/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:04:21,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:04:21,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:04:21,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:04:21,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:04:21,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:04:21,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:04:21,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:04:21,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:04:21,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:04:21,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:04:21,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:04:21,599 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:04:21,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:04:21,602 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:04:21,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:04:21,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:04:21,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:04:21,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:04:21,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:04:21,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:04:21,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:04:21,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:04:21,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:04:21,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:04:21,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:04:21,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:04:21,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:04:21,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:04:21,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:04:21,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:04:21,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:04:21,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:04:21,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:04:21,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:04:21,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:04:21,630 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 [2023-01-27 21:04:21,645 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:04:21,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:04:21,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:04:21,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:04:21,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:04:21,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:04:21,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:04:21,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:04:21,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:04:21,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:04:21,649 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:04:21,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:04:21,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:04:21,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:04:21,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:04:21,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:04:21,895 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:04:21,896 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:04:21,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-01-27 21:04:22,979 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:04:23,143 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:04:23,143 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c [2023-01-27 21:04:23,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56ea80186/96ea11126a954a68812ffc5c8b95a261/FLAG3e98ddfbe [2023-01-27 21:04:23,160 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56ea80186/96ea11126a954a68812ffc5c8b95a261 [2023-01-27 21:04:23,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:04:23,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:04:23,172 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:04:23,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:04:23,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:04:23,175 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd7f2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23, skipping insertion in model container [2023-01-27 21:04:23,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:04:23,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:04:23,331 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-01-27 21:04:23,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:04:23,345 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:04:23,367 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2023-01-27 21:04:23,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:04:23,378 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:04:23,378 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:04:23,386 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:04:23,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23 WrapperNode [2023-01-27 21:04:23,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:04:23,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:04:23,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:04:23,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:04:23,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,413 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,439 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 311 [2023-01-27 21:04:23,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:04:23,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:04:23,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:04:23,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:04:23,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:04:23,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:04:23,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:04:23,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:04:23,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (1/1) ... [2023-01-27 21:04:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:04:23,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:04:23,506 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) [2023-01-27 21:04:23,533 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 [2023-01-27 21:04:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:04:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:04:23,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:04:23,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:04:23,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:04:23,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:04:23,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:04:23,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 21:04:23,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-27 21:04:23,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:04:23,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:04:23,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:04:23,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:04:23,568 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:04:23,679 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:04:23,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:04:24,039 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:04:24,205 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:04:24,205 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-27 21:04:24,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:04:24 BoogieIcfgContainer [2023-01-27 21:04:24,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:04:24,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:04:24,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:04:24,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:04:24,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:04:23" (1/3) ... [2023-01-27 21:04:24,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6227be6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:04:24, skipping insertion in model container [2023-01-27 21:04:24,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:04:23" (2/3) ... [2023-01-27 21:04:24,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6227be6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:04:24, skipping insertion in model container [2023-01-27 21:04:24,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:04:24" (3/3) ... [2023-01-27 21:04:24,219 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2023-01-27 21:04:24,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:04:24,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:04:24,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:04:24,315 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 21:04:24,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 206 transitions, 444 flow [2023-01-27 21:04:24,442 INFO L130 PetriNetUnfolder]: 15/202 cut-off events. [2023-01-27 21:04:24,443 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:04:24,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 202 events. 15/202 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 140 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-01-27 21:04:24,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 206 transitions, 444 flow [2023-01-27 21:04:24,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 188 places, 190 transitions, 404 flow [2023-01-27 21:04:24,461 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:04:24,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 190 transitions, 404 flow [2023-01-27 21:04:24,473 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 190 transitions, 404 flow [2023-01-27 21:04:24,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 190 transitions, 404 flow [2023-01-27 21:04:24,504 INFO L130 PetriNetUnfolder]: 15/190 cut-off events. [2023-01-27 21:04:24,504 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:04:24,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 190 events. 15/190 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 163. Up to 2 conditions per place. [2023-01-27 21:04:24,507 INFO L119 LiptonReduction]: Number of co-enabled transitions 2520 [2023-01-27 21:04:30,365 INFO L134 LiptonReduction]: Checked pairs total: 4288 [2023-01-27 21:04:30,365 INFO L136 LiptonReduction]: Total number of compositions: 194 [2023-01-27 21:04:30,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:04:30,383 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;@11fee58d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:04:30,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 21:04:30,390 INFO L130 PetriNetUnfolder]: 5/30 cut-off events. [2023-01-27 21:04:30,390 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 21:04:30,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:30,390 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] [2023-01-27 21:04:30,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:30,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:30,395 INFO L85 PathProgramCache]: Analyzing trace with hash 464994653, now seen corresponding path program 1 times [2023-01-27 21:04:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107537640] [2023-01-27 21:04:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:30,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:31,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107537640] [2023-01-27 21:04:31,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107537640] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:04:31,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:04:31,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-27 21:04:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532477294] [2023-01-27 21:04:31,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:04:31,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:04:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:31,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:04:31,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:04:31,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-01-27 21:04:31,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:31,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-01-27 21:04:31,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:31,380 INFO L130 PetriNetUnfolder]: 1952/2593 cut-off events. [2023-01-27 21:04:31,381 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2023-01-27 21:04:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5430 conditions, 2593 events. 1952/2593 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9346 event pairs, 624 based on Foata normal form. 1/1889 useless extension candidates. Maximal degree in co-relation 4200. Up to 1650 conditions per place. [2023-01-27 21:04:31,398 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 51 selfloop transitions, 5 changer transitions 1/57 dead transitions. [2023-01-27 21:04:31,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 57 transitions, 273 flow [2023-01-27 21:04:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:04:31,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:04:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 577 transitions. [2023-01-27 21:04:31,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48083333333333333 [2023-01-27 21:04:31,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 577 transitions. [2023-01-27 21:04:31,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 577 transitions. [2023-01-27 21:04:31,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:31,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 577 transitions. [2023-01-27 21:04:31,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,428 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 86 flow. Second operand 3 states and 577 transitions. [2023-01-27 21:04:31,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 57 transitions, 273 flow [2023-01-27 21:04:31,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 243 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 21:04:31,438 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 103 flow [2023-01-27 21:04:31,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-01-27 21:04:31,445 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-01-27 21:04:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 103 flow [2023-01-27 21:04:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:31,446 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] [2023-01-27 21:04:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:04:31,446 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:31,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1582094128, now seen corresponding path program 1 times [2023-01-27 21:04:31,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:31,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189932436] [2023-01-27 21:04:31,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:31,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:31,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189932436] [2023-01-27 21:04:31,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189932436] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:04:31,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:04:31,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:04:31,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806041580] [2023-01-27 21:04:31,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:04:31,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:04:31,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:04:31,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:04:31,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 400 [2023-01-27 21:04:31,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:31,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:31,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 400 [2023-01-27 21:04:31,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:32,079 INFO L130 PetriNetUnfolder]: 2683/3652 cut-off events. [2023-01-27 21:04:32,079 INFO L131 PetriNetUnfolder]: For 753/753 co-relation queries the response was YES. [2023-01-27 21:04:32,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8759 conditions, 3652 events. 2683/3652 cut-off events. For 753/753 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13796 event pairs, 1920 based on Foata normal form. 1/2761 useless extension candidates. Maximal degree in co-relation 2969. Up to 2594 conditions per place. [2023-01-27 21:04:32,094 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 34 selfloop transitions, 2 changer transitions 26/62 dead transitions. [2023-01-27 21:04:32,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 302 flow [2023-01-27 21:04:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:04:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:04:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-01-27 21:04:32,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436875 [2023-01-27 21:04:32,100 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-01-27 21:04:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-01-27 21:04:32,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:32,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-01-27 21:04:32,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,109 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 103 flow. Second operand 4 states and 699 transitions. [2023-01-27 21:04:32,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 302 flow [2023-01-27 21:04:32,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 62 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:04:32,113 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 116 flow [2023-01-27 21:04:32,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-01-27 21:04:32,113 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-01-27 21:04:32,114 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 116 flow [2023-01-27 21:04:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:32,114 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] [2023-01-27 21:04:32,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:04:32,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:32,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1000104662, now seen corresponding path program 1 times [2023-01-27 21:04:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:32,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870675094] [2023-01-27 21:04:32,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:32,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:04:32,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:32,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870675094] [2023-01-27 21:04:32,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870675094] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:04:32,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:04:32,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 21:04:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540995661] [2023-01-27 21:04:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:04:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:04:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:04:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 21:04:32,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 400 [2023-01-27 21:04:32,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,298 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:32,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 400 [2023-01-27 21:04:32,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:32,879 INFO L130 PetriNetUnfolder]: 4054/5356 cut-off events. [2023-01-27 21:04:32,879 INFO L131 PetriNetUnfolder]: For 1510/1510 co-relation queries the response was YES. [2023-01-27 21:04:32,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13107 conditions, 5356 events. 4054/5356 cut-off events. For 1510/1510 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21895 event pairs, 826 based on Foata normal form. 1/4625 useless extension candidates. Maximal degree in co-relation 13094. Up to 2129 conditions per place. [2023-01-27 21:04:32,902 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 84 selfloop transitions, 8 changer transitions 1/93 dead transitions. [2023-01-27 21:04:32,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 472 flow [2023-01-27 21:04:32,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:04:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:04:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 773 transitions. [2023-01-27 21:04:32,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483125 [2023-01-27 21:04:32,906 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 773 transitions. [2023-01-27 21:04:32,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 773 transitions. [2023-01-27 21:04:32,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:32,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 773 transitions. [2023-01-27 21:04:32,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.25) internal successors, (773), 4 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,912 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 400.0) internal successors, (2000), 5 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,912 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 116 flow. Second operand 4 states and 773 transitions. [2023-01-27 21:04:32,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 472 flow [2023-01-27 21:04:32,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 93 transitions, 464 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-27 21:04:32,915 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 174 flow [2023-01-27 21:04:32,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-01-27 21:04:32,916 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-01-27 21:04:32,916 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 174 flow [2023-01-27 21:04:32,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:32,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:32,917 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] [2023-01-27 21:04:32,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 21:04:32,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:32,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:32,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1282271029, now seen corresponding path program 1 times [2023-01-27 21:04:32,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:32,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212399799] [2023-01-27 21:04:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:32,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212399799] [2023-01-27 21:04:33,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212399799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:04:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240300662] [2023-01-27 21:04:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:04:33,173 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) [2023-01-27 21:04:33,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:04:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:33,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 11 conjunts are in the unsatisfiable core [2023-01-27 21:04:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:04:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:04:33,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:04:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:04:33,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240300662] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:04:33,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:04:33,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-01-27 21:04:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997466287] [2023-01-27 21:04:33,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:04:33,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-27 21:04:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-27 21:04:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-27 21:04:33,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 400 [2023-01-27 21:04:33,656 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:33,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:33,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 400 [2023-01-27 21:04:33,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:34,658 INFO L130 PetriNetUnfolder]: 6835/9086 cut-off events. [2023-01-27 21:04:34,658 INFO L131 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2023-01-27 21:04:34,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25294 conditions, 9086 events. 6835/9086 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39953 event pairs, 328 based on Foata normal form. 134/9220 useless extension candidates. Maximal degree in co-relation 24836. Up to 4607 conditions per place. [2023-01-27 21:04:34,704 INFO L137 encePairwiseOnDemand]: 392/400 looper letters, 126 selfloop transitions, 23 changer transitions 36/185 dead transitions. [2023-01-27 21:04:34,704 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 185 transitions, 997 flow [2023-01-27 21:04:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:04:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:04:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1886 transitions. [2023-01-27 21:04:34,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42863636363636365 [2023-01-27 21:04:34,709 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1886 transitions. [2023-01-27 21:04:34,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1886 transitions. [2023-01-27 21:04:34,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:34,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1886 transitions. [2023-01-27 21:04:34,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 171.45454545454547) internal successors, (1886), 11 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:34,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:34,723 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 400.0) internal successors, (4800), 12 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:34,723 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 174 flow. Second operand 11 states and 1886 transitions. [2023-01-27 21:04:34,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 185 transitions, 997 flow [2023-01-27 21:04:34,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 185 transitions, 969 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-27 21:04:34,740 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 352 flow [2023-01-27 21:04:34,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-01-27 21:04:34,741 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-01-27 21:04:34,741 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 352 flow [2023-01-27 21:04:34,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 164.11111111111111) internal successors, (1477), 9 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:34,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:34,742 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:04:34,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:04:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:34,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:34,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1124719134, now seen corresponding path program 1 times [2023-01-27 21:04:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96858501] [2023-01-27 21:04:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:35,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:35,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96858501] [2023-01-27 21:04:35,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96858501] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:04:35,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581505656] [2023-01-27 21:04:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:35,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:35,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:04:35,869 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) [2023-01-27 21:04:35,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:04:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 21:04:36,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:04:36,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-01-27 21:04:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:04:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:04:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581505656] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:04:36,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:04:36,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-01-27 21:04:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828269097] [2023-01-27 21:04:36,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:04:36,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:04:36,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:04:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:04:36,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-27 21:04:36,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 352 flow. Second operand has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:36,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:36,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-27 21:04:36,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:42,984 INFO L130 PetriNetUnfolder]: 36653/48434 cut-off events. [2023-01-27 21:04:42,984 INFO L131 PetriNetUnfolder]: For 54698/54698 co-relation queries the response was YES. [2023-01-27 21:04:43,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147025 conditions, 48434 events. 36653/48434 cut-off events. For 54698/54698 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 265481 event pairs, 1658 based on Foata normal form. 322/48756 useless extension candidates. Maximal degree in co-relation 112987. Up to 14938 conditions per place. [2023-01-27 21:04:43,417 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 438 selfloop transitions, 273 changer transitions 51/762 dead transitions. [2023-01-27 21:04:43,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 762 transitions, 5071 flow [2023-01-27 21:04:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-27 21:04:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-27 21:04:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5336 transitions. [2023-01-27 21:04:43,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811428571428571 [2023-01-27 21:04:43,434 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5336 transitions. [2023-01-27 21:04:43,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5336 transitions. [2023-01-27 21:04:43,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:43,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5336 transitions. [2023-01-27 21:04:43,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 152.45714285714286) internal successors, (5336), 35 states have internal predecessors, (5336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:43,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:43,478 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 400.0) internal successors, (14400), 36 states have internal predecessors, (14400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:43,478 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 352 flow. Second operand 35 states and 5336 transitions. [2023-01-27 21:04:43,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 762 transitions, 5071 flow [2023-01-27 21:04:43,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 762 transitions, 4739 flow, removed 165 selfloop flow, removed 2 redundant places. [2023-01-27 21:04:43,633 INFO L231 Difference]: Finished difference. Result has 113 places, 385 transitions, 3471 flow [2023-01-27 21:04:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3471, PETRI_PLACES=113, PETRI_TRANSITIONS=385} [2023-01-27 21:04:43,636 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 74 predicate places. [2023-01-27 21:04:43,636 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 385 transitions, 3471 flow [2023-01-27 21:04:43,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:43,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:43,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:04:43,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:04:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:43,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:43,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1911556981, now seen corresponding path program 1 times [2023-01-27 21:04:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:43,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054988430] [2023-01-27 21:04:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:43,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:44,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054988430] [2023-01-27 21:04:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054988430] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:04:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144574096] [2023-01-27 21:04:44,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:44,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:44,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:04:44,823 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) [2023-01-27 21:04:44,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:04:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 21:04:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:04:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:04:45,146 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 [2023-01-27 21:04:45,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:04:45,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-27 21:04:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:04:45,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:04:45,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-01-27 21:04:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:04:45,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144574096] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:04:45,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:04:45,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-01-27 21:04:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894466800] [2023-01-27 21:04:45,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:04:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:04:45,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:04:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:04:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=520, Unknown=8, NotChecked=0, Total=600 [2023-01-27 21:04:45,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-01-27 21:04:45,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 385 transitions, 3471 flow. Second operand has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:45,574 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:04:45,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-01-27 21:04:45,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:04:53,746 INFO L130 PetriNetUnfolder]: 41995/55463 cut-off events. [2023-01-27 21:04:53,746 INFO L131 PetriNetUnfolder]: For 248015/248015 co-relation queries the response was YES. [2023-01-27 21:04:53,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230637 conditions, 55463 events. 41995/55463 cut-off events. For 248015/248015 co-relation queries the response was YES. Maximal size of possible extension queue 1989. Compared 307169 event pairs, 7141 based on Foata normal form. 3/55466 useless extension candidates. Maximal degree in co-relation 203666. Up to 37297 conditions per place. [2023-01-27 21:04:54,215 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 521 selfloop transitions, 206 changer transitions 14/741 dead transitions. [2023-01-27 21:04:54,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 741 transitions, 7726 flow [2023-01-27 21:04:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:04:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:04:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2516 transitions. [2023-01-27 21:04:54,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37 [2023-01-27 21:04:54,223 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2516 transitions. [2023-01-27 21:04:54,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2516 transitions. [2023-01-27 21:04:54,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:04:54,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2516 transitions. [2023-01-27 21:04:54,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 148.0) internal successors, (2516), 17 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:54,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:54,350 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 400.0) internal successors, (7200), 18 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:54,350 INFO L175 Difference]: Start difference. First operand has 113 places, 385 transitions, 3471 flow. Second operand 17 states and 2516 transitions. [2023-01-27 21:04:54,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 741 transitions, 7726 flow [2023-01-27 21:04:58,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 741 transitions, 7376 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-01-27 21:04:58,580 INFO L231 Difference]: Finished difference. Result has 134 places, 544 transitions, 5484 flow [2023-01-27 21:04:58,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=3221, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5484, PETRI_PLACES=134, PETRI_TRANSITIONS=544} [2023-01-27 21:04:58,582 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 95 predicate places. [2023-01-27 21:04:58,582 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 544 transitions, 5484 flow [2023-01-27 21:04:58,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 135.2) internal successors, (3380), 25 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:04:58,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:04:58,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:04:58,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-27 21:04:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:58,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:04:58,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:04:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1439824054, now seen corresponding path program 1 times [2023-01-27 21:04:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:04:58,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315831845] [2023-01-27 21:04:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:58,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:04:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:04:59,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:04:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315831845] [2023-01-27 21:04:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315831845] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:04:59,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050535842] [2023-01-27 21:04:59,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:04:59,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:04:59,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:04:59,809 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) [2023-01-27 21:04:59,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:04:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:04:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-27 21:04:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:05:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:05:00,251 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 [2023-01-27 21:05:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:05:00,329 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 [2023-01-27 21:05:00,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:05:00,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-01-27 21:05:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:05:00,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:05:00,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-01-27 21:05:00,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 61 [2023-01-27 21:05:00,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-01-27 21:05:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:05:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050535842] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:05:01,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:05:01,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-01-27 21:05:01,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301658003] [2023-01-27 21:05:01,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:05:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:05:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:05:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:05:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=805, Unknown=3, NotChecked=0, Total=930 [2023-01-27 21:05:01,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-27 21:05:01,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 544 transitions, 5484 flow. Second operand has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:05:01,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:05:01,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-27 21:05:01,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:05:19,129 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] [2023-01-27 21:05:21,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:24,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:26,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:28,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:30,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:32,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:35,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:37,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:39,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:42,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:44,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:46,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:48,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:51,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:55,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:05:57,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:01,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:04,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:08,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:11,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:13,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:15,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-27 21:06:18,504 INFO L130 PetriNetUnfolder]: 62929/83114 cut-off events. [2023-01-27 21:06:18,504 INFO L131 PetriNetUnfolder]: For 434551/434551 co-relation queries the response was YES. [2023-01-27 21:06:18,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353387 conditions, 83114 events. 62929/83114 cut-off events. For 434551/434551 co-relation queries the response was YES. Maximal size of possible extension queue 3035. Compared 485038 event pairs, 5923 based on Foata normal form. 12/83126 useless extension candidates. Maximal degree in co-relation 353321. Up to 44572 conditions per place. [2023-01-27 21:06:19,207 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 1028 selfloop transitions, 762 changer transitions 44/1834 dead transitions. [2023-01-27 21:06:19,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 1834 transitions, 18865 flow [2023-01-27 21:06:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-27 21:06:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-27 21:06:19,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 8079 transitions. [2023-01-27 21:06:19,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3543421052631579 [2023-01-27 21:06:19,222 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 8079 transitions. [2023-01-27 21:06:19,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 8079 transitions. [2023-01-27 21:06:19,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:06:19,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 8079 transitions. [2023-01-27 21:06:19,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 141.73684210526315) internal successors, (8079), 57 states have internal predecessors, (8079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:06:19,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 400.0) internal successors, (23200), 58 states have internal predecessors, (23200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:06:19,265 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 400.0) internal successors, (23200), 58 states have internal predecessors, (23200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:06:19,265 INFO L175 Difference]: Start difference. First operand has 134 places, 544 transitions, 5484 flow. Second operand 57 states and 8079 transitions. [2023-01-27 21:06:19,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 1834 transitions, 18865 flow [2023-01-27 21:06:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 1834 transitions, 18389 flow, removed 172 selfloop flow, removed 6 redundant places. [2023-01-27 21:06:28,250 INFO L231 Difference]: Finished difference. Result has 208 places, 1234 transitions, 15412 flow [2023-01-27 21:06:28,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=5215, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=15412, PETRI_PLACES=208, PETRI_TRANSITIONS=1234} [2023-01-27 21:06:28,251 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 169 predicate places. [2023-01-27 21:06:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 1234 transitions, 15412 flow [2023-01-27 21:06:28,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.70967741935485) internal successors, (3990), 31 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:06:28,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:06:28,253 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:06:28,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:06:28,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:06:28,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:06:28,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:06:28,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1855680392, now seen corresponding path program 2 times [2023-01-27 21:06:28,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:06:28,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987328577] [2023-01-27 21:06:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:06:28,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:06:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:06:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:06:29,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:06:29,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987328577] [2023-01-27 21:06:29,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987328577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:06:29,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475025199] [2023-01-27 21:06:29,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:06:29,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:06:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:06:29,258 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) [2023-01-27 21:06:29,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:06:29,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:06:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:06:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-27 21:06:29,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:06:29,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:06:29,666 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 [2023-01-27 21:06:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:06:29,751 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 [2023-01-27 21:06:29,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:06:29,933 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 [2023-01-27 21:06:30,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-01-27 21:06:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:06:30,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:06:32,554 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-01-27 21:06:32,555 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 506 treesize of output 364 [2023-01-27 21:06:32,575 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 90 treesize of output 76 [2023-01-27 21:06:32,582 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 157 treesize of output 129 [2023-01-27 21:06:32,593 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 66 treesize of output 59 [2023-01-27 21:06:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:06:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475025199] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:06:32,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:06:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 29 [2023-01-27 21:06:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447724635] [2023-01-27 21:06:32,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:06:32,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-27 21:06:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:06:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-27 21:06:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=765, Unknown=6, NotChecked=0, Total=930 [2023-01-27 21:06:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 400 [2023-01-27 21:06:32,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 1234 transitions, 15412 flow. Second operand has 31 states, 31 states have (on average 128.67741935483872) internal successors, (3989), 31 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:06:32,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:06:32,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 400 [2023-01-27 21:06:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:06:35,779 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] [2023-01-27 21:07:12,812 INFO L130 PetriNetUnfolder]: 83442/110132 cut-off events. [2023-01-27 21:07:12,812 INFO L131 PetriNetUnfolder]: For 735002/735002 co-relation queries the response was YES. [2023-01-27 21:07:13,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535072 conditions, 110132 events. 83442/110132 cut-off events. For 735002/735002 co-relation queries the response was YES. Maximal size of possible extension queue 4147. Compared 663618 event pairs, 6872 based on Foata normal form. 11/110143 useless extension candidates. Maximal degree in co-relation 534983. Up to 72973 conditions per place. [2023-01-27 21:07:14,030 INFO L137 encePairwiseOnDemand]: 385/400 looper letters, 1042 selfloop transitions, 1584 changer transitions 10/2636 dead transitions. [2023-01-27 21:07:14,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 2636 transitions, 35124 flow [2023-01-27 21:07:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-27 21:07:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-27 21:07:14,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5617 transitions. [2023-01-27 21:07:14,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3510625 [2023-01-27 21:07:14,036 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5617 transitions. [2023-01-27 21:07:14,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5617 transitions. [2023-01-27 21:07:14,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:07:14,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5617 transitions. [2023-01-27 21:07:14,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 140.425) internal successors, (5617), 40 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:07:14,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:07:14,058 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 400.0) internal successors, (16400), 41 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:07:14,059 INFO L175 Difference]: Start difference. First operand has 208 places, 1234 transitions, 15412 flow. Second operand 40 states and 5617 transitions. [2023-01-27 21:07:14,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 2636 transitions, 35124 flow [2023-01-27 21:07:48,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 2636 transitions, 31275 flow, removed 1844 selfloop flow, removed 10 redundant places. [2023-01-27 21:07:48,418 INFO L231 Difference]: Finished difference. Result has 262 places, 2250 transitions, 30323 flow [2023-01-27 21:07:48,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=13069, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=739, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30323, PETRI_PLACES=262, PETRI_TRANSITIONS=2250} [2023-01-27 21:07:48,420 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 223 predicate places. [2023-01-27 21:07:48,420 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 2250 transitions, 30323 flow [2023-01-27 21:07:48,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 128.67741935483872) internal successors, (3989), 31 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:07:48,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:07:48,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:07:48,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:07:48,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:07:48,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:07:48,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:07:48,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1615068153, now seen corresponding path program 1 times [2023-01-27 21:07:48,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:07:48,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343370124] [2023-01-27 21:07:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:07:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:07:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:07:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:07:49,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:07:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343370124] [2023-01-27 21:07:49,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343370124] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:07:49,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392408024] [2023-01-27 21:07:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:07:49,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:07:49,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:07:49,591 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) [2023-01-27 21:07:49,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:07:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:07:49,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-27 21:07:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:07:49,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:07:49,976 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 [2023-01-27 21:07:50,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:07:50,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-27 21:07:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:07:50,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:07:50,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2023-01-27 21:07:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:07:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392408024] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:07:50,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:07:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2023-01-27 21:07:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721815389] [2023-01-27 21:07:50,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:07:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-27 21:07:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:07:50,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-27 21:07:50,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=517, Unknown=9, NotChecked=0, Total=600 [2023-01-27 21:07:50,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 400 [2023-01-27 21:07:50,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 2250 transitions, 30323 flow. Second operand has 25 states, 25 states have (on average 134.96) internal successors, (3374), 25 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:07:50,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:07:50,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 400 [2023-01-27 21:07:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:08:23,963 INFO L130 PetriNetUnfolder]: 89460/118096 cut-off events. [2023-01-27 21:08:23,963 INFO L131 PetriNetUnfolder]: For 774327/774327 co-relation queries the response was YES. [2023-01-27 21:08:25,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621169 conditions, 118096 events. 89460/118096 cut-off events. For 774327/774327 co-relation queries the response was YES. Maximal size of possible extension queue 4469. Compared 714950 event pairs, 16125 based on Foata normal form. 3/118099 useless extension candidates. Maximal degree in co-relation 621058. Up to 108710 conditions per place. [2023-01-27 21:08:26,021 INFO L137 encePairwiseOnDemand]: 387/400 looper letters, 2175 selfloop transitions, 451 changer transitions 20/2646 dead transitions. [2023-01-27 21:08:26,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 2646 transitions, 39211 flow [2023-01-27 21:08:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:08:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:08:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3067 transitions. [2023-01-27 21:08:26,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651190476190476 [2023-01-27 21:08:26,025 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3067 transitions. [2023-01-27 21:08:26,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3067 transitions. [2023-01-27 21:08:26,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:08:26,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3067 transitions. [2023-01-27 21:08:26,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 146.04761904761904) internal successors, (3067), 21 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:08:26,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:08:26,036 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:08:26,036 INFO L175 Difference]: Start difference. First operand has 262 places, 2250 transitions, 30323 flow. Second operand 21 states and 3067 transitions. [2023-01-27 21:08:26,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 2646 transitions, 39211 flow [2023-01-27 21:09:15,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 2646 transitions, 37538 flow, removed 826 selfloop flow, removed 4 redundant places. [2023-01-27 21:09:15,152 INFO L231 Difference]: Finished difference. Result has 288 places, 2446 transitions, 32792 flow [2023-01-27 21:09:15,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=28669, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=32792, PETRI_PLACES=288, PETRI_TRANSITIONS=2446} [2023-01-27 21:09:15,154 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 249 predicate places. [2023-01-27 21:09:15,154 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 2446 transitions, 32792 flow [2023-01-27 21:09:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 134.96) internal successors, (3374), 25 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:09:15,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:09:15,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:09:15,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 21:09:15,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:09:15,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:09:15,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:09:15,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2074877216, now seen corresponding path program 2 times [2023-01-27 21:09:15,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:09:15,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082544967] [2023-01-27 21:09:15,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:09:15,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:09:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:09:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:09:16,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:09:16,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082544967] [2023-01-27 21:09:16,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082544967] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:09:16,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890618506] [2023-01-27 21:09:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:09:16,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:09:16,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:09:16,081 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) [2023-01-27 21:09:16,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:09:16,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:09:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:09:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-27 21:09:16,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:09:16,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-27 21:09:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:09:16,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:09:17,150 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-01-27 21:09:17,150 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 24 treesize of output 12 [2023-01-27 21:09:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:09:17,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890618506] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:09:17,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:09:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 22 [2023-01-27 21:09:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899924097] [2023-01-27 21:09:17,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:09:17,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-27 21:09:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:09:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-27 21:09:17,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2023-01-27 21:09:17,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 400 [2023-01-27 21:09:17,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 2446 transitions, 32792 flow. Second operand has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:09:17,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:09:17,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 400 [2023-01-27 21:09:17,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:10:04,355 INFO L130 PetriNetUnfolder]: 111419/147044 cut-off events. [2023-01-27 21:10:04,355 INFO L131 PetriNetUnfolder]: For 1025800/1025800 co-relation queries the response was YES. [2023-01-27 21:10:06,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789651 conditions, 147044 events. 111419/147044 cut-off events. For 1025800/1025800 co-relation queries the response was YES. Maximal size of possible extension queue 5505. Compared 914776 event pairs, 18188 based on Foata normal form. 27/147071 useless extension candidates. Maximal degree in co-relation 789530. Up to 85290 conditions per place. [2023-01-27 21:10:07,138 INFO L137 encePairwiseOnDemand]: 386/400 looper letters, 2703 selfloop transitions, 1023 changer transitions 22/3748 dead transitions. [2023-01-27 21:10:07,139 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 3748 transitions, 53401 flow [2023-01-27 21:10:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-27 21:10:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-27 21:10:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8399 transitions. [2023-01-27 21:10:07,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38177272727272726 [2023-01-27 21:10:07,149 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8399 transitions. [2023-01-27 21:10:07,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8399 transitions. [2023-01-27 21:10:07,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:10:07,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8399 transitions. [2023-01-27 21:10:07,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 152.70909090909092) internal successors, (8399), 55 states have internal predecessors, (8399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:10:07,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 400.0) internal successors, (22400), 56 states have internal predecessors, (22400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:10:07,180 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 400.0) internal successors, (22400), 56 states have internal predecessors, (22400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:10:07,180 INFO L175 Difference]: Start difference. First operand has 288 places, 2446 transitions, 32792 flow. Second operand 55 states and 8399 transitions. [2023-01-27 21:10:07,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 3748 transitions, 53401 flow [2023-01-27 21:11:09,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3748 transitions, 52495 flow, removed 431 selfloop flow, removed 5 redundant places. [2023-01-27 21:11:09,941 INFO L231 Difference]: Finished difference. Result has 375 places, 3163 transitions, 46496 flow [2023-01-27 21:11:09,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=32151, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1865, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=46496, PETRI_PLACES=375, PETRI_TRANSITIONS=3163} [2023-01-27 21:11:09,944 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 336 predicate places. [2023-01-27 21:11:09,944 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 3163 transitions, 46496 flow [2023-01-27 21:11:09,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.6086956521739) internal successors, (3211), 23 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:11:09,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:11:09,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:11:09,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:11:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:11:10,151 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 21:11:10,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:11:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1952509179, now seen corresponding path program 2 times [2023-01-27 21:11:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:11:10,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087457900] [2023-01-27 21:11:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:11:10,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:11:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:11:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:11:10,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:11:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087457900] [2023-01-27 21:11:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087457900] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:11:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050444094] [2023-01-27 21:11:10,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:11:10,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:11:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:11:10,729 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) [2023-01-27 21:11:10,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:11:10,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:11:10,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:11:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-27 21:11:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:11:11,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:11:11,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-01-27 21:11:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:11:11,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:11:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:11:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050444094] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:11:11,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:11:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 17 [2023-01-27 21:11:11,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731158126] [2023-01-27 21:11:11,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:11:11,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-27 21:11:11,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:11:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-27 21:11:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-27 21:11:11,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 400 [2023-01-27 21:11:11,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 3163 transitions, 46496 flow. Second operand has 18 states, 18 states have (on average 144.05555555555554) internal successors, (2593), 18 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 21:11:11,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:11:11,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 400 [2023-01-27 21:11:11,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand