./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 TOGETHER --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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-31 01:59:45,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-31 01:59:45,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-31 01:59:45,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-31 01:59:45,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-31 01:59:45,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-31 01:59:45,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-31 01:59:45,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-31 01:59:45,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-31 01:59:45,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-31 01:59:45,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-31 01:59:45,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-31 01:59:45,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-31 01:59:45,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-31 01:59:45,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-31 01:59:45,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-31 01:59:45,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-31 01:59:45,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-31 01:59:45,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-31 01:59:45,373 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-31 01:59:45,374 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-31 01:59:45,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-31 01:59:45,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-31 01:59:45,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-31 01:59:45,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-31 01:59:45,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-31 01:59:45,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-31 01:59:45,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-31 01:59:45,386 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-31 01:59:45,387 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-31 01:59:45,387 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-31 01:59:45,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-31 01:59:45,390 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-31 01:59:45,390 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-31 01:59:45,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-31 01:59:45,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-31 01:59:45,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-31 01:59:45,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-31 01:59:45,392 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-31 01:59:45,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-31 01:59:45,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-31 01:59:45,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-31 01:59:45,424 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-31 01:59:45,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-31 01:59:45,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-31 01:59:45,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-31 01:59:45,427 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-31 01:59:45,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-31 01:59:45,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-31 01:59:45,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-31 01:59:45,428 INFO L138 SettingsManager]: * Use SBE=true [2023-08-31 01:59:45,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-31 01:59:45,429 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-31 01:59:45,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-31 01:59:45,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-31 01:59:45,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-31 01:59:45,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-31 01:59:45,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-31 01:59:45,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-31 01:59:45,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-31 01:59:45,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-31 01:59:45,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:59:45,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-31 01:59:45,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-31 01:59:45,433 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-31 01:59:45,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-31 01:59:45,433 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-31 01:59:45,433 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-31 01:59:45,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-31 01:59:45,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-31 01:59:45,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-31 01:59:45,740 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-31 01:59:45,741 INFO L275 PluginConnector]: CDTParser initialized [2023-08-31 01:59:45,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-31 01:59:46,894 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-31 01:59:47,094 INFO L351 CDTParser]: Found 1 translation units. [2023-08-31 01:59:47,095 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-08-31 01:59:47,101 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f998ab3/2a4e95dbe12c4544ab6dc19b4022cb3c/FLAGacca48829 [2023-08-31 01:59:47,112 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f998ab3/2a4e95dbe12c4544ab6dc19b4022cb3c [2023-08-31 01:59:47,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-31 01:59:47,115 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-31 01:59:47,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-31 01:59:47,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-31 01:59:47,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-31 01:59:47,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757557ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47, skipping insertion in model container [2023-08-31 01:59:47,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-31 01:59:47,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-31 01:59:47,355 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] [2023-08-31 01:59:47,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:59:47,382 INFO L203 MainTranslator]: Completed pre-run [2023-08-31 01:59:47,416 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] [2023-08-31 01:59:47,432 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-31 01:59:47,441 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:59:47,443 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-31 01:59:47,448 INFO L208 MainTranslator]: Completed translation [2023-08-31 01:59:47,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47 WrapperNode [2023-08-31 01:59:47,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-31 01:59:47,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-31 01:59:47,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-31 01:59:47,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-31 01:59:47,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,534 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 311 [2023-08-31 01:59:47,539 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-31 01:59:47,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-31 01:59:47,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-31 01:59:47,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-31 01:59:47,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,618 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-31 01:59:47,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-31 01:59:47,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-31 01:59:47,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-31 01:59:47,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (1/1) ... [2023-08-31 01:59:47,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-31 01:59:47,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:59:47,662 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) [2023-08-31 01:59:47,690 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 [2023-08-31 01:59:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-31 01:59:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-31 01:59:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-31 01:59:47,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-31 01:59:47,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-31 01:59:47,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-31 01:59:47,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-31 01:59:47,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-31 01:59:47,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-31 01:59:47,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-31 01:59:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-31 01:59:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-31 01:59:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-31 01:59:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-31 01:59:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-31 01:59:47,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-31 01:59:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-31 01:59:47,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-31 01:59:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-31 01:59:47,711 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-31 01:59:47,870 INFO L236 CfgBuilder]: Building ICFG [2023-08-31 01:59:47,872 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-31 01:59:48,347 INFO L277 CfgBuilder]: Performing block encoding [2023-08-31 01:59:48,475 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-31 01:59:48,475 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-31 01:59:48,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:59:48 BoogieIcfgContainer [2023-08-31 01:59:48,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-31 01:59:48,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-31 01:59:48,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-31 01:59:48,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-31 01:59:48,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.08 01:59:47" (1/3) ... [2023-08-31 01:59:48,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54efbf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:59:48, skipping insertion in model container [2023-08-31 01:59:48,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.08 01:59:47" (2/3) ... [2023-08-31 01:59:48,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54efbf52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.08 01:59:48, skipping insertion in model container [2023-08-31 01:59:48,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.08 01:59:48" (3/3) ... [2023-08-31 01:59:48,484 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-08-31 01:59:48,491 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-31 01:59:48,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-31 01:59:48,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-31 01:59:48,499 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-31 01:59:48,556 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-31 01:59:48,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2023-08-31 01:59:48,658 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2023-08-31 01:59:48,659 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 01:59:48,665 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. [2023-08-31 01:59:48,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2023-08-31 01:59:48,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 404 flow [2023-08-31 01:59:48,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-31 01:59:48,680 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 404 flow [2023-08-31 01:59:48,683 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 404 flow [2023-08-31 01:59:48,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 404 flow [2023-08-31 01:59:48,719 INFO L130 PetriNetUnfolder]: 15/190 cut-off events. [2023-08-31 01:59:48,719 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 01:59:48,720 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. [2023-08-31 01:59:48,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-08-31 01:59:54,908 INFO L134 LiptonReduction]: Checked pairs total: 4288 [2023-08-31 01:59:54,908 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-08-31 01:59:54,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-31 01:59:54,933 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;@60ff6adc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-31 01:59:54,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-31 01:59:54,942 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-08-31 01:59:54,942 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-31 01:59:54,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:54,943 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] [2023-08-31 01:59:54,943 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)] === [2023-08-31 01:59:54,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 464994653, now seen corresponding path program 1 times [2023-08-31 01:59:54,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:54,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72172247] [2023-08-31 01:59:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:54,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:55,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:55,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72172247] [2023-08-31 01:59:55,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72172247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:59:55,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:59:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-31 01:59:55,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006782819] [2023-08-31 01:59:55,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:59:55,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-31 01:59:55,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:55,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-31 01:59:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-31 01:59:55,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-08-31 01:59:55,717 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) [2023-08-31 01:59:55,718 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:55,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-08-31 01:59:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:56,137 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2023-08-31 01:59:56,137 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-08-31 01:59:56,143 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. [2023-08-31 01:59:56,157 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-08-31 01:59:56,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2023-08-31 01:59:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-31 01:59:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-31 01:59:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-31 01:59:56,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48583333333333334 [2023-08-31 01:59:56,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-31 01:59:56,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-31 01:59:56,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:56,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-31 01:59:56,189 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) [2023-08-31 01:59:56,195 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) [2023-08-31 01:59:56,196 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) [2023-08-31 01:59:56,198 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 583 transitions. [2023-08-31 01:59:56,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2023-08-31 01:59:56,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-31 01:59:56,208 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2023-08-31 01:59:56,210 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} [2023-08-31 01:59:56,213 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-31 01:59:56,216 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2023-08-31 01:59:56,217 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) [2023-08-31 01:59:56,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:56,218 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] [2023-08-31 01:59:56,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-31 01:59:56,219 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)] === [2023-08-31 01:59:56,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1582094128, now seen corresponding path program 1 times [2023-08-31 01:59:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:56,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009055267] [2023-08-31 01:59:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:56,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:56,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:56,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009055267] [2023-08-31 01:59:56,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009055267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:59:56,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:59:56,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:59:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131428020] [2023-08-31 01:59:56,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:59:56,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:59:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:59:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:59:56,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 400 [2023-08-31 01:59:56,573 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) [2023-08-31 01:59:56,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:56,573 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 400 [2023-08-31 01:59:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:57,018 INFO L130 PetriNetUnfolder]: 2683/3652 cut-off events. [2023-08-31 01:59:57,019 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-08-31 01:59:57,022 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. [2023-08-31 01:59:57,034 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 34 selfloop transitions, 2 changer transitions 26/62 dead transitions. [2023-08-31 01:59:57,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 302 flow [2023-08-31 01:59:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:59:57,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:59:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 747 transitions. [2023-08-31 01:59:57,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466875 [2023-08-31 01:59:57,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 747 transitions. [2023-08-31 01:59:57,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 747 transitions. [2023-08-31 01:59:57,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:57,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 747 transitions. [2023-08-31 01:59:57,040 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) [2023-08-31 01:59:57,043 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) [2023-08-31 01:59:57,044 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) [2023-08-31 01:59:57,044 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 747 transitions. [2023-08-31 01:59:57,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 302 flow [2023-08-31 01:59:57,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-31 01:59:57,048 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 116 flow [2023-08-31 01:59:57,049 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} [2023-08-31 01:59:57,049 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-08-31 01:59:57,050 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 116 flow [2023-08-31 01:59:57,050 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) [2023-08-31 01:59:57,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:57,050 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] [2023-08-31 01:59:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-31 01:59:57,051 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)] === [2023-08-31 01:59:57,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1000104662, now seen corresponding path program 1 times [2023-08-31 01:59:57,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793394533] [2023-08-31 01:59:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:57,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:59:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793394533] [2023-08-31 01:59:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793394533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-31 01:59:57,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-31 01:59:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-31 01:59:57,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794355442] [2023-08-31 01:59:57,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-31 01:59:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-31 01:59:57,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:57,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-31 01:59:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-31 01:59:57,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 400 [2023-08-31 01:59:57,323 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) [2023-08-31 01:59:57,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:57,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 400 [2023-08-31 01:59:57,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:57,904 INFO L130 PetriNetUnfolder]: 4054/5356 cut-off events. [2023-08-31 01:59:57,905 INFO L131 PetriNetUnfolder]: For 1510/1510 co-relation queries the response was YES. [2023-08-31 01:59:57,911 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. [2023-08-31 01:59:57,931 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 84 selfloop transitions, 8 changer transitions 1/93 dead transitions. [2023-08-31 01:59:57,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 472 flow [2023-08-31 01:59:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-31 01:59:57,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-31 01:59:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-08-31 01:59:57,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.488125 [2023-08-31 01:59:57,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-08-31 01:59:57,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-08-31 01:59:57,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 01:59:57,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-08-31 01:59:57,937 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) [2023-08-31 01:59:57,940 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) [2023-08-31 01:59:57,941 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) [2023-08-31 01:59:57,941 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 116 flow. Second operand 4 states and 781 transitions. [2023-08-31 01:59:57,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 472 flow [2023-08-31 01:59:57,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-31 01:59:57,945 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 174 flow [2023-08-31 01:59:57,945 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} [2023-08-31 01:59:57,945 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-31 01:59:57,946 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 174 flow [2023-08-31 01:59:57,946 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) [2023-08-31 01:59:57,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 01:59:57,947 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] [2023-08-31 01:59:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-31 01:59:57,947 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)] === [2023-08-31 01:59:57,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 01:59:57,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1282271029, now seen corresponding path program 1 times [2023-08-31 01:59:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 01:59:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598275001] [2023-08-31 01:59:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 01:59:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 01:59:58,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 01:59:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598275001] [2023-08-31 01:59:58,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598275001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 01:59:58,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572003607] [2023-08-31 01:59:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 01:59:58,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 01:59:58,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 01:59:58,261 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) [2023-08-31 01:59:58,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-31 01:59:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 01:59:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-31 01:59:58,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 01:59:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:59:58,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 01:59:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 01:59:58,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572003607] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 01:59:58,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 01:59:58,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-08-31 01:59:58,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807702790] [2023-08-31 01:59:58,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 01:59:58,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-31 01:59:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 01:59:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-31 01:59:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-31 01:59:58,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 400 [2023-08-31 01:59:58,835 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) [2023-08-31 01:59:58,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 01:59:58,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 400 [2023-08-31 01:59:58,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 01:59:59,998 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2023-08-31 01:59:59,998 INFO L131 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2023-08-31 02:00:00,013 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. [2023-08-31 02:00:00,050 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2023-08-31 02:00:00,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 185 transitions, 997 flow [2023-08-31 02:00:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-31 02:00:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-31 02:00:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2018 transitions. [2023-08-31 02:00:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4586363636363636 [2023-08-31 02:00:00,055 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2018 transitions. [2023-08-31 02:00:00,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2018 transitions. [2023-08-31 02:00:00,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:00:00,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2018 transitions. [2023-08-31 02:00:00,061 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) [2023-08-31 02:00:00,067 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) [2023-08-31 02:00:00,069 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) [2023-08-31 02:00:00,069 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 174 flow. Second operand 11 states and 2018 transitions. [2023-08-31 02:00:00,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 185 transitions, 997 flow [2023-08-31 02:00:00,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-31 02:00:00,091 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2023-08-31 02:00:00,091 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} [2023-08-31 02:00:00,092 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-08-31 02:00:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2023-08-31 02:00:00,093 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) [2023-08-31 02:00:00,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:00:00,093 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] [2023-08-31 02:00:00,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-31 02:00:00,300 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 [2023-08-31 02:00:00,300 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)] === [2023-08-31 02:00:00,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:00:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1124719134, now seen corresponding path program 1 times [2023-08-31 02:00:00,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:00:00,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031172905] [2023-08-31 02:00:00,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:00,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:00:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:00:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031172905] [2023-08-31 02:00:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031172905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:00:01,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126518471] [2023-08-31 02:00:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:01,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:00:01,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:00:01,379 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) [2023-08-31 02:00:01,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-31 02:00:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:01,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-31 02:00:01,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:00:01,894 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 [2023-08-31 02:00:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:02,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:00:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:00:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126518471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:00:02,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:00:02,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-08-31 02:00:02,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963175593] [2023-08-31 02:00:02,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:00:02,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:00:02,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:00:02,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:00:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:00:03,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 400 [2023-08-31 02:00:03,292 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) [2023-08-31 02:00:03,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:00:03,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 400 [2023-08-31 02:00:03,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:00:10,003 INFO L130 PetriNetUnfolder]: 36653/48434 cut-off events. [2023-08-31 02:00:10,003 INFO L131 PetriNetUnfolder]: For 54698/54698 co-relation queries the response was YES. [2023-08-31 02:00:10,161 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. [2023-08-31 02:00:10,489 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 438 selfloop transitions, 273 changer transitions 51/762 dead transitions. [2023-08-31 02:00:10,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 762 transitions, 5071 flow [2023-08-31 02:00:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-31 02:00:10,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-31 02:00:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5931 transitions. [2023-08-31 02:00:10,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42364285714285715 [2023-08-31 02:00:10,511 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5931 transitions. [2023-08-31 02:00:10,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5931 transitions. [2023-08-31 02:00:10,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:00:10,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5931 transitions. [2023-08-31 02:00:10,524 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) [2023-08-31 02:00:10,545 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) [2023-08-31 02:00:10,550 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) [2023-08-31 02:00:10,550 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 35 states and 5931 transitions. [2023-08-31 02:00:10,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 762 transitions, 5071 flow [2023-08-31 02:00:10,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 762 transitions, 4739 flow, removed 165 selfloop flow, removed 2 redundant places. [2023-08-31 02:00:10,695 INFO L231 Difference]: Finished difference. Result has 113 places, 385 transitions, 3471 flow [2023-08-31 02:00:10,695 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} [2023-08-31 02:00:10,696 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-08-31 02:00:10,696 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 385 transitions, 3471 flow [2023-08-31 02:00:10,697 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) [2023-08-31 02:00:10,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:00:10,697 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] [2023-08-31 02:00:10,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-31 02:00:10,901 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 [2023-08-31 02:00:10,901 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)] === [2023-08-31 02:00:10,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:00:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1911556981, now seen corresponding path program 1 times [2023-08-31 02:00:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:00:10,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048459564] [2023-08-31 02:00:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:10,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:00:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:11,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:00:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048459564] [2023-08-31 02:00:11,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048459564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:00:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701805258] [2023-08-31 02:00:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:11,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:00:11,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:00:11,818 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) [2023-08-31 02:00:11,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-31 02:00:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:11,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-31 02:00:11,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:00:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:00:12,144 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 [2023-08-31 02:00:12,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:00:12,202 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 [2023-08-31 02:00:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:00:12,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:00:12,377 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 [2023-08-31 02:00:12,384 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 [2023-08-31 02:00:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:00:12,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701805258] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:00:12,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:00:12,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-08-31 02:00:12,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316200772] [2023-08-31 02:00:12,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:00:12,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-31 02:00:12,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:00:12,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-31 02:00:12,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=479, Unknown=6, NotChecked=44, Total=600 [2023-08-31 02:00:12,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-08-31 02:00:12,615 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) [2023-08-31 02:00:12,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:00:12,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-08-31 02:00:12,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:00:20,765 INFO L130 PetriNetUnfolder]: 41995/55463 cut-off events. [2023-08-31 02:00:20,765 INFO L131 PetriNetUnfolder]: For 248015/248015 co-relation queries the response was YES. [2023-08-31 02:00:21,117 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. [2023-08-31 02:00:21,320 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 521 selfloop transitions, 206 changer transitions 14/741 dead transitions. [2023-08-31 02:00:21,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 741 transitions, 7726 flow [2023-08-31 02:00:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-31 02:00:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-31 02:00:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2516 transitions. [2023-08-31 02:00:21,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-08-31 02:00:21,326 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2516 transitions. [2023-08-31 02:00:21,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2516 transitions. [2023-08-31 02:00:21,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:00:21,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2516 transitions. [2023-08-31 02:00:21,333 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) [2023-08-31 02:00:21,341 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) [2023-08-31 02:00:21,343 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) [2023-08-31 02:00:21,343 INFO L175 Difference]: Start difference. First operand has 113 places, 385 transitions, 3471 flow. Second operand 17 states and 2516 transitions. [2023-08-31 02:00:21,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 741 transitions, 7726 flow [2023-08-31 02:00:27,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 741 transitions, 7376 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-08-31 02:00:27,038 INFO L231 Difference]: Finished difference. Result has 134 places, 544 transitions, 5484 flow [2023-08-31 02:00:27,039 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} [2023-08-31 02:00:27,041 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-08-31 02:00:27,041 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 544 transitions, 5484 flow [2023-08-31 02:00:27,049 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) [2023-08-31 02:00:27,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:00:27,055 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] [2023-08-31 02:00:27,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-31 02:00:27,261 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 [2023-08-31 02:00:27,261 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)] === [2023-08-31 02:00:27,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:00:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1439824054, now seen corresponding path program 1 times [2023-08-31 02:00:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:00:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58083459] [2023-08-31 02:00:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:27,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:00:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:00:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58083459] [2023-08-31 02:00:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58083459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:00:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230114004] [2023-08-31 02:00:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:00:28,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:00:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:00:28,327 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) [2023-08-31 02:00:28,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-31 02:00:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:00:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-31 02:00:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:00:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:00:28,739 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 [2023-08-31 02:00:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:00:28,812 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 [2023-08-31 02:00:28,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:00:28,867 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 [2023-08-31 02:00:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:29,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:00:29,363 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 [2023-08-31 02:00:29,373 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 [2023-08-31 02:00:29,379 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 [2023-08-31 02:00:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:00:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230114004] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:00:29,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:00:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-08-31 02:00:29,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701976856] [2023-08-31 02:00:29,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:00:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-31 02:00:29,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:00:29,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-31 02:00:29,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=804, Unknown=4, NotChecked=0, Total=930 [2023-08-31 02:00:30,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-08-31 02:00:30,936 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) [2023-08-31 02:00:30,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:00:30,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-08-31 02:00:30,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:00:49,704 INFO L130 PetriNetUnfolder]: 62211/82163 cut-off events. [2023-08-31 02:00:49,704 INFO L131 PetriNetUnfolder]: For 425215/425215 co-relation queries the response was YES. [2023-08-31 02:00:50,392 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. [2023-08-31 02:00:50,643 INFO L137 encePairwiseOnDemand]: 384/400 looper letters, 1027 selfloop transitions, 751 changer transitions 44/1822 dead transitions. [2023-08-31 02:00:50,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1822 transitions, 18693 flow [2023-08-31 02:00:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-31 02:00:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-31 02:00:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 8331 transitions. [2023-08-31 02:00:50,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3530084745762712 [2023-08-31 02:00:50,663 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 8331 transitions. [2023-08-31 02:00:50,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 8331 transitions. [2023-08-31 02:00:50,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:00:50,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 8331 transitions. [2023-08-31 02:00:50,681 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) [2023-08-31 02:00:50,710 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) [2023-08-31 02:00:50,716 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) [2023-08-31 02:00:50,717 INFO L175 Difference]: Start difference. First operand has 134 places, 544 transitions, 5484 flow. Second operand 59 states and 8331 transitions. [2023-08-31 02:00:50,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1822 transitions, 18693 flow [2023-08-31 02:01:03,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1822 transitions, 18219 flow, removed 171 selfloop flow, removed 6 redundant places. [2023-08-31 02:01:03,888 INFO L231 Difference]: Finished difference. Result has 210 places, 1223 transitions, 15224 flow [2023-08-31 02:01:03,888 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} [2023-08-31 02:01:03,889 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 171 predicate places. [2023-08-31 02:01:03,889 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 1223 transitions, 15224 flow [2023-08-31 02:01:03,890 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) [2023-08-31 02:01:03,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:01:03,890 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] [2023-08-31 02:01:03,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-31 02:01:04,090 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 [2023-08-31 02:01:04,091 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)] === [2023-08-31 02:01:04,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:01:04,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1615068153, now seen corresponding path program 1 times [2023-08-31 02:01:04,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:01:04,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570609238] [2023-08-31 02:01:04,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:01:04,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:01:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:01:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:01:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:01:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570609238] [2023-08-31 02:01:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570609238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:01:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157378451] [2023-08-31 02:01:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:01:04,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:01:04,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:01:04,866 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) [2023-08-31 02:01:04,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-31 02:01:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:01:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-31 02:01:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:01:05,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:01:05,483 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 [2023-08-31 02:01:05,553 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 [2023-08-31 02:01:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:05,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:01:05,909 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-08-31 02:01:05,909 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 [2023-08-31 02:01:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:01:06,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157378451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:01:06,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:01:06,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-31 02:01:06,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106261111] [2023-08-31 02:01:06,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:01:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-31 02:01:06,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:01:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-31 02:01:06,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=574, Unknown=3, NotChecked=0, Total=702 [2023-08-31 02:01:06,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-08-31 02:01:06,484 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) [2023-08-31 02:01:06,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:01:06,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-08-31 02:01:06,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:01:39,775 INFO L130 PetriNetUnfolder]: 97170/128515 cut-off events. [2023-08-31 02:01:39,775 INFO L131 PetriNetUnfolder]: For 890176/890176 co-relation queries the response was YES. [2023-08-31 02:01:41,469 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 782567 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. [2023-08-31 02:01:41,980 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 2062 selfloop transitions, 826 changer transitions 98/2986 dead transitions. [2023-08-31 02:01:41,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 2986 transitions, 36973 flow [2023-08-31 02:01:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-31 02:01:41,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-31 02:01:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 11445 transitions. [2023-08-31 02:01:41,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3715909090909091 [2023-08-31 02:01:41,997 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 11445 transitions. [2023-08-31 02:01:41,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 11445 transitions. [2023-08-31 02:01:42,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:01:42,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 11445 transitions. [2023-08-31 02:01:42,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 148.63636363636363) internal successors, (11445), 77 states have internal predecessors, (11445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:42,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 400.0) internal successors, (31200), 78 states have internal predecessors, (31200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:42,059 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 400.0) internal successors, (31200), 78 states have internal predecessors, (31200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:01:42,059 INFO L175 Difference]: Start difference. First operand has 210 places, 1223 transitions, 15224 flow. Second operand 77 states and 11445 transitions. [2023-08-31 02:01:42,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 2986 transitions, 36973 flow [2023-08-31 02:02:33,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 2986 transitions, 32369 flow, removed 2167 selfloop flow, removed 10 redundant places. [2023-08-31 02:02:33,303 INFO L231 Difference]: Finished difference. Result has 304 places, 1925 transitions, 24106 flow [2023-08-31 02:02:33,304 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=77, PETRI_FLOW=24106, PETRI_PLACES=304, PETRI_TRANSITIONS=1925} [2023-08-31 02:02:33,304 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 265 predicate places. [2023-08-31 02:02:33,305 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1925 transitions, 24106 flow [2023-08-31 02:02:33,305 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) [2023-08-31 02:02:33,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:02:33,306 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] [2023-08-31 02:02:33,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-31 02:02:33,506 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 [2023-08-31 02:02:33,507 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)] === [2023-08-31 02:02:33,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:02:33,507 INFO L85 PathProgramCache]: Analyzing trace with hash 2074877216, now seen corresponding path program 2 times [2023-08-31 02:02:33,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:02:33,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511852350] [2023-08-31 02:02:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:02:33,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:02:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:02:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:02:34,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:02:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511852350] [2023-08-31 02:02:34,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511852350] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:02:34,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116097766] [2023-08-31 02:02:34,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:02:34,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:02:34,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:02:34,033 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) [2023-08-31 02:02:34,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-31 02:02:34,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:02:34,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:02:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-31 02:02:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:02:34,419 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 [2023-08-31 02:02:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:02:34,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:02:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:02:34,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116097766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:02:34,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:02:34,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 20 [2023-08-31 02:02:34,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046684516] [2023-08-31 02:02:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:02:34,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-31 02:02:34,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:02:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-31 02:02:34,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-08-31 02:02:35,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 400 [2023-08-31 02:02:35,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1925 transitions, 24106 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) [2023-08-31 02:02:35,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:02:35,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 400 [2023-08-31 02:02:35,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:03:18,761 INFO L130 PetriNetUnfolder]: 122775/162198 cut-off events. [2023-08-31 02:03:18,762 INFO L131 PetriNetUnfolder]: For 969287/969287 co-relation queries the response was YES. [2023-08-31 02:03:22,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 802696 conditions, 162198 events. 122775/162198 cut-off events. For 969287/969287 co-relation queries the response was YES. Maximal size of possible extension queue 5337. Compared 1010818 event pairs, 16937 based on Foata normal form. 19/162217 useless extension candidates. Maximal degree in co-relation 798137. Up to 128866 conditions per place. [2023-08-31 02:03:22,880 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 1736 selfloop transitions, 1300 changer transitions 11/3047 dead transitions. [2023-08-31 02:03:22,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 3047 transitions, 43078 flow [2023-08-31 02:03:22,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-31 02:03:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-31 02:03:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4693 transitions. [2023-08-31 02:03:22,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41901785714285716 [2023-08-31 02:03:22,885 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4693 transitions. [2023-08-31 02:03:22,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4693 transitions. [2023-08-31 02:03:22,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:03:22,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4693 transitions. [2023-08-31 02:03:22,892 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) [2023-08-31 02:03:22,900 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) [2023-08-31 02:03:22,902 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) [2023-08-31 02:03:22,902 INFO L175 Difference]: Start difference. First operand has 304 places, 1925 transitions, 24106 flow. Second operand 28 states and 4693 transitions. [2023-08-31 02:03:22,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 3047 transitions, 43078 flow [2023-08-31 02:04:33,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 3047 transitions, 37862 flow, removed 2418 selfloop flow, removed 8 redundant places. [2023-08-31 02:04:33,117 INFO L231 Difference]: Finished difference. Result has 340 places, 2732 transitions, 35132 flow [2023-08-31 02:04:33,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=20567, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=645, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=35132, PETRI_PLACES=340, PETRI_TRANSITIONS=2732} [2023-08-31 02:04:33,119 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 301 predicate places. [2023-08-31 02:04:33,119 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 2732 transitions, 35132 flow [2023-08-31 02:04:33,120 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) [2023-08-31 02:04:33,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:04:33,120 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] [2023-08-31 02:04:33,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-31 02:04:33,326 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 [2023-08-31 02:04:33,326 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)] === [2023-08-31 02:04:33,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:04:33,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1844979306, now seen corresponding path program 2 times [2023-08-31 02:04:33,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:04:33,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283481087] [2023-08-31 02:04:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:04:33,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:04:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:04:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:04:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:04:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283481087] [2023-08-31 02:04:34,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283481087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:04:34,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95126241] [2023-08-31 02:04:34,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:04:34,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:04:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:04:34,165 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) [2023-08-31 02:04:34,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-31 02:04:34,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:04:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:04:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-31 02:04:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:04:34,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:04:34,485 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 [2023-08-31 02:04:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:04:34,540 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 [2023-08-31 02:04:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-31 02:04:34,632 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 [2023-08-31 02:04:34,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-31 02:04:34,660 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 [2023-08-31 02:04:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-31 02:04:34,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:04:34,924 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 [2023-08-31 02:04:34,992 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 [2023-08-31 02:04:34,999 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 [2023-08-31 02:04:35,003 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 [2023-08-31 02:04:35,007 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 [2023-08-31 02:04:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:04:35,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95126241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:04:35,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:04:35,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 27 [2023-08-31 02:04:35,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214779434] [2023-08-31 02:04:35,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:04:35,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-31 02:04:35,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:04:35,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-31 02:04:35,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=644, Unknown=14, NotChecked=52, Total=812 [2023-08-31 02:04:35,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-08-31 02:04:35,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 2732 transitions, 35132 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) [2023-08-31 02:04:35,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:04:35,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-08-31 02:04:35,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-31 02:04:49,172 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (and (= (+ c_~n~0 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (or (and (not (= |c_ULTIMATE.start_main_~#t4~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 2)) (<= .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base|) (<= |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 2) (<= .cse0 |c_ULTIMATE.start_main_~#t4~0#1.base|) (forall ((v_ArrVal_537 (Array Int Int))) (= (+ c_~s2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_537) c_~x~0.base) (+ c_~x~0.offset (* c_~i1~0 4)))) c_~s1~0)) (= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (<= .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base|))) is different from false [2023-08-31 02:05:03,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-31 02:05:17,298 WARN L222 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 78 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-31 02:06:15,973 INFO L130 PetriNetUnfolder]: 146116/193244 cut-off events. [2023-08-31 02:06:15,973 INFO L131 PetriNetUnfolder]: For 1232421/1232421 co-relation queries the response was YES. [2023-08-31 02:06:20,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011922 conditions, 193244 events. 146116/193244 cut-off events. For 1232421/1232421 co-relation queries the response was YES. Maximal size of possible extension queue 6597. Compared 1234495 event pairs, 20022 based on Foata normal form. 1097/194341 useless extension candidates. Maximal degree in co-relation 1007376. Up to 74114 conditions per place. [2023-08-31 02:06:21,643 INFO L137 encePairwiseOnDemand]: 379/400 looper letters, 2684 selfloop transitions, 1687 changer transitions 22/4393 dead transitions. [2023-08-31 02:06:21,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 4393 transitions, 61138 flow [2023-08-31 02:06:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-31 02:06:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-31 02:06:21,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 9687 transitions. [2023-08-31 02:06:21,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35097826086956524 [2023-08-31 02:06:21,655 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 9687 transitions. [2023-08-31 02:06:21,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 9687 transitions. [2023-08-31 02:06:21,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-31 02:06:21,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 9687 transitions. [2023-08-31 02:06:21,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 140.3913043478261) internal successors, (9687), 69 states have internal predecessors, (9687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:21,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 400.0) internal successors, (28000), 70 states have internal predecessors, (28000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:21,692 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 400.0) internal successors, (28000), 70 states have internal predecessors, (28000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-31 02:06:21,693 INFO L175 Difference]: Start difference. First operand has 340 places, 2732 transitions, 35132 flow. Second operand 69 states and 9687 transitions. [2023-08-31 02:06:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 4393 transitions, 61138 flow [2023-08-31 02:08:03,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 4393 transitions, 59306 flow, removed 895 selfloop flow, removed 7 redundant places. [2023-08-31 02:08:04,012 INFO L231 Difference]: Finished difference. Result has 428 places, 3751 transitions, 52496 flow [2023-08-31 02:08:04,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=32828, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=740, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=52496, PETRI_PLACES=428, PETRI_TRANSITIONS=3751} [2023-08-31 02:08:04,015 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 389 predicate places. [2023-08-31 02:08:04,015 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 3751 transitions, 52496 flow [2023-08-31 02:08:04,016 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) [2023-08-31 02:08:04,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-31 02:08:04,016 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] [2023-08-31 02:08:04,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-31 02:08:04,222 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 [2023-08-31 02:08:04,222 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)] === [2023-08-31 02:08:04,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-31 02:08:04,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1582268893, now seen corresponding path program 2 times [2023-08-31 02:08:04,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-31 02:08:04,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756692867] [2023-08-31 02:08:04,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-31 02:08:04,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-31 02:08:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-31 02:08:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:05,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-31 02:08:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756692867] [2023-08-31 02:08:05,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756692867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-31 02:08:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057082001] [2023-08-31 02:08:05,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-31 02:08:05,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-31 02:08:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-31 02:08:05,081 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) [2023-08-31 02:08:05,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-31 02:08:05,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-31 02:08:05,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-31 02:08:05,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-31 02:08:05,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-31 02:08:05,469 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 [2023-08-31 02:08:05,586 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 [2023-08-31 02:08:05,789 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 [2023-08-31 02:08:06,027 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 [2023-08-31 02:08:06,179 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 [2023-08-31 02:08:06,501 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 [2023-08-31 02:08:06,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-31 02:08:06,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-31 02:08:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-31 02:08:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057082001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-31 02:08:07,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-31 02:08:07,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11, 5] total 22 [2023-08-31 02:08:07,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748434523] [2023-08-31 02:08:07,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-31 02:08:07,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-31 02:08:07,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-31 02:08:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-31 02:08:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-08-31 02:08:10,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 400 [2023-08-31 02:08:10,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 3751 transitions, 52496 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) [2023-08-31 02:08:10,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-31 02:08:10,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 400 [2023-08-31 02:08:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand