/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3-extended.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:29:07,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:29:07,190 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:29:07,195 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:29:07,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:29:07,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:29:07,196 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:29:07,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:29:07,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:29:07,221 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:29:07,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:29:07,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:29:07,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:29:07,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:29:07,223 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:29:07,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:29:07,224 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:29:07,224 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:29:07,224 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:29:07,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:29:07,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:29:07,225 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:29:07,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:29:07,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:29:07,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:29:07,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:29:07,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:29:07,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:29:07,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:29:07,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:29:07,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:29:07,229 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:29:07,229 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:29:07,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:29:07,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:29:07,229 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:29:07,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:29:07,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:29:07,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:29:07,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:29:07,459 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:29:07,460 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:29:07,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 02:29:08,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:29:08,841 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:29:08,841 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 02:29:08,850 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63eaaf39/a66c1f5dfe514a9d992e9c06a518bd03/FLAG4defd7968 [2023-08-04 02:29:08,866 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a63eaaf39/a66c1f5dfe514a9d992e9c06a518bd03 [2023-08-04 02:29:08,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:29:08,880 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:29:08,883 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:29:08,883 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:29:08,886 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:29:08,886 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:29:08" (1/1) ... [2023-08-04 02:29:08,887 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f1765a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:08, skipping insertion in model container [2023-08-04 02:29:08,887 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:29:08" (1/1) ... [2023-08-04 02:29:08,911 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:29:09,033 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_parallel-misc-3-extended.wvr_bound2.c[3099,3112] [2023-08-04 02:29:09,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:29:09,041 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:29:09,058 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_parallel-misc-3-extended.wvr_bound2.c[3099,3112] [2023-08-04 02:29:09,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:29:09,065 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:29:09,065 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:29:09,070 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:29:09,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09 WrapperNode [2023-08-04 02:29:09,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:29:09,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:29:09,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:29:09,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:29:09,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,082 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,097 INFO L138 Inliner]: procedures = 22, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 119 [2023-08-04 02:29:09,098 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:29:09,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:29:09,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:29:09,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:29:09,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,106 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,108 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,114 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,120 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:29:09,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:29:09,125 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:29:09,125 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:29:09,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (1/1) ... [2023-08-04 02:29:09,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:29:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:29:09,157 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) [2023-08-04 02:29:09,177 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 [2023-08-04 02:29:09,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:29:09,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:29:09,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:29:09,211 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:29:09,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:29:09,212 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:29:09,212 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:29:09,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:29:09,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:29:09,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:29:09,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:29:09,214 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:29:09,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:29:09,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:29:09,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:29:09,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:29:09,216 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:29:09,296 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:29:09,297 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:29:09,520 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:29:09,542 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:29:09,542 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 02:29:09,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:29:09 BoogieIcfgContainer [2023-08-04 02:29:09,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:29:09,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:29:09,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:29:09,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:29:09,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:29:08" (1/3) ... [2023-08-04 02:29:09,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ff7216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:29:09, skipping insertion in model container [2023-08-04 02:29:09,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:29:09" (2/3) ... [2023-08-04 02:29:09,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ff7216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:29:09, skipping insertion in model container [2023-08-04 02:29:09,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:29:09" (3/3) ... [2023-08-04 02:29:09,552 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-misc-3-extended.wvr_bound2.c [2023-08-04 02:29:09,558 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:29:09,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:29:09,566 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:29:09,566 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:29:09,638 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:29:09,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,832 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 02:29:09,832 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:29:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 02:29:09,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:29:09,870 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,875 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 175 transitions, 392 flow [2023-08-04 02:29:09,944 INFO L124 PetriNetUnfolderBase]: 117/675 cut-off events. [2023-08-04 02:29:09,944 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 02:29:09,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 736 conditions, 675 events. 117/675 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3560 event pairs, 0 based on Foata normal form. 0/548 useless extension candidates. Maximal degree in co-relation 354. Up to 16 conditions per place. [2023-08-04 02:29:09,962 INFO L119 LiptonReduction]: Number of co-enabled transitions 10260 [2023-08-04 02:29:12,915 INFO L134 LiptonReduction]: Checked pairs total: 13399 [2023-08-04 02:29:12,915 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-04 02:29:12,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:29:12,938 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;@788541c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:29:12,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:29:12,941 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:29:12,941 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-08-04 02:29:12,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:29:12,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:29:12,941 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 02:29:12,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:29:12,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:29:12,945 INFO L85 PathProgramCache]: Analyzing trace with hash -340574275, now seen corresponding path program 1 times [2023-08-04 02:29:12,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:29:12,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037637624] [2023-08-04 02:29:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:29:12,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:29:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:29:13,051 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:29:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:29:13,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:29:13,099 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:29:13,100 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:29:13,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:29:13,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:29:13,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:29:13,102 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 02:29:13,105 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:29:13,106 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:29:13,106 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:29:13,148 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:29:13,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:13,682 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 02:29:13,682 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:29:13,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 02:29:13,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:13,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:13,735 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:29:13,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:13,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:13,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:29:14,108 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 02:29:14,108 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:29:14,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 02:29:14,313 INFO L119 LiptonReduction]: Number of co-enabled transitions 28620 [2023-08-04 02:29:16,896 INFO L134 LiptonReduction]: Checked pairs total: 117155 [2023-08-04 02:29:16,896 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 02:29:16,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:29:16,898 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;@788541c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:29:16,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:29:16,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:29:16,905 INFO L124 PetriNetUnfolderBase]: 21/152 cut-off events. [2023-08-04 02:29:16,905 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 02:29:16,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:29:16,905 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 02:29:16,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:29:16,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:29:16,906 INFO L85 PathProgramCache]: Analyzing trace with hash 472764338, now seen corresponding path program 1 times [2023-08-04 02:29:16,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:29:16,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708133871] [2023-08-04 02:29:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:29:16,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:29:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:29:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:29:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:29:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708133871] [2023-08-04 02:29:17,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708133871] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:29:17,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055781658] [2023-08-04 02:29:17,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:29:17,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:29:17,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:29:17,097 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) [2023-08-04 02:29:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:29:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:29:17,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:29:17,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:29:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:29:17,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:29:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055781658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:29:17,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:29:17,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 02:29:17,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373154471] [2023-08-04 02:29:17,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:29:17,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:29:17,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:29:17,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:29:17,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:29:17,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:29:17,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:29:17,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:29:17,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:29:17,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:29:53,833 INFO L124 PetriNetUnfolderBase]: 475857/570966 cut-off events. [2023-08-04 02:29:53,833 INFO L125 PetriNetUnfolderBase]: For 38986/38986 co-relation queries the response was YES. [2023-08-04 02:29:57,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150704 conditions, 570966 events. 475857/570966 cut-off events. For 38986/38986 co-relation queries the response was YES. Maximal size of possible extension queue 17357. Compared 3216484 event pairs, 139373 based on Foata normal form. 0/441523 useless extension candidates. Maximal degree in co-relation 311897. Up to 545993 conditions per place. [2023-08-04 02:30:00,847 INFO L140 encePairwiseOnDemand]: 390/395 looper letters, 88 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2023-08-04 02:30:00,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 538 flow [2023-08-04 02:30:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:30:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:30:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1065 transitions. [2023-08-04 02:30:00,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392405063291139 [2023-08-04 02:30:00,872 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1065 transitions. [2023-08-04 02:30:00,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1065 transitions. [2023-08-04 02:30:00,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:00,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1065 transitions. [2023-08-04 02:30:00,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:00,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:00,899 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:00,900 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 316 flow. Second operand 5 states and 1065 transitions. [2023-08-04 02:30:00,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 538 flow [2023-08-04 02:30:00,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 133 transitions, 530 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:30:00,934 INFO L231 Difference]: Finished difference. Result has 91 places, 114 transitions, 323 flow [2023-08-04 02:30:00,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=323, PETRI_PLACES=91, PETRI_TRANSITIONS=114} [2023-08-04 02:30:00,940 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2023-08-04 02:30:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 114 transitions, 323 flow [2023-08-04 02:30:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 195.6) internal successors, (978), 5 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:00,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:00,942 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:30:00,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:30:01,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:01,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:30:01,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1464127880, now seen corresponding path program 1 times [2023-08-04 02:30:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749165070] [2023-08-04 02:30:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:01,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:01,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:01,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749165070] [2023-08-04 02:30:01,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749165070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:30:01,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:30:01,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:30:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130174191] [2023-08-04 02:30:01,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:30:01,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:30:01,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:01,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:30:01,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:30:01,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:30:01,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 114 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:01,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:01,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:30:01,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:30:36,618 INFO L124 PetriNetUnfolderBase]: 473507/566917 cut-off events. [2023-08-04 02:30:36,619 INFO L125 PetriNetUnfolderBase]: For 35461/35461 co-relation queries the response was YES. [2023-08-04 02:30:39,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139707 conditions, 566917 events. 473507/566917 cut-off events. For 35461/35461 co-relation queries the response was YES. Maximal size of possible extension queue 17230. Compared 3159441 event pairs, 180332 based on Foata normal form. 1/438505 useless extension candidates. Maximal degree in co-relation 252647. Up to 543237 conditions per place. [2023-08-04 02:30:42,580 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 78 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-04 02:30:42,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 120 transitions, 494 flow [2023-08-04 02:30:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:30:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:30:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-08-04 02:30:42,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611814345991561 [2023-08-04 02:30:42,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-08-04 02:30:42,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-08-04 02:30:42,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:30:42,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-08-04 02:30:42,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,610 INFO L175 Difference]: Start difference. First operand has 91 places, 114 transitions, 323 flow. Second operand 3 states and 665 transitions. [2023-08-04 02:30:42,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 120 transitions, 494 flow [2023-08-04 02:30:42,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 120 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:30:42,635 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 321 flow [2023-08-04 02:30:42,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-08-04 02:30:42,635 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:30:42,636 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 321 flow [2023-08-04 02:30:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:30:42,641 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:30:42,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:30:42,642 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:30:42,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:30:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash 191083926, now seen corresponding path program 1 times [2023-08-04 02:30:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:30:42,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409327902] [2023-08-04 02:30:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:42,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:30:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:42,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:30:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409327902] [2023-08-04 02:30:42,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409327902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:30:42,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897265313] [2023-08-04 02:30:42,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:30:42,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:30:42,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:30:42,786 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) [2023-08-04 02:30:42,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:30:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:30:42,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:30:42,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:30:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:42,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:30:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:30:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897265313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:30:42,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:30:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:30:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347916859] [2023-08-04 02:30:42,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:30:42,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:30:42,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:30:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:30:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:30:42,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:30:42,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:30:42,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:30:42,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:30:42,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:18,037 INFO L124 PetriNetUnfolderBase]: 460915/549977 cut-off events. [2023-08-04 02:31:18,038 INFO L125 PetriNetUnfolderBase]: For 34697/34697 co-relation queries the response was YES. [2023-08-04 02:31:21,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106972 conditions, 549977 events. 460915/549977 cut-off events. For 34697/34697 co-relation queries the response was YES. Maximal size of possible extension queue 17136. Compared 3028451 event pairs, 135024 based on Foata normal form. 4/426432 useless extension candidates. Maximal degree in co-relation 372690. Up to 528657 conditions per place. [2023-08-04 02:31:23,954 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 88 selfloop transitions, 3 changer transitions 0/131 dead transitions. [2023-08-04 02:31:23,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 131 transitions, 538 flow [2023-08-04 02:31:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:31:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:31:23,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 868 transitions. [2023-08-04 02:31:23,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549367088607595 [2023-08-04 02:31:23,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 868 transitions. [2023-08-04 02:31:23,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 868 transitions. [2023-08-04 02:31:23,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:31:23,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 868 transitions. [2023-08-04 02:31:23,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.0) internal successors, (868), 4 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:23,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:23,985 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:23,985 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 321 flow. Second operand 4 states and 868 transitions. [2023-08-04 02:31:23,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 131 transitions, 538 flow [2023-08-04 02:31:24,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:31:24,028 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 318 flow [2023-08-04 02:31:24,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2023-08-04 02:31:24,031 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2023-08-04 02:31:24,049 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 318 flow [2023-08-04 02:31:24,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:24,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:31:24,054 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:31:24,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:31:24,254 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,SelfDestructingSolverStorable3 [2023-08-04 02:31:24,254 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:31:24,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:31:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -267146173, now seen corresponding path program 1 times [2023-08-04 02:31:24,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:31:24,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997600676] [2023-08-04 02:31:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:24,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:31:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:31:24,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:31:24,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997600676] [2023-08-04 02:31:24,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997600676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:31:24,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963058762] [2023-08-04 02:31:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:31:24,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:31:24,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:31:24,389 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) [2023-08-04 02:31:24,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:31:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:31:24,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:31:24,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:31:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:31:24,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:31:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963058762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:31:24,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:31:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:31:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297386560] [2023-08-04 02:31:24,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:31:24,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:31:24,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:31:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:31:24,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:31:24,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:31:24,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 318 flow. Second operand has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:31:24,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:31:24,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:31:24,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:31:58,138 INFO L124 PetriNetUnfolderBase]: 460147/549581 cut-off events. [2023-08-04 02:31:58,138 INFO L125 PetriNetUnfolderBase]: For 33105/33105 co-relation queries the response was YES. [2023-08-04 02:32:00,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1105440 conditions, 549581 events. 460147/549581 cut-off events. For 33105/33105 co-relation queries the response was YES. Maximal size of possible extension queue 17153. Compared 3041615 event pairs, 100922 based on Foata normal form. 0/426428 useless extension candidates. Maximal degree in co-relation 272123. Up to 525904 conditions per place. [2023-08-04 02:32:03,585 INFO L140 encePairwiseOnDemand]: 391/395 looper letters, 119 selfloop transitions, 5 changer transitions 0/163 dead transitions. [2023-08-04 02:32:03,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 163 transitions, 664 flow [2023-08-04 02:32:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:32:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:32:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1094 transitions. [2023-08-04 02:32:03,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539240506329114 [2023-08-04 02:32:03,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1094 transitions. [2023-08-04 02:32:03,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1094 transitions. [2023-08-04 02:32:03,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:32:03,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1094 transitions. [2023-08-04 02:32:03,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.8) internal successors, (1094), 5 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:03,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:03,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:03,597 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 318 flow. Second operand 5 states and 1094 transitions. [2023-08-04 02:32:03,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 163 transitions, 664 flow [2023-08-04 02:32:03,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 163 transitions, 650 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 02:32:03,623 INFO L231 Difference]: Finished difference. Result has 92 places, 114 transitions, 321 flow [2023-08-04 02:32:03,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=92, PETRI_TRANSITIONS=114} [2023-08-04 02:32:03,624 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:32:03,624 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 114 transitions, 321 flow [2023-08-04 02:32:03,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:03,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:32:03,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:32:03,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:32:03,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:32:03,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:32:03,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:32:03,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1308969535, now seen corresponding path program 1 times [2023-08-04 02:32:03,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:32:03,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135946177] [2023-08-04 02:32:03,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:32:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:32:03,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:32:03,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135946177] [2023-08-04 02:32:03,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135946177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:32:03,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:32:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:32:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517296287] [2023-08-04 02:32:03,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:32:03,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:32:03,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:32:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:32:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:32:03,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:32:03,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 114 transitions, 321 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:03,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:32:03,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:32:03,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:32:35,490 INFO L124 PetriNetUnfolderBase]: 456835/544362 cut-off events. [2023-08-04 02:32:35,490 INFO L125 PetriNetUnfolderBase]: For 28846/28846 co-relation queries the response was YES. [2023-08-04 02:32:38,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091592 conditions, 544362 events. 456835/544362 cut-off events. For 28846/28846 co-relation queries the response was YES. Maximal size of possible extension queue 17873. Compared 2991565 event pairs, 182482 based on Foata normal form. 16/422633 useless extension candidates. Maximal degree in co-relation 268480. Up to 523570 conditions per place. [2023-08-04 02:32:40,573 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 89 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-08-04 02:32:40,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 534 flow [2023-08-04 02:32:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:32:40,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:32:40,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-04 02:32:40,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569620253164557 [2023-08-04 02:32:40,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-04 02:32:40,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-04 02:32:40,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:32:40,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-04 02:32:40,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:40,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:40,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:40,594 INFO L175 Difference]: Start difference. First operand has 92 places, 114 transitions, 321 flow. Second operand 3 states and 675 transitions. [2023-08-04 02:32:40,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 534 flow [2023-08-04 02:32:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 533 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:32:40,625 INFO L231 Difference]: Finished difference. Result has 93 places, 113 transitions, 319 flow [2023-08-04 02:32:40,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=93, PETRI_TRANSITIONS=113} [2023-08-04 02:32:40,626 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 3 predicate places. [2023-08-04 02:32:40,626 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 113 transitions, 319 flow [2023-08-04 02:32:40,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:40,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:32:40,626 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:32:40,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 02:32:40,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:32:40,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:32:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash -199085078, now seen corresponding path program 1 times [2023-08-04 02:32:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:32:40,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829942449] [2023-08-04 02:32:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:32:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:32:40,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:32:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829942449] [2023-08-04 02:32:40,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829942449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:32:40,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55996454] [2023-08-04 02:32:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:32:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:32:40,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:32:40,707 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) [2023-08-04 02:32:40,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:32:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:32:40,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:32:40,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:32:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:32:40,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:32:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 02:32:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55996454] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:32:40,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:32:40,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:32:40,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727245340] [2023-08-04 02:32:40,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:32:40,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:32:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:32:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:32:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:32:40,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:32:40,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 113 transitions, 319 flow. Second operand has 5 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:32:40,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:32:40,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:32:40,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:33:12,452 INFO L124 PetriNetUnfolderBase]: 444467/528298 cut-off events. [2023-08-04 02:33:12,452 INFO L125 PetriNetUnfolderBase]: For 28230/28230 co-relation queries the response was YES. [2023-08-04 02:33:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060440 conditions, 528298 events. 444467/528298 cut-off events. For 28230/28230 co-relation queries the response was YES. Maximal size of possible extension queue 17851. Compared 2899689 event pairs, 145578 based on Foata normal form. 48/411049 useless extension candidates. Maximal degree in co-relation 259324. Up to 508194 conditions per place. [2023-08-04 02:33:17,541 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 107 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2023-08-04 02:33:17,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 610 flow [2023-08-04 02:33:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:33:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:33:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 886 transitions. [2023-08-04 02:33:17,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607594936708861 [2023-08-04 02:33:17,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 886 transitions. [2023-08-04 02:33:17,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 886 transitions. [2023-08-04 02:33:17,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:33:17,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 886 transitions. [2023-08-04 02:33:17,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.5) internal successors, (886), 4 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:17,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:17,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 395.0) internal successors, (1975), 5 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:17,573 INFO L175 Difference]: Start difference. First operand has 93 places, 113 transitions, 319 flow. Second operand 4 states and 886 transitions. [2023-08-04 02:33:17,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 610 flow [2023-08-04 02:33:17,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 149 transitions, 606 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:33:17,584 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 316 flow [2023-08-04 02:33:17,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2023-08-04 02:33:17,600 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2023-08-04 02:33:17,601 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 316 flow [2023-08-04 02:33:17,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:17,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:33:17,601 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:33:17,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:33:17,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:33:17,806 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:33:17,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:33:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1636155598, now seen corresponding path program 1 times [2023-08-04 02:33:17,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:33:17,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678690974] [2023-08-04 02:33:17,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:33:17,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:33:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:33:17,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:33:17,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:33:17,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678690974] [2023-08-04 02:33:17,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678690974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:33:17,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958530717] [2023-08-04 02:33:17,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:33:17,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:33:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:33:17,930 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) [2023-08-04 02:33:18,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:33:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:33:18,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:33:18,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:33:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:33:18,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:33:18,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958530717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:33:18,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:33:18,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:33:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668649304] [2023-08-04 02:33:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:33:18,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:33:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:33:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:33:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:33:18,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:33:18,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:18,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:33:18,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:33:18,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:33:50,385 INFO L124 PetriNetUnfolderBase]: 433667/517642 cut-off events. [2023-08-04 02:33:50,385 INFO L125 PetriNetUnfolderBase]: For 19826/19826 co-relation queries the response was YES. [2023-08-04 02:33:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036104 conditions, 517642 events. 433667/517642 cut-off events. For 19826/19826 co-relation queries the response was YES. Maximal size of possible extension queue 17614. Compared 2862797 event pairs, 3714 based on Foata normal form. 0/405201 useless extension candidates. Maximal degree in co-relation 252088. Up to 471760 conditions per place. [2023-08-04 02:33:53,643 INFO L140 encePairwiseOnDemand]: 391/395 looper letters, 0 selfloop transitions, 0 changer transitions 187/187 dead transitions. [2023-08-04 02:33:53,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 187 transitions, 760 flow [2023-08-04 02:33:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:33:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:33:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1118 transitions. [2023-08-04 02:33:53,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660759493670886 [2023-08-04 02:33:53,660 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1118 transitions. [2023-08-04 02:33:53,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1118 transitions. [2023-08-04 02:33:53,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:33:53,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1118 transitions. [2023-08-04 02:33:53,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.6) internal successors, (1118), 5 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:53,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:53,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 395.0) internal successors, (2370), 6 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:53,665 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 316 flow. Second operand 5 states and 1118 transitions. [2023-08-04 02:33:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 187 transitions, 760 flow [2023-08-04 02:33:53,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 187 transitions, 746 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 02:33:53,793 INFO L231 Difference]: Finished difference. Result has 92 places, 0 transitions, 0 flow [2023-08-04 02:33:53,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=92, PETRI_TRANSITIONS=0} [2023-08-04 02:33:53,795 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:33:53,795 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 0 transitions, 0 flow [2023-08-04 02:33:53,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:53,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:33:53,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:33:53,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:33:53,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:33:53,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:33:53,997 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:33:53,998 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:33:54,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:54,680 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 02:33:54,680 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:33:54,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 02:33:54,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:54,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:54,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:33:54,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:54,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:54,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 241 transitions, 572 flow [2023-08-04 02:33:55,086 INFO L124 PetriNetUnfolderBase]: 964/4316 cut-off events. [2023-08-04 02:33:55,086 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 02:33:55,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 4316 events. 964/4316 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 34591 event pairs, 11 based on Foata normal form. 0/3596 useless extension candidates. Maximal degree in co-relation 2561. Up to 192 conditions per place. [2023-08-04 02:33:55,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 28620 [2023-08-04 02:33:57,477 INFO L134 LiptonReduction]: Checked pairs total: 117364 [2023-08-04 02:33:57,477 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 02:33:57,479 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:33:57,479 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;@788541c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:33:57,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:33:57,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:33:57,481 INFO L124 PetriNetUnfolderBase]: 2/35 cut-off events. [2023-08-04 02:33:57,481 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:33:57,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:33:57,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:33:57,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:33:57,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:33:57,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1772591542, now seen corresponding path program 1 times [2023-08-04 02:33:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:33:57,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115623553] [2023-08-04 02:33:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:33:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:33:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:33:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:33:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:33:57,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115623553] [2023-08-04 02:33:57,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115623553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:33:57,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:33:57,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:33:57,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898853451] [2023-08-04 02:33:57,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:33:57,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:33:57,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:33:57,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:33:57,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:33:57,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:33:57,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:33:57,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:33:57,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:33:57,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:34:32,248 INFO L124 PetriNetUnfolderBase]: 456251/547859 cut-off events. [2023-08-04 02:34:32,249 INFO L125 PetriNetUnfolderBase]: For 42706/42706 co-relation queries the response was YES. [2023-08-04 02:34:35,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106650 conditions, 547859 events. 456251/547859 cut-off events. For 42706/42706 co-relation queries the response was YES. Maximal size of possible extension queue 17121. Compared 3097180 event pairs, 180344 based on Foata normal form. 0/419748 useless extension candidates. Maximal degree in co-relation 300029. Up to 526137 conditions per place. [2023-08-04 02:34:38,324 INFO L140 encePairwiseOnDemand]: 391/395 looper letters, 76 selfloop transitions, 2 changer transitions 1/120 dead transitions. [2023-08-04 02:34:38,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 486 flow [2023-08-04 02:34:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:34:38,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:34:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 665 transitions. [2023-08-04 02:34:38,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611814345991561 [2023-08-04 02:34:38,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 665 transitions. [2023-08-04 02:34:38,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 665 transitions. [2023-08-04 02:34:38,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:34:38,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 665 transitions. [2023-08-04 02:34:38,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:38,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:38,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:38,335 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 316 flow. Second operand 3 states and 665 transitions. [2023-08-04 02:34:38,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 486 flow [2023-08-04 02:34:38,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 120 transitions, 486 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:34:38,363 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 320 flow [2023-08-04 02:34:38,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=320, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2023-08-04 02:34:38,364 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:34:38,364 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 320 flow [2023-08-04 02:34:38,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:38,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:34:38,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:34:38,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 02:34:38,365 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:34:38,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:34:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash -318362773, now seen corresponding path program 1 times [2023-08-04 02:34:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:34:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166443432] [2023-08-04 02:34:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:34:38,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:34:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:34:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:34:38,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:34:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166443432] [2023-08-04 02:34:38,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166443432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:34:38,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439530491] [2023-08-04 02:34:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:34:38,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:34:38,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:34:38,392 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) [2023-08-04 02:34:38,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 02:34:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:34:38,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:34:38,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:34:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:34:38,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:34:38,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439530491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:34:38,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:34:38,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:34:38,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100068300] [2023-08-04 02:34:38,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:34:38,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:34:38,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:34:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:34:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:34:38,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:34:38,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 320 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:34:38,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:34:38,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:34:38,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:35:11,201 INFO L124 PetriNetUnfolderBase]: 452599/544350 cut-off events. [2023-08-04 02:35:11,201 INFO L125 PetriNetUnfolderBase]: For 39663/39663 co-relation queries the response was YES. [2023-08-04 02:35:14,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1098832 conditions, 544350 events. 452599/544350 cut-off events. For 39663/39663 co-relation queries the response was YES. Maximal size of possible extension queue 17937. Compared 3102492 event pairs, 186221 based on Foata normal form. 0/417339 useless extension candidates. Maximal degree in co-relation 638505. Up to 521144 conditions per place. [2023-08-04 02:35:17,407 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 87 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-08-04 02:35:17,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 534 flow [2023-08-04 02:35:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:35:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:35:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 674 transitions. [2023-08-04 02:35:17,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687763713080168 [2023-08-04 02:35:17,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 674 transitions. [2023-08-04 02:35:17,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 674 transitions. [2023-08-04 02:35:17,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:35:17,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 674 transitions. [2023-08-04 02:35:17,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:17,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:17,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:17,414 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 320 flow. Second operand 3 states and 674 transitions. [2023-08-04 02:35:17,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 534 flow [2023-08-04 02:35:17,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 528 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:35:17,441 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 326 flow [2023-08-04 02:35:17,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2023-08-04 02:35:17,444 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 2 predicate places. [2023-08-04 02:35:17,444 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 326 flow [2023-08-04 02:35:17,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:17,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:35:17,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:35:17,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 02:35:17,650 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 [2023-08-04 02:35:17,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:35:17,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:35:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1927634168, now seen corresponding path program 1 times [2023-08-04 02:35:17,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:35:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998054592] [2023-08-04 02:35:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:35:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:35:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:35:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:35:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:35:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998054592] [2023-08-04 02:35:17,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998054592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:35:17,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959882588] [2023-08-04 02:35:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:35:17,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:35:17,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:35:17,731 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) [2023-08-04 02:35:17,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 02:35:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:35:17,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:35:17,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:35:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:35:17,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:35:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959882588] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:35:17,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:35:17,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:35:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944006719] [2023-08-04 02:35:17,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:35:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:35:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:35:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:35:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:35:17,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:35:17,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:17,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:35:17,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:35:17,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:35:53,563 INFO L124 PetriNetUnfolderBase]: 452339/545170 cut-off events. [2023-08-04 02:35:53,564 INFO L125 PetriNetUnfolderBase]: For 29523/29523 co-relation queries the response was YES. [2023-08-04 02:35:56,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1099965 conditions, 545170 events. 452339/545170 cut-off events. For 29523/29523 co-relation queries the response was YES. Maximal size of possible extension queue 18805. Compared 3178135 event pairs, 151288 based on Foata normal form. 0/419951 useless extension candidates. Maximal degree in co-relation 242906. Up to 513894 conditions per place. [2023-08-04 02:35:59,542 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 95 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2023-08-04 02:35:59,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 570 flow [2023-08-04 02:35:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:35:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:35:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-04 02:35:59,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746835443037974 [2023-08-04 02:35:59,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-04 02:35:59,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-04 02:35:59,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:35:59,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-04 02:35:59,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:59,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:59,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:59,548 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 326 flow. Second operand 3 states and 681 transitions. [2023-08-04 02:35:59,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 570 flow [2023-08-04 02:35:59,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 138 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:35:59,560 INFO L231 Difference]: Finished difference. Result has 94 places, 114 transitions, 336 flow [2023-08-04 02:35:59,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=94, PETRI_TRANSITIONS=114} [2023-08-04 02:35:59,561 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2023-08-04 02:35:59,561 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 114 transitions, 336 flow [2023-08-04 02:35:59,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:59,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:35:59,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:35:59,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 02:35:59,769 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 [2023-08-04 02:35:59,770 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:35:59,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:35:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash -289396408, now seen corresponding path program 1 times [2023-08-04 02:35:59,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:35:59,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198633169] [2023-08-04 02:35:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:35:59,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:35:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:35:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:35:59,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:35:59,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198633169] [2023-08-04 02:35:59,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198633169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:35:59,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843159636] [2023-08-04 02:35:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:35:59,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:35:59,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:35:59,849 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) [2023-08-04 02:35:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 02:35:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:35:59,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:35:59,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:35:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:35:59,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:35:59,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843159636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:35:59,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:35:59,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:35:59,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369948000] [2023-08-04 02:35:59,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:35:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:35:59,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:35:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:35:59,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:35:59,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:35:59,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 114 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:35:59,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:35:59,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:35:59,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:36:29,856 INFO L124 PetriNetUnfolderBase]: 394367/478438 cut-off events. [2023-08-04 02:36:29,856 INFO L125 PetriNetUnfolderBase]: For 30473/30473 co-relation queries the response was YES. [2023-08-04 02:36:32,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973214 conditions, 478438 events. 394367/478438 cut-off events. For 30473/30473 co-relation queries the response was YES. Maximal size of possible extension queue 16907. Compared 2800143 event pairs, 143462 based on Foata normal form. 0/373573 useless extension candidates. Maximal degree in co-relation 210818. Up to 380422 conditions per place. [2023-08-04 02:36:35,197 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 106 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2023-08-04 02:36:35,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 149 transitions, 639 flow [2023-08-04 02:36:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:36:35,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:36:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-04 02:36:35,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831223628691983 [2023-08-04 02:36:35,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-04 02:36:35,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-04 02:36:35,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:36:35,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-04 02:36:35,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:36:35,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:36:35,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:36:35,205 INFO L175 Difference]: Start difference. First operand has 94 places, 114 transitions, 336 flow. Second operand 3 states and 691 transitions. [2023-08-04 02:36:35,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 149 transitions, 639 flow [2023-08-04 02:36:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 149 transitions, 637 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:36:35,249 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 346 flow [2023-08-04 02:36:35,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2023-08-04 02:36:35,250 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2023-08-04 02:36:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 346 flow [2023-08-04 02:36:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:36:35,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:36:35,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:36:35,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 02:36:35,456 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 [2023-08-04 02:36:35,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:36:35,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:36:35,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1736608919, now seen corresponding path program 1 times [2023-08-04 02:36:35,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:36:35,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992450376] [2023-08-04 02:36:35,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:36:35,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:36:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:36:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 02:36:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:36:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992450376] [2023-08-04 02:36:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992450376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:36:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965186855] [2023-08-04 02:36:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:36:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:36:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:36:35,590 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) [2023-08-04 02:36:35,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 02:36:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:36:35,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:36:35,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:36:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:36:35,704 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:36:35,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965186855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:36:35,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:36:35,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 02:36:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613145592] [2023-08-04 02:36:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:36:35,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:36:35,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:36:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:36:35,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:36:35,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:36:35,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:36:35,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:36:35,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:36:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:37:05,696 INFO L124 PetriNetUnfolderBase]: 363321/443940 cut-off events. [2023-08-04 02:37:05,696 INFO L125 PetriNetUnfolderBase]: For 43163/43163 co-relation queries the response was YES. [2023-08-04 02:37:08,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 922897 conditions, 443940 events. 363321/443940 cut-off events. For 43163/43163 co-relation queries the response was YES. Maximal size of possible extension queue 14436. Compared 2610721 event pairs, 144644 based on Foata normal form. 0/354079 useless extension candidates. Maximal degree in co-relation 197695. Up to 335606 conditions per place. [2023-08-04 02:37:10,308 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 107 selfloop transitions, 2 changer transitions 0/150 dead transitions. [2023-08-04 02:37:10,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 150 transitions, 651 flow [2023-08-04 02:37:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:37:10,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:37:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-04 02:37:10,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831223628691983 [2023-08-04 02:37:10,311 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-04 02:37:10,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-04 02:37:10,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:37:10,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-04 02:37:10,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:10,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:10,332 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:10,332 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 346 flow. Second operand 3 states and 691 transitions. [2023-08-04 02:37:10,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 150 transitions, 651 flow [2023-08-04 02:37:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 649 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:37:13,468 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 356 flow [2023-08-04 02:37:13,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2023-08-04 02:37:13,470 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2023-08-04 02:37:13,470 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 356 flow [2023-08-04 02:37:13,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:37:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:37:13,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 02:37:13,677 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 [2023-08-04 02:37:13,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:37:13,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:37:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1297424775, now seen corresponding path program 1 times [2023-08-04 02:37:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:37:13,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122318296] [2023-08-04 02:37:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:37:13,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:37:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:37:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 02:37:13,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:37:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122318296] [2023-08-04 02:37:13,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122318296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:37:13,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142345802] [2023-08-04 02:37:13,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:37:13,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:37:13,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:37:13,708 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) [2023-08-04 02:37:13,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 02:37:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:37:13,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:37:13,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:37:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:37:13,785 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:37:13,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142345802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:37:13,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:37:13,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 02:37:13,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235304362] [2023-08-04 02:37:13,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:37:13,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:37:13,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:37:13,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:37:13,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:37:13,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 395 [2023-08-04 02:37:13,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 356 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:13,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:37:13,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 395 [2023-08-04 02:37:13,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:37:46,301 INFO L124 PetriNetUnfolderBase]: 360799/441821 cut-off events. [2023-08-04 02:37:46,301 INFO L125 PetriNetUnfolderBase]: For 47765/47765 co-relation queries the response was YES. [2023-08-04 02:37:49,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929226 conditions, 441821 events. 360799/441821 cut-off events. For 47765/47765 co-relation queries the response was YES. Maximal size of possible extension queue 14019. Compared 2613277 event pairs, 165889 based on Foata normal form. 0/357047 useless extension candidates. Maximal degree in co-relation 533018. Up to 383115 conditions per place. [2023-08-04 02:37:51,639 INFO L140 encePairwiseOnDemand]: 392/395 looper letters, 108 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2023-08-04 02:37:51,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 151 transitions, 663 flow [2023-08-04 02:37:51,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:37:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:37:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 691 transitions. [2023-08-04 02:37:51,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831223628691983 [2023-08-04 02:37:51,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 691 transitions. [2023-08-04 02:37:51,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 691 transitions. [2023-08-04 02:37:51,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:37:51,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 691 transitions. [2023-08-04 02:37:51,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:51,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:51,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 395.0) internal successors, (1580), 4 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:37:51,644 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 356 flow. Second operand 3 states and 691 transitions. [2023-08-04 02:37:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 151 transitions, 663 flow [2023-08-04 02:38:12,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 151 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:38:12,182 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 366 flow [2023-08-04 02:38:12,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=395, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2023-08-04 02:38:12,184 INFO L281 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2023-08-04 02:38:12,184 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 366 flow [2023-08-04 02:38:12,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:12,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:38:12,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:38:12,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 02:38:12,389 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,SelfDestructingSolverStorable13 [2023-08-04 02:38:12,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:38:12,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:38:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 428222057, now seen corresponding path program 1 times [2023-08-04 02:38:12,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:38:12,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801739679] [2023-08-04 02:38:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:12,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:38:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:38:12,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:38:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801739679] [2023-08-04 02:38:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801739679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:38:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353624504] [2023-08-04 02:38:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:38:12,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:38:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:38:12,478 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) [2023-08-04 02:38:12,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 02:38:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:38:12,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:38:12,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:38:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:38:12,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:38:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:38:12,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353624504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:38:12,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:38:12,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 02:38:12,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071673833] [2023-08-04 02:38:12,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:38:12,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:38:12,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:38:12,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:38:12,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:38:12,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 395 [2023-08-04 02:38:12,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:38:12,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:38:12,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 395 [2023-08-04 02:38:12,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand