/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 20:52:50,188 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 20:52:50,221 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 20:52:50,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 20:52:50,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 20:52:50,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 20:52:50,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 20:52:50,238 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 20:52:50,239 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 20:52:50,239 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 20:52:50,239 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 20:52:50,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 20:52:50,240 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 20:52:50,240 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 20:52:50,241 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 20:52:50,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 20:52:50,241 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 20:52:50,241 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 20:52:50,242 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 20:52:50,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 20:52:50,242 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 20:52:50,242 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 20:52:50,242 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 20:52:50,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 20:52:50,243 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 20:52:50,243 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 20:52:50,243 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 20:52:50,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 20:52:50,244 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 20:52:50,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 20:52:50,244 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:52:50,244 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 20:52:50,244 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 20:52:50,245 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 20:52:50,246 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 20:52:50,246 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 20:52:50,246 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 20:52:50,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 20:52:50,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 20:52:50,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 20:52:50,396 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 20:52:50,397 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 20:52:50,397 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-03 20:52:51,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 20:52:51,507 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 20:52:51,508 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-03 20:52:51,514 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49c95518/a92498132d574f67b7f53c2e6a4c5905/FLAG96841c8cd [2023-08-03 20:52:51,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c49c95518/a92498132d574f67b7f53c2e6a4c5905 [2023-08-03 20:52:51,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 20:52:51,534 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 20:52:51,535 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 20:52:51,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 20:52:51,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 20:52:51,538 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50555f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51, skipping insertion in model container [2023-08-03 20:52:51,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,557 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 20:52:51,696 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-03 20:52:51,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:52:51,713 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 20:52:51,739 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-03 20:52:51,745 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 20:52:51,750 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:52:51,750 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 20:52:51,754 INFO L206 MainTranslator]: Completed translation [2023-08-03 20:52:51,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51 WrapperNode [2023-08-03 20:52:51,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 20:52:51,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 20:52:51,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 20:52:51,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 20:52:51,761 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,774 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,796 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 179 [2023-08-03 20:52:51,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 20:52:51,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 20:52:51,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 20:52:51,797 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 20:52:51,803 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,803 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,823 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,824 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,825 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 20:52:51,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 20:52:51,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 20:52:51,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 20:52:51,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (1/1) ... [2023-08-03 20:52:51,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 20:52:51,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:52:51,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 20:52:51,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 20:52:51,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 20:52:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 20:52:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 20:52:51,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 20:52:51,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 20:52:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 20:52:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 20:52:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 20:52:51,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 20:52:51,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 20:52:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 20:52:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 20:52:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 20:52:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 20:52:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 20:52:51,917 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 20:52:52,011 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 20:52:52,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 20:52:52,249 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 20:52:52,302 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 20:52:52,302 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-03 20:52:52,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:52:52 BoogieIcfgContainer [2023-08-03 20:52:52,304 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 20:52:52,306 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 20:52:52,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 20:52:52,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 20:52:52,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 08:52:51" (1/3) ... [2023-08-03 20:52:52,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b73a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:52:52, skipping insertion in model container [2023-08-03 20:52:52,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 08:52:51" (2/3) ... [2023-08-03 20:52:52,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79b73a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 08:52:52, skipping insertion in model container [2023-08-03 20:52:52,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 08:52:52" (3/3) ... [2023-08-03 20:52:52,309 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-03 20:52:52,314 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 20:52:52,321 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 20:52:52,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 20:52:52,321 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 20:52:52,361 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 20:52:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,459 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-03 20:52:52,459 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:52:52,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 20:52:52,467 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,477 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:52:52,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,491 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-03 20:52:52,527 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-03 20:52:52,527 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 20:52:52,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-03 20:52:52,531 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-03 20:52:55,680 INFO L134 LiptonReduction]: Checked pairs total: 4122 [2023-08-03 20:52:55,680 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-03 20:52:55,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:52:55,693 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@443e7114, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:52:55,693 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:52:55,696 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:52:55,696 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-03 20:52:55,696 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:52:55,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:52:55,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:52:55,696 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:52:55,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:52:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1152666352, now seen corresponding path program 1 times [2023-08-03 20:52:55,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:52:55,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927031142] [2023-08-03 20:52:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:52:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:52:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:52:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:52:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:52:55,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927031142] [2023-08-03 20:52:55,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927031142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:52:55,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:52:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:52:55,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587973581] [2023-08-03 20:52:55,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:52:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:52:55,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:52:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:52:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:52:55,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 311 [2023-08-03 20:52:55,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:55,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:52:55,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 311 [2023-08-03 20:52:55,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:52:55,925 INFO L124 PetriNetUnfolderBase]: 164/284 cut-off events. [2023-08-03 20:52:55,926 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-03 20:52:55,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 284 events. 164/284 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 950 event pairs, 40 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 418. Up to 261 conditions per place. [2023-08-03 20:52:55,928 INFO L140 encePairwiseOnDemand]: 307/311 looper letters, 26 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2023-08-03 20:52:55,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 144 flow [2023-08-03 20:52:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:52:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:52:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-03 20:52:55,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565916398713826 [2023-08-03 20:52:55,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-03 20:52:55,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-03 20:52:55,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:52:55,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-03 20:52:55,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:55,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:55,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 311.0) internal successors, (1244), 4 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:55,948 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 3 states and 426 transitions. [2023-08-03 20:52:55,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 144 flow [2023-08-03 20:52:55,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:52:55,951 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 90 flow [2023-08-03 20:52:55,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=311, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2023-08-03 20:52:55,954 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 20:52:55,954 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 90 flow [2023-08-03 20:52:55,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:55,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:52:55,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-03 20:52:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 20:52:55,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:52:55,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:52:55,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1324191346, now seen corresponding path program 1 times [2023-08-03 20:52:55,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:52:55,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501192583] [2023-08-03 20:52:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:52:55,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:52:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:52:55,974 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 20:52:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 20:52:55,997 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 20:52:55,998 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 20:52:55,999 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 20:52:56,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 20:52:56,000 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 20:52:56,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 20:52:56,000 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 20:52:56,002 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 20:52:56,002 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 20:52:56,019 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 20:52:56,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,165 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-03 20:52:56,165 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:52:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-03 20:52:56,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 20:52:56,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-03 20:52:56,228 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-03 20:52:56,228 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 20:52:56,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-03 20:52:56,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 9396 [2023-08-03 20:52:59,442 INFO L134 LiptonReduction]: Checked pairs total: 13330 [2023-08-03 20:52:59,442 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-03 20:52:59,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 20:52:59,444 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@443e7114, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 20:52:59,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 20:52:59,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 20:52:59,460 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-03 20:52:59,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 20:52:59,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:52:59,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 20:52:59,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:52:59,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:52:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2025085348, now seen corresponding path program 1 times [2023-08-03 20:52:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:52:59,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550103651] [2023-08-03 20:52:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:52:59,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:52:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:52:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:52:59,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:52:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550103651] [2023-08-03 20:52:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550103651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:52:59,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:52:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:52:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932581779] [2023-08-03 20:52:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:52:59,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:52:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:52:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:52:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:52:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 372 [2023-08-03 20:52:59,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:52:59,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:52:59,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 372 [2023-08-03 20:52:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:00,099 INFO L124 PetriNetUnfolderBase]: 6283/8385 cut-off events. [2023-08-03 20:53:00,100 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2023-08-03 20:53:00,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 8385 events. 6283/8385 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36911 event pairs, 2637 based on Foata normal form. 0/5162 useless extension candidates. Maximal degree in co-relation 6497. Up to 8089 conditions per place. [2023-08-03 20:53:00,133 INFO L140 encePairwiseOnDemand]: 367/372 looper letters, 39 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 20:53:00,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 228 flow [2023-08-03 20:53:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:53:00,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:53:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-03 20:53:00,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45878136200716846 [2023-08-03 20:53:00,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-03 20:53:00,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-03 20:53:00,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:00,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-03 20:53:00,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,143 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 142 flow. Second operand 3 states and 512 transitions. [2023-08-03 20:53:00,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 228 flow [2023-08-03 20:53:00,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:53:00,147 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 150 flow [2023-08-03 20:53:00,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-08-03 20:53:00,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-03 20:53:00,148 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 150 flow [2023-08-03 20:53:00,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:00,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 20:53:00,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:00,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:00,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2023045528, now seen corresponding path program 1 times [2023-08-03 20:53:00,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:00,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418253078] [2023-08-03 20:53:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:00,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:53:00,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:00,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418253078] [2023-08-03 20:53:00,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418253078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:00,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:53:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:53:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728761291] [2023-08-03 20:53:00,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:53:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:00,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:53:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 20:53:00,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 372 [2023-08-03 20:53:00,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:00,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 372 [2023-08-03 20:53:00,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:00,702 INFO L124 PetriNetUnfolderBase]: 6311/8463 cut-off events. [2023-08-03 20:53:00,703 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2023-08-03 20:53:00,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17225 conditions, 8463 events. 6311/8463 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37887 event pairs, 2544 based on Foata normal form. 0/5221 useless extension candidates. Maximal degree in co-relation 17191. Up to 8042 conditions per place. [2023-08-03 20:53:00,740 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 20:53:00,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 262 flow [2023-08-03 20:53:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:53:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:53:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-03 20:53:00,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614695340501792 [2023-08-03 20:53:00,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-03 20:53:00,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-03 20:53:00,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:00,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-03 20:53:00,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,788 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 150 flow. Second operand 3 states and 515 transitions. [2023-08-03 20:53:00,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 262 flow [2023-08-03 20:53:00,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:53:00,790 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 160 flow [2023-08-03 20:53:00,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-03 20:53:00,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-03 20:53:00,791 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 160 flow [2023-08-03 20:53:00,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:00,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:00,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 20:53:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 20:53:00,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:00,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash -936998760, now seen corresponding path program 1 times [2023-08-03 20:53:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921775227] [2023-08-03 20:53:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:00,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:53:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921775227] [2023-08-03 20:53:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921775227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610295644] [2023-08-03 20:53:00,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:00,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:00,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:00,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:00,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 20:53:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:00,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:53:00,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 20:53:01,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610295644] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:53:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240627940] [2023-08-03 20:53:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:53:01,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:01,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:01,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:01,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:01,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:01,587 INFO L124 PetriNetUnfolderBase]: 6269/8436 cut-off events. [2023-08-03 20:53:01,587 INFO L125 PetriNetUnfolderBase]: For 1118/1118 co-relation queries the response was YES. [2023-08-03 20:53:01,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17387 conditions, 8436 events. 6269/8436 cut-off events. For 1118/1118 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38056 event pairs, 2061 based on Foata normal form. 4/5345 useless extension candidates. Maximal degree in co-relation 6591. Up to 8050 conditions per place. [2023-08-03 20:53:01,632 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 43 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2023-08-03 20:53:01,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 269 flow [2023-08-03 20:53:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:53:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:53:01,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 822 transitions. [2023-08-03 20:53:01,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2023-08-03 20:53:01,634 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 822 transitions. [2023-08-03 20:53:01,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 822 transitions. [2023-08-03 20:53:01,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:01,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 822 transitions. [2023-08-03 20:53:01,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:01,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:01,639 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:01,639 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 160 flow. Second operand 5 states and 822 transitions. [2023-08-03 20:53:01,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 269 flow [2023-08-03 20:53:01,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 260 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:53:01,643 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 169 flow [2023-08-03 20:53:01,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-03 20:53:01,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-08-03 20:53:01,645 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 169 flow [2023-08-03 20:53:01,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:01,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:01,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:01,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:01,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:01,867 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:01,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:01,868 INFO L85 PathProgramCache]: Analyzing trace with hash 954205815, now seen corresponding path program 1 times [2023-08-03 20:53:01,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:01,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85005278] [2023-08-03 20:53:01,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:01,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 20:53:01,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85005278] [2023-08-03 20:53:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85005278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741770237] [2023-08-03 20:53:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:01,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:01,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:01,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:01,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 20:53:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:02,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:53:02,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 20:53:02,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741770237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:02,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:02,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-03 20:53:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302580801] [2023-08-03 20:53:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:02,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:53:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:53:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:02,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 372 [2023-08-03 20:53:02,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:02,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 372 [2023-08-03 20:53:02,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:02,446 INFO L124 PetriNetUnfolderBase]: 5456/7499 cut-off events. [2023-08-03 20:53:02,447 INFO L125 PetriNetUnfolderBase]: For 606/606 co-relation queries the response was YES. [2023-08-03 20:53:02,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15350 conditions, 7499 events. 5456/7499 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 35216 event pairs, 2093 based on Foata normal form. 0/4865 useless extension candidates. Maximal degree in co-relation 6852. Up to 5366 conditions per place. [2023-08-03 20:53:02,474 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 20:53:02,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 63 transitions, 323 flow [2023-08-03 20:53:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:53:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:53:02,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-03 20:53:02,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2023-08-03 20:53:02,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-03 20:53:02,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-03 20:53:02,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:02,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-03 20:53:02,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,479 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 169 flow. Second operand 3 states and 522 transitions. [2023-08-03 20:53:02,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 63 transitions, 323 flow [2023-08-03 20:53:02,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 316 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:53:02,481 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 174 flow [2023-08-03 20:53:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2023-08-03 20:53:02,481 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2023-08-03 20:53:02,482 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 174 flow [2023-08-03 20:53:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:02,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:02,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 20:53:02,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 20:53:02,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:02,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash -597354250, now seen corresponding path program 1 times [2023-08-03 20:53:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:02,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942307846] [2023-08-03 20:53:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:02,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942307846] [2023-08-03 20:53:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942307846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443483718] [2023-08-03 20:53:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:02,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:02,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:02,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:02,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 20:53:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:02,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:53:02,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:02,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443483718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:02,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:02,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:53:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188759358] [2023-08-03 20:53:02,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:02,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:02,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:02,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:02,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:02,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:02,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:02,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:02,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:02,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:03,202 INFO L124 PetriNetUnfolderBase]: 4769/6470 cut-off events. [2023-08-03 20:53:03,202 INFO L125 PetriNetUnfolderBase]: For 1145/1145 co-relation queries the response was YES. [2023-08-03 20:53:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13784 conditions, 6470 events. 4769/6470 cut-off events. For 1145/1145 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28452 event pairs, 1628 based on Foata normal form. 2/4289 useless extension candidates. Maximal degree in co-relation 5603. Up to 6203 conditions per place. [2023-08-03 20:53:03,226 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 44 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 20:53:03,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 54 transitions, 276 flow [2023-08-03 20:53:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 666 transitions. [2023-08-03 20:53:03,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475806451612903 [2023-08-03 20:53:03,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 666 transitions. [2023-08-03 20:53:03,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 666 transitions. [2023-08-03 20:53:03,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:03,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 666 transitions. [2023-08-03 20:53:03,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.5) internal successors, (666), 4 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:03,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:03,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:03,231 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 174 flow. Second operand 4 states and 666 transitions. [2023-08-03 20:53:03,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 54 transitions, 276 flow [2023-08-03 20:53:03,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:53:03,235 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 170 flow [2023-08-03 20:53:03,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-03 20:53:03,235 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-08-03 20:53:03,235 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 170 flow [2023-08-03 20:53:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:03,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:03,236 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:03,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:03,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:03,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:03,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1438876425, now seen corresponding path program 1 times [2023-08-03 20:53:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317190714] [2023-08-03 20:53:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:53:03,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:03,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317190714] [2023-08-03 20:53:03,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317190714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:03,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511999031] [2023-08-03 20:53:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:03,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:03,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:03,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:03,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 20:53:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:03,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 20:53:03,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 20:53:03,625 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:03,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511999031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:03,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:03,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 20:53:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949441528] [2023-08-03 20:53:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:03,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 20:53:03,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:03,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:03,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:03,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:03,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:04,001 INFO L124 PetriNetUnfolderBase]: 4505/6158 cut-off events. [2023-08-03 20:53:04,001 INFO L125 PetriNetUnfolderBase]: For 726/726 co-relation queries the response was YES. [2023-08-03 20:53:04,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13011 conditions, 6158 events. 4505/6158 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27890 event pairs, 270 based on Foata normal form. 64/4151 useless extension candidates. Maximal degree in co-relation 7770. Up to 5424 conditions per place. [2023-08-03 20:53:04,023 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 59 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-03 20:53:04,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 340 flow [2023-08-03 20:53:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 20:53:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 20:53:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2023-08-03 20:53:04,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-08-03 20:53:04,031 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2023-08-03 20:53:04,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2023-08-03 20:53:04,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:04,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2023-08-03 20:53:04,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,040 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 170 flow. Second operand 5 states and 837 transitions. [2023-08-03 20:53:04,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 340 flow [2023-08-03 20:53:04,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 328 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 20:53:04,045 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 175 flow [2023-08-03 20:53:04,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=175, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2023-08-03 20:53:04,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2023-08-03 20:53:04,046 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 175 flow [2023-08-03 20:53:04,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:04,046 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:04,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 20:53:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:04,251 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:04,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1762938826, now seen corresponding path program 1 times [2023-08-03 20:53:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:04,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121345322] [2023-08-03 20:53:04,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:04,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 20:53:04,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:04,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121345322] [2023-08-03 20:53:04,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121345322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:04,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341351676] [2023-08-03 20:53:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:04,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:04,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:04,305 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:04,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 20:53:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:04,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 20:53:04,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:04,411 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:04,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341351676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:04,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 20:53:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75013770] [2023-08-03 20:53:04,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:53:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:53:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:04,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 372 [2023-08-03 20:53:04,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:04,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 372 [2023-08-03 20:53:04,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:04,821 INFO L124 PetriNetUnfolderBase]: 4410/6131 cut-off events. [2023-08-03 20:53:04,821 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-03 20:53:04,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13080 conditions, 6131 events. 4410/6131 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28297 event pairs, 1794 based on Foata normal form. 0/4194 useless extension candidates. Maximal degree in co-relation 7961. Up to 4326 conditions per place. [2023-08-03 20:53:04,842 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 55 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 20:53:04,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 329 flow [2023-08-03 20:53:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:53:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:53:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-03 20:53:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2023-08-03 20:53:04,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-03 20:53:04,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-03 20:53:04,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:04,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-03 20:53:04,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,846 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 175 flow. Second operand 3 states and 522 transitions. [2023-08-03 20:53:04,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 329 flow [2023-08-03 20:53:04,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 322 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 20:53:04,848 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 180 flow [2023-08-03 20:53:04,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-03 20:53:04,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-03 20:53:04,849 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 180 flow [2023-08-03 20:53:04,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:04,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:04,849 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:04,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 20:53:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:05,054 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:05,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2015894773, now seen corresponding path program 1 times [2023-08-03 20:53:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868590845] [2023-08-03 20:53:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:05,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:05,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868590845] [2023-08-03 20:53:05,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868590845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:05,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976823894] [2023-08-03 20:53:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:05,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:05,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:05,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 20:53:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:05,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:53:05,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:05,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 20:53:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976823894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:05,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:05,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:53:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085985954] [2023-08-03 20:53:05,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:05,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:05,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:05,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:05,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:05,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:05,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:05,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:05,588 INFO L124 PetriNetUnfolderBase]: 4266/5931 cut-off events. [2023-08-03 20:53:05,588 INFO L125 PetriNetUnfolderBase]: For 1032/1032 co-relation queries the response was YES. [2023-08-03 20:53:05,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12918 conditions, 5931 events. 4266/5931 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 27068 event pairs, 1005 based on Foata normal form. 16/4127 useless extension candidates. Maximal degree in co-relation 7987. Up to 5218 conditions per place. [2023-08-03 20:53:05,602 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 56 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-03 20:53:05,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 328 flow [2023-08-03 20:53:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 677 transitions. [2023-08-03 20:53:05,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549731182795699 [2023-08-03 20:53:05,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 677 transitions. [2023-08-03 20:53:05,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 677 transitions. [2023-08-03 20:53:05,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:05,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 677 transitions. [2023-08-03 20:53:05,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,609 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,609 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 180 flow. Second operand 4 states and 677 transitions. [2023-08-03 20:53:05,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 328 flow [2023-08-03 20:53:05,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:53:05,622 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 176 flow [2023-08-03 20:53:05,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-03 20:53:05,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-03 20:53:05,624 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 176 flow [2023-08-03 20:53:05,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:05,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:05,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 20:53:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:05,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:05,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 169885753, now seen corresponding path program 1 times [2023-08-03 20:53:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:05,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149326805] [2023-08-03 20:53:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:53:05,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:05,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149326805] [2023-08-03 20:53:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149326805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:05,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371302067] [2023-08-03 20:53:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:05,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:05,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:05,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 20:53:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:05,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:53:05,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:53:05,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 20:53:05,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371302067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:05,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:05,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 20:53:05,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70100856] [2023-08-03 20:53:05,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:05,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:05,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:05,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:05,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:05,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:05,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:05,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:06,238 INFO L124 PetriNetUnfolderBase]: 3004/4197 cut-off events. [2023-08-03 20:53:06,238 INFO L125 PetriNetUnfolderBase]: For 1059/1059 co-relation queries the response was YES. [2023-08-03 20:53:06,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9119 conditions, 4197 events. 3004/4197 cut-off events. For 1059/1059 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17582 event pairs, 583 based on Foata normal form. 96/2991 useless extension candidates. Maximal degree in co-relation 7837. Up to 1527 conditions per place. [2023-08-03 20:53:06,250 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 63 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-03 20:53:06,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 370 flow [2023-08-03 20:53:06,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:06,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-03 20:53:06,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603494623655914 [2023-08-03 20:53:06,252 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:06,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,255 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,255 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 176 flow. Second operand 4 states and 685 transitions. [2023-08-03 20:53:06,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 370 flow [2023-08-03 20:53:06,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 364 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 20:53:06,259 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 190 flow [2023-08-03 20:53:06,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-03 20:53:06,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2023-08-03 20:53:06,259 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 190 flow [2023-08-03 20:53:06,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:06,260 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:06,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 20:53:06,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:06,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:06,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 726729365, now seen corresponding path program 1 times [2023-08-03 20:53:06,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:06,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684743335] [2023-08-03 20:53:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684743335] [2023-08-03 20:53:06,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684743335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935705097] [2023-08-03 20:53:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:06,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:06,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:06,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:06,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 20:53:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:06,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 20:53:06,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:06,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:06,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935705097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:06,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:06,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 20:53:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525538771] [2023-08-03 20:53:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:06,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 20:53:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 20:53:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:06,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-03 20:53:06,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:06,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-03 20:53:06,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:06,924 INFO L124 PetriNetUnfolderBase]: 2990/4172 cut-off events. [2023-08-03 20:53:06,924 INFO L125 PetriNetUnfolderBase]: For 1888/1888 co-relation queries the response was YES. [2023-08-03 20:53:06,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9703 conditions, 4172 events. 2990/4172 cut-off events. For 1888/1888 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17413 event pairs, 1487 based on Foata normal form. 13/2889 useless extension candidates. Maximal degree in co-relation 8417. Up to 3444 conditions per place. [2023-08-03 20:53:06,938 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 63 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-03 20:53:06,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 386 flow [2023-08-03 20:53:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-03 20:53:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603494623655914 [2023-08-03 20:53:06,940 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:06,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-03 20:53:06,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,943 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 190 flow. Second operand 4 states and 685 transitions. [2023-08-03 20:53:06,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 386 flow [2023-08-03 20:53:06,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 20:53:06,949 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 194 flow [2023-08-03 20:53:06,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2023-08-03 20:53:06,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-08-03 20:53:06,950 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 194 flow [2023-08-03 20:53:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:06,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:06,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:06,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:07,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-03 20:53:07,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:07,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:07,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1741458513, now seen corresponding path program 1 times [2023-08-03 20:53:07,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:07,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604927434] [2023-08-03 20:53:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:07,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604927434] [2023-08-03 20:53:07,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604927434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:07,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182911838] [2023-08-03 20:53:07,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:07,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:07,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:07,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:07,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 20:53:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:07,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-03 20:53:07,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 20:53:07,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:07,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182911838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 3 [2023-08-03 20:53:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588099837] [2023-08-03 20:53:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 20:53:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 20:53:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 20:53:07,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 372 [2023-08-03 20:53:07,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:07,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:07,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 372 [2023-08-03 20:53:07,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:08,082 INFO L124 PetriNetUnfolderBase]: 5536/7625 cut-off events. [2023-08-03 20:53:08,082 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2023-08-03 20:53:08,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17653 conditions, 7625 events. 5536/7625 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 35103 event pairs, 2666 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 17321. Up to 4190 conditions per place. [2023-08-03 20:53:08,101 INFO L140 encePairwiseOnDemand]: 368/372 looper letters, 73 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-03 20:53:08,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 511 flow [2023-08-03 20:53:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 20:53:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 20:53:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-03 20:53:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49014336917562723 [2023-08-03 20:53:08,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-03 20:53:08,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-03 20:53:08,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:08,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-03 20:53:08,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:08,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:08,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:08,105 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 194 flow. Second operand 3 states and 547 transitions. [2023-08-03 20:53:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 511 flow [2023-08-03 20:53:08,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 495 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 20:53:08,123 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 205 flow [2023-08-03 20:53:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-08-03 20:53:08,124 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-08-03 20:53:08,124 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 205 flow [2023-08-03 20:53:08,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:08,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:08,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-03 20:53:08,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-03 20:53:08,329 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:08,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:08,329 INFO L85 PathProgramCache]: Analyzing trace with hash 975165366, now seen corresponding path program 1 times [2023-08-03 20:53:08,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:08,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209958852] [2023-08-03 20:53:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 20:53:08,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:08,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209958852] [2023-08-03 20:53:08,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209958852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:08,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 20:53:08,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 20:53:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28034904] [2023-08-03 20:53:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:08,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:53:08,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:08,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:53:08,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 20:53:08,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 372 [2023-08-03 20:53:08,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 205 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:08,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:08,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 372 [2023-08-03 20:53:08,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:09,331 INFO L124 PetriNetUnfolderBase]: 7661/10794 cut-off events. [2023-08-03 20:53:09,332 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2023-08-03 20:53:09,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27020 conditions, 10794 events. 7661/10794 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 58239 event pairs, 2360 based on Foata normal form. 790/9878 useless extension candidates. Maximal degree in co-relation 26447. Up to 7346 conditions per place. [2023-08-03 20:53:09,363 INFO L140 encePairwiseOnDemand]: 366/372 looper letters, 90 selfloop transitions, 6 changer transitions 12/114 dead transitions. [2023-08-03 20:53:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 114 transitions, 700 flow [2023-08-03 20:53:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:09,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2023-08-03 20:53:09,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46975806451612906 [2023-08-03 20:53:09,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2023-08-03 20:53:09,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2023-08-03 20:53:09,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:09,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2023-08-03 20:53:09,367 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) [2023-08-03 20:53:09,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:09,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:09,368 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 205 flow. Second operand 4 states and 699 transitions. [2023-08-03 20:53:09,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 114 transitions, 700 flow [2023-08-03 20:53:09,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 114 transitions, 697 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 20:53:09,387 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 245 flow [2023-08-03 20:53:09,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-03 20:53:09,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-08-03 20:53:09,388 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 245 flow [2023-08-03 20:53:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:09,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:09,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:09,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 20:53:09,388 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:09,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1593376111, now seen corresponding path program 1 times [2023-08-03 20:53:09,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:09,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962851502] [2023-08-03 20:53:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:09,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:53:09,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962851502] [2023-08-03 20:53:09,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962851502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:09,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6784501] [2023-08-03 20:53:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:09,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:09,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:09,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 20:53:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:09,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 20:53:09,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-03 20:53:09,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 20:53:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6784501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 20:53:09,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 20:53:09,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-03 20:53:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574287144] [2023-08-03 20:53:09,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 20:53:09,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 20:53:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:09,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 20:53:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-03 20:53:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-03 20:53:09,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:09,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:09,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-03 20:53:09,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:10,660 INFO L124 PetriNetUnfolderBase]: 9617/13908 cut-off events. [2023-08-03 20:53:10,660 INFO L125 PetriNetUnfolderBase]: For 13139/13139 co-relation queries the response was YES. [2023-08-03 20:53:10,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36592 conditions, 13908 events. 9617/13908 cut-off events. For 13139/13139 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 79193 event pairs, 6292 based on Foata normal form. 536/12191 useless extension candidates. Maximal degree in co-relation 35839. Up to 8526 conditions per place. [2023-08-03 20:53:10,702 INFO L140 encePairwiseOnDemand]: 367/372 looper letters, 44 selfloop transitions, 2 changer transitions 38/90 dead transitions. [2023-08-03 20:53:10,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 90 transitions, 577 flow [2023-08-03 20:53:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:53:10,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:53:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 688 transitions. [2023-08-03 20:53:10,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46236559139784944 [2023-08-03 20:53:10,704 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 688 transitions. [2023-08-03 20:53:10,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 688 transitions. [2023-08-03 20:53:10,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:10,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 688 transitions. [2023-08-03 20:53:10,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:10,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:10,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:10,707 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 245 flow. Second operand 4 states and 688 transitions. [2023-08-03 20:53:10,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 90 transitions, 577 flow [2023-08-03 20:53:10,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 577 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 20:53:10,750 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 247 flow [2023-08-03 20:53:10,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2023-08-03 20:53:10,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2023-08-03 20:53:10,751 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 247 flow [2023-08-03 20:53:10,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:10,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:10,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:10,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:10,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 20:53:10,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:10,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2130352186, now seen corresponding path program 1 times [2023-08-03 20:53:10,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:10,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236960929] [2023-08-03 20:53:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:11,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236960929] [2023-08-03 20:53:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236960929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:11,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950888] [2023-08-03 20:53:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:11,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:11,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:11,287 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:11,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 20:53:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:11,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-03 20:53:11,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:11,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:11,634 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:11,634 INFO L351 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 68 treesize of output 44 [2023-08-03 20:53:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:53:11,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:11,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:11,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2023-08-03 20:53:11,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014823349] [2023-08-03 20:53:11,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:11,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-03 20:53:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-03 20:53:11,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-08-03 20:53:11,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 372 [2023-08-03 20:53:11,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:11,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:11,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 372 [2023-08-03 20:53:11,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:13,086 INFO L124 PetriNetUnfolderBase]: 10137/14030 cut-off events. [2023-08-03 20:53:13,086 INFO L125 PetriNetUnfolderBase]: For 17744/17744 co-relation queries the response was YES. [2023-08-03 20:53:13,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40124 conditions, 14030 events. 10137/14030 cut-off events. For 17744/17744 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 74475 event pairs, 281 based on Foata normal form. 1/12230 useless extension candidates. Maximal degree in co-relation 40092. Up to 4013 conditions per place. [2023-08-03 20:53:13,147 INFO L140 encePairwiseOnDemand]: 364/372 looper letters, 158 selfloop transitions, 12 changer transitions 13/188 dead transitions. [2023-08-03 20:53:13,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 188 transitions, 1210 flow [2023-08-03 20:53:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 20:53:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 20:53:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1188 transitions. [2023-08-03 20:53:13,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45622119815668205 [2023-08-03 20:53:13,149 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1188 transitions. [2023-08-03 20:53:13,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1188 transitions. [2023-08-03 20:53:13,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:13,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1188 transitions. [2023-08-03 20:53:13,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 169.71428571428572) internal successors, (1188), 7 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:13,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:13,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 372.0) internal successors, (2976), 8 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:13,154 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 247 flow. Second operand 7 states and 1188 transitions. [2023-08-03 20:53:13,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 188 transitions, 1210 flow [2023-08-03 20:53:13,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 188 transitions, 1196 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-03 20:53:13,182 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 317 flow [2023-08-03 20:53:13,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2023-08-03 20:53:13,182 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2023-08-03 20:53:13,182 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 317 flow [2023-08-03 20:53:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.0) internal successors, (1824), 12 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:13,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:13,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:13,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:13,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 20:53:13,392 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:13,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1592208008, now seen corresponding path program 1 times [2023-08-03 20:53:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:13,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601723506] [2023-08-03 20:53:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:13,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:53:13,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601723506] [2023-08-03 20:53:13,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601723506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:13,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078251205] [2023-08-03 20:53:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:13,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:13,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 20:53:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:13,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-03 20:53:13,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:53:14,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:14,102 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:14,103 INFO L351 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 68 treesize of output 44 [2023-08-03 20:53:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:53:14,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078251205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:14,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:14,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2023-08-03 20:53:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775348067] [2023-08-03 20:53:14,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 20:53:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 20:53:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-08-03 20:53:14,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 372 [2023-08-03 20:53:14,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 317 flow. Second operand has 18 states, 18 states have (on average 137.05555555555554) internal successors, (2467), 18 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:14,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:14,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 372 [2023-08-03 20:53:14,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:17,598 INFO L124 PetriNetUnfolderBase]: 14575/20133 cut-off events. [2023-08-03 20:53:17,599 INFO L125 PetriNetUnfolderBase]: For 28023/28023 co-relation queries the response was YES. [2023-08-03 20:53:17,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60640 conditions, 20133 events. 14575/20133 cut-off events. For 28023/28023 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 104160 event pairs, 67 based on Foata normal form. 53/17869 useless extension candidates. Maximal degree in co-relation 60601. Up to 5998 conditions per place. [2023-08-03 20:53:17,670 INFO L140 encePairwiseOnDemand]: 355/372 looper letters, 322 selfloop transitions, 97 changer transitions 56/479 dead transitions. [2023-08-03 20:53:17,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 479 transitions, 2984 flow [2023-08-03 20:53:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-03 20:53:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-03 20:53:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5292 transitions. [2023-08-03 20:53:17,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38448125544899736 [2023-08-03 20:53:17,680 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5292 transitions. [2023-08-03 20:53:17,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5292 transitions. [2023-08-03 20:53:17,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:53:17,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5292 transitions. [2023-08-03 20:53:17,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 143.02702702702703) internal successors, (5292), 37 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:17,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 372.0) internal successors, (14136), 38 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:17,699 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 372.0) internal successors, (14136), 38 states have internal predecessors, (14136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:17,699 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 317 flow. Second operand 37 states and 5292 transitions. [2023-08-03 20:53:17,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 479 transitions, 2984 flow [2023-08-03 20:53:17,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 479 transitions, 2742 flow, removed 78 selfloop flow, removed 3 redundant places. [2023-08-03 20:53:17,918 INFO L231 Difference]: Finished difference. Result has 119 places, 146 transitions, 1034 flow [2023-08-03 20:53:17,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1034, PETRI_PLACES=119, PETRI_TRANSITIONS=146} [2023-08-03 20:53:17,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2023-08-03 20:53:17,919 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 146 transitions, 1034 flow [2023-08-03 20:53:17,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.05555555555554) internal successors, (2467), 18 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:17,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:53:17,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:53:17,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 20:53:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 20:53:18,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:53:18,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:53:18,124 INFO L85 PathProgramCache]: Analyzing trace with hash 469370516, now seen corresponding path program 1 times [2023-08-03 20:53:18,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:53:18,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54772078] [2023-08-03 20:53:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:53:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 20:53:18,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:53:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54772078] [2023-08-03 20:53:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54772078] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:53:18,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588040165] [2023-08-03 20:53:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:53:18,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:53:18,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:53:18,795 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:53:18,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 20:53:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:53:18,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-03 20:53:18,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:53:18,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-03 20:53:19,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-03 20:53:19,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-03 20:53:19,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-03 20:53:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:53:19,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-03 20:53:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:53:19,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:53:20,297 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:20,297 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-03 20:53:20,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:20,306 INFO L351 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 148 treesize of output 140 [2023-08-03 20:53:20,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-03 20:53:20,316 INFO L351 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 64 treesize of output 52 [2023-08-03 20:53:20,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:20,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2023-08-03 20:53:20,438 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:53:20,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-03 20:53:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-03 20:53:20,446 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 20:53:20,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-03 20:53:20,453 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 20:53:20,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-03 20:53:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 20:53:20,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588040165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:53:20,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:53:20,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 28 [2023-08-03 20:53:20,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191931486] [2023-08-03 20:53:20,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:53:20,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-03 20:53:20,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:53:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-03 20:53:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=693, Unknown=9, NotChecked=0, Total=812 [2023-08-03 20:53:21,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 372 [2023-08-03 20:53:21,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 146 transitions, 1034 flow. Second operand has 29 states, 29 states have (on average 104.17241379310344) internal successors, (3021), 29 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:53:21,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:53:21,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 372 [2023-08-03 20:53:21,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:53:36,120 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_thread1Thread2of2ForFork1_thidvar0 1)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))) (and (<= .cse0 .cse1) (or (<= c_~n~0 c_~front~0) (<= c_~back~0 c_~front~0) (let ((.cse2 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_503 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_503) c_~queue~0.base) .cse2) c_~sum~0))) (forall ((v_ArrVal_503 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_503) c_~queue~0.base) .cse2) c_~sum~0) 1)))) (< c_~front~0 0)) (<= 0 c_~sum~0) (<= 0 |c_ULTIMATE.start_main_~#t2~0#1.offset|) (<= c_~sum~0 1) (<= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (= |c_ULTIMATE.start_main_~asdf~1#1| 0) (<= .cse1 .cse0))) is different from false [2023-08-03 20:53:50,938 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_thread1Thread2of2ForFork1_thidvar0 1)) (.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0))) (and (<= .cse0 .cse1) (or (<= c_~n~0 c_~front~0) (<= c_~back~0 c_~front~0) (let ((.cse2 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_503 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_503) c_~queue~0.base) .cse2) c_~sum~0))) (forall ((v_ArrVal_503 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_503) c_~queue~0.base) .cse2) c_~sum~0) 1)))) (< c_~front~0 0)) (<= 0 c_~sum~0) (<= 0 |c_ULTIMATE.start_main_~#t2~0#1.offset|) (<= c_~sum~0 1) (<= |c_ULTIMATE.start_main_~#t2~0#1.offset| 0) (<= .cse1 .cse0))) is different from false [2023-08-03 20:54:03,985 WARN L233 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 75 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-03 20:54:17,605 INFO L124 PetriNetUnfolderBase]: 86593/121544 cut-off events. [2023-08-03 20:54:17,606 INFO L125 PetriNetUnfolderBase]: For 206622/206622 co-relation queries the response was YES. [2023-08-03 20:54:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372118 conditions, 121544 events. 86593/121544 cut-off events. For 206622/206622 co-relation queries the response was YES. Maximal size of possible extension queue 3249. Compared 834274 event pairs, 10736 based on Foata normal form. 318/106249 useless extension candidates. Maximal degree in co-relation 370718. Up to 15610 conditions per place. [2023-08-03 20:54:18,646 INFO L140 encePairwiseOnDemand]: 344/372 looper letters, 1201 selfloop transitions, 725 changer transitions 97/2029 dead transitions. [2023-08-03 20:54:18,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 2029 transitions, 14609 flow [2023-08-03 20:54:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-08-03 20:54:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2023-08-03 20:54:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 15747 transitions. [2023-08-03 20:54:18,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3002173415694349 [2023-08-03 20:54:18,670 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 15747 transitions. [2023-08-03 20:54:18,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 15747 transitions. [2023-08-03 20:54:18,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:54:18,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 15747 transitions. [2023-08-03 20:54:18,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 111.68085106382979) internal successors, (15747), 141 states have internal predecessors, (15747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:18,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 372.0) internal successors, (52824), 142 states have internal predecessors, (52824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:18,737 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 372.0) internal successors, (52824), 142 states have internal predecessors, (52824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:18,737 INFO L175 Difference]: Start difference. First operand has 119 places, 146 transitions, 1034 flow. Second operand 141 states and 15747 transitions. [2023-08-03 20:54:18,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 2029 transitions, 14609 flow [2023-08-03 20:54:26,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 2029 transitions, 13995 flow, removed 135 selfloop flow, removed 7 redundant places. [2023-08-03 20:54:26,373 INFO L231 Difference]: Finished difference. Result has 283 places, 1005 transitions, 9045 flow [2023-08-03 20:54:26,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=9045, PETRI_PLACES=283, PETRI_TRANSITIONS=1005} [2023-08-03 20:54:26,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2023-08-03 20:54:26,373 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 1005 transitions, 9045 flow [2023-08-03 20:54:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.17241379310344) internal successors, (3021), 29 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:26,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:54:26,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:54:26,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-03 20:54:26,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 20:54:26,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:54:26,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:54:26,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1826638997, now seen corresponding path program 2 times [2023-08-03 20:54:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:54:26,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83024288] [2023-08-03 20:54:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:54:26,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:54:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:54:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:54:27,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:54:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83024288] [2023-08-03 20:54:27,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83024288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:54:27,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138730166] [2023-08-03 20:54:27,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 20:54:27,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:54:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:54:27,690 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:54:27,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 20:54:27,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 20:54:27,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 20:54:27,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-03 20:54:27,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:54:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 20:54:27,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-03 20:54:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 20:54:28,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:54:28,161 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_546 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_546) c_~queue~0.base) .cse0)))) (forall ((v_ArrVal_546 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_546) c_~queue~0.base) .cse0)) 1)))) is different from false [2023-08-03 20:54:28,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 20:54:28,180 INFO L351 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 110 treesize of output 86 [2023-08-03 20:54:28,184 INFO L351 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 53 treesize of output 47 [2023-08-03 20:54:28,187 INFO L351 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 47 treesize of output 41 [2023-08-03 20:54:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 3 not checked. [2023-08-03 20:54:28,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138730166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:54:28,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:54:28,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 21 [2023-08-03 20:54:28,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078151285] [2023-08-03 20:54:28,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:54:28,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-03 20:54:28,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:54:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-03 20:54:28,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=402, Unknown=1, NotChecked=40, Total=506 [2023-08-03 20:54:28,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 372 [2023-08-03 20:54:28,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 1005 transitions, 9045 flow. Second operand has 23 states, 23 states have (on average 123.69565217391305) internal successors, (2845), 23 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:28,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:54:28,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 372 [2023-08-03 20:54:28,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:54:51,501 INFO L124 PetriNetUnfolderBase]: 102707/144306 cut-off events. [2023-08-03 20:54:51,501 INFO L125 PetriNetUnfolderBase]: For 549180/549262 co-relation queries the response was YES. [2023-08-03 20:54:52,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669533 conditions, 144306 events. 102707/144306 cut-off events. For 549180/549262 co-relation queries the response was YES. Maximal size of possible extension queue 4093. Compared 1025669 event pairs, 17971 based on Foata normal form. 11/125572 useless extension candidates. Maximal degree in co-relation 667565. Up to 62114 conditions per place. [2023-08-03 20:54:53,215 INFO L140 encePairwiseOnDemand]: 363/372 looper letters, 828 selfloop transitions, 576 changer transitions 19/1490 dead transitions. [2023-08-03 20:54:53,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 1490 transitions, 15843 flow [2023-08-03 20:54:53,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 20:54:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 20:54:53,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1963 transitions. [2023-08-03 20:54:53,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769201228878648 [2023-08-03 20:54:53,218 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1963 transitions. [2023-08-03 20:54:53,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1963 transitions. [2023-08-03 20:54:53,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:54:53,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1963 transitions. [2023-08-03 20:54:53,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 140.21428571428572) internal successors, (1963), 14 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:53,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:53,224 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 372.0) internal successors, (5580), 15 states have internal predecessors, (5580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:54:53,224 INFO L175 Difference]: Start difference. First operand has 283 places, 1005 transitions, 9045 flow. Second operand 14 states and 1963 transitions. [2023-08-03 20:54:53,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 1490 transitions, 15843 flow [2023-08-03 20:55:52,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 1490 transitions, 14347 flow, removed 729 selfloop flow, removed 5 redundant places. [2023-08-03 20:55:52,278 INFO L231 Difference]: Finished difference. Result has 293 places, 1128 transitions, 10708 flow [2023-08-03 20:55:52,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=7838, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10708, PETRI_PLACES=293, PETRI_TRANSITIONS=1128} [2023-08-03 20:55:52,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2023-08-03 20:55:52,278 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 1128 transitions, 10708 flow [2023-08-03 20:55:52,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 123.69565217391305) internal successors, (2845), 23 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:55:52,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:55:52,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:55:52,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-03 20:55:52,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:55:52,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:55:52,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:55:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash -694263095, now seen corresponding path program 1 times [2023-08-03 20:55:52,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:55:52,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910574917] [2023-08-03 20:55:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:55:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:55:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:55:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:55:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:55:52,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910574917] [2023-08-03 20:55:52,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910574917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:55:52,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057869287] [2023-08-03 20:55:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:55:52,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:55:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:55:52,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:55:52,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 20:55:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:55:52,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 20:55:52,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:55:52,751 INFO L351 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 124 treesize of output 92 [2023-08-03 20:55:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:55:52,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:55:52,867 INFO L351 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 136 treesize of output 104 [2023-08-03 20:55:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 20:55:52,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057869287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:55:52,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:55:52,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-08-03 20:55:52,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197696344] [2023-08-03 20:55:52,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:55:52,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 20:55:52,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:55:52,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 20:55:52,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 20:55:53,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 372 [2023-08-03 20:55:53,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 1128 transitions, 10708 flow. Second operand has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:55:53,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:55:53,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 372 [2023-08-03 20:55:53,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 20:56:27,690 INFO L124 PetriNetUnfolderBase]: 155569/220677 cut-off events. [2023-08-03 20:56:27,690 INFO L125 PetriNetUnfolderBase]: For 941600/941772 co-relation queries the response was YES. [2023-08-03 20:56:29,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1009776 conditions, 220677 events. 155569/220677 cut-off events. For 941600/941772 co-relation queries the response was YES. Maximal size of possible extension queue 6376. Compared 1696971 event pairs, 37011 based on Foata normal form. 6257/196771 useless extension candidates. Maximal degree in co-relation 1006641. Up to 108748 conditions per place. [2023-08-03 20:56:30,780 INFO L140 encePairwiseOnDemand]: 367/372 looper letters, 872 selfloop transitions, 530 changer transitions 20/1504 dead transitions. [2023-08-03 20:56:30,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1504 transitions, 17400 flow [2023-08-03 20:56:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 20:56:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 20:56:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2023-08-03 20:56:30,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47647849462365593 [2023-08-03 20:56:30,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2023-08-03 20:56:30,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2023-08-03 20:56:30,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 20:56:30,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2023-08-03 20:56:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:56:30,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:56:30,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:56:30,783 INFO L175 Difference]: Start difference. First operand has 293 places, 1128 transitions, 10708 flow. Second operand 4 states and 709 transitions. [2023-08-03 20:56:30,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1504 transitions, 17400 flow [2023-08-03 20:57:38,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1504 transitions, 16792 flow, removed 77 selfloop flow, removed 11 redundant places. [2023-08-03 20:57:38,357 INFO L231 Difference]: Finished difference. Result has 279 places, 1332 transitions, 15170 flow [2023-08-03 20:57:38,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=9607, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=15170, PETRI_PLACES=279, PETRI_TRANSITIONS=1332} [2023-08-03 20:57:38,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2023-08-03 20:57:38,358 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 1332 transitions, 15170 flow [2023-08-03 20:57:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:57:38,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 20:57:38,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 20:57:38,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 20:57:38,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:57:38,563 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 20:57:38,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 20:57:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -472244593, now seen corresponding path program 1 times [2023-08-03 20:57:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 20:57:38,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365574811] [2023-08-03 20:57:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:57:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 20:57:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:57:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 20:57:38,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 20:57:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365574811] [2023-08-03 20:57:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365574811] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 20:57:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899209080] [2023-08-03 20:57:38,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 20:57:38,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 20:57:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 20:57:38,911 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 20:57:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 20:57:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 20:57:39,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-03 20:57:39,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 20:57:39,123 INFO L351 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 13 treesize of output 5 [2023-08-03 20:57:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:57:39,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 20:57:39,242 INFO L351 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 128 treesize of output 96 [2023-08-03 20:57:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 20:57:39,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899209080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 20:57:39,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 20:57:39,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-08-03 20:57:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685441283] [2023-08-03 20:57:39,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 20:57:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-03 20:57:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 20:57:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-03 20:57:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2023-08-03 20:57:39,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 372 [2023-08-03 20:57:39,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 1332 transitions, 15170 flow. Second operand has 20 states, 20 states have (on average 147.1) internal successors, (2942), 20 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 20:57:39,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 20:57:39,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 372 [2023-08-03 20:57:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand