./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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/parallel-parallel-sum-1.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 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 19:40:26,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 19:40:26,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 19:40:26,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 19:40:26,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 19:40:26,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 19:40:26,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 19:40:26,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 19:40:26,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 19:40:26,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 19:40:26,982 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 19:40:26,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 19:40:26,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 19:40:26,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 19:40:26,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 19:40:26,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 19:40:26,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 19:40:26,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 19:40:26,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 19:40:26,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 19:40:26,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 19:40:26,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 19:40:27,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 19:40:27,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 19:40:27,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 19:40:27,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 19:40:27,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 19:40:27,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 19:40:27,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 19:40:27,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 19:40:27,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 19:40:27,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 19:40:27,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 19:40:27,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 19:40:27,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 19:40:27,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 19:40:27,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 19:40:27,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 19:40:27,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 19:40:27,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 19:40:27,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 19:40:27,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 19:40:27,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 19:40:27,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 19:40:27,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 19:40:27,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 19:40:27,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 19:40:27,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 19:40:27,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 19:40:27,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 19:40:27,035 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 19:40:27,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 19:40:27,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 19:40:27,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 19:40:27,037 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 19:40:27,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 19:40:27,037 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 19:40:27,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 19:40:27,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 19:40:27,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:40:27,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 19:40:27,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 19:40:27,039 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 19:40:27,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 19:40:27,039 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 19:40:27,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 19:40:27,039 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 19:40:27,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 19:40:27,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 19:40:27,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 19:40:27,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 19:40:27,285 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 19:40:27,285 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 19:40:27,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 19:40:28,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 19:40:28,345 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 19:40:28,346 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-30 19:40:28,351 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c12c9766/305b7f1791154ab785b445ffdc8b3eff/FLAGb15f94aac [2023-08-30 19:40:28,364 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c12c9766/305b7f1791154ab785b445ffdc8b3eff [2023-08-30 19:40:28,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 19:40:28,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 19:40:28,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 19:40:28,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 19:40:28,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 19:40:28,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689d2f8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28, skipping insertion in model container [2023-08-30 19:40:28,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 19:40:28,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 19:40:28,522 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 19:40:28,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:40:28,547 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 19:40:28,581 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/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-08-30 19:40:28,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 19:40:28,595 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:40:28,596 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 19:40:28,601 INFO L208 MainTranslator]: Completed translation [2023-08-30 19:40:28,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28 WrapperNode [2023-08-30 19:40:28,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 19:40:28,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 19:40:28,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 19:40:28,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 19:40:28,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,658 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 311 [2023-08-30 19:40:28,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 19:40:28,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 19:40:28,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 19:40:28,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 19:40:28,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 19:40:28,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 19:40:28,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 19:40:28,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 19:40:28,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (1/1) ... [2023-08-30 19:40:28,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 19:40:28,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:28,726 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) [2023-08-30 19:40:28,733 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 [2023-08-30 19:40:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 19:40:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 19:40:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 19:40:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 19:40:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 19:40:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 19:40:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 19:40:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 19:40:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 19:40:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 19:40:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-30 19:40:28,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-30 19:40:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 19:40:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 19:40:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 19:40:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 19:40:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 19:40:28,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 19:40:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 19:40:28,758 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 19:40:28,859 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 19:40:28,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 19:40:29,168 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 19:40:29,296 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 19:40:29,296 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-30 19:40:29,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:40:29 BoogieIcfgContainer [2023-08-30 19:40:29,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 19:40:29,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 19:40:29,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 19:40:29,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 19:40:29,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 07:40:28" (1/3) ... [2023-08-30 19:40:29,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3503edb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:40:29, skipping insertion in model container [2023-08-30 19:40:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 07:40:28" (2/3) ... [2023-08-30 19:40:29,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3503edb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 07:40:29, skipping insertion in model container [2023-08-30 19:40:29,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 07:40:29" (3/3) ... [2023-08-30 19:40:29,305 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-08-30 19:40:29,310 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 19:40:29,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 19:40:29,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 19:40:29,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 19:40:29,386 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 19:40:29,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2023-08-30 19:40:29,474 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2023-08-30 19:40:29,474 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:40:29,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 140 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-08-30 19:40:29,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2023-08-30 19:40:29,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 404 flow [2023-08-30 19:40:29,490 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 19:40:29,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 404 flow [2023-08-30 19:40:29,497 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 404 flow [2023-08-30 19:40:29,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 404 flow [2023-08-30 19:40:29,523 INFO L130 PetriNetUnfolder]: 15/190 cut-off events. [2023-08-30 19:40:29,523 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:40:29,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 190 events. 15/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-08-30 19:40:29,526 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-30 19:40:34,583 INFO L134 LiptonReduction]: Checked pairs total: 4288 [2023-08-30 19:40:34,584 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-30 19:40:34,600 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 19:40:34,605 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;@570e3ff, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 19:40:34,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-30 19:40:34,621 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-08-30 19:40:34,621 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 19:40:34,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:34,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:34,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:34,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:34,626 INFO L85 PathProgramCache]: Analyzing trace with hash 464994653, now seen corresponding path program 1 times [2023-08-30 19:40:34,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:34,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24018537] [2023-08-30 19:40:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:34,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:35,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:35,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24018537] [2023-08-30 19:40:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24018537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:40:35,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:40:35,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 19:40:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710703669] [2023-08-30 19:40:35,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:40:35,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 19:40:35,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 19:40:35,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 19:40:35,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-08-30 19:40:35,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:35,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-08-30 19:40:35,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:35,483 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2023-08-30 19:40:35,484 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-08-30 19:40:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9346 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2023-08-30 19:40:35,497 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-08-30 19:40:35,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2023-08-30 19:40:35,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 19:40:35,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 19:40:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-30 19:40:35,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2023-08-30 19:40:35,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-30 19:40:35,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-30 19:40:35,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:35,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-30 19:40:35,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,527 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 583 transitions. [2023-08-30 19:40:35,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2023-08-30 19:40:35,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 19:40:35,553 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2023-08-30 19:40:35,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-08-30 19:40:35,557 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-30 19:40:35,559 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2023-08-30 19:40:35,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:35,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:35,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 19:40:35,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:35,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1582094128, now seen corresponding path program 1 times [2023-08-30 19:40:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:35,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792276936] [2023-08-30 19:40:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:35,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792276936] [2023-08-30 19:40:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792276936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:40:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:40:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:40:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31069724] [2023-08-30 19:40:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:40:35,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:40:35,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:40:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:40:35,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-30 19:40:35,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:35,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:35,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-30 19:40:35,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:36,128 INFO L130 PetriNetUnfolder]: 2683/3652 cut-off events. [2023-08-30 19:40:36,129 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-08-30 19:40:36,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 3652 events. 2683/3652 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13796 event pairs, 1920 based on Foata normal form. 1/2761 useless extension candidates. Maximal degree in co-relation 2969. Up to 2594 conditions per place. [2023-08-30 19:40:36,138 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 34 selfloop transitions, 2 changer transitions 26/62 dead transitions. [2023-08-30 19:40:36,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 302 flow [2023-08-30 19:40:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:40:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:40:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 747 transitions. [2023-08-30 19:40:36,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466875 [2023-08-30 19:40:36,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 747 transitions. [2023-08-30 19:40:36,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 747 transitions. [2023-08-30 19:40:36,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:36,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 747 transitions. [2023-08-30 19:40:36,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 186.75) internal successors, (747), 4 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,145 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 747 transitions. [2023-08-30 19:40:36,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 302 flow [2023-08-30 19:40:36,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 19:40:36,147 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 116 flow [2023-08-30 19:40:36,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-30 19:40:36,148 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-30 19:40:36,148 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 116 flow [2023-08-30 19:40:36,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:36,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:36,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 19:40:36,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:36,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:36,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1000104662, now seen corresponding path program 1 times [2023-08-30 19:40:36,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:36,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265016512] [2023-08-30 19:40:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:36,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:36,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265016512] [2023-08-30 19:40:36,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265016512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 19:40:36,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 19:40:36,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 19:40:36,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983770314] [2023-08-30 19:40:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 19:40:36,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 19:40:36,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:36,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 19:40:36,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-30 19:40:36,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-08-30 19:40:36,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:36,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-08-30 19:40:36,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:36,772 INFO L130 PetriNetUnfolder]: 4054/5356 cut-off events. [2023-08-30 19:40:36,772 INFO L131 PetriNetUnfolder]: For 1510/1510 co-relation queries the response was YES. [2023-08-30 19:40:36,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 5356 events. 4054/5356 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21895 event pairs, 826 based on Foata normal form. 1/4625 useless extension candidates. Maximal degree in co-relation 13094. Up to 2129 conditions per place. [2023-08-30 19:40:36,792 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 84 selfloop transitions, 8 changer transitions 1/93 dead transitions. [2023-08-30 19:40:36,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 472 flow [2023-08-30 19:40:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 19:40:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 19:40:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-30 19:40:36,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488125 [2023-08-30 19:40:36,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-30 19:40:36,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-30 19:40:36,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:36,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-30 19:40:36,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,799 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,800 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 116 flow. Second operand 4 states and 781 transitions. [2023-08-30 19:40:36,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 472 flow [2023-08-30 19:40:36,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-30 19:40:36,802 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 174 flow [2023-08-30 19:40:36,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-08-30 19:40:36,803 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-30 19:40:36,803 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 174 flow [2023-08-30 19:40:36,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.25) internal successors, (725), 4 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:36,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:36,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:36,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 19:40:36,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:36,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1282271029, now seen corresponding path program 1 times [2023-08-30 19:40:36,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:36,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271929968] [2023-08-30 19:40:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271929968] [2023-08-30 19:40:36,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271929968] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618277789] [2023-08-30 19:40:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:36,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:36,988 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) [2023-08-30 19:40:37,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 19:40:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:37,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 19:40:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:37,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:37,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618277789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:37,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:37,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-08-30 19:40:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487565741] [2023-08-30 19:40:37,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-30 19:40:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-30 19:40:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-30 19:40:37,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 400 [2023-08-30 19:40:37,421 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:37,422 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:37,422 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 400 [2023-08-30 19:40:37,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:38,263 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2023-08-30 19:40:38,264 INFO L131 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2023-08-30 19:40:38,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 9086 events. 6835/9086 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39953 event pairs, 328 based on Foata normal form. 134/9220 useless extension candidates. Maximal degree in co-relation 24836. Up to 4607 conditions per place. [2023-08-30 19:40:38,304 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2023-08-30 19:40:38,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 185 transitions, 997 flow [2023-08-30 19:40:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 19:40:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 19:40:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2018 transitions. [2023-08-30 19:40:38,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586363636363636 [2023-08-30 19:40:38,308 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2018 transitions. [2023-08-30 19:40:38,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2018 transitions. [2023-08-30 19:40:38,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:38,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2018 transitions. [2023-08-30 19:40:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 183.45454545454547) internal successors, (2018), 11 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:38,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:38,318 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 174 flow. Second operand 11 states and 2018 transitions. [2023-08-30 19:40:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 185 transitions, 997 flow [2023-08-30 19:40:38,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-30 19:40:38,333 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2023-08-30 19:40:38,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-30 19:40:38,334 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-08-30 19:40:38,334 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2023-08-30 19:40:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 176.11111111111111) internal successors, (1585), 9 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:38,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:38,335 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:38,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:38,540 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 [2023-08-30 19:40:38,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:38,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1124719134, now seen corresponding path program 1 times [2023-08-30 19:40:38,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:38,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131769846] [2023-08-30 19:40:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:39,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131769846] [2023-08-30 19:40:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131769846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:39,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603999314] [2023-08-30 19:40:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:39,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:39,255 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) [2023-08-30 19:40:39,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 19:40:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:39,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 19:40:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:39,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-30 19:40:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:39,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:40:39,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603999314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:39,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:39,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-08-30 19:40:39,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223382332] [2023-08-30 19:40:39,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:39,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:40:39,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:40:39,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:40:40,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 400 [2023-08-30 19:40:40,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 352 flow. Second operand has 23 states, 23 states have (on average 156.6086956521739) internal successors, (3602), 23 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:40,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:40,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 400 [2023-08-30 19:40:40,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:45,504 INFO L130 PetriNetUnfolder]: 36653/48434 cut-off events. [2023-08-30 19:40:45,504 INFO L131 PetriNetUnfolder]: For 54698/54698 co-relation queries the response was YES. [2023-08-30 19:40:45,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147025 conditions, 48434 events. 36653/48434 cut-off events. For 54698/54698 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 265481 event pairs, 1658 based on Foata normal form. 322/48756 useless extension candidates. Maximal degree in co-relation 112987. Up to 14938 conditions per place. [2023-08-30 19:40:45,744 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 438 selfloop transitions, 273 changer transitions 51/762 dead transitions. [2023-08-30 19:40:45,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 762 transitions, 5071 flow [2023-08-30 19:40:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 19:40:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 19:40:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5931 transitions. [2023-08-30 19:40:45,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42364285714285715 [2023-08-30 19:40:45,755 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5931 transitions. [2023-08-30 19:40:45,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5931 transitions. [2023-08-30 19:40:45,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:45,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5931 transitions. [2023-08-30 19:40:45,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 169.45714285714286) internal successors, (5931), 35 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:45,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:45,780 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:45,780 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 35 states and 5931 transitions. [2023-08-30 19:40:45,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 762 transitions, 5071 flow [2023-08-30 19:40:45,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 762 transitions, 4739 flow, removed 165 selfloop flow, removed 2 redundant places. [2023-08-30 19:40:45,890 INFO L231 Difference]: Finished difference. Result has 113 places, 385 transitions, 3471 flow [2023-08-30 19:40:45,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3471, PETRI_PLACES=113, PETRI_TRANSITIONS=385} [2023-08-30 19:40:45,891 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-08-30 19:40:45,891 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 385 transitions, 3471 flow [2023-08-30 19:40:45,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 156.6086956521739) internal successors, (3602), 23 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:45,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:45,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:45,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:46,097 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 [2023-08-30 19:40:46,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:46,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1911556981, now seen corresponding path program 1 times [2023-08-30 19:40:46,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:46,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162008592] [2023-08-30 19:40:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:40:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:40:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162008592] [2023-08-30 19:40:46,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162008592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:40:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517059709] [2023-08-30 19:40:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:46,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:40:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:40:46,720 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) [2023-08-30 19:40:46,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 19:40:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:40:46,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-30 19:40:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:40:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:40:46,973 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 [2023-08-30 19:40:47,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:40:47,017 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 15 [2023-08-30 19:40:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:40:47,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:40:47,180 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_275 (Array Int Int))) (= (+ c_~t11~0 c_~s1~0) (+ c_~s2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_275) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))))) is different from false [2023-08-30 19:40:47,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-08-30 19:40:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:40:47,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517059709] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:40:47,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:40:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-08-30 19:40:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838604073] [2023-08-30 19:40:47,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:40:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 19:40:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:40:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 19:40:47,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=479, Unknown=6, NotChecked=44, Total=600 [2023-08-30 19:40:47,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-08-30 19:40:47,392 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 385 transitions, 3471 flow. Second operand has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:47,392 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:40:47,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-08-30 19:40:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:40:54,274 INFO L130 PetriNetUnfolder]: 41995/55463 cut-off events. [2023-08-30 19:40:54,274 INFO L131 PetriNetUnfolder]: For 248015/248015 co-relation queries the response was YES. [2023-08-30 19:40:54,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230637 conditions, 55463 events. 41995/55463 cut-off events. For 248015/248015 co-relation queries the response was YES. Maximal size of possible extension queue 1989. Compared 307169 event pairs, 7141 based on Foata normal form. 3/55466 useless extension candidates. Maximal degree in co-relation 203666. Up to 37297 conditions per place. [2023-08-30 19:40:54,750 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 521 selfloop transitions, 206 changer transitions 14/741 dead transitions. [2023-08-30 19:40:54,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 741 transitions, 7726 flow [2023-08-30 19:40:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 19:40:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 19:40:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2516 transitions. [2023-08-30 19:40:54,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-08-30 19:40:54,757 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2516 transitions. [2023-08-30 19:40:54,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2516 transitions. [2023-08-30 19:40:54,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:40:54,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2516 transitions. [2023-08-30 19:40:54,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.0) internal successors, (2516), 17 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:54,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:54,770 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:54,770 INFO L175 Difference]: Start difference. First operand has 113 places, 385 transitions, 3471 flow. Second operand 17 states and 2516 transitions. [2023-08-30 19:40:54,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 741 transitions, 7726 flow [2023-08-30 19:40:59,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 741 transitions, 7376 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-08-30 19:40:59,270 INFO L231 Difference]: Finished difference. Result has 134 places, 544 transitions, 5484 flow [2023-08-30 19:40:59,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5484, PETRI_PLACES=134, PETRI_TRANSITIONS=544} [2023-08-30 19:40:59,271 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-08-30 19:40:59,271 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 544 transitions, 5484 flow [2023-08-30 19:40:59,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:40:59,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:40:59,272 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:40:59,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 19:40:59,473 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 [2023-08-30 19:40:59,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:40:59,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:40:59,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1439824054, now seen corresponding path program 1 times [2023-08-30 19:40:59,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:40:59,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045850818] [2023-08-30 19:40:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:40:59,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:40:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045850818] [2023-08-30 19:41:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045850818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031651282] [2023-08-30 19:41:00,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:00,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:00,356 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) [2023-08-30 19:41:00,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 19:41:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-30 19:41:00,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:41:00,694 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 [2023-08-30 19:41:00,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:41:00,754 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 [2023-08-30 19:41:00,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:41:00,803 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 21 treesize of output 15 [2023-08-30 19:41:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:00,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:01,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-08-30 19:41:01,242 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 75 treesize of output 61 [2023-08-30 19:41:01,246 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 35 treesize of output 28 [2023-08-30 19:41:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:01,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031651282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:01,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:01,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-30 19:41:01,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736739931] [2023-08-30 19:41:01,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:01,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 19:41:01,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:01,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 19:41:01,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=804, Unknown=4, NotChecked=0, Total=930 [2023-08-30 19:41:02,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-08-30 19:41:02,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 544 transitions, 5484 flow. Second operand has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:02,511 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:02,511 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-08-30 19:41:02,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:19,897 INFO L130 PetriNetUnfolder]: 62211/82163 cut-off events. [2023-08-30 19:41:19,898 INFO L131 PetriNetUnfolder]: For 425215/425215 co-relation queries the response was YES. [2023-08-30 19:41:20,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349531 conditions, 82163 events. 62211/82163 cut-off events. For 425215/425215 co-relation queries the response was YES. Maximal size of possible extension queue 3075. Compared 478713 event pairs, 5710 based on Foata normal form. 12/82175 useless extension candidates. Maximal degree in co-relation 349465. Up to 44572 conditions per place. [2023-08-30 19:41:20,686 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1027 selfloop transitions, 751 changer transitions 44/1822 dead transitions. [2023-08-30 19:41:20,686 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1822 transitions, 18693 flow [2023-08-30 19:41:20,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-30 19:41:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-30 19:41:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 8331 transitions. [2023-08-30 19:41:20,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3530084745762712 [2023-08-30 19:41:20,698 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 8331 transitions. [2023-08-30 19:41:20,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 8331 transitions. [2023-08-30 19:41:20,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:41:20,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 8331 transitions. [2023-08-30 19:41:20,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 141.20338983050848) internal successors, (8331), 59 states have internal predecessors, (8331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:20,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 400.0) internal successors, (24000), 60 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:20,731 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 400.0) internal successors, (24000), 60 states have internal predecessors, (24000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:20,732 INFO L175 Difference]: Start difference. First operand has 134 places, 544 transitions, 5484 flow. Second operand 59 states and 8331 transitions. [2023-08-30 19:41:20,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1822 transitions, 18693 flow [2023-08-30 19:41:30,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1822 transitions, 18219 flow, removed 171 selfloop flow, removed 6 redundant places. [2023-08-30 19:41:30,019 INFO L231 Difference]: Finished difference. Result has 210 places, 1223 transitions, 15224 flow [2023-08-30 19:41:30,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=15224, PETRI_PLACES=210, PETRI_TRANSITIONS=1223} [2023-08-30 19:41:30,021 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 171 predicate places. [2023-08-30 19:41:30,021 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 1223 transitions, 15224 flow [2023-08-30 19:41:30,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:30,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:41:30,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:41:30,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-30 19:41:30,226 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 [2023-08-30 19:41:30,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:41:30,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:41:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1615068153, now seen corresponding path program 1 times [2023-08-30 19:41:30,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:41:30,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963936730] [2023-08-30 19:41:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:30,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:41:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:41:30,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:41:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963936730] [2023-08-30 19:41:30,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963936730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:41:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048165234] [2023-08-30 19:41:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:41:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:41:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:41:30,873 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) [2023-08-30 19:41:30,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 19:41:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:41:30,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-30 19:41:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:41:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:41:31,283 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 14 treesize of output 16 [2023-08-30 19:41:31,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-30 19:41:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:31,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:41:31,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-30 19:41:31,639 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 56 treesize of output 35 [2023-08-30 19:41:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:41:31,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048165234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:41:31,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:41:31,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-30 19:41:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469945739] [2023-08-30 19:41:31,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:41:31,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 19:41:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:41:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 19:41:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=576, Unknown=1, NotChecked=0, Total=702 [2023-08-30 19:41:32,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-08-30 19:41:32,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 1223 transitions, 15224 flow. Second operand has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:41:32,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:41:32,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-08-30 19:41:32,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:41:59,695 INFO L130 PetriNetUnfolder]: 97170/128515 cut-off events. [2023-08-30 19:41:59,696 INFO L131 PetriNetUnfolder]: For 890176/890176 co-relation queries the response was YES. [2023-08-30 19:42:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627351 conditions, 128515 events. 97170/128515 cut-off events. For 890176/890176 co-relation queries the response was YES. Maximal size of possible extension queue 4144. Compared 782575 event pairs, 12146 based on Foata normal form. 410/128925 useless extension candidates. Maximal degree in co-relation 620228. Up to 59622 conditions per place. [2023-08-30 19:42:01,643 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 2049 selfloop transitions, 820 changer transitions 98/2967 dead transitions. [2023-08-30 19:42:01,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 2967 transitions, 36802 flow [2023-08-30 19:42:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-30 19:42:01,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-30 19:42:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 11294 transitions. [2023-08-30 19:42:01,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715131578947368 [2023-08-30 19:42:01,652 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 11294 transitions. [2023-08-30 19:42:01,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 11294 transitions. [2023-08-30 19:42:01,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:42:01,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 11294 transitions. [2023-08-30 19:42:01,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 148.60526315789474) internal successors, (11294), 76 states have internal predecessors, (11294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 400.0) internal successors, (30800), 77 states have internal predecessors, (30800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,682 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 400.0) internal successors, (30800), 77 states have internal predecessors, (30800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:01,682 INFO L175 Difference]: Start difference. First operand has 210 places, 1223 transitions, 15224 flow. Second operand 76 states and 11294 transitions. [2023-08-30 19:42:01,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 2967 transitions, 36802 flow [2023-08-30 19:42:40,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 2967 transitions, 32212 flow, removed 2160 selfloop flow, removed 10 redundant places. [2023-08-30 19:42:40,923 INFO L231 Difference]: Finished difference. Result has 303 places, 1919 transitions, 24009 flow [2023-08-30 19:42:40,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=12920, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=912, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=24009, PETRI_PLACES=303, PETRI_TRANSITIONS=1919} [2023-08-30 19:42:40,924 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 264 predicate places. [2023-08-30 19:42:40,924 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 1919 transitions, 24009 flow [2023-08-30 19:42:40,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 135.07407407407408) internal successors, (3647), 27 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:40,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:42:40,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:42:40,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-30 19:42:41,130 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 [2023-08-30 19:42:41,130 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:42:41,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:42:41,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2074877216, now seen corresponding path program 2 times [2023-08-30 19:42:41,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:42:41,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350291669] [2023-08-30 19:42:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:42:41,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:42:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:42:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:42:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:42:41,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350291669] [2023-08-30 19:42:41,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350291669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:42:41,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833796514] [2023-08-30 19:42:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:42:41,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:42:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:42:41,487 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) [2023-08-30 19:42:41,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 19:42:41,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:42:41,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:42:41,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 19:42:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:42:41,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-30 19:42:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:42:41,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:42:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:42:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833796514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:42:42,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:42:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2023-08-30 19:42:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788571691] [2023-08-30 19:42:42,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:42:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 19:42:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:42:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 19:42:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-30 19:42:42,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 400 [2023-08-30 19:42:42,546 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 1919 transitions, 24009 flow. Second operand has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:42:42,546 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:42:42,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 400 [2023-08-30 19:42:42,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:43:20,600 INFO L130 PetriNetUnfolder]: 122775/162198 cut-off events. [2023-08-30 19:43:20,600 INFO L131 PetriNetUnfolder]: For 972275/972275 co-relation queries the response was YES. [2023-08-30 19:43:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803058 conditions, 162198 events. 122775/162198 cut-off events. For 972275/972275 co-relation queries the response was YES. Maximal size of possible extension queue 5484. Compared 1013370 event pairs, 16847 based on Foata normal form. 19/162217 useless extension candidates. Maximal degree in co-relation 798707. Up to 128866 conditions per place. [2023-08-30 19:43:24,286 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 1732 selfloop transitions, 1294 changer transitions 11/3037 dead transitions. [2023-08-30 19:43:24,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 3037 transitions, 42900 flow [2023-08-30 19:43:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:43:24,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:43:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4693 transitions. [2023-08-30 19:43:24,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41901785714285716 [2023-08-30 19:43:24,290 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4693 transitions. [2023-08-30 19:43:24,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4693 transitions. [2023-08-30 19:43:24,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:43:24,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4693 transitions. [2023-08-30 19:43:24,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 167.60714285714286) internal successors, (4693), 28 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:24,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:24,301 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:43:24,301 INFO L175 Difference]: Start difference. First operand has 303 places, 1919 transitions, 24009 flow. Second operand 28 states and 4693 transitions. [2023-08-30 19:43:24,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 3037 transitions, 42900 flow [2023-08-30 19:44:19,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 3037 transitions, 37804 flow, removed 2358 selfloop flow, removed 8 redundant places. [2023-08-30 19:44:19,137 INFO L231 Difference]: Finished difference. Result has 339 places, 2722 transitions, 35067 flow [2023-08-30 19:44:19,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=20536, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=643, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=35067, PETRI_PLACES=339, PETRI_TRANSITIONS=2722} [2023-08-30 19:44:19,139 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 300 predicate places. [2023-08-30 19:44:19,139 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 2722 transitions, 35067 flow [2023-08-30 19:44:19,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 155.9047619047619) internal successors, (3274), 21 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:19,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:44:19,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:44:19,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 19:44:19,344 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 [2023-08-30 19:44:19,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:44:19,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:44:19,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1844979306, now seen corresponding path program 2 times [2023-08-30 19:44:19,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:44:19,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499087639] [2023-08-30 19:44:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:44:19,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:44:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:44:19,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:44:19,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:44:19,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499087639] [2023-08-30 19:44:19,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499087639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:44:19,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204106417] [2023-08-30 19:44:19,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:44:19,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:44:19,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:44:19,938 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) [2023-08-30 19:44:19,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 19:44:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:44:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:44:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-30 19:44:20,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:44:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:44:20,185 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 [2023-08-30 19:44:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:44:20,227 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 [2023-08-30 19:44:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 19:44:20,301 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 [2023-08-30 19:44:20,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:44:20,323 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 15 [2023-08-30 19:44:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:44:20,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:44:20,523 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_537 (Array Int Int)) (v_ArrVal_536 (Array Int Int))) (= (+ c_~t11~0 c_~s1~0) (+ c_~s2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_536) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_537) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))))) is different from false [2023-08-30 19:44:24,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 164 [2023-08-30 19:44:24,666 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 86 treesize of output 80 [2023-08-30 19:44:24,669 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 158 treesize of output 134 [2023-08-30 19:44:24,671 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 134 treesize of output 122 [2023-08-30 19:44:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:44:24,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204106417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:44:24,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:44:24,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2023-08-30 19:44:24,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122050878] [2023-08-30 19:44:24,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:44:24,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-30 19:44:24,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:44:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-30 19:44:24,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=646, Unknown=12, NotChecked=52, Total=812 [2023-08-30 19:44:24,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-08-30 19:44:24,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 2722 transitions, 35067 flow. Second operand has 29 states, 29 states have (on average 128.48275862068965) internal successors, (3726), 29 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:44:24,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:44:24,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-08-30 19:44:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:44:45,220 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (and (= (+ c_~n~0 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (or (and (not (= |c_ULTIMATE.start_main_~#t4~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 2)) (<= .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base|) (<= |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 2) (<= .cse0 |c_ULTIMATE.start_main_~#t4~0#1.base|) (forall ((v_ArrVal_537 (Array Int Int))) (= (+ c_~s2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_537) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))) c_~s1~0)) (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (<= .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|))) is different from false [2023-08-30 19:44:58,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 19:45:45,853 WARN L222 SmtUtils]: Spent 8.20s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-30 19:46:07,082 INFO L130 PetriNetUnfolder]: 146353/193549 cut-off events. [2023-08-30 19:46:07,082 INFO L131 PetriNetUnfolder]: For 1239277/1239277 co-relation queries the response was YES. [2023-08-30 19:46:11,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014579 conditions, 193549 events. 146353/193549 cut-off events. For 1239277/1239277 co-relation queries the response was YES. Maximal size of possible extension queue 6584. Compared 1235493 event pairs, 20037 based on Foata normal form. 1097/194646 useless extension candidates. Maximal degree in co-relation 1009627. Up to 74114 conditions per place. [2023-08-30 19:46:12,442 INFO L137 encePairwiseOnDemand]: 379/400 looper letters, 2680 selfloop transitions, 1722 changer transitions 22/4424 dead transitions. [2023-08-30 19:46:12,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 4424 transitions, 61558 flow [2023-08-30 19:46:12,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 19:46:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 19:46:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 10096 transitions. [2023-08-30 19:46:12,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35055555555555556 [2023-08-30 19:46:12,451 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 10096 transitions. [2023-08-30 19:46:12,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 10096 transitions. [2023-08-30 19:46:12,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:46:12,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 10096 transitions. [2023-08-30 19:46:12,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 140.22222222222223) internal successors, (10096), 72 states have internal predecessors, (10096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:12,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 400.0) internal successors, (29200), 73 states have internal predecessors, (29200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:12,475 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 400.0) internal successors, (29200), 73 states have internal predecessors, (29200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:46:12,476 INFO L175 Difference]: Start difference. First operand has 339 places, 2722 transitions, 35067 flow. Second operand 72 states and 10096 transitions. [2023-08-30 19:46:12,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 4424 transitions, 61558 flow [2023-08-30 19:47:33,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 4424 transitions, 59720 flow, removed 898 selfloop flow, removed 7 redundant places. [2023-08-30 19:47:33,794 INFO L231 Difference]: Finished difference. Result has 432 places, 3773 transitions, 52944 flow [2023-08-30 19:47:33,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=32759, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=741, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=52944, PETRI_PLACES=432, PETRI_TRANSITIONS=3773} [2023-08-30 19:47:33,797 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 393 predicate places. [2023-08-30 19:47:33,797 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 3773 transitions, 52944 flow [2023-08-30 19:47:33,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 128.48275862068965) internal successors, (3726), 29 states have internal predecessors, (3726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:33,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:47:33,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:47:33,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 19:47:34,002 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 [2023-08-30 19:47:34,002 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:47:34,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:47:34,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1582268893, now seen corresponding path program 2 times [2023-08-30 19:47:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:47:34,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726027741] [2023-08-30 19:47:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:47:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:47:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:47:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:47:34,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:47:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726027741] [2023-08-30 19:47:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726027741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:47:34,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262556194] [2023-08-30 19:47:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 19:47:34,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:47:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:47:34,567 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) [2023-08-30 19:47:34,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 19:47:34,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 19:47:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:47:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-30 19:47:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:47:34,791 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 13 treesize of output 9 [2023-08-30 19:47:34,864 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 [2023-08-30 19:47:34,952 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 [2023-08-30 19:47:35,064 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 [2023-08-30 19:47:35,134 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 [2023-08-30 19:47:35,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-08-30 19:47:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 19:47:35,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:47:35,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:47:35,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262556194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:47:35,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:47:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 5] total 22 [2023-08-30 19:47:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523791346] [2023-08-30 19:47:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:47:35,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 19:47:35,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:47:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 19:47:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-30 19:47:36,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 400 [2023-08-30 19:47:36,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 3773 transitions, 52944 flow. Second operand has 23 states, 23 states have (on average 150.56521739130434) internal successors, (3463), 23 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:47:36,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:47:36,404 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 400 [2023-08-30 19:47:36,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:48:57,333 INFO L130 PetriNetUnfolder]: 160283/211843 cut-off events. [2023-08-30 19:48:57,334 INFO L131 PetriNetUnfolder]: For 1804711/1804711 co-relation queries the response was YES. [2023-08-30 19:49:03,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375746 conditions, 211843 events. 160283/211843 cut-off events. For 1804711/1804711 co-relation queries the response was YES. Maximal size of possible extension queue 7091. Compared 1361466 event pairs, 25071 based on Foata normal form. 12/211855 useless extension candidates. Maximal degree in co-relation 1373638. Up to 187157 conditions per place. [2023-08-30 19:49:04,733 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 3357 selfloop transitions, 1189 changer transitions 8/4554 dead transitions. [2023-08-30 19:49:04,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 4554 transitions, 72155 flow [2023-08-30 19:49:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-30 19:49:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-30 19:49:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4498 transitions. [2023-08-30 19:49:04,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016071428571429 [2023-08-30 19:49:04,736 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4498 transitions. [2023-08-30 19:49:04,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4498 transitions. [2023-08-30 19:49:04,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:49:04,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4498 transitions. [2023-08-30 19:49:04,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 160.64285714285714) internal successors, (4498), 28 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:04,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:04,746 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 400.0) internal successors, (11600), 29 states have internal predecessors, (11600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:49:04,746 INFO L175 Difference]: Start difference. First operand has 432 places, 3773 transitions, 52944 flow. Second operand 28 states and 4498 transitions. [2023-08-30 19:49:04,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 4554 transitions, 72155 flow [2023-08-30 19:50:27,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 4554 transitions, 67271 flow, removed 2437 selfloop flow, removed 3 redundant places. [2023-08-30 19:50:27,486 INFO L231 Difference]: Finished difference. Result has 470 places, 4327 transitions, 60966 flow [2023-08-30 19:50:27,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=48074, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=725, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2909, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=60966, PETRI_PLACES=470, PETRI_TRANSITIONS=4327} [2023-08-30 19:50:27,489 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 431 predicate places. [2023-08-30 19:50:27,489 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 4327 transitions, 60966 flow [2023-08-30 19:50:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 150.56521739130434) internal successors, (3463), 23 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:27,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 19:50:27,490 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 19:50:27,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-30 19:50:27,696 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 [2023-08-30 19:50:27,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-30 19:50:27,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 19:50:27,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1337249533, now seen corresponding path program 3 times [2023-08-30 19:50:27,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 19:50:27,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731157283] [2023-08-30 19:50:27,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 19:50:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 19:50:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 19:50:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:50:28,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 19:50:28,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731157283] [2023-08-30 19:50:28,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731157283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 19:50:28,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829073685] [2023-08-30 19:50:28,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 19:50:28,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 19:50:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 19:50:28,070 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) [2023-08-30 19:50:28,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 19:50:28,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 19:50:28,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 19:50:28,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-30 19:50:28,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 19:50:28,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 19:50:28,321 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 15 [2023-08-30 19:50:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 19:50:28,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 19:50:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 19:50:28,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829073685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 19:50:28,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 19:50:28,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 16 [2023-08-30 19:50:28,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387818036] [2023-08-30 19:50:28,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 19:50:28,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 19:50:28,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 19:50:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 19:50:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-08-30 19:50:28,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2023-08-30 19:50:28,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 4327 transitions, 60966 flow. Second operand has 17 states, 17 states have (on average 160.2941176470588) internal successors, (2725), 17 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:50:28,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 19:50:28,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2023-08-30 19:50:28,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 19:52:03,955 INFO L130 PetriNetUnfolder]: 169585/224021 cut-off events. [2023-08-30 19:52:03,955 INFO L131 PetriNetUnfolder]: For 1893167/1893167 co-relation queries the response was YES. [2023-08-30 19:52:11,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483923 conditions, 224021 events. 169585/224021 cut-off events. For 1893167/1893167 co-relation queries the response was YES. Maximal size of possible extension queue 7492. Compared 1445283 event pairs, 17115 based on Foata normal form. 6/224027 useless extension candidates. Maximal degree in co-relation 1482201. Up to 199215 conditions per place. [2023-08-30 19:52:12,686 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 3852 selfloop transitions, 1088 changer transitions 20/4960 dead transitions. [2023-08-30 19:52:12,687 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 4960 transitions, 79681 flow [2023-08-30 19:52:12,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 19:52:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 19:52:12,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 4430 transitions. [2023-08-30 19:52:12,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42596153846153845 [2023-08-30 19:52:12,690 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 4430 transitions. [2023-08-30 19:52:12,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 4430 transitions. [2023-08-30 19:52:12,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 19:52:12,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 4430 transitions. [2023-08-30 19:52:12,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 170.3846153846154) internal successors, (4430), 26 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:12,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 400.0) internal successors, (10800), 27 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:12,699 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 400.0) internal successors, (10800), 27 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 19:52:12,699 INFO L175 Difference]: Start difference. First operand has 470 places, 4327 transitions, 60966 flow. Second operand 26 states and 4430 transitions. [2023-08-30 19:52:12,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 4960 transitions, 79681 flow Killed by 15