [2023-09-01 14:36:53,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:36:53,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2115 transitions. [2023-09-01 14:36:53,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.75) internal successors, (2115), 20 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:53,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:53,535 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:53,535 INFO L175 Difference]: Start difference. First operand has 381 places, 709 transitions, 13066 flow. Second operand 20 states and 2115 transitions. [2023-09-01 14:36:53,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 535 transitions, 10808 flow [2023-09-01 14:36:53,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 535 transitions, 10119 flow, removed 118 selfloop flow, removed 57 redundant places. [2023-09-01 14:36:53,755 INFO L231 Difference]: Finished difference. Result has 330 places, 299 transitions, 5777 flow [2023-09-01 14:36:53,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7756, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5777, PETRI_PLACES=330, PETRI_TRANSITIONS=299} [2023-09-01 14:36:53,756 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-09-01 14:36:53,756 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 299 transitions, 5777 flow [2023-09-01 14:36:53,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 102.16) internal successors, (2554), 25 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:53,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:36:53,757 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:36:53,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-09-01 14:36:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-09-01 14:36:53,957 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:36:53,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:36:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2001646390, now seen corresponding path program 21 times [2023-09-01 14:36:53,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:36:53,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303960955] [2023-09-01 14:36:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:36:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:36:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:36:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:36:55,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:36:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303960955] [2023-09-01 14:36:55,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303960955] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:36:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413200259] [2023-09-01 14:36:55,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:36:55,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:36:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:36:55,492 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:36:55,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-09-01 14:36:55,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 14:36:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:36:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 44 conjunts are in the unsatisfiable core [2023-09-01 14:36:55,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:36:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:36:55,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:36:56,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:36:56,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 68 [2023-09-01 14:36:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:36:56,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413200259] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:36:56,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:36:56,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2023-09-01 14:36:56,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755492630] [2023-09-01 14:36:56,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:36:56,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-09-01 14:36:56,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:36:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-09-01 14:36:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-09-01 14:36:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:36:58,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 299 transitions, 5777 flow. Second operand has 27 states, 27 states have (on average 89.85185185185185) internal successors, (2426), 27 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:36:58,637 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:36:58,637 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:36:58,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:00,783 INFO L130 PetriNetUnfolder]: 693/1425 cut-off events. [2023-09-01 14:37:00,783 INFO L131 PetriNetUnfolder]: For 27702/27702 co-relation queries the response was YES. [2023-09-01 14:37:00,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14096 conditions, 1425 events. 693/1425 cut-off events. For 27702/27702 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8519 event pairs, 122 based on Foata normal form. 3/1415 useless extension candidates. Maximal degree in co-relation 13990. Up to 1058 conditions per place. [2023-09-01 14:37:00,796 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 236 selfloop transitions, 89 changer transitions 68/394 dead transitions. [2023-09-01 14:37:00,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 394 transitions, 8107 flow [2023-09-01 14:37:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-09-01 14:37:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-09-01 14:37:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2670 transitions. [2023-09-01 14:37:00,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697548815953469 [2023-09-01 14:37:00,799 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2670 transitions. [2023-09-01 14:37:00,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2670 transitions. [2023-09-01 14:37:00,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:00,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2670 transitions. [2023-09-01 14:37:00,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 92.06896551724138) internal successors, (2670), 29 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:00,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:00,804 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:00,805 INFO L175 Difference]: Start difference. First operand has 330 places, 299 transitions, 5777 flow. Second operand 29 states and 2670 transitions. [2023-09-01 14:37:00,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 394 transitions, 8107 flow [2023-09-01 14:37:00,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 394 transitions, 7261 flow, removed 190 selfloop flow, removed 55 redundant places. [2023-09-01 14:37:00,922 INFO L231 Difference]: Finished difference. Result has 246 places, 298 transitions, 5385 flow [2023-09-01 14:37:00,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5385, PETRI_PLACES=246, PETRI_TRANSITIONS=298} [2023-09-01 14:37:00,922 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-09-01 14:37:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 298 transitions, 5385 flow [2023-09-01 14:37:00,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 89.85185185185185) internal successors, (2426), 27 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:00,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:00,923 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:00,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:01,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-09-01 14:37:01,129 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:01,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -578806920, now seen corresponding path program 22 times [2023-09-01 14:37:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369184571] [2023-09-01 14:37:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:01,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369184571] [2023-09-01 14:37:03,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369184571] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:03,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054804614] [2023-09-01 14:37:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:37:03,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:03,004 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:03,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-09-01 14:37:03,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:37:03,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:03,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 14:37:03,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:03,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:37:03,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-09-01 14:37:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:37:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:04,343 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:04,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 139 treesize of output 124 [2023-09-01 14:37:04,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:04,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 66 [2023-09-01 14:37:04,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:04,361 INFO L350 Elim1Store]: Elim1 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 66 treesize of output 53 [2023-09-01 14:37:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054804614] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:04,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-09-01 14:37:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131622126] [2023-09-01 14:37:04,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 14:37:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:04,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 14:37:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1162, Unknown=1, NotChecked=0, Total=1260 [2023-09-01 14:37:08,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:37:08,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 298 transitions, 5385 flow. Second operand has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:08,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:08,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:37:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:11,077 INFO L130 PetriNetUnfolder]: 655/1356 cut-off events. [2023-09-01 14:37:11,077 INFO L131 PetriNetUnfolder]: For 18983/18983 co-relation queries the response was YES. [2023-09-01 14:37:11,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12004 conditions, 1356 events. 655/1356 cut-off events. For 18983/18983 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7970 event pairs, 32 based on Foata normal form. 4/1306 useless extension candidates. Maximal degree in co-relation 11914. Up to 939 conditions per place. [2023-09-01 14:37:11,090 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 218 selfloop transitions, 108 changer transitions 46/373 dead transitions. [2023-09-01 14:37:11,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 373 transitions, 6998 flow [2023-09-01 14:37:11,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:37:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:37:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1902 transitions. [2023-09-01 14:37:11,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.293790546802595 [2023-09-01 14:37:11,092 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1902 transitions. [2023-09-01 14:37:11,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1902 transitions. [2023-09-01 14:37:11,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:11,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1902 transitions. [2023-09-01 14:37:11,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.15384615384616) internal successors, (1902), 26 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:11,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:11,099 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:11,099 INFO L175 Difference]: Start difference. First operand has 246 places, 298 transitions, 5385 flow. Second operand 26 states and 1902 transitions. [2023-09-01 14:37:11,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 373 transitions, 6998 flow [2023-09-01 14:37:11,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 373 transitions, 6817 flow, removed 42 selfloop flow, removed 13 redundant places. [2023-09-01 14:37:11,190 INFO L231 Difference]: Finished difference. Result has 254 places, 294 transitions, 5458 flow [2023-09-01 14:37:11,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5458, PETRI_PLACES=254, PETRI_TRANSITIONS=294} [2023-09-01 14:37:11,192 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2023-09-01 14:37:11,192 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 294 transitions, 5458 flow [2023-09-01 14:37:11,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:11,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:11,192 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:11,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:11,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-09-01 14:37:11,399 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:11,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1200083842, now seen corresponding path program 23 times [2023-09-01 14:37:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:11,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636890164] [2023-09-01 14:37:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:11,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:12,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636890164] [2023-09-01 14:37:12,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636890164] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:12,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539212074] [2023-09-01 14:37:12,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:37:12,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:12,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:12,663 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-09-01 14:37:12,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:37:12,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 14:37:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:13,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:37:13,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:37:13,314 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-09-01 14:37:13,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2023-09-01 14:37:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:37:13,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:14,216 INFO L321 Elim1Store]: treesize reduction 10, result has 87.3 percent of original size [2023-09-01 14:37:14,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 226 [2023-09-01 14:37:14,255 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-09-01 14:37:14,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 153 [2023-09-01 14:37:14,291 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-09-01 14:37:14,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 134 [2023-09-01 14:37:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:16,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539212074] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:16,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:16,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-09-01 14:37:16,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243616149] [2023-09-01 14:37:16,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:16,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-09-01 14:37:16,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:16,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-09-01 14:37:16,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1091, Unknown=1, NotChecked=0, Total=1260 [2023-09-01 14:37:19,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-09-01 14:37:19,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 294 transitions, 5458 flow. Second operand has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:19,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:19,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-09-01 14:37:19,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:26,237 INFO L130 PetriNetUnfolder]: 626/1280 cut-off events. [2023-09-01 14:37:26,237 INFO L131 PetriNetUnfolder]: For 20029/20029 co-relation queries the response was YES. [2023-09-01 14:37:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11595 conditions, 1280 events. 626/1280 cut-off events. For 20029/20029 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7242 event pairs, 81 based on Foata normal form. 3/1223 useless extension candidates. Maximal degree in co-relation 11500. Up to 911 conditions per place. [2023-09-01 14:37:26,249 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 217 selfloop transitions, 131 changer transitions 29/378 dead transitions. [2023-09-01 14:37:26,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 378 transitions, 7234 flow [2023-09-01 14:37:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-09-01 14:37:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-09-01 14:37:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2401 transitions. [2023-09-01 14:37:26,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2921990994280151 [2023-09-01 14:37:26,252 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2401 transitions. [2023-09-01 14:37:26,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2401 transitions. [2023-09-01 14:37:26,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:26,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2401 transitions. [2023-09-01 14:37:26,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 72.75757575757575) internal successors, (2401), 33 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:26,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:26,260 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 249.0) internal successors, (8466), 34 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:26,261 INFO L175 Difference]: Start difference. First operand has 254 places, 294 transitions, 5458 flow. Second operand 33 states and 2401 transitions. [2023-09-01 14:37:26,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 378 transitions, 7234 flow [2023-09-01 14:37:26,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 378 transitions, 6953 flow, removed 41 selfloop flow, removed 20 redundant places. [2023-09-01 14:37:26,372 INFO L231 Difference]: Finished difference. Result has 269 places, 311 transitions, 5804 flow [2023-09-01 14:37:26,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=5197, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5804, PETRI_PLACES=269, PETRI_TRANSITIONS=311} [2023-09-01 14:37:26,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 248 predicate places. [2023-09-01 14:37:26,372 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 311 transitions, 5804 flow [2023-09-01 14:37:26,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.61111111111111) internal successors, (2542), 36 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:26,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:26,373 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:26,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:26,578 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:26,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 870808413, now seen corresponding path program 24 times [2023-09-01 14:37:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923841719] [2023-09-01 14:37:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:37:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923841719] [2023-09-01 14:37:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923841719] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013639936] [2023-09-01 14:37:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:37:26,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:26,749 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:26,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-09-01 14:37:26,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-09-01 14:37:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjunts are in the unsatisfiable core [2023-09-01 14:37:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:37:27,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:37:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013639936] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:27,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-09-01 14:37:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389668800] [2023-09-01 14:37:27,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-09-01 14:37:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-09-01 14:37:27,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2023-09-01 14:37:27,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 249 [2023-09-01 14:37:27,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 311 transitions, 5804 flow. Second operand has 30 states, 30 states have (on average 101.8) internal successors, (3054), 30 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:27,610 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:27,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 249 [2023-09-01 14:37:27,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:28,634 INFO L130 PetriNetUnfolder]: 865/1711 cut-off events. [2023-09-01 14:37:28,635 INFO L131 PetriNetUnfolder]: For 26443/26452 co-relation queries the response was YES. [2023-09-01 14:37:28,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 1711 events. 865/1711 cut-off events. For 26443/26452 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10181 event pairs, 100 based on Foata normal form. 74/1683 useless extension candidates. Maximal degree in co-relation 15038. Up to 919 conditions per place. [2023-09-01 14:37:28,654 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 304 selfloop transitions, 69 changer transitions 67/446 dead transitions. [2023-09-01 14:37:28,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 446 transitions, 8587 flow [2023-09-01 14:37:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-09-01 14:37:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-09-01 14:37:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2799 transitions. [2023-09-01 14:37:28,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41633199464524767 [2023-09-01 14:37:28,657 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2799 transitions. [2023-09-01 14:37:28,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2799 transitions. [2023-09-01 14:37:28,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:28,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2799 transitions. [2023-09-01 14:37:28,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 103.66666666666667) internal successors, (2799), 27 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:28,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:28,664 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:28,665 INFO L175 Difference]: Start difference. First operand has 269 places, 311 transitions, 5804 flow. Second operand 27 states and 2799 transitions. [2023-09-01 14:37:28,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 446 transitions, 8587 flow [2023-09-01 14:37:28,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 446 transitions, 7807 flow, removed 211 selfloop flow, removed 37 redundant places. [2023-09-01 14:37:28,802 INFO L231 Difference]: Finished difference. Result has 246 places, 298 transitions, 5654 flow [2023-09-01 14:37:28,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=4923, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5654, PETRI_PLACES=246, PETRI_TRANSITIONS=298} [2023-09-01 14:37:28,803 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-09-01 14:37:28,803 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 298 transitions, 5654 flow [2023-09-01 14:37:28,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 101.8) internal successors, (3054), 30 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:28,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:28,803 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:28,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:29,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:29,005 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:29,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:29,005 INFO L85 PathProgramCache]: Analyzing trace with hash 260113872, now seen corresponding path program 25 times [2023-09-01 14:37:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:29,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73316280] [2023-09-01 14:37:29,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:29,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:29,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:29,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73316280] [2023-09-01 14:37:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73316280] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:29,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252693473] [2023-09-01 14:37:29,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:37:29,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:29,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:29,578 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:29,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-09-01 14:37:29,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 41 conjunts are in the unsatisfiable core [2023-09-01 14:37:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:30,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:30,442 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:37:30,442 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-09-01 14:37:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:31,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252693473] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:31,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:31,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-09-01 14:37:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957277226] [2023-09-01 14:37:31,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:31,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 14:37:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 14:37:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1333, Unknown=0, NotChecked=0, Total=1560 [2023-09-01 14:37:33,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 249 [2023-09-01 14:37:33,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 298 transitions, 5654 flow. Second operand has 40 states, 40 states have (on average 90.55) internal successors, (3622), 40 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:33,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:33,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 249 [2023-09-01 14:37:33,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:36,460 INFO L130 PetriNetUnfolder]: 989/2031 cut-off events. [2023-09-01 14:37:36,460 INFO L131 PetriNetUnfolder]: For 23789/23789 co-relation queries the response was YES. [2023-09-01 14:37:36,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15984 conditions, 2031 events. 989/2031 cut-off events. For 23789/23789 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13067 event pairs, 94 based on Foata normal form. 28/1975 useless extension candidates. Maximal degree in co-relation 15887. Up to 860 conditions per place. [2023-09-01 14:37:36,479 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 314 selfloop transitions, 211 changer transitions 9/535 dead transitions. [2023-09-01 14:37:36,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 535 transitions, 9257 flow [2023-09-01 14:37:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-09-01 14:37:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-09-01 14:37:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3305 transitions. [2023-09-01 14:37:36,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37923121055651177 [2023-09-01 14:37:36,482 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3305 transitions. [2023-09-01 14:37:36,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3305 transitions. [2023-09-01 14:37:36,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:36,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3305 transitions. [2023-09-01 14:37:36,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 94.42857142857143) internal successors, (3305), 35 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:36,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 249.0) internal successors, (8964), 36 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:36,492 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 249.0) internal successors, (8964), 36 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:36,492 INFO L175 Difference]: Start difference. First operand has 246 places, 298 transitions, 5654 flow. Second operand 35 states and 3305 transitions. [2023-09-01 14:37:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 535 transitions, 9257 flow [2023-09-01 14:37:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 535 transitions, 8753 flow, removed 151 selfloop flow, removed 17 redundant places. [2023-09-01 14:37:36,637 INFO L231 Difference]: Finished difference. Result has 242 places, 423 transitions, 7816 flow [2023-09-01 14:37:36,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=7816, PETRI_PLACES=242, PETRI_TRANSITIONS=423} [2023-09-01 14:37:36,639 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 221 predicate places. [2023-09-01 14:37:36,639 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 423 transitions, 7816 flow [2023-09-01 14:37:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 90.55) internal successors, (3622), 40 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:36,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:36,640 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:36,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:36,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:36,849 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:36,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:36,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1395589058, now seen corresponding path program 26 times [2023-09-01 14:37:36,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:36,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152682452] [2023-09-01 14:37:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:37,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152682452] [2023-09-01 14:37:37,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152682452] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:37,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128468155] [2023-09-01 14:37:37,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:37:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:37,374 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:37,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-09-01 14:37:37,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:37:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2023-09-01 14:37:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:37,981 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:37:37,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 11 [2023-09-01 14:37:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:38,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:38,203 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:37:38,203 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-09-01 14:37:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:38,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128468155] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:38,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:38,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-09-01 14:37:38,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900314364] [2023-09-01 14:37:38,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:38,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-09-01 14:37:38,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:38,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-09-01 14:37:38,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2023-09-01 14:37:39,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-09-01 14:37:39,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 423 transitions, 7816 flow. Second operand has 38 states, 38 states have (on average 95.44736842105263) internal successors, (3627), 38 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:39,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:39,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-09-01 14:37:39,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:42,658 INFO L130 PetriNetUnfolder]: 981/2116 cut-off events. [2023-09-01 14:37:42,658 INFO L131 PetriNetUnfolder]: For 24800/24805 co-relation queries the response was YES. [2023-09-01 14:37:42,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16936 conditions, 2116 events. 981/2116 cut-off events. For 24800/24805 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14370 event pairs, 197 based on Foata normal form. 51/2150 useless extension candidates. Maximal degree in co-relation 16834. Up to 1042 conditions per place. [2023-09-01 14:37:42,679 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 374 selfloop transitions, 156 changer transitions 8/544 dead transitions. [2023-09-01 14:37:42,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 544 transitions, 9866 flow [2023-09-01 14:37:42,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-09-01 14:37:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-09-01 14:37:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3376 transitions. [2023-09-01 14:37:42,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987715568154973 [2023-09-01 14:37:42,681 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3376 transitions. [2023-09-01 14:37:42,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3376 transitions. [2023-09-01 14:37:42,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:42,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3376 transitions. [2023-09-01 14:37:42,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 99.29411764705883) internal successors, (3376), 34 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:42,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:42,688 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:42,688 INFO L175 Difference]: Start difference. First operand has 242 places, 423 transitions, 7816 flow. Second operand 34 states and 3376 transitions. [2023-09-01 14:37:42,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 544 transitions, 9866 flow [2023-09-01 14:37:42,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 544 transitions, 9250 flow, removed 278 selfloop flow, removed 11 redundant places. [2023-09-01 14:37:42,853 INFO L231 Difference]: Finished difference. Result has 273 places, 438 transitions, 8030 flow [2023-09-01 14:37:42,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7213, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8030, PETRI_PLACES=273, PETRI_TRANSITIONS=438} [2023-09-01 14:37:42,854 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-09-01 14:37:42,854 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 438 transitions, 8030 flow [2023-09-01 14:37:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 95.44736842105263) internal successors, (3627), 38 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:42,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:42,855 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:42,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:43,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-09-01 14:37:43,055 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:43,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash -444096378, now seen corresponding path program 27 times [2023-09-01 14:37:43,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:43,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517175099] [2023-09-01 14:37:43,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:43,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517175099] [2023-09-01 14:37:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517175099] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:43,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029962882] [2023-09-01 14:37:43,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 14:37:43,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:43,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:43,917 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:43,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-09-01 14:37:44,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 14:37:44,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2023-09-01 14:37:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:44,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:44,359 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-09-01 14:37:44,359 INFO L350 Elim1Store]: Elim1 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 26 treesize of output 14 [2023-09-01 14:37:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029962882] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:44,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 22 [2023-09-01 14:37:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552852682] [2023-09-01 14:37:44,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:44,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 14:37:44,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:44,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 14:37:44,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2023-09-01 14:37:45,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 249 [2023-09-01 14:37:45,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 438 transitions, 8030 flow. Second operand has 23 states, 23 states have (on average 96.91304347826087) internal successors, (2229), 23 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:45,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:45,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 249 [2023-09-01 14:37:45,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:47,811 INFO L130 PetriNetUnfolder]: 1142/2367 cut-off events. [2023-09-01 14:37:47,812 INFO L131 PetriNetUnfolder]: For 27480/27487 co-relation queries the response was YES. [2023-09-01 14:37:47,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18437 conditions, 2367 events. 1142/2367 cut-off events. For 27480/27487 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16023 event pairs, 97 based on Foata normal form. 93/2417 useless extension candidates. Maximal degree in co-relation 18327. Up to 870 conditions per place. [2023-09-01 14:37:47,837 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 297 selfloop transitions, 358 changer transitions 4/665 dead transitions. [2023-09-01 14:37:47,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 665 transitions, 11473 flow [2023-09-01 14:37:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 14:37:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 14:37:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4615 transitions. [2023-09-01 14:37:47,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029160118735813 [2023-09-01 14:37:47,841 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4615 transitions. [2023-09-01 14:37:47,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4615 transitions. [2023-09-01 14:37:47,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:47,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4615 transitions. [2023-09-01 14:37:47,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 100.32608695652173) internal successors, (4615), 46 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:47,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:47,850 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:47,850 INFO L175 Difference]: Start difference. First operand has 273 places, 438 transitions, 8030 flow. Second operand 46 states and 4615 transitions. [2023-09-01 14:37:47,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 665 transitions, 11473 flow [2023-09-01 14:37:48,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 665 transitions, 11101 flow, removed 79 selfloop flow, removed 19 redundant places. [2023-09-01 14:37:48,019 INFO L231 Difference]: Finished difference. Result has 307 places, 493 transitions, 9553 flow [2023-09-01 14:37:48,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7489, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=9553, PETRI_PLACES=307, PETRI_TRANSITIONS=493} [2023-09-01 14:37:48,019 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 286 predicate places. [2023-09-01 14:37:48,019 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 493 transitions, 9553 flow [2023-09-01 14:37:48,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 96.91304347826087) internal successors, (2229), 23 states have internal predecessors, (2229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:48,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:48,020 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:48,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:48,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:48,220 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:48,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:48,221 INFO L85 PathProgramCache]: Analyzing trace with hash 884440508, now seen corresponding path program 28 times [2023-09-01 14:37:48,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:48,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750166826] [2023-09-01 14:37:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:48,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750166826] [2023-09-01 14:37:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750166826] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297123949] [2023-09-01 14:37:48,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-09-01 14:37:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:48,797 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-09-01 14:37:48,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-09-01 14:37:48,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjunts are in the unsatisfiable core [2023-09-01 14:37:48,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:37:49,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-09-01 14:37:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:49,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:37:49,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:37:49,295 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 40 [2023-09-01 14:37:49,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-09-01 14:37:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:37:49,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297123949] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:37:49,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:37:49,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 30 [2023-09-01 14:37:49,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666078950] [2023-09-01 14:37:49,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:37:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-09-01 14:37:49,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:37:49,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-09-01 14:37:49,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=835, Unknown=2, NotChecked=0, Total=930 [2023-09-01 14:37:50,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 249 [2023-09-01 14:37:50,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 493 transitions, 9553 flow. Second operand has 31 states, 31 states have (on average 84.70967741935483) internal successors, (2626), 31 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:50,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:37:50,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 249 [2023-09-01 14:37:50,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:37:52,300 INFO L130 PetriNetUnfolder]: 1164/2396 cut-off events. [2023-09-01 14:37:52,300 INFO L131 PetriNetUnfolder]: For 29803/29810 co-relation queries the response was YES. [2023-09-01 14:37:52,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19677 conditions, 2396 events. 1164/2396 cut-off events. For 29803/29810 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15967 event pairs, 38 based on Foata normal form. 45/2406 useless extension candidates. Maximal degree in co-relation 19563. Up to 866 conditions per place. [2023-09-01 14:37:52,324 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 224 selfloop transitions, 353 changer transitions 0/583 dead transitions. [2023-09-01 14:37:52,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 583 transitions, 11470 flow [2023-09-01 14:37:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-09-01 14:37:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-09-01 14:37:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2283 transitions. [2023-09-01 14:37:52,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526413345690454 [2023-09-01 14:37:52,326 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2283 transitions. [2023-09-01 14:37:52,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2283 transitions. [2023-09-01 14:37:52,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:37:52,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2283 transitions. [2023-09-01 14:37:52,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 87.8076923076923) internal successors, (2283), 26 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:52,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:52,331 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:52,331 INFO L175 Difference]: Start difference. First operand has 307 places, 493 transitions, 9553 flow. Second operand 26 states and 2283 transitions. [2023-09-01 14:37:52,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 583 transitions, 11470 flow [2023-09-01 14:37:52,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 583 transitions, 10585 flow, removed 164 selfloop flow, removed 18 redundant places. [2023-09-01 14:37:52,553 INFO L231 Difference]: Finished difference. Result has 317 places, 503 transitions, 9721 flow [2023-09-01 14:37:52,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=8620, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9721, PETRI_PLACES=317, PETRI_TRANSITIONS=503} [2023-09-01 14:37:52,554 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 296 predicate places. [2023-09-01 14:37:52,554 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 503 transitions, 9721 flow [2023-09-01 14:37:52,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 84.70967741935483) internal successors, (2626), 31 states have internal predecessors, (2626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:37:52,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:37:52,555 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:37:52,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-09-01 14:37:52,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:52,755 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:37:52,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:37:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -526366999, now seen corresponding path program 29 times [2023-09-01 14:37:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:37:52,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451955779] [2023-09-01 14:37:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:37:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:37:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:37:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:54,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:37:54,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451955779] [2023-09-01 14:37:54,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451955779] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:37:54,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076949807] [2023-09-01 14:37:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 14:37:54,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:37:54,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:37:54,114 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:37:54,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-09-01 14:37:54,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 14:37:54,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:37:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 96 conjunts are in the unsatisfiable core [2023-09-01 14:37:54,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:37:54,311 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:54,357 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:54,416 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:54,466 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:54,522 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:54,573 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:37:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:37:55,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:38:08,073 INFO L321 Elim1Store]: treesize reduction 224, result has 40.3 percent of original size [2023-09-01 14:38:08,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 745 treesize of output 443 [2023-09-01 14:38:08,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 669 treesize of output 640 [2023-09-01 14:38:08,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:08,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 959 treesize of output 1150 [2023-09-01 14:38:08,585 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:08,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 834 treesize of output 825 [2023-09-01 14:38:08,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:08,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 740 treesize of output 778 [2023-09-01 14:38:09,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:09,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 751 treesize of output 962 [2023-09-01 14:38:09,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:09,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 646 treesize of output 637 [2023-09-01 14:38:09,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:38:09,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 552 treesize of output 590 [2023-09-01 14:41:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:41:42,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076949807] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:41:42,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:41:42,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2023-09-01 14:41:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003925998] [2023-09-01 14:41:42,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:41:42,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-09-01 14:41:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:41:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-09-01 14:41:42,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1885, Unknown=17, NotChecked=0, Total=2162 [2023-09-01 14:41:45,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-09-01 14:41:45,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 503 transitions, 9721 flow. Second operand has 47 states, 47 states have (on average 67.42553191489361) internal successors, (3169), 47 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:45,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:41:45,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-09-01 14:41:45,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:41:45,952 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse28 (* c_~q_front~0 4)) (.cse29 (* 4 c_~q_back~0))) (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse12 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse13 (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|)) (.cse4 (+ .cse29 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (+ .cse29 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse29 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse7 (+ .cse28 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse28 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse10 (+ .cse28 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (< c_~n~0 (+ 4 c_~q_back~0))) (.cse1 (< c_~q_front~0 0)) (.cse2 (<= c_~n~0 c_~q_front~0))) (and (or .cse0 .cse1 .cse2 (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int)) (or (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse3 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse5 (select .cse3 .cse10))) (or (not (= (select .cse3 .cse4) 1)) (= .cse5 0) (< (+ c_~s~0 .cse5 (select .cse3 .cse6) (select .cse3 .cse7)) 4) (not (= (select .cse3 .cse8) 1)) (not (= (select .cse3 .cse9) 1)))))) (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|))) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int)) (or (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse14 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse15 (select .cse14 .cse10))) (or (not (= (select .cse14 .cse4) 1)) (< 2 (+ c_~s~0 .cse15 (select .cse14 .cse6) (select .cse14 .cse7))) (= .cse15 0) (not (= (select .cse14 .cse8) 1)) (not (= (select .cse14 .cse9) 1)))))))))) (or .cse0 (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| Int)) (or (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214|) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int) (v_ArrVal_1321 Int)) (or (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse16 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store (store .cse11 .cse12 v_ArrVal_1321) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse17 (select .cse16 .cse10))) (or (not (= (select .cse16 .cse9) 1)) (not (= (select .cse16 .cse4) 1)) (< (+ c_~s~0 (select .cse16 .cse6) (select .cse16 .cse7) .cse17) 4) (not (= (select .cse16 .cse8) 1)) (= .cse17 0))))) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| 1) |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|))))) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| Int)) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int) (v_ArrVal_1321 Int)) (or (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse18 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store (store .cse11 .cse12 v_ArrVal_1321) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse19 (select .cse18 .cse10))) (or (not (= (select .cse18 .cse9) 1)) (not (= (select .cse18 .cse4) 1)) (not (= (select .cse18 .cse8) 1)) (< 2 (+ c_~s~0 (select .cse18 .cse6) (select .cse18 .cse7) .cse19)) (= .cse19 0))))) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214| 1) |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|) (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_214|)))) .cse1 .cse2) (or (and (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1326 Int)) (let ((.cse20 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse21 (select .cse20 .cse10))) (or (not (= (select .cse20 .cse8) 1)) (not (= (select .cse20 .cse4) 1)) (= .cse21 0) (< (+ (select .cse20 .cse6) c_~s~0 .cse21 (select .cse20 .cse7)) 4) (not (= (select .cse20 .cse9) 1)))))) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1326 Int)) (let ((.cse22 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse23 (select .cse22 .cse10))) (or (not (= (select .cse22 .cse8) 1)) (not (= (select .cse22 .cse4) 1)) (= .cse23 0) (< 2 (+ (select .cse22 .cse6) c_~s~0 .cse23 (select .cse22 .cse7))) (not (= (select .cse22 .cse9) 1))))))) .cse0 (< .cse13 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 .cse2) (or (and (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int))) (let ((.cse24 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse25 (select .cse24 .cse10))) (or (not (= (select .cse24 .cse4) 1)) (< (+ c_~s~0 .cse25 (select .cse24 .cse7) (select .cse24 .cse6)) 4) (= .cse25 0) (not (= (select .cse24 .cse9) 1)) (not (= (select .cse24 .cse8) 1)))))) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int))) (let ((.cse26 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse27 (select .cse26 .cse10))) (or (not (= (select .cse26 .cse4) 1)) (= .cse27 0) (not (= (select .cse26 .cse9) 1)) (not (= (select .cse26 .cse8) 1)) (< 2 (+ c_~s~0 .cse27 (select .cse26 .cse7) (select .cse26 .cse6)))))))) .cse0 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 .cse2)))) is different from false [2023-09-01 14:41:46,082 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse24 (* c_~q_front~0 4)) (.cse25 (* 4 c_~q_back~0))) (let ((.cse11 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse12 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse13 (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|)) (.cse4 (+ .cse25 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (+ .cse25 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (+ .cse25 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse7 (+ .cse24 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse10 (+ .cse24 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (< c_~n~0 (+ 4 c_~q_back~0))) (.cse1 (< c_~q_front~0 0)) (.cse2 (<= c_~n~0 c_~q_front~0))) (and (or .cse0 .cse1 .cse2 (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int)) (or (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse3 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse5 (select .cse3 .cse10))) (or (not (= (select .cse3 .cse4) 1)) (= .cse5 0) (< (+ c_~s~0 .cse5 (select .cse3 .cse6) (select .cse3 .cse7)) 4) (not (= (select .cse3 .cse8) 1)) (not (= (select .cse3 .cse9) 1)))))) (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|))) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| Int)) (or (< (+ |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< .cse13 |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213|) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1324 Int) (v_ArrVal_1326 Int)) (let ((.cse14 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse11 .cse12 v_ArrVal_1324) (+ (* |v_ULTIMATE.start_create_fresh_int_array_~i~1#1_213| 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse15 (select .cse14 .cse10))) (or (not (= (select .cse14 .cse4) 1)) (< 2 (+ c_~s~0 .cse15 (select .cse14 .cse6) (select .cse14 .cse7))) (= .cse15 0) (not (= (select .cse14 .cse8) 1)) (not (= (select .cse14 .cse9) 1)))))))))) (or (and (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1326 Int)) (let ((.cse16 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse17 (select .cse16 .cse10))) (or (not (= (select .cse16 .cse8) 1)) (not (= (select .cse16 .cse4) 1)) (= .cse17 0) (< (+ (select .cse16 .cse6) c_~s~0 .cse17 (select .cse16 .cse7)) 4) (not (= (select .cse16 .cse9) 1)))))) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int)) (v_ArrVal_1326 Int)) (let ((.cse18 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 .cse12 v_ArrVal_1326)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse19 (select .cse18 .cse10))) (or (not (= (select .cse18 .cse8) 1)) (not (= (select .cse18 .cse4) 1)) (= .cse19 0) (< 2 (+ (select .cse18 .cse6) c_~s~0 .cse19 (select .cse18 .cse7))) (not (= (select .cse18 .cse9) 1))))))) .cse0 (< .cse13 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 .cse2) (or (and (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int))) (let ((.cse20 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse21 (select .cse20 .cse10))) (or (not (= (select .cse20 .cse4) 1)) (< (+ c_~s~0 .cse21 (select .cse20 .cse7) (select .cse20 .cse6)) 4) (= .cse21 0) (not (= (select .cse20 .cse9) 1)) (not (= (select .cse20 .cse8) 1)))))) (forall ((v_ArrVal_1328 (Array Int Int)) (v_ArrVal_1327 (Array Int Int))) (let ((.cse22 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1327) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1328) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse23 (select .cse22 .cse10))) (or (not (= (select .cse22 .cse4) 1)) (= .cse23 0) (not (= (select .cse22 .cse9) 1)) (not (= (select .cse22 .cse8) 1)) (< 2 (+ c_~s~0 .cse23 (select .cse22 .cse7) (select .cse22 .cse6)))))))) .cse0 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 .cse2)))) is different from false [2023-09-01 14:41:51,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:53,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-09-01 14:41:58,845 INFO L130 PetriNetUnfolder]: 1475/3047 cut-off events. [2023-09-01 14:41:58,845 INFO L131 PetriNetUnfolder]: For 38664/38664 co-relation queries the response was YES. [2023-09-01 14:41:58,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25312 conditions, 3047 events. 1475/3047 cut-off events. For 38664/38664 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21580 event pairs, 251 based on Foata normal form. 4/2996 useless extension candidates. Maximal degree in co-relation 25199. Up to 2007 conditions per place. [2023-09-01 14:41:58,876 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 499 selfloop transitions, 250 changer transitions 14/764 dead transitions. [2023-09-01 14:41:58,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 764 transitions, 14933 flow [2023-09-01 14:41:58,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-09-01 14:41:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-09-01 14:41:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3250 transitions. [2023-09-01 14:41:58,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28374367033350795 [2023-09-01 14:41:58,880 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3250 transitions. [2023-09-01 14:41:58,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3250 transitions. [2023-09-01 14:41:58,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:41:58,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3250 transitions. [2023-09-01 14:41:58,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.65217391304348) internal successors, (3250), 46 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:58,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:58,887 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 249.0) internal successors, (11703), 47 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:58,887 INFO L175 Difference]: Start difference. First operand has 317 places, 503 transitions, 9721 flow. Second operand 46 states and 3250 transitions. [2023-09-01 14:41:58,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 764 transitions, 14933 flow [2023-09-01 14:41:59,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 764 transitions, 14520 flow, removed 72 selfloop flow, removed 12 redundant places. [2023-09-01 14:41:59,178 INFO L231 Difference]: Finished difference. Result has 372 places, 629 transitions, 12995 flow [2023-09-01 14:41:59,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12995, PETRI_PLACES=372, PETRI_TRANSITIONS=629} [2023-09-01 14:41:59,178 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 351 predicate places. [2023-09-01 14:41:59,178 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 629 transitions, 12995 flow [2023-09-01 14:41:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 67.42553191489361) internal successors, (3169), 47 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:41:59,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:41:59,179 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:41:59,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-09-01 14:41:59,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-09-01 14:41:59,379 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:41:59,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:41:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1461322381, now seen corresponding path program 30 times [2023-09-01 14:41:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:41:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125271971] [2023-09-01 14:41:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:41:59,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:41:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:00,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:42:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125271971] [2023-09-01 14:42:00,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125271971] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:42:00,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620435683] [2023-09-01 14:42:00,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 14:42:00,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:42:00,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:42:00,701 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:42:00,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-09-01 14:42:00,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-09-01 14:42:00,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:42:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2023-09-01 14:42:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:42:01,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:01,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 10 [2023-09-01 14:42:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:01,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:42:02,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:02,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 116 [2023-09-01 14:42:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620435683] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:42:02,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:42:02,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 45 [2023-09-01 14:42:02,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948904721] [2023-09-01 14:42:02,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:42:02,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-09-01 14:42:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:42:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-09-01 14:42:02,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1854, Unknown=0, NotChecked=0, Total=2162 [2023-09-01 14:42:05,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 249 [2023-09-01 14:42:05,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 629 transitions, 12995 flow. Second operand has 47 states, 47 states have (on average 82.42553191489361) internal successors, (3874), 47 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:05,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:42:05,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 249 [2023-09-01 14:42:05,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:42:14,370 INFO L130 PetriNetUnfolder]: 1590/3367 cut-off events. [2023-09-01 14:42:14,371 INFO L131 PetriNetUnfolder]: For 45538/45538 co-relation queries the response was YES. [2023-09-01 14:42:14,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28858 conditions, 3367 events. 1590/3367 cut-off events. For 45538/45538 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24797 event pairs, 274 based on Foata normal form. 7/3325 useless extension candidates. Maximal degree in co-relation 28722. Up to 2145 conditions per place. [2023-09-01 14:42:14,413 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 574 selfloop transitions, 270 changer transitions 26/871 dead transitions. [2023-09-01 14:42:14,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 871 transitions, 16811 flow [2023-09-01 14:42:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 14:42:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 14:42:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5738 transitions. [2023-09-01 14:42:14,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439429359227957 [2023-09-01 14:42:14,416 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5738 transitions. [2023-09-01 14:42:14,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5738 transitions. [2023-09-01 14:42:14,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:42:14,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5738 transitions. [2023-09-01 14:42:14,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 85.64179104477611) internal successors, (5738), 67 states have internal predecessors, (5738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:14,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 249.0) internal successors, (16932), 68 states have internal predecessors, (16932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:14,428 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 249.0) internal successors, (16932), 68 states have internal predecessors, (16932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:14,428 INFO L175 Difference]: Start difference. First operand has 372 places, 629 transitions, 12995 flow. Second operand 67 states and 5738 transitions. [2023-09-01 14:42:14,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 871 transitions, 16811 flow [2023-09-01 14:42:15,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 871 transitions, 16504 flow, removed 115 selfloop flow, removed 21 redundant places. [2023-09-01 14:42:15,038 INFO L231 Difference]: Finished difference. Result has 437 places, 669 transitions, 14286 flow [2023-09-01 14:42:15,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=12734, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=14286, PETRI_PLACES=437, PETRI_TRANSITIONS=669} [2023-09-01 14:42:15,039 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 416 predicate places. [2023-09-01 14:42:15,039 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 669 transitions, 14286 flow [2023-09-01 14:42:15,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 82.42553191489361) internal successors, (3874), 47 states have internal predecessors, (3874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:15,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:42:15,040 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:42:15,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-09-01 14:42:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-09-01 14:42:15,240 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:42:15,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:42:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1643787679, now seen corresponding path program 31 times [2023-09-01 14:42:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:42:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383547625] [2023-09-01 14:42:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:42:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:42:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:16,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:42:16,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383547625] [2023-09-01 14:42:16,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383547625] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:42:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677694379] [2023-09-01 14:42:16,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 14:42:16,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:42:16,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:42:16,573 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:42:16,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-09-01 14:42:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:16,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2023-09-01 14:42:16,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:42:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:42:17,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:42:17,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:17,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 133 treesize of output 122 [2023-09-01 14:42:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-09-01 14:42:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677694379] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:42:17,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:42:17,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 32 [2023-09-01 14:42:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594300718] [2023-09-01 14:42:17,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:42:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-09-01 14:42:17,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:42:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-09-01 14:42:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2023-09-01 14:42:21,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 249 [2023-09-01 14:42:21,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 669 transitions, 14286 flow. Second operand has 34 states, 34 states have (on average 89.6470588235294) internal successors, (3048), 34 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:21,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:42:21,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 249 [2023-09-01 14:42:21,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:42:26,161 INFO L130 PetriNetUnfolder]: 1682/3568 cut-off events. [2023-09-01 14:42:26,161 INFO L131 PetriNetUnfolder]: For 57993/57994 co-relation queries the response was YES. [2023-09-01 14:42:26,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31870 conditions, 3568 events. 1682/3568 cut-off events. For 57993/57994 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26531 event pairs, 428 based on Foata normal form. 6/3539 useless extension candidates. Maximal degree in co-relation 31714. Up to 2395 conditions per place. [2023-09-01 14:42:26,217 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 538 selfloop transitions, 266 changer transitions 37/842 dead transitions. [2023-09-01 14:42:26,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 842 transitions, 17634 flow [2023-09-01 14:42:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-09-01 14:42:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-09-01 14:42:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4636 transitions. [2023-09-01 14:42:26,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3723694779116466 [2023-09-01 14:42:26,222 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4636 transitions. [2023-09-01 14:42:26,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4636 transitions. [2023-09-01 14:42:26,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:42:26,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4636 transitions. [2023-09-01 14:42:26,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 92.72) internal successors, (4636), 50 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:26,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:26,236 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:26,237 INFO L175 Difference]: Start difference. First operand has 437 places, 669 transitions, 14286 flow. Second operand 50 states and 4636 transitions. [2023-09-01 14:42:26,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 842 transitions, 17634 flow [2023-09-01 14:42:26,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 842 transitions, 17059 flow, removed 140 selfloop flow, removed 30 redundant places. [2023-09-01 14:42:26,812 INFO L231 Difference]: Finished difference. Result has 465 places, 693 transitions, 14951 flow [2023-09-01 14:42:26,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13729, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=14951, PETRI_PLACES=465, PETRI_TRANSITIONS=693} [2023-09-01 14:42:26,813 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 444 predicate places. [2023-09-01 14:42:26,813 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 693 transitions, 14951 flow [2023-09-01 14:42:26,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 89.6470588235294) internal successors, (3048), 34 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:42:26,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:42:26,814 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:42:26,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-09-01 14:42:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-09-01 14:42:27,014 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-09-01 14:42:27,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:42:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash 700603901, now seen corresponding path program 32 times [2023-09-01 14:42:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:42:27,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830457015] [2023-09-01 14:42:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:42:27,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:42:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:42:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:28,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:42:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830457015] [2023-09-01 14:42:28,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830457015] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:42:28,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696469271] [2023-09-01 14:42:28,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:42:28,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:42:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:42:28,500 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:42:28,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-09-01 14:42:28,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:42:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:42:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 92 conjunts are in the unsatisfiable core [2023-09-01 14:42:28,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:42:28,761 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:42:28,819 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:42:28,893 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:42:28,952 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 14:42:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:42:29,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 40 [2023-09-01 14:42:29,914 INFO L321 Elim1Store]: treesize reduction 34, result has 47.7 percent of original size [2023-09-01 14:42:29,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 54 [2023-09-01 14:42:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:42:30,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:42:53,539 INFO L321 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-09-01 14:42:53,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 815 treesize of output 457 [2023-09-01 14:42:53,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:53,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1694 treesize of output 1776 [2023-09-01 14:42:54,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:54,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 833 treesize of output 886 [2023-09-01 14:42:54,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:54,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 777 treesize of output 730 [2023-09-01 14:42:54,603 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:54,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 740 treesize of output 892 [2023-09-01 14:42:54,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:54,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 649 treesize of output 702 [2023-09-01 14:42:54,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:42:54,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 593 treesize of output 546 Killed by 15