/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 03:50:19,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 03:50:19,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 03:50:19,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 03:50:19,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 03:50:19,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 03:50:19,598 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 03:50:19,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 03:50:19,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 03:50:19,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 03:50:19,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 03:50:19,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 03:50:19,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 03:50:19,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 03:50:19,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 03:50:19,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 03:50:19,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 03:50:19,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 03:50:19,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 03:50:19,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 03:50:19,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 03:50:19,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 03:50:19,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 03:50:19,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 03:50:19,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 03:50:19,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 03:50:19,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 03:50:19,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 03:50:19,632 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 03:50:19,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 03:50:19,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 03:50:19,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 03:50:19,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 03:50:19,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 03:50:19,634 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 03:50:19,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 03:50:19,638 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 03:50:19,653 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 03:50:19,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 03:50:19,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 03:50:19,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 03:50:19,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 03:50:19,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 03:50:19,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 03:50:19,655 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 03:50:19,656 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 03:50:19,656 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 03:50:19,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 03:50:19,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:50:19,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 03:50:19,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 03:50:19,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 03:50:19,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 03:50:19,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 03:50:19,659 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 03:50:19,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 03:50:19,659 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 03:50:19,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 03:50:19,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 03:50:19,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 03:50:19,851 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 03:50:19,854 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 03:50:19,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-01-28 03:50:21,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 03:50:21,201 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 03:50:21,201 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c [2023-01-28 03:50:21,207 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3182a0358/55e5a5ce69cb4437941cdd4941bb8436/FLAGf7410e308 [2023-01-28 03:50:21,218 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3182a0358/55e5a5ce69cb4437941cdd4941bb8436 [2023-01-28 03:50:21,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 03:50:21,221 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 03:50:21,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 03:50:21,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 03:50:21,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 03:50:21,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128e55a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21, skipping insertion in model container [2023-01-28 03:50:21,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 03:50:21,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 03:50:21,385 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-01-28 03:50:21,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:50:21,400 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 03:50:21,422 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-ring.wvr.c[3947,3960] [2023-01-28 03:50:21,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 03:50:21,432 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:50:21,432 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 03:50:21,437 INFO L208 MainTranslator]: Completed translation [2023-01-28 03:50:21,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21 WrapperNode [2023-01-28 03:50:21,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 03:50:21,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 03:50:21,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 03:50:21,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 03:50:21,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,478 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 325 [2023-01-28 03:50:21,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 03:50:21,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 03:50:21,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 03:50:21,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 03:50:21,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 03:50:21,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 03:50:21,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 03:50:21,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 03:50:21,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (1/1) ... [2023-01-28 03:50:21,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 03:50:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:21,546 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) [2023-01-28 03:50:21,547 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 [2023-01-28 03:50:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 03:50:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 03:50:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 03:50:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 03:50:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 03:50:21,582 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 03:50:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 03:50:21,582 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 03:50:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 03:50:21,582 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 03:50:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 03:50:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 03:50:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 03:50:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 03:50:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 03:50:21,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 03:50:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 03:50:21,585 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 03:50:21,703 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 03:50:21,705 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 03:50:22,146 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 03:50:22,411 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 03:50:22,412 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-01-28 03:50:22,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:50:22 BoogieIcfgContainer [2023-01-28 03:50:22,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 03:50:22,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 03:50:22,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 03:50:22,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 03:50:22,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 03:50:21" (1/3) ... [2023-01-28 03:50:22,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc54ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:50:22, skipping insertion in model container [2023-01-28 03:50:22,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 03:50:21" (2/3) ... [2023-01-28 03:50:22,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fc54ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:50:22, skipping insertion in model container [2023-01-28 03:50:22,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:50:22" (3/3) ... [2023-01-28 03:50:22,420 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2023-01-28 03:50:22,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 03:50:22,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 03:50:22,434 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 03:50:22,534 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 03:50:22,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 255 transitions, 534 flow [2023-01-28 03:50:22,678 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2023-01-28 03:50:22,678 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:50:22,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 252 events. 22/252 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 158 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-01-28 03:50:22,687 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 255 transitions, 534 flow [2023-01-28 03:50:22,693 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 242 transitions, 502 flow [2023-01-28 03:50:22,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 03:50:22,705 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 242 transitions, 502 flow [2023-01-28 03:50:22,707 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 242 transitions, 502 flow [2023-01-28 03:50:22,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 242 transitions, 502 flow [2023-01-28 03:50:22,765 INFO L130 PetriNetUnfolder]: 22/242 cut-off events. [2023-01-28 03:50:22,765 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:50:22,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 242 events. 22/242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 214. Up to 3 conditions per place. [2023-01-28 03:50:22,769 INFO L119 LiptonReduction]: Number of co-enabled transitions 1962 [2023-01-28 03:50:30,904 INFO L134 LiptonReduction]: Checked pairs total: 3161 [2023-01-28 03:50:30,905 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-01-28 03:50:30,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 03:50:30,921 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=false, 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;@5b110954, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 03:50:30,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 03:50:30,932 INFO L130 PetriNetUnfolder]: 8/32 cut-off events. [2023-01-28 03:50:30,932 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 03:50:30,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:30,934 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] [2023-01-28 03:50:30,934 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 1 more)] === [2023-01-28 03:50:30,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1137441367, now seen corresponding path program 1 times [2023-01-28 03:50:30,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156125401] [2023-01-28 03:50:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:31,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:31,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156125401] [2023-01-28 03:50:31,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156125401] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:31,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:31,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 03:50:31,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684591271] [2023-01-28 03:50:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:31,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 03:50:31,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 03:50:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 03:50:31,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 507 [2023-01-28 03:50:31,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 84 flow. Second operand has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:31,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 507 [2023-01-28 03:50:31,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:31,336 INFO L130 PetriNetUnfolder]: 468/682 cut-off events. [2023-01-28 03:50:31,336 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-01-28 03:50:31,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1432 conditions, 682 events. 468/682 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2010 event pairs, 333 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 1160. Up to 683 conditions per place. [2023-01-28 03:50:31,344 INFO L137 encePairwiseOnDemand]: 505/507 looper letters, 31 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2023-01-28 03:50:31,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 142 flow [2023-01-28 03:50:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 03:50:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 03:50:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 483 transitions. [2023-01-28 03:50:31,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47633136094674555 [2023-01-28 03:50:31,363 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 483 transitions. [2023-01-28 03:50:31,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 483 transitions. [2023-01-28 03:50:31,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:31,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 483 transitions. [2023-01-28 03:50:31,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 241.5) internal successors, (483), 2 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,377 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 507.0) internal successors, (1521), 3 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,378 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 84 flow. Second operand 2 states and 483 transitions. [2023-01-28 03:50:31,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 142 flow [2023-01-28 03:50:31,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 03:50:31,383 INFO L231 Difference]: Finished difference. Result has 30 places, 31 transitions, 68 flow [2023-01-28 03:50:31,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=68, PETRI_PLACES=30, PETRI_TRANSITIONS=31} [2023-01-28 03:50:31,387 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2023-01-28 03:50:31,387 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 31 transitions, 68 flow [2023-01-28 03:50:31,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 236.0) internal successors, (472), 2 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:31,388 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] [2023-01-28 03:50:31,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 03:50:31,388 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 1 more)] === [2023-01-28 03:50:31,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:31,389 INFO L85 PathProgramCache]: Analyzing trace with hash -341274689, now seen corresponding path program 1 times [2023-01-28 03:50:31,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:31,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217586204] [2023-01-28 03:50:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:31,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:50:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:31,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217586204] [2023-01-28 03:50:31,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217586204] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:31,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:31,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756073921] [2023-01-28 03:50:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:31,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:31,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:31,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-28 03:50:31,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:31,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-28 03:50:31,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:31,839 INFO L130 PetriNetUnfolder]: 529/791 cut-off events. [2023-01-28 03:50:31,839 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 03:50:31,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1613 conditions, 791 events. 529/791 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2481 event pairs, 384 based on Foata normal form. 42/687 useless extension candidates. Maximal degree in co-relation 1610. Up to 683 conditions per place. [2023-01-28 03:50:31,842 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 30 selfloop transitions, 2 changer transitions 17/49 dead transitions. [2023-01-28 03:50:31,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 205 flow [2023-01-28 03:50:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:50:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:50:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 808 transitions. [2023-01-28 03:50:31,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398422090729783 [2023-01-28 03:50:31,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 808 transitions. [2023-01-28 03:50:31,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 808 transitions. [2023-01-28 03:50:31,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:31,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 808 transitions. [2023-01-28 03:50:31,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,854 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 68 flow. Second operand 4 states and 808 transitions. [2023-01-28 03:50:31,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 205 flow [2023-01-28 03:50:31,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 03:50:31,856 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-01-28 03:50:31,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-01-28 03:50:31,857 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 0 predicate places. [2023-01-28 03:50:31,857 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-01-28 03:50:31,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:31,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:31,858 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] [2023-01-28 03:50:31,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 03:50:31,858 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 1 more)] === [2023-01-28 03:50:31,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:31,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1803368648, now seen corresponding path program 1 times [2023-01-28 03:50:31,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:31,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601395370] [2023-01-28 03:50:31,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:31,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:31,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:31,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:31,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601395370] [2023-01-28 03:50:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601395370] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:31,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837787562] [2023-01-28 03:50:31,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:31,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:31,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-28 03:50:31,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 4 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) [2023-01-28 03:50:31,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:31,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-28 03:50:32,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:32,197 INFO L130 PetriNetUnfolder]: 755/1159 cut-off events. [2023-01-28 03:50:32,197 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-28 03:50:32,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1159 events. 755/1159 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4347 event pairs, 579 based on Foata normal form. 116/1097 useless extension candidates. Maximal degree in co-relation 2646. Up to 684 conditions per place. [2023-01-28 03:50:32,204 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 31 selfloop transitions, 2 changer transitions 35/68 dead transitions. [2023-01-28 03:50:32,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 68 transitions, 314 flow [2023-01-28 03:50:32,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 03:50:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 03:50:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-01-28 03:50:32,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40157790927021697 [2023-01-28 03:50:32,207 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-01-28 03:50:32,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-01-28 03:50:32,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:32,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-01-28 03:50:32,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,216 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 507.0) internal successors, (3042), 6 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,216 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 5 states and 1018 transitions. [2023-01-28 03:50:32,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 68 transitions, 314 flow [2023-01-28 03:50:32,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 68 transitions, 310 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:32,219 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 108 flow [2023-01-28 03:50:32,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-01-28 03:50:32,219 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-01-28 03:50:32,219 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 108 flow [2023-01-28 03:50:32,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-01-28 03:50:32,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:32,220 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, 1] [2023-01-28 03:50:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 03:50:32,221 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 1 more)] === [2023-01-28 03:50:32,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1356236085, now seen corresponding path program 1 times [2023-01-28 03:50:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:32,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324201670] [2023-01-28 03:50:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324201670] [2023-01-28 03:50:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324201670] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:32,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 03:50:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848735575] [2023-01-28 03:50:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:50:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:50:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 03:50:32,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 507 [2023-01-28 03:50:32,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:32,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 507 [2023-01-28 03:50:32,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:32,502 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-01-28 03:50:32,502 INFO L131 PetriNetUnfolder]: For 431/431 co-relation queries the response was YES. [2023-01-28 03:50:32,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3097 conditions, 1143 events. 759/1143 cut-off events. For 431/431 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4122 event pairs, 586 based on Foata normal form. 76/1014 useless extension candidates. Maximal degree in co-relation 3088. Up to 685 conditions per place. [2023-01-28 03:50:32,508 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 32 selfloop transitions, 2 changer transitions 20/54 dead transitions. [2023-01-28 03:50:32,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 283 flow [2023-01-28 03:50:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:50:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:50:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 811 transitions. [2023-01-28 03:50:32,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39990138067061143 [2023-01-28 03:50:32,511 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 811 transitions. [2023-01-28 03:50:32,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 811 transitions. [2023-01-28 03:50:32,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:32,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 811 transitions. [2023-01-28 03:50:32,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,518 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 108 flow. Second operand 4 states and 811 transitions. [2023-01-28 03:50:32,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 283 flow [2023-01-28 03:50:32,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 263 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:32,521 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 114 flow [2023-01-28 03:50:32,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-01-28 03:50:32,522 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2023-01-28 03:50:32,522 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 114 flow [2023-01-28 03:50:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:32,523 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, 1, 1] [2023-01-28 03:50:32,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 03:50:32,523 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 1 more)] === [2023-01-28 03:50:32,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2052825742, now seen corresponding path program 1 times [2023-01-28 03:50:32,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:32,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86592943] [2023-01-28 03:50:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:32,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:50:32,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:32,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86592943] [2023-01-28 03:50:32,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86592943] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:32,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:32,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 03:50:32,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533948893] [2023-01-28 03:50:32,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:32,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:32,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:32,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-01-28 03:50:32,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:32,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-01-28 03:50:32,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:32,881 INFO L130 PetriNetUnfolder]: 834/1218 cut-off events. [2023-01-28 03:50:32,881 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-01-28 03:50:32,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3231 conditions, 1218 events. 834/1218 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4372 event pairs, 333 based on Foata normal form. 1/972 useless extension candidates. Maximal degree in co-relation 3221. Up to 642 conditions per place. [2023-01-28 03:50:32,887 INFO L137 encePairwiseOnDemand]: 504/507 looper letters, 47 selfloop transitions, 2 changer transitions 6/55 dead transitions. [2023-01-28 03:50:32,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 289 flow [2023-01-28 03:50:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-01-28 03:50:32,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707429322813938 [2023-01-28 03:50:32,890 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-01-28 03:50:32,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-01-28 03:50:32,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:32,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-01-28 03:50:32,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,896 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 114 flow. Second operand 3 states and 716 transitions. [2023-01-28 03:50:32,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 289 flow [2023-01-28 03:50:32,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:32,900 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 124 flow [2023-01-28 03:50:32,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-01-28 03:50:32,902 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 7 predicate places. [2023-01-28 03:50:32,903 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 124 flow [2023-01-28 03:50:32,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.0) internal successors, (690), 3 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:32,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:32,904 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, 1, 1, 1, 1] [2023-01-28 03:50:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 03:50:32,904 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 1 more)] === [2023-01-28 03:50:32,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 402993380, now seen corresponding path program 1 times [2023-01-28 03:50:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075249485] [2023-01-28 03:50:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:33,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075249485] [2023-01-28 03:50:33,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075249485] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562167014] [2023-01-28 03:50:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:33,130 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) [2023-01-28 03:50:33,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 03:50:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:33,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:50:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:33,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562167014] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:33,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 03:50:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683150678] [2023-01-28 03:50:33,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:33,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:50:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:50:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:50:33,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 507 [2023-01-28 03:50:33,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 124 flow. Second operand has 11 states, 11 states have (on average 191.27272727272728) internal successors, (2104), 11 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:33,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:33,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 507 [2023-01-28 03:50:33,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:33,802 INFO L130 PetriNetUnfolder]: 1355/2016 cut-off events. [2023-01-28 03:50:33,802 INFO L131 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2023-01-28 03:50:33,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 2016 events. 1355/2016 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8244 event pairs, 714 based on Foata normal form. 72/1706 useless extension candidates. Maximal degree in co-relation 5505. Up to 1218 conditions per place. [2023-01-28 03:50:33,811 INFO L137 encePairwiseOnDemand]: 501/507 looper letters, 33 selfloop transitions, 3 changer transitions 42/78 dead transitions. [2023-01-28 03:50:33,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 78 transitions, 419 flow [2023-01-28 03:50:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:50:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:50:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1197 transitions. [2023-01-28 03:50:33,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39349112426035504 [2023-01-28 03:50:33,816 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1197 transitions. [2023-01-28 03:50:33,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1197 transitions. [2023-01-28 03:50:33,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:33,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1197 transitions. [2023-01-28 03:50:33,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:33,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:33,824 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:33,824 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 124 flow. Second operand 6 states and 1197 transitions. [2023-01-28 03:50:33,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 78 transitions, 419 flow [2023-01-28 03:50:33,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 78 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:33,828 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 148 flow [2023-01-28 03:50:33,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-01-28 03:50:33,830 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 14 predicate places. [2023-01-28 03:50:33,832 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 148 flow [2023-01-28 03:50:33,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 191.27272727272728) internal successors, (2104), 11 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:33,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:33,833 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, 1, 1] [2023-01-28 03:50:33,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:34,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 03:50:34,039 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 1 more)] === [2023-01-28 03:50:34,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1520183157, now seen corresponding path program 2 times [2023-01-28 03:50:34,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:34,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989363504] [2023-01-28 03:50:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:34,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:34,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989363504] [2023-01-28 03:50:34,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989363504] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:34,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:34,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:34,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044630656] [2023-01-28 03:50:34,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:34,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:34,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:34,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:34,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:34,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-01-28 03:50:34,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:34,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-01-28 03:50:34,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:34,423 INFO L130 PetriNetUnfolder]: 906/1311 cut-off events. [2023-01-28 03:50:34,424 INFO L131 PetriNetUnfolder]: For 950/950 co-relation queries the response was YES. [2023-01-28 03:50:34,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3985 conditions, 1311 events. 906/1311 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4447 event pairs, 287 based on Foata normal form. 34/1052 useless extension candidates. Maximal degree in co-relation 3971. Up to 844 conditions per place. [2023-01-28 03:50:34,430 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 43 selfloop transitions, 3 changer transitions 5/51 dead transitions. [2023-01-28 03:50:34,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 308 flow [2023-01-28 03:50:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-01-28 03:50:34,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46679815910585143 [2023-01-28 03:50:34,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-01-28 03:50:34,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-01-28 03:50:34,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:34,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-01-28 03:50:34,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,439 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 148 flow. Second operand 3 states and 710 transitions. [2023-01-28 03:50:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 308 flow [2023-01-28 03:50:34,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 280 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-01-28 03:50:34,442 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 153 flow [2023-01-28 03:50:34,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2023-01-28 03:50:34,443 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-01-28 03:50:34,443 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 153 flow [2023-01-28 03:50:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:34,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:34,444 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, 1, 1] [2023-01-28 03:50:34,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 03:50:34,444 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 1 more)] === [2023-01-28 03:50:34,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash -821181061, now seen corresponding path program 3 times [2023-01-28 03:50:34,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:34,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161582025] [2023-01-28 03:50:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:34,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:35,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161582025] [2023-01-28 03:50:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161582025] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:35,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047387361] [2023-01-28 03:50:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:50:35,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:35,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:35,330 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) [2023-01-28 03:50:35,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 03:50:35,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:50:35,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 03:50:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:35,543 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 838 treesize of output 822 [2023-01-28 03:50:35,638 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 [2023-01-28 03:50:35,660 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 23 treesize of output 7 [2023-01-28 03:50:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:35,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 03:50:35,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047387361] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:35,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 03:50:35,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2023-01-28 03:50:35,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763769705] [2023-01-28 03:50:35,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:35,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 03:50:35,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 03:50:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-01-28 03:50:35,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 507 [2023-01-28 03:50:35,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 153 flow. Second operand has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:35,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:35,680 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 507 [2023-01-28 03:50:35,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:36,037 INFO L130 PetriNetUnfolder]: 1046/1548 cut-off events. [2023-01-28 03:50:36,037 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2023-01-28 03:50:36,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4682 conditions, 1548 events. 1046/1548 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5963 event pairs, 300 based on Foata normal form. 28/1283 useless extension candidates. Maximal degree in co-relation 4669. Up to 901 conditions per place. [2023-01-28 03:50:36,044 INFO L137 encePairwiseOnDemand]: 500/507 looper letters, 80 selfloop transitions, 6 changer transitions 2/88 dead transitions. [2023-01-28 03:50:36,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 88 transitions, 534 flow [2023-01-28 03:50:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:50:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:50:36,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1412 transitions. [2023-01-28 03:50:36,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978585517047056 [2023-01-28 03:50:36,048 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1412 transitions. [2023-01-28 03:50:36,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1412 transitions. [2023-01-28 03:50:36,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:36,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1412 transitions. [2023-01-28 03:50:36,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 201.71428571428572) internal successors, (1412), 7 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:36,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:36,058 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:36,058 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 153 flow. Second operand 7 states and 1412 transitions. [2023-01-28 03:50:36,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 88 transitions, 534 flow [2023-01-28 03:50:36,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 88 transitions, 509 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-01-28 03:50:36,062 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 189 flow [2023-01-28 03:50:36,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=189, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-01-28 03:50:36,063 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-01-28 03:50:36,063 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 189 flow [2023-01-28 03:50:36,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:36,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:36,065 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, 1, 1] [2023-01-28 03:50:36,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:36,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-28 03:50:36,271 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 1 more)] === [2023-01-28 03:50:36,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:36,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2136771815, now seen corresponding path program 4 times [2023-01-28 03:50:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719681659] [2023-01-28 03:50:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719681659] [2023-01-28 03:50:37,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719681659] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:37,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962192886] [2023-01-28 03:50:37,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:50:37,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:37,040 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) [2023-01-28 03:50:37,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 03:50:37,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:50:37,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 03:50:37,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:37,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:50:37,416 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 [2023-01-28 03:50:37,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:50:37,478 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 [2023-01-28 03:50:37,529 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 25 treesize of output 7 [2023-01-28 03:50:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:37,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:37,761 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 157 treesize of output 141 [2023-01-28 03:50:37,770 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 28 treesize of output 16 [2023-01-28 03:50:37,824 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 27 treesize of output 21 [2023-01-28 03:50:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:50:38,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962192886] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:38,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2023-01-28 03:50:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516705761] [2023-01-28 03:50:38,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:38,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 03:50:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 03:50:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=743, Unknown=3, NotChecked=0, Total=870 [2023-01-28 03:50:38,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 507 [2023-01-28 03:50:38,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 189 flow. Second operand has 30 states, 30 states have (on average 160.6) internal successors, (4818), 30 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:38,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:38,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 507 [2023-01-28 03:50:38,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:40,215 INFO L130 PetriNetUnfolder]: 3054/4541 cut-off events. [2023-01-28 03:50:40,215 INFO L131 PetriNetUnfolder]: For 4864/4864 co-relation queries the response was YES. [2023-01-28 03:50:40,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14995 conditions, 4541 events. 3054/4541 cut-off events. For 4864/4864 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21756 event pairs, 739 based on Foata normal form. 198/4110 useless extension candidates. Maximal degree in co-relation 14979. Up to 1117 conditions per place. [2023-01-28 03:50:40,242 INFO L137 encePairwiseOnDemand]: 497/507 looper letters, 213 selfloop transitions, 35 changer transitions 24/272 dead transitions. [2023-01-28 03:50:40,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 272 transitions, 1739 flow [2023-01-28 03:50:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 03:50:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 03:50:40,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4033 transitions. [2023-01-28 03:50:40,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3314431295200526 [2023-01-28 03:50:40,256 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4033 transitions. [2023-01-28 03:50:40,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4033 transitions. [2023-01-28 03:50:40,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:40,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4033 transitions. [2023-01-28 03:50:40,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.04166666666666) internal successors, (4033), 24 states have internal predecessors, (4033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 507.0) internal successors, (12675), 25 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,298 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 507.0) internal successors, (12675), 25 states have internal predecessors, (12675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,299 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 189 flow. Second operand 24 states and 4033 transitions. [2023-01-28 03:50:40,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 272 transitions, 1739 flow [2023-01-28 03:50:40,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 272 transitions, 1718 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:40,311 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 561 flow [2023-01-28 03:50:40,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=561, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2023-01-28 03:50:40,312 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 53 predicate places. [2023-01-28 03:50:40,312 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 561 flow [2023-01-28 03:50:40,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 160.6) internal successors, (4818), 30 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:40,315 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, 1, 1] [2023-01-28 03:50:40,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 03:50:40,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:40,521 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 1 more)] === [2023-01-28 03:50:40,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1230266139, now seen corresponding path program 5 times [2023-01-28 03:50:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:40,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125303122] [2023-01-28 03:50:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 03:50:40,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:40,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125303122] [2023-01-28 03:50:40,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125303122] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:50:40,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 03:50:40,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 03:50:40,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369106963] [2023-01-28 03:50:40,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:50:40,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 03:50:40,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 03:50:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 03:50:40,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 507 [2023-01-28 03:50:40,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 561 flow. Second operand has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:40,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 507 [2023-01-28 03:50:40,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:40,941 INFO L130 PetriNetUnfolder]: 1118/1789 cut-off events. [2023-01-28 03:50:40,942 INFO L131 PetriNetUnfolder]: For 6844/6844 co-relation queries the response was YES. [2023-01-28 03:50:40,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7734 conditions, 1789 events. 1118/1789 cut-off events. For 6844/6844 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7126 event pairs, 400 based on Foata normal form. 60/1658 useless extension candidates. Maximal degree in co-relation 7706. Up to 1363 conditions per place. [2023-01-28 03:50:40,959 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 71 selfloop transitions, 4 changer transitions 1/76 dead transitions. [2023-01-28 03:50:40,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 706 flow [2023-01-28 03:50:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 03:50:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 03:50:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 694 transitions. [2023-01-28 03:50:40,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45627876397107164 [2023-01-28 03:50:40,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 694 transitions. [2023-01-28 03:50:40,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 694 transitions. [2023-01-28 03:50:40,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:40,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 694 transitions. [2023-01-28 03:50:40,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.33333333333334) internal successors, (694), 3 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 507.0) internal successors, (2028), 4 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,966 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 561 flow. Second operand 3 states and 694 transitions. [2023-01-28 03:50:40,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 706 flow [2023-01-28 03:50:40,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 76 transitions, 575 flow, removed 55 selfloop flow, removed 10 redundant places. [2023-01-28 03:50:40,985 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 422 flow [2023-01-28 03:50:40,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2023-01-28 03:50:40,987 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 44 predicate places. [2023-01-28 03:50:40,987 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 422 flow [2023-01-28 03:50:40,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.66666666666666) internal successors, (683), 3 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:40,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:40,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1] [2023-01-28 03:50:40,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 03:50:40,988 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 1 more)] === [2023-01-28 03:50:40,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -969831955, now seen corresponding path program 1 times [2023-01-28 03:50:40,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351537081] [2023-01-28 03:50:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:40,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:50:41,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:41,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351537081] [2023-01-28 03:50:41,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351537081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:41,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175277699] [2023-01-28 03:50:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:41,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:41,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:41,129 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) [2023-01-28 03:50:41,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 03:50:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:41,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:50:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:50:41,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:50:41,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175277699] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:41,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:41,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 03:50:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961844471] [2023-01-28 03:50:41,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:41,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:50:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:50:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-01-28 03:50:41,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 507 [2023-01-28 03:50:41,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 422 flow. Second operand has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:41,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:41,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 507 [2023-01-28 03:50:41,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:41,864 INFO L130 PetriNetUnfolder]: 1919/3133 cut-off events. [2023-01-28 03:50:41,864 INFO L131 PetriNetUnfolder]: For 8973/8973 co-relation queries the response was YES. [2023-01-28 03:50:41,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12256 conditions, 3133 events. 1919/3133 cut-off events. For 8973/8973 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14883 event pairs, 925 based on Foata normal form. 176/2969 useless extension candidates. Maximal degree in co-relation 12233. Up to 1742 conditions per place. [2023-01-28 03:50:41,882 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 98 selfloop transitions, 9 changer transitions 20/127 dead transitions. [2023-01-28 03:50:41,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 127 transitions, 1003 flow [2023-01-28 03:50:41,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 03:50:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 03:50:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1190 transitions. [2023-01-28 03:50:41,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39119000657462194 [2023-01-28 03:50:41,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1190 transitions. [2023-01-28 03:50:41,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1190 transitions. [2023-01-28 03:50:41,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:50:41,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1190 transitions. [2023-01-28 03:50:41,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:41,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:41,892 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 507.0) internal successors, (3549), 7 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:41,892 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 422 flow. Second operand 6 states and 1190 transitions. [2023-01-28 03:50:41,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 127 transitions, 1003 flow [2023-01-28 03:50:41,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 972 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-01-28 03:50:41,910 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 468 flow [2023-01-28 03:50:41,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2023-01-28 03:50:41,911 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 49 predicate places. [2023-01-28 03:50:41,911 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 468 flow [2023-01-28 03:50:41,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 191.0) internal successors, (2101), 11 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:41,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:50:41,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1] [2023-01-28 03:50:41,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 03:50:42,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:42,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:50:42,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:50:42,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1260700386, now seen corresponding path program 2 times [2023-01-28 03:50:42,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:50:42,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047202024] [2023-01-28 03:50:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:50:42,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:50:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:50:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:50:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047202024] [2023-01-28 03:50:43,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047202024] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:50:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715091348] [2023-01-28 03:50:43,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 03:50:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:50:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:50:43,526 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) [2023-01-28 03:50:43,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 03:50:43,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:50:43,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:50:43,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 03:50:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:50:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:50:44,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:50:44,406 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:44,407 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 44 treesize of output 31 [2023-01-28 03:50:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:44,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:50:44,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:44,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 190 [2023-01-28 03:50:44,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:50:44,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 97 [2023-01-28 03:50:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:50:46,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715091348] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:50:46,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:50:46,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 44 [2023-01-28 03:50:46,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89671822] [2023-01-28 03:50:46,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:50:46,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 03:50:46,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:50:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 03:50:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1712, Unknown=2, NotChecked=0, Total=1980 [2023-01-28 03:50:46,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-01-28 03:50:46,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 468 flow. Second operand has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:50:46,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:50:46,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-01-28 03:50:46,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:50:55,469 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 90 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:50:58,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:51:10,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:51:57,304 WARN L222 SmtUtils]: Spent 46.37s on a formula simplification. DAG size of input: 83 DAG size of output: 81 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:52:28,117 WARN L222 SmtUtils]: Spent 30.72s on a formula simplification. DAG size of input: 80 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:52:30,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:32,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:34,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:36,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:39,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:41,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:43,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:52:43,748 INFO L130 PetriNetUnfolder]: 2219/3785 cut-off events. [2023-01-28 03:52:43,749 INFO L131 PetriNetUnfolder]: For 10297/10297 co-relation queries the response was YES. [2023-01-28 03:52:43,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14392 conditions, 3785 events. 2219/3785 cut-off events. For 10297/10297 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20090 event pairs, 527 based on Foata normal form. 64/3482 useless extension candidates. Maximal degree in co-relation 14367. Up to 794 conditions per place. [2023-01-28 03:52:43,771 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 328 selfloop transitions, 111 changer transitions 29/468 dead transitions. [2023-01-28 03:52:43,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 468 transitions, 3345 flow [2023-01-28 03:52:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-28 03:52:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-28 03:52:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8852 transitions. [2023-01-28 03:52:43,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3063081767535209 [2023-01-28 03:52:43,790 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8852 transitions. [2023-01-28 03:52:43,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8852 transitions. [2023-01-28 03:52:43,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:52:43,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8852 transitions. [2023-01-28 03:52:43,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 155.2982456140351) internal successors, (8852), 57 states have internal predecessors, (8852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:43,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 507.0) internal successors, (29406), 58 states have internal predecessors, (29406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:43,906 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 507.0) internal successors, (29406), 58 states have internal predecessors, (29406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:43,906 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 468 flow. Second operand 57 states and 8852 transitions. [2023-01-28 03:52:43,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 468 transitions, 3345 flow [2023-01-28 03:52:43,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 468 transitions, 3242 flow, removed 43 selfloop flow, removed 3 redundant places. [2023-01-28 03:52:43,933 INFO L231 Difference]: Finished difference. Result has 165 places, 184 transitions, 1712 flow [2023-01-28 03:52:43,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1712, PETRI_PLACES=165, PETRI_TRANSITIONS=184} [2023-01-28 03:52:43,934 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 130 predicate places. [2023-01-28 03:52:43,934 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 184 transitions, 1712 flow [2023-01-28 03:52:43,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 149.93333333333334) internal successors, (6747), 45 states have internal predecessors, (6747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:43,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:52:43,936 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1] [2023-01-28 03:52:43,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 03:52:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 03:52:44,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:52:44,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:52:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash -716681592, now seen corresponding path program 3 times [2023-01-28 03:52:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:52:44,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773186382] [2023-01-28 03:52:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:52:44,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:52:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:52:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:52:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:52:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773186382] [2023-01-28 03:52:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773186382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:52:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577716534] [2023-01-28 03:52:45,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 03:52:45,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:52:45,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:52:45,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:52:45,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 03:52:46,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 03:52:46,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:52:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 03:52:46,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:52:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:52:46,458 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 03:52:46,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2023-01-28 03:52:46,467 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 31 treesize of output 17 [2023-01-28 03:52:46,540 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 23 treesize of output 7 [2023-01-28 03:52:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:52:46,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:52:46,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:52:46,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 122 [2023-01-28 03:52:46,908 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 9 treesize of output 3 [2023-01-28 03:52:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 03:52:47,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577716534] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:52:47,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:52:47,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 40 [2023-01-28 03:52:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475395832] [2023-01-28 03:52:47,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:52:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 03:52:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:52:47,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 03:52:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1466, Unknown=8, NotChecked=0, Total=1640 [2023-01-28 03:52:47,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-01-28 03:52:47,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 184 transitions, 1712 flow. Second operand has 41 states, 41 states have (on average 147.1951219512195) internal successors, (6035), 41 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:52:47,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:52:47,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-01-28 03:52:47,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:52:53,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:52:56,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:52:59,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:05,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:08,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:12,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:15,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:18,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:21,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:53:42,907 INFO L130 PetriNetUnfolder]: 19480/31096 cut-off events. [2023-01-28 03:53:42,907 INFO L131 PetriNetUnfolder]: For 227069/227069 co-relation queries the response was YES. [2023-01-28 03:53:43,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159452 conditions, 31096 events. 19480/31096 cut-off events. For 227069/227069 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 221463 event pairs, 2387 based on Foata normal form. 2480/32564 useless extension candidates. Maximal degree in co-relation 159401. Up to 7093 conditions per place. [2023-01-28 03:53:43,206 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1512 selfloop transitions, 949 changer transitions 286/2747 dead transitions. [2023-01-28 03:53:43,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2747 transitions, 27851 flow [2023-01-28 03:53:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2023-01-28 03:53:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2023-01-28 03:53:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 32980 transitions. [2023-01-28 03:53:43,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30255492867299666 [2023-01-28 03:53:43,256 INFO L72 ComplementDD]: Start complementDD. Operand 215 states and 32980 transitions. [2023-01-28 03:53:43,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 215 states and 32980 transitions. [2023-01-28 03:53:43,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:53:43,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 215 states and 32980 transitions. [2023-01-28 03:53:43,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 216 states, 215 states have (on average 153.3953488372093) internal successors, (32980), 215 states have internal predecessors, (32980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 216 states, 216 states have (on average 507.0) internal successors, (109512), 216 states have internal predecessors, (109512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,421 INFO L81 ComplementDD]: Finished complementDD. Result has 216 states, 216 states have (on average 507.0) internal successors, (109512), 216 states have internal predecessors, (109512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:43,421 INFO L175 Difference]: Start difference. First operand has 165 places, 184 transitions, 1712 flow. Second operand 215 states and 32980 transitions. [2023-01-28 03:53:43,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 2747 transitions, 27851 flow [2023-01-28 03:53:44,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2747 transitions, 24574 flow, removed 1587 selfloop flow, removed 8 redundant places. [2023-01-28 03:53:44,408 INFO L231 Difference]: Finished difference. Result has 492 places, 1168 transitions, 13853 flow [2023-01-28 03:53:44,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=215, PETRI_FLOW=13853, PETRI_PLACES=492, PETRI_TRANSITIONS=1168} [2023-01-28 03:53:44,409 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 457 predicate places. [2023-01-28 03:53:44,409 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1168 transitions, 13853 flow [2023-01-28 03:53:44,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 147.1951219512195) internal successors, (6035), 41 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:53:44,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:53:44,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1] [2023-01-28 03:53:44,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 03:53:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:53:44,617 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:53:44,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:53:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1581646834, now seen corresponding path program 4 times [2023-01-28 03:53:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:53:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288595218] [2023-01-28 03:53:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:53:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:53:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:53:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:53:46,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:53:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288595218] [2023-01-28 03:53:46,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288595218] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:53:46,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138895381] [2023-01-28 03:53:46,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 03:53:46,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:53:46,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:53:46,473 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:53:46,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 03:53:46,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 03:53:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:53:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 03:53:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:53:47,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:53:47,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:53:47,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:53:47,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:53:47,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:53:47,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-01-28 03:53:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:53:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:53:48,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:53:48,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 516 treesize of output 528 [2023-01-28 03:53:48,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:53:48,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 365 [2023-01-28 03:53:48,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:53:48,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 304 treesize of output 290 [2023-01-28 03:54:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:54:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138895381] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:54:05,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:54:05,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 47 [2023-01-28 03:54:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378523790] [2023-01-28 03:54:05,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:54:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 03:54:05,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:54:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 03:54:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1998, Unknown=3, NotChecked=0, Total=2256 [2023-01-28 03:54:05,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 507 [2023-01-28 03:54:05,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1168 transitions, 13853 flow. Second operand has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:05,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:54:05,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 507 [2023-01-28 03:54:05,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:54:23,948 INFO L130 PetriNetUnfolder]: 15844/25670 cut-off events. [2023-01-28 03:54:23,948 INFO L131 PetriNetUnfolder]: For 3117213/3117213 co-relation queries the response was YES. [2023-01-28 03:54:24,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253655 conditions, 25670 events. 15844/25670 cut-off events. For 3117213/3117213 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 181215 event pairs, 4322 based on Foata normal form. 374/25136 useless extension candidates. Maximal degree in co-relation 253480. Up to 13750 conditions per place. [2023-01-28 03:54:24,487 INFO L137 encePairwiseOnDemand]: 488/507 looper letters, 853 selfloop transitions, 486 changer transitions 50/1389 dead transitions. [2023-01-28 03:54:24,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 1389 transitions, 19886 flow [2023-01-28 03:54:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 03:54:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 03:54:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 7287 transitions. [2023-01-28 03:54:24,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2994329388560158 [2023-01-28 03:54:24,500 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 7287 transitions. [2023-01-28 03:54:24,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 7287 transitions. [2023-01-28 03:54:24,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:54:24,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 7287 transitions. [2023-01-28 03:54:24,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 151.8125) internal successors, (7287), 48 states have internal predecessors, (7287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:24,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 507.0) internal successors, (24843), 49 states have internal predecessors, (24843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:24,542 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 507.0) internal successors, (24843), 49 states have internal predecessors, (24843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:24,542 INFO L175 Difference]: Start difference. First operand has 492 places, 1168 transitions, 13853 flow. Second operand 48 states and 7287 transitions. [2023-01-28 03:54:24,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 1389 transitions, 19886 flow [2023-01-28 03:54:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1389 transitions, 17200 flow, removed 1211 selfloop flow, removed 62 redundant places. [2023-01-28 03:54:36,056 INFO L231 Difference]: Finished difference. Result has 478 places, 1073 transitions, 13008 flow [2023-01-28 03:54:36,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=13008, PETRI_PLACES=478, PETRI_TRANSITIONS=1073} [2023-01-28 03:54:36,057 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 443 predicate places. [2023-01-28 03:54:36,057 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1073 transitions, 13008 flow [2023-01-28 03:54:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 146.89583333333334) internal successors, (7051), 48 states have internal predecessors, (7051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:36,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:54:36,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1] [2023-01-28 03:54:36,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 03:54:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:54:36,259 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:54:36,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:54:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash -861947296, now seen corresponding path program 5 times [2023-01-28 03:54:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:54:36,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176039244] [2023-01-28 03:54:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:54:36,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:54:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:54:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 03:54:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:54:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176039244] [2023-01-28 03:54:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176039244] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:54:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581669475] [2023-01-28 03:54:37,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 03:54:37,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:54:37,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:54:37,675 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) [2023-01-28 03:54:37,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 03:54:37,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 03:54:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:54:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 03:54:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:54:37,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:54:37,963 INFO L321 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-01-28 03:54:37,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2023-01-28 03:54:38,116 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-01-28 03:54:38,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:54:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:54:38,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 03:54:38,726 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 03:54:38,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 42 [2023-01-28 03:54:38,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-01-28 03:54:38,831 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 23 treesize of output 7 [2023-01-28 03:54:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:54:38,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:54:39,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:54:39,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 262 treesize of output 298 [2023-01-28 03:54:39,466 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:54:39,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 111 [2023-01-28 03:54:39,482 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 32 treesize of output 20 [2023-01-28 03:54:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 03:54:42,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581669475] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 03:54:42,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 03:54:42,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 15] total 45 [2023-01-28 03:54:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461764540] [2023-01-28 03:54:42,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 03:54:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 03:54:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:54:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 03:54:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1884, Unknown=7, NotChecked=0, Total=2070 [2023-01-28 03:54:42,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 507 [2023-01-28 03:54:42,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1073 transitions, 13008 flow. Second operand has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:54:42,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:54:42,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 507 [2023-01-28 03:54:42,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:54:55,957 WARN L222 SmtUtils]: Spent 11.05s on a formula simplification. DAG size of input: 102 DAG size of output: 89 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:55:11,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:55:14,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-01-28 03:55:37,434 WARN L222 SmtUtils]: Spent 21.03s on a formula simplification. DAG size of input: 112 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 03:55:47,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:55:48,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:55:49,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:55:51,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:16,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:18,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:20,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:22,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:25,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:29,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:31,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:33,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:35,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:37,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:39,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:41,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:43,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:44,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:46,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:48,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:51,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 03:56:59,313 INFO L130 PetriNetUnfolder]: 21897/35487 cut-off events. [2023-01-28 03:56:59,314 INFO L131 PetriNetUnfolder]: For 1721891/1721891 co-relation queries the response was YES. [2023-01-28 03:56:59,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301837 conditions, 35487 events. 21897/35487 cut-off events. For 1721891/1721891 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 264125 event pairs, 5917 based on Foata normal form. 98/34441 useless extension candidates. Maximal degree in co-relation 301689. Up to 15201 conditions per place. [2023-01-28 03:57:00,097 INFO L137 encePairwiseOnDemand]: 490/507 looper letters, 1250 selfloop transitions, 874 changer transitions 30/2154 dead transitions. [2023-01-28 03:57:00,097 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2154 transitions, 30827 flow [2023-01-28 03:57:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-01-28 03:57:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-01-28 03:57:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 11691 transitions. [2023-01-28 03:57:00,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27782134454979684 [2023-01-28 03:57:00,111 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 11691 transitions. [2023-01-28 03:57:00,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 11691 transitions. [2023-01-28 03:57:00,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:57:00,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 11691 transitions. [2023-01-28 03:57:00,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 140.85542168674698) internal successors, (11691), 83 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:00,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:00,161 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 507.0) internal successors, (42588), 84 states have internal predecessors, (42588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:00,161 INFO L175 Difference]: Start difference. First operand has 478 places, 1073 transitions, 13008 flow. Second operand 83 states and 11691 transitions. [2023-01-28 03:57:00,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2154 transitions, 30827 flow [2023-01-28 03:57:17,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 2154 transitions, 29607 flow, removed 508 selfloop flow, removed 16 redundant places. [2023-01-28 03:57:17,783 INFO L231 Difference]: Finished difference. Result has 581 places, 1555 transitions, 22236 flow [2023-01-28 03:57:17,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=12489, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=22236, PETRI_PLACES=581, PETRI_TRANSITIONS=1555} [2023-01-28 03:57:17,784 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 546 predicate places. [2023-01-28 03:57:17,784 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 1555 transitions, 22236 flow [2023-01-28 03:57:17,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 135.84782608695653) internal successors, (6249), 46 states have internal predecessors, (6249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:17,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:57:17,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1] [2023-01-28 03:57:17,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 03:57:17,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 03:57:17,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:57:17,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:57:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash -148778941, now seen corresponding path program 6 times [2023-01-28 03:57:17,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:57:17,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712124328] [2023-01-28 03:57:17,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:57:17,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:57:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:57:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 03:57:18,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:57:18,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712124328] [2023-01-28 03:57:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712124328] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:57:18,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588220724] [2023-01-28 03:57:18,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:57:18,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:57:18,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:57:18,175 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:57:18,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 03:57:18,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:57:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:57:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 03:57:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:57:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 03:57:18,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 03:57:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588220724] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:57:18,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 03:57:18,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-01-28 03:57:18,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307357338] [2023-01-28 03:57:18,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:57:18,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 03:57:18,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:57:18,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 03:57:18,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-28 03:57:18,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 507 [2023-01-28 03:57:18,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 1555 transitions, 22236 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:18,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:57:18,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 507 [2023-01-28 03:57:18,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:57:38,810 INFO L130 PetriNetUnfolder]: 30865/48775 cut-off events. [2023-01-28 03:57:38,810 INFO L131 PetriNetUnfolder]: For 3541024/3541024 co-relation queries the response was YES. [2023-01-28 03:57:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475072 conditions, 48775 events. 30865/48775 cut-off events. For 3541024/3541024 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 364302 event pairs, 6581 based on Foata normal form. 1844/47889 useless extension candidates. Maximal degree in co-relation 474888. Up to 19022 conditions per place. [2023-01-28 03:57:40,474 INFO L137 encePairwiseOnDemand]: 503/507 looper letters, 1552 selfloop transitions, 203 changer transitions 67/1822 dead transitions. [2023-01-28 03:57:40,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1822 transitions, 29926 flow [2023-01-28 03:57:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 03:57:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 03:57:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 953 transitions. [2023-01-28 03:57:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46992110453648916 [2023-01-28 03:57:40,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 953 transitions. [2023-01-28 03:57:40,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 953 transitions. [2023-01-28 03:57:40,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:57:40,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 953 transitions. [2023-01-28 03:57:40,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:40,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:40,478 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 507.0) internal successors, (2535), 5 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:57:40,478 INFO L175 Difference]: Start difference. First operand has 581 places, 1555 transitions, 22236 flow. Second operand 4 states and 953 transitions. [2023-01-28 03:57:40,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1822 transitions, 29926 flow [2023-01-28 03:58:32,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 1822 transitions, 28005 flow, removed 718 selfloop flow, removed 47 redundant places. [2023-01-28 03:58:32,109 INFO L231 Difference]: Finished difference. Result has 499 places, 1218 transitions, 16929 flow [2023-01-28 03:58:32,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=16274, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=16929, PETRI_PLACES=499, PETRI_TRANSITIONS=1218} [2023-01-28 03:58:32,111 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 464 predicate places. [2023-01-28 03:58:32,111 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1218 transitions, 16929 flow [2023-01-28 03:58:32,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:32,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:58:32,111 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 03:58:32,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 03:58:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 03:58:32,312 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:58:32,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:58:32,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1614662093, now seen corresponding path program 6 times [2023-01-28 03:58:32,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:58:32,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493936417] [2023-01-28 03:58:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:58:32,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:58:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:58:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 03:58:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:58:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493936417] [2023-01-28 03:58:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493936417] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:58:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453814537] [2023-01-28 03:58:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 03:58:34,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:58:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:58:34,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:58:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 03:58:34,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 03:58:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 03:58:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 03:58:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:58:34,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:58:34,877 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 [2023-01-28 03:58:34,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:58:34,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 03:58:34,997 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 23 treesize of output 7 [2023-01-28 03:58:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-01-28 03:58:35,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 03:58:35,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453814537] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 03:58:35,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 03:58:35,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2023-01-28 03:58:35,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549309791] [2023-01-28 03:58:35,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:58:35,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 03:58:35,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:58:35,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 03:58:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-01-28 03:58:35,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 507 [2023-01-28 03:58:35,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1218 transitions, 16929 flow. Second operand has 9 states, 9 states have (on average 191.22222222222223) internal successors, (1721), 9 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:35,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:58:35,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 507 [2023-01-28 03:58:35,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:58:52,308 INFO L130 PetriNetUnfolder]: 31691/49173 cut-off events. [2023-01-28 03:58:52,308 INFO L131 PetriNetUnfolder]: For 1844280/1844280 co-relation queries the response was YES. [2023-01-28 03:58:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438687 conditions, 49173 events. 31691/49173 cut-off events. For 1844280/1844280 co-relation queries the response was YES. Maximal size of possible extension queue 1527. Compared 350703 event pairs, 4953 based on Foata normal form. 58/46411 useless extension candidates. Maximal degree in co-relation 438531. Up to 34481 conditions per place. [2023-01-28 03:58:53,474 INFO L137 encePairwiseOnDemand]: 502/507 looper letters, 1154 selfloop transitions, 152 changer transitions 12/1318 dead transitions. [2023-01-28 03:58:53,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1318 transitions, 21406 flow [2023-01-28 03:58:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 03:58:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 03:58:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1372 transitions. [2023-01-28 03:58:53,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3865877712031558 [2023-01-28 03:58:53,477 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1372 transitions. [2023-01-28 03:58:53,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1372 transitions. [2023-01-28 03:58:53,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:58:53,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1372 transitions. [2023-01-28 03:58:53,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 196.0) internal successors, (1372), 7 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:53,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:53,481 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 507.0) internal successors, (4056), 8 states have internal predecessors, (4056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:58:53,481 INFO L175 Difference]: Start difference. First operand has 499 places, 1218 transitions, 16929 flow. Second operand 7 states and 1372 transitions. [2023-01-28 03:58:53,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1318 transitions, 21406 flow [2023-01-28 03:59:13,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1318 transitions, 20570 flow, removed 370 selfloop flow, removed 16 redundant places. [2023-01-28 03:59:13,090 INFO L231 Difference]: Finished difference. Result has 465 places, 1181 transitions, 16300 flow [2023-01-28 03:59:13,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15681, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16300, PETRI_PLACES=465, PETRI_TRANSITIONS=1181} [2023-01-28 03:59:13,092 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 430 predicate places. [2023-01-28 03:59:13,092 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 1181 transitions, 16300 flow [2023-01-28 03:59:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 191.22222222222223) internal successors, (1721), 9 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:13,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 03:59:13,092 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1] [2023-01-28 03:59:13,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 03:59:13,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 03:59:13,299 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 03:59:13,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 03:59:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -135173787, now seen corresponding path program 7 times [2023-01-28 03:59:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 03:59:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141614030] [2023-01-28 03:59:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 03:59:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 03:59:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 03:59:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 03:59:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141614030] [2023-01-28 03:59:15,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141614030] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893118796] [2023-01-28 03:59:15,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 03:59:15,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 03:59:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 03:59:15,973 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 03:59:15,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 03:59:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 03:59:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 03:59:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 03:59:16,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:59:16,511 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 [2023-01-28 03:59:16,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 03:59:16,594 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 [2023-01-28 03:59:16,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:16,958 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 44 treesize of output 32 [2023-01-28 03:59:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 03:59:17,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 03:59:19,408 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_964 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_964))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))))))) is different from false [2023-01-28 03:59:19,455 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_964 (Array Int Int)) (v_ArrVal_963 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_963) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_964))) (let ((.cse0 (select .cse1 ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (< (+ (select .cse0 (+ ~q2~0.offset (* c_~q2_back~0 4))) 1) (select (select .cse1 c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))))) is different from false [2023-01-28 03:59:19,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:19,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1042 treesize of output 982 [2023-01-28 03:59:19,651 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:19,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 401 treesize of output 387 [2023-01-28 03:59:19,697 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 03:59:19,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 358 treesize of output 290 [2023-01-28 03:59:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 03:59:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893118796] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 03:59:36,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 03:59:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [20, 11] total 38 [2023-01-28 03:59:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997194909] [2023-01-28 03:59:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 03:59:36,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 03:59:36,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 03:59:36,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 03:59:36,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1220, Unknown=3, NotChecked=142, Total=1482 [2023-01-28 03:59:36,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 507 [2023-01-28 03:59:36,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 1181 transitions, 16300 flow. Second operand has 11 states, 11 states have (on average 180.8181818181818) internal successors, (1989), 11 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:36,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 03:59:36,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 507 [2023-01-28 03:59:36,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 03:59:36,961 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~q2_front~0 4)) (.cse2 (* c_~q2_back~0 4)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q1~0.base)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse0 (select |c_#memory_int| ~q2~0.base))) (or (< 0 (select .cse0 (+ ~q2~0.offset .cse1))) (< (+ (select .cse0 (+ ~q2~0.offset .cse2)) 1) (select (select |c_#memory_int| c_~q1~0.base) .cse3))))) (forall ((v_ArrVal_964 (Array Int Int)) (v_ArrVal_963 (Array Int Int)) (~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_963) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_964))) (let ((.cse4 (select .cse5 ~q2~0.base))) (or (< 0 (select .cse4 (+ ~q2~0.offset .cse1))) (< (+ (select .cse4 (+ ~q2~0.offset .cse2)) 1) (select (select .cse5 c_~q1~0.base) .cse3)))))) (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| c_~q1~0.base)))) is different from false [2023-01-28 03:59:53,667 INFO L130 PetriNetUnfolder]: 32313/50569 cut-off events. [2023-01-28 03:59:53,667 INFO L131 PetriNetUnfolder]: For 1750689/1750689 co-relation queries the response was YES. [2023-01-28 03:59:54,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429883 conditions, 50569 events. 32313/50569 cut-off events. For 1750689/1750689 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 368414 event pairs, 6518 based on Foata normal form. 34/47783 useless extension candidates. Maximal degree in co-relation 429740. Up to 31318 conditions per place. [2023-01-28 03:59:54,794 INFO L137 encePairwiseOnDemand]: 492/507 looper letters, 867 selfloop transitions, 601 changer transitions 0/1468 dead transitions. [2023-01-28 03:59:54,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 1468 transitions, 23798 flow [2023-01-28 03:59:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 03:59:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 03:59:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1858 transitions. [2023-01-28 03:59:54,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36646942800788956 [2023-01-28 03:59:54,796 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1858 transitions. [2023-01-28 03:59:54,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1858 transitions. [2023-01-28 03:59:54,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 03:59:54,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1858 transitions. [2023-01-28 03:59:54,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 185.8) internal successors, (1858), 10 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:54,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:54,802 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 507.0) internal successors, (5577), 11 states have internal predecessors, (5577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 03:59:54,802 INFO L175 Difference]: Start difference. First operand has 465 places, 1181 transitions, 16300 flow. Second operand 10 states and 1858 transitions. [2023-01-28 03:59:54,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 1468 transitions, 23798 flow [2023-01-28 04:00:17,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1468 transitions, 23457 flow, removed 34 selfloop flow, removed 8 redundant places. [2023-01-28 04:00:17,422 INFO L231 Difference]: Finished difference. Result has 468 places, 1392 transitions, 22252 flow [2023-01-28 04:00:17,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=15993, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=416, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=22252, PETRI_PLACES=468, PETRI_TRANSITIONS=1392} [2023-01-28 04:00:17,423 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 433 predicate places. [2023-01-28 04:00:17,424 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1392 transitions, 22252 flow [2023-01-28 04:00:17,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 180.8181818181818) internal successors, (1989), 11 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:00:17,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:00:17,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 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, 1] [2023-01-28 04:00:17,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 04:00:17,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 04:00:17,626 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:00:17,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:00:17,626 INFO L85 PathProgramCache]: Analyzing trace with hash 949483153, now seen corresponding path program 8 times [2023-01-28 04:00:17,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:00:17,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528443752] [2023-01-28 04:00:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:00:17,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:00:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:00:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:00:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:00:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528443752] [2023-01-28 04:00:20,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528443752] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:00:20,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140904279] [2023-01-28 04:00:20,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:00:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:00:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:00:20,008 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:00:20,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 04:00:20,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:00:20,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:00:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 04:00:20,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:00:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:00:20,850 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 [2023-01-28 04:00:20,966 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 23 treesize of output 7 [2023-01-28 04:00:21,181 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 23 treesize of output 7 [2023-01-28 04:00:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:00:21,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:00:21,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:00:21,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-01-28 04:00:22,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:00:22,045 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 46 treesize of output 38 [2023-01-28 04:00:22,051 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 26 treesize of output 20 [2023-01-28 04:00:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 04:00:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140904279] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:00:22,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:00:22,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 42 [2023-01-28 04:00:22,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71828929] [2023-01-28 04:00:22,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:00:22,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 04:00:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:00:22,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 04:00:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2023-01-28 04:00:22,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 507 [2023-01-28 04:00:22,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1392 transitions, 22252 flow. Second operand has 43 states, 43 states have (on average 150.06976744186048) internal successors, (6453), 43 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:00:22,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:00:22,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 507 [2023-01-28 04:00:22,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:01:13,779 INFO L130 PetriNetUnfolder]: 58977/90493 cut-off events. [2023-01-28 04:01:13,779 INFO L131 PetriNetUnfolder]: For 3236361/3236361 co-relation queries the response was YES. [2023-01-28 04:01:15,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815382 conditions, 90493 events. 58977/90493 cut-off events. For 3236361/3236361 co-relation queries the response was YES. Maximal size of possible extension queue 3009. Compared 698416 event pairs, 4672 based on Foata normal form. 5576/90419 useless extension candidates. Maximal degree in co-relation 815239. Up to 23803 conditions per place. [2023-01-28 04:01:15,980 INFO L137 encePairwiseOnDemand]: 493/507 looper letters, 1434 selfloop transitions, 1577 changer transitions 157/3168 dead transitions. [2023-01-28 04:01:15,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 3168 transitions, 56112 flow [2023-01-28 04:01:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-01-28 04:01:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-01-28 04:01:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 11873 transitions. [2023-01-28 04:01:15,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.308133499429046 [2023-01-28 04:01:15,991 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 11873 transitions. [2023-01-28 04:01:15,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 11873 transitions. [2023-01-28 04:01:15,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:01:15,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 11873 transitions. [2023-01-28 04:01:16,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 156.22368421052633) internal successors, (11873), 76 states have internal predecessors, (11873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:01:16,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 507.0) internal successors, (39039), 77 states have internal predecessors, (39039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:01:16,035 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 507.0) internal successors, (39039), 77 states have internal predecessors, (39039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:01:16,035 INFO L175 Difference]: Start difference. First operand has 468 places, 1392 transitions, 22252 flow. Second operand 76 states and 11873 transitions. [2023-01-28 04:01:16,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 3168 transitions, 56112 flow [2023-01-28 04:01:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 3168 transitions, 55227 flow, removed 261 selfloop flow, removed 4 redundant places. [2023-01-28 04:01:57,192 INFO L231 Difference]: Finished difference. Result has 570 places, 2240 transitions, 40970 flow [2023-01-28 04:01:57,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=507, PETRI_DIFFERENCE_MINUEND_FLOW=21720, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=40970, PETRI_PLACES=570, PETRI_TRANSITIONS=2240} [2023-01-28 04:01:57,194 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 535 predicate places. [2023-01-28 04:01:57,194 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 2240 transitions, 40970 flow [2023-01-28 04:01:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 150.06976744186048) internal successors, (6453), 43 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:01:57,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:01:57,196 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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, 1] [2023-01-28 04:01:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 04:01:57,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:01:57,402 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:01:57,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:01:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1495440064, now seen corresponding path program 1 times [2023-01-28 04:01:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:01:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535364039] [2023-01-28 04:01:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:01:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:01:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:01:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:01:57,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:01:57,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535364039] [2023-01-28 04:01:57,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535364039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:01:57,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629743377] [2023-01-28 04:01:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:01:57,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:01:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:01:57,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:01:57,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 04:01:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:01:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:01:57,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:01:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:01:57,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:01:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:01:57,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629743377] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:01:57,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:01:57,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-01-28 04:01:57,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17630984] [2023-01-28 04:01:57,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:01:57,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:01:57,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:01:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:01:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:01:57,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 507 [2023-01-28 04:01:57,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 2240 transitions, 40970 flow. Second operand has 11 states, 11 states have (on average 191.54545454545453) internal successors, (2107), 11 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:01:57,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:01:57,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 507 [2023-01-28 04:01:57,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand