/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_popl20-queue-add-2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:18:19,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:18:19,166 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:18:19,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:18:19,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:18:19,170 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:18:19,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:18:19,189 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:18:19,190 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:18:19,190 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:18:19,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:18:19,191 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:18:19,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:18:19,192 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:18:19,192 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:18:19,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:18:19,193 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:18:19,193 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:18:19,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:18:19,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:18:19,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:18:19,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:18:19,194 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:18:19,195 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:18:19,195 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:18:19,195 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:18:19,196 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:18:19,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:18:19,196 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:18:19,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:18:19,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:18:19,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:18:19,198 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:18:19,198 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:18:19,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:18:19,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:18:19,199 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:18:19,199 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:18:19,199 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:18:19,199 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:18:19,200 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:18:19,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:18:19,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:18:19,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:18:19,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:18:19,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:18:19,458 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:18:19,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 03:18:20,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:18:20,903 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:18:20,905 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 03:18:20,912 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272ab1449/aede71a9f013435b9346ede72474d2a6/FLAG63967cd48 [2023-08-04 03:18:20,933 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/272ab1449/aede71a9f013435b9346ede72474d2a6 [2023-08-04 03:18:20,939 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:18:20,941 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:18:20,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:18:20,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:18:20,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:18:20,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:18:20" (1/1) ... [2023-08-04 03:18:20,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@757f1bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:20, skipping insertion in model container [2023-08-04 03:18:20,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:18:20" (1/1) ... [2023-08-04 03:18:20,975 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:18:21,162 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c[2858,2871] [2023-08-04 03:18:21,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:18:21,186 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:18:21,220 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-queue-add-2.wvr_bound2.c[2858,2871] [2023-08-04 03:18:21,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:18:21,233 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:18:21,234 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:18:21,240 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:18:21,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21 WrapperNode [2023-08-04 03:18:21,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:18:21,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:18:21,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:18:21,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:18:21,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,269 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,302 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 190 [2023-08-04 03:18:21,302 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:18:21,303 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:18:21,303 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:18:21,303 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:18:21,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,326 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,327 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,342 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,345 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,348 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:18:21,351 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:18:21,351 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:18:21,351 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:18:21,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (1/1) ... [2023-08-04 03:18:21,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:18:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:21,383 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 03:18:21,405 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 03:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:18:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:18:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:18:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:18:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:18:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:18:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:18:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:18:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:18:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:18:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:18:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:18:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:18:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:18:21,423 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 03:18:21,508 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:18:21,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:18:21,767 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:18:21,886 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:18:21,886 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:18:21,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:18:21 BoogieIcfgContainer [2023-08-04 03:18:21,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:18:21,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:18:21,890 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:18:21,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:18:21,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:18:20" (1/3) ... [2023-08-04 03:18:21,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf06cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:18:21, skipping insertion in model container [2023-08-04 03:18:21,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:18:21" (2/3) ... [2023-08-04 03:18:21,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cf06cc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:18:21, skipping insertion in model container [2023-08-04 03:18:21,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:18:21" (3/3) ... [2023-08-04 03:18:21,896 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-queue-add-2.wvr_bound2.c [2023-08-04 03:18:21,903 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:18:21,910 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:18:21,911 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:18:21,911 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:18:21,987 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:18:22,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,186 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 03:18:22,186 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:18:22,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 03:18:22,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,202 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,207 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:18:22,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 158 transitions, 338 flow [2023-08-04 03:18:22,283 INFO L124 PetriNetUnfolderBase]: 39/298 cut-off events. [2023-08-04 03:18:22,284 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:18:22,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 298 events. 39/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 863 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2023-08-04 03:18:22,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 03:18:26,519 INFO L134 LiptonReduction]: Checked pairs total: 3920 [2023-08-04 03:18:26,519 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-04 03:18:26,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:18:26,537 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;@6e50e77b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:18:26,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:18:26,542 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:18:26,542 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-08-04 03:18:26,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:18:26,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:26,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:18:26,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:18:26,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:26,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1205354699, now seen corresponding path program 1 times [2023-08-04 03:18:26,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:26,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306225997] [2023-08-04 03:18:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:26,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:18:26,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:18:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:18:26,729 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:18:26,730 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:18:26,731 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:18:26,733 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:18:26,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:18:26,734 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:18:26,736 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:18:26,736 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:18:26,737 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:18:26,766 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:18:26,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:26,870 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 03:18:26,870 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:18:26,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 03:18:26,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:26,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:26,882 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:18:26,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:26,882 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:26,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:27,012 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 03:18:27,012 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:18:27,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 03:18:27,035 INFO L119 LiptonReduction]: Number of co-enabled transitions 6392 [2023-08-04 03:18:31,390 INFO L134 LiptonReduction]: Checked pairs total: 12553 [2023-08-04 03:18:31,390 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 03:18:31,392 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:18:31,393 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;@6e50e77b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:18:31,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:18:31,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:18:31,400 INFO L124 PetriNetUnfolderBase]: 11/75 cut-off events. [2023-08-04 03:18:31,400 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:18:31,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:31,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:18:31,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:18:31,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -682477906, now seen corresponding path program 1 times [2023-08-04 03:18:31,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:31,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964371549] [2023-08-04 03:18:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:31,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:31,585 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 03:18:31,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:31,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964371549] [2023-08-04 03:18:31,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964371549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:31,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619460457] [2023-08-04 03:18:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:31,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:31,590 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 03:18:31,597 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 03:18:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:31,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:18:31,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:31,739 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 03:18:31,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619460457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:31,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:31,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:18:31,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770922364] [2023-08-04 03:18:31,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:31,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:31,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:18:31,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 352 [2023-08-04 03:18:31,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 03:18:31,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:31,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 352 [2023-08-04 03:18:31,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:33,547 INFO L124 PetriNetUnfolderBase]: 12058/16007 cut-off events. [2023-08-04 03:18:33,547 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2023-08-04 03:18:33,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32367 conditions, 16007 events. 12058/16007 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 80759 event pairs, 4472 based on Foata normal form. 0/10345 useless extension candidates. Maximal degree in co-relation 9672. Up to 15300 conditions per place. [2023-08-04 03:18:33,599 INFO L140 encePairwiseOnDemand]: 345/352 looper letters, 27 selfloop transitions, 5 changer transitions 17/56 dead transitions. [2023-08-04 03:18:33,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 250 flow [2023-08-04 03:18:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:18:33,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:18:33,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 781 transitions. [2023-08-04 03:18:33,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2023-08-04 03:18:33,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 781 transitions. [2023-08-04 03:18:33,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 781 transitions. [2023-08-04 03:18:33,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:33,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 781 transitions. [2023-08-04 03:18:33,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.2) internal successors, (781), 5 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:18:33,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 03:18:33,631 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 03:18:33,633 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 148 flow. Second operand 5 states and 781 transitions. [2023-08-04 03:18:33,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 250 flow [2023-08-04 03:18:33,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:18:33,642 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 99 flow [2023-08-04 03:18:33,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-04 03:18:33,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-04 03:18:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 99 flow [2023-08-04 03:18:33,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 03:18:33,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:33,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:33,663 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 03:18:33,855 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 03:18:33,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:18:33,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:33,856 INFO L85 PathProgramCache]: Analyzing trace with hash 634356725, now seen corresponding path program 1 times [2023-08-04 03:18:33,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:33,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473442017] [2023-08-04 03:18:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:33,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:33,950 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 03:18:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473442017] [2023-08-04 03:18:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473442017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:33,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:18:33,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:18:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990361977] [2023-08-04 03:18:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:33,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:18:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 352 [2023-08-04 03:18:33,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 03:18:33,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:33,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 352 [2023-08-04 03:18:33,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:34,347 INFO L124 PetriNetUnfolderBase]: 2645/3531 cut-off events. [2023-08-04 03:18:34,348 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 03:18:34,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 3531 events. 2645/3531 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14404 event pairs, 1275 based on Foata normal form. 1/2398 useless extension candidates. Maximal degree in co-relation 2138. Up to 3351 conditions per place. [2023-08-04 03:18:34,367 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 25 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-08-04 03:18:34,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 156 flow [2023-08-04 03:18:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 03:18:34,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2023-08-04 03:18:34,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 03:18:34,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 03:18:34,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:34,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 03:18:34,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 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 03:18:34,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 03:18:34,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 0 states have call successors, (0), 0 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 03:18:34,373 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 99 flow. Second operand 3 states and 468 transitions. [2023-08-04 03:18:34,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 156 flow [2023-08-04 03:18:34,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 153 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:34,375 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 95 flow [2023-08-04 03:18:34,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-04 03:18:34,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-04 03:18:34,376 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 95 flow [2023-08-04 03:18:34,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 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 03:18:34,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:34,377 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:34,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:18:34,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:18:34,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:34,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1960098218, now seen corresponding path program 1 times [2023-08-04 03:18:34,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:34,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564483709] [2023-08-04 03:18:34,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:34,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:34,424 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 03:18:34,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564483709] [2023-08-04 03:18:34,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564483709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:34,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088435969] [2023-08-04 03:18:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:34,427 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 03:18:34,452 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 03:18:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:34,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:18:34,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:34,541 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 03:18:34,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:34,565 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 03:18:34,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088435969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:34,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:34,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:18:34,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758148077] [2023-08-04 03:18:34,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:34,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:34,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:34,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:34,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:34,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 352 [2023-08-04 03:18:34,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:18:34,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:34,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 352 [2023-08-04 03:18:34,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:34,855 INFO L124 PetriNetUnfolderBase]: 2165/2838 cut-off events. [2023-08-04 03:18:34,855 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-04 03:18:34,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5744 conditions, 2838 events. 2165/2838 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10743 event pairs, 696 based on Foata normal form. 3/1899 useless extension candidates. Maximal degree in co-relation 4281. Up to 2670 conditions per place. [2023-08-04 03:18:34,879 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 27 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-04 03:18:34,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 166 flow [2023-08-04 03:18:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:18:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:18:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2023-08-04 03:18:34,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367897727272727 [2023-08-04 03:18:34,882 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2023-08-04 03:18:34,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2023-08-04 03:18:34,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:34,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2023-08-04 03:18:34,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 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 03:18:34,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 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 03:18:34,887 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 352.0) internal successors, (1760), 5 states have internal predecessors, (1760), 0 states have call successors, (0), 0 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 03:18:34,887 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 95 flow. Second operand 4 states and 615 transitions. [2023-08-04 03:18:34,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 166 flow [2023-08-04 03:18:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:18:34,889 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 92 flow [2023-08-04 03:18:34,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-04 03:18:34,890 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2023-08-04 03:18:34,890 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 92 flow [2023-08-04 03:18:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:18:34,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:34,891 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:34,897 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 03:18:35,097 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 03:18:35,098 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:18:35,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1611315670, now seen corresponding path program 1 times [2023-08-04 03:18:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:35,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954627525] [2023-08-04 03:18:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:35,213 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 03:18:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954627525] [2023-08-04 03:18:35,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954627525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905660131] [2023-08-04 03:18:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:35,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:35,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:35,216 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 03:18:35,219 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 03:18:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:35,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:18:35,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:35,324 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 03:18:35,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905660131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:35,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:18:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574881497] [2023-08-04 03:18:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:35,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:18:35,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 352 [2023-08-04 03:18:35,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:18:35,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:35,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 352 [2023-08-04 03:18:35,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:35,606 INFO L124 PetriNetUnfolderBase]: 1535/2019 cut-off events. [2023-08-04 03:18:35,606 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-04 03:18:35,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 2019 events. 1535/2019 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7110 event pairs, 52 based on Foata normal form. 144/1464 useless extension candidates. Maximal degree in co-relation 1528. Up to 909 conditions per place. [2023-08-04 03:18:35,609 INFO L140 encePairwiseOnDemand]: 349/352 looper letters, 0 selfloop transitions, 0 changer transitions 52/52 dead transitions. [2023-08-04 03:18:35,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 226 flow [2023-08-04 03:18:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:18:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:18:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 776 transitions. [2023-08-04 03:18:35,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2023-08-04 03:18:35,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 776 transitions. [2023-08-04 03:18:35,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 776 transitions. [2023-08-04 03:18:35,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:35,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 776 transitions. [2023-08-04 03:18:35,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.2) internal successors, (776), 5 states have internal predecessors, (776), 0 states have call successors, (0), 0 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 03:18:35,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 03:18:35,618 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 352.0) internal successors, (2112), 6 states have internal predecessors, (2112), 0 states have call successors, (0), 0 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 03:18:35,618 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 92 flow. Second operand 5 states and 776 transitions. [2023-08-04 03:18:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 226 flow [2023-08-04 03:18:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 52 transitions, 219 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:18:35,620 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-04 03:18:35,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-04 03:18:35,620 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-04 03:18:35,621 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-04 03:18:35,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:18:35,621 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:18:35,622 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:18:35,628 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 03:18:35,828 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 03:18:35,828 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:18:35,829 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:18:35,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,893 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 03:18:35,893 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:18:35,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 03:18:35,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,900 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,901 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:18:35,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,901 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 418 flow [2023-08-04 03:18:35,962 INFO L124 PetriNetUnfolderBase]: 144/874 cut-off events. [2023-08-04 03:18:35,962 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:18:35,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 874 events. 144/874 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4230 event pairs, 2 based on Foata normal form. 0/727 useless extension candidates. Maximal degree in co-relation 531. Up to 32 conditions per place. [2023-08-04 03:18:35,978 INFO L119 LiptonReduction]: Number of co-enabled transitions 6392 [2023-08-04 03:18:40,166 INFO L134 LiptonReduction]: Checked pairs total: 11720 [2023-08-04 03:18:40,166 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-04 03:18:40,168 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:18:40,169 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;@6e50e77b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:18:40,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:18:40,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:18:40,171 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-04 03:18:40,171 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:18:40,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:40,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:18:40,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:40,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1628063730, now seen corresponding path program 1 times [2023-08-04 03:18:40,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:40,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75066554] [2023-08-04 03:18:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:40,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:40,199 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 03:18:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:40,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75066554] [2023-08-04 03:18:40,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75066554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:40,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:18:40,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:18:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593580606] [2023-08-04 03:18:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:40,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:18:40,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-04 03:18:40,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 50 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 03:18:40,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:40,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-04 03:18:40,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:41,532 INFO L124 PetriNetUnfolderBase]: 11997/15785 cut-off events. [2023-08-04 03:18:41,532 INFO L125 PetriNetUnfolderBase]: For 1536/1536 co-relation queries the response was YES. [2023-08-04 03:18:41,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32026 conditions, 15785 events. 11997/15785 cut-off events. For 1536/1536 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 77296 event pairs, 6048 based on Foata normal form. 0/10167 useless extension candidates. Maximal degree in co-relation 9640. Up to 15230 conditions per place. [2023-08-04 03:18:41,597 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 39 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 03:18:41,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 232 flow [2023-08-04 03:18:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-04 03:18:41,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46418338108882523 [2023-08-04 03:18:41,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-04 03:18:41,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-04 03:18:41,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:41,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-04 03:18:41,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 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 03:18:41,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:41,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:41,603 INFO L175 Difference]: Start difference. First operand has 44 places, 50 transitions, 148 flow. Second operand 3 states and 486 transitions. [2023-08-04 03:18:41,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 232 flow [2023-08-04 03:18:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:18:41,607 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 142 flow [2023-08-04 03:18:41,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-04 03:18:41,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 03:18:41,609 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 142 flow [2023-08-04 03:18:41,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 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 03:18:41,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:41,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:41,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:18:41,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:41,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:41,611 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527481, now seen corresponding path program 1 times [2023-08-04 03:18:41,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:41,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290880154] [2023-08-04 03:18:41,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:41,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:41,658 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 03:18:41,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290880154] [2023-08-04 03:18:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290880154] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577563881] [2023-08-04 03:18:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:41,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:41,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:41,663 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 03:18:41,666 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 03:18:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:41,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:18:41,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:41,740 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 03:18:41,740 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:41,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577563881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:41,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:41,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:18:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90195849] [2023-08-04 03:18:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:41,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-04 03:18:41,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 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 03:18:41,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:41,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-04 03:18:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:42,770 INFO L124 PetriNetUnfolderBase]: 12017/15844 cut-off events. [2023-08-04 03:18:42,771 INFO L125 PetriNetUnfolderBase]: For 1385/1385 co-relation queries the response was YES. [2023-08-04 03:18:42,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32034 conditions, 15844 events. 12017/15844 cut-off events. For 1385/1385 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 78488 event pairs, 5554 based on Foata normal form. 0/10208 useless extension candidates. Maximal degree in co-relation 19591. Up to 15049 conditions per place. [2023-08-04 03:18:42,848 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 03:18:42,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 254 flow [2023-08-04 03:18:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-04 03:18:42,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46609360076408785 [2023-08-04 03:18:42,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-04 03:18:42,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-04 03:18:42,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:42,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-04 03:18:42,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 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 03:18:42,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:42,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:42,854 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 142 flow. Second operand 3 states and 488 transitions. [2023-08-04 03:18:42,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 254 flow [2023-08-04 03:18:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:18:42,860 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 146 flow [2023-08-04 03:18:42,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2023-08-04 03:18:42,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 03:18:42,861 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 146 flow [2023-08-04 03:18:42,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 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 03:18:42,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:42,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:42,869 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 03:18:43,067 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 03:18:43,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:43,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2109473754, now seen corresponding path program 1 times [2023-08-04 03:18:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:43,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604155217] [2023-08-04 03:18:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:43,109 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 03:18:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:43,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604155217] [2023-08-04 03:18:43,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604155217] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:43,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280917733] [2023-08-04 03:18:43,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:43,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:43,112 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 03:18:43,115 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 03:18:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:43,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:18:43,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:43,194 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 03:18:43,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:43,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280917733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:43,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:43,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:18:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989747940] [2023-08-04 03:18:43,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:43,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:43,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:43,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:43,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-04 03:18:43,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 03:18:43,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:43,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-04 03:18:43,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:44,086 INFO L124 PetriNetUnfolderBase]: 9989/13414 cut-off events. [2023-08-04 03:18:44,087 INFO L125 PetriNetUnfolderBase]: For 866/866 co-relation queries the response was YES. [2023-08-04 03:18:44,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27570 conditions, 13414 events. 9989/13414 cut-off events. For 866/866 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 67583 event pairs, 4120 based on Foata normal form. 0/9071 useless extension candidates. Maximal degree in co-relation 9363. Up to 9443 conditions per place. [2023-08-04 03:18:44,139 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-04 03:18:44,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 63 transitions, 298 flow [2023-08-04 03:18:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 03:18:44,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47277936962750716 [2023-08-04 03:18:44,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 03:18:44,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 03:18:44,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:44,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 03:18:44,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 03:18:44,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:44,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:44,145 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 146 flow. Second operand 3 states and 495 transitions. [2023-08-04 03:18:44,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 63 transitions, 298 flow [2023-08-04 03:18:44,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:44,148 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 156 flow [2023-08-04 03:18:44,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-08-04 03:18:44,148 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-04 03:18:44,149 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 156 flow [2023-08-04 03:18:44,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 03:18:44,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:44,149 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] [2023-08-04 03:18:44,155 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 03:18:44,354 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 03:18:44,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:44,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -337269876, now seen corresponding path program 1 times [2023-08-04 03:18:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:44,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085540265] [2023-08-04 03:18:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:44,411 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 03:18:44,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:44,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085540265] [2023-08-04 03:18:44,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085540265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:44,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276153456] [2023-08-04 03:18:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:44,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:44,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:44,417 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 03:18:44,419 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 03:18:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:44,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:18:44,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:44,496 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 03:18:44,496 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:44,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276153456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:44,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:44,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:18:44,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478148503] [2023-08-04 03:18:44,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:44,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:18:44,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:44,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:18:44,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:44,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-04 03:18:44,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 03:18:44,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:44,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-04 03:18:44,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:45,396 INFO L124 PetriNetUnfolderBase]: 9747/13178 cut-off events. [2023-08-04 03:18:45,396 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 03:18:45,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28176 conditions, 13178 events. 9747/13178 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 65743 event pairs, 4688 based on Foata normal form. 0/9307 useless extension candidates. Maximal degree in co-relation 9971. Up to 10244 conditions per place. [2023-08-04 03:18:45,443 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 54 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 03:18:45,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 310 flow [2023-08-04 03:18:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:18:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:18:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 03:18:45,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47277936962750716 [2023-08-04 03:18:45,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 03:18:45,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 03:18:45,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:45,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 03:18:45,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 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 03:18:45,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:45,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 03:18:45,449 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 156 flow. Second operand 3 states and 495 transitions. [2023-08-04 03:18:45,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 310 flow [2023-08-04 03:18:45,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:45,459 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 166 flow [2023-08-04 03:18:45,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2023-08-04 03:18:45,460 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 03:18:45,460 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 166 flow [2023-08-04 03:18:45,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 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 03:18:45,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:45,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:45,469 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 03:18:45,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:45,669 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:45,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1457469833, now seen corresponding path program 1 times [2023-08-04 03:18:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:45,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749181841] [2023-08-04 03:18:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:45,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:45,736 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 03:18:45,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749181841] [2023-08-04 03:18:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749181841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:45,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941693241] [2023-08-04 03:18:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:45,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:45,738 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 03:18:45,741 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 03:18:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:45,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 03:18:45,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:18:45,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:18:45,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941693241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:18:45,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:18:45,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 03:18:45,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397139930] [2023-08-04 03:18:45,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:18:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:18:45,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:18:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:18:45,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2023-08-04 03:18:45,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 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 03:18:45,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:45,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2023-08-04 03:18:45,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:46,789 INFO L124 PetriNetUnfolderBase]: 9747/13223 cut-off events. [2023-08-04 03:18:46,789 INFO L125 PetriNetUnfolderBase]: For 2291/2291 co-relation queries the response was YES. [2023-08-04 03:18:46,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28585 conditions, 13223 events. 9747/13223 cut-off events. For 2291/2291 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 66192 event pairs, 5761 based on Foata normal form. 75/9515 useless extension candidates. Maximal degree in co-relation 20808. Up to 12668 conditions per place. [2023-08-04 03:18:46,833 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 40 selfloop transitions, 2 changer transitions 14/64 dead transitions. [2023-08-04 03:18:46,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 340 flow [2023-08-04 03:18:46,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:18:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:18:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-04 03:18:46,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45558739255014324 [2023-08-04 03:18:46,835 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-04 03:18:46,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-04 03:18:46,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:46,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-04 03:18:46,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 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 03:18:46,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:46,839 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:46,839 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 166 flow. Second operand 4 states and 636 transitions. [2023-08-04 03:18:46,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 340 flow [2023-08-04 03:18:46,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:46,869 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 188 flow [2023-08-04 03:18:46,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-04 03:18:46,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2023-08-04 03:18:46,870 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 188 flow [2023-08-04 03:18:46,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 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 03:18:46,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:46,870 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] [2023-08-04 03:18:46,877 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 03:18:47,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:47,071 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:47,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:47,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2105145653, now seen corresponding path program 1 times [2023-08-04 03:18:47,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:47,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457367395] [2023-08-04 03:18:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:47,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:47,129 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 03:18:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457367395] [2023-08-04 03:18:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457367395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086902879] [2023-08-04 03:18:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:47,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:47,132 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 03:18:47,160 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 03:18:47,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:47,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:18:47,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:47,242 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 03:18:47,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:47,259 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 03:18:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086902879] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:47,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:47,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:18:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7941546] [2023-08-04 03:18:47,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:47,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:47,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:47,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:47,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 349 [2023-08-04 03:18:47,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 03:18:47,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:47,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 349 [2023-08-04 03:18:47,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:48,062 INFO L124 PetriNetUnfolderBase]: 8756/11779 cut-off events. [2023-08-04 03:18:48,063 INFO L125 PetriNetUnfolderBase]: For 5377/5377 co-relation queries the response was YES. [2023-08-04 03:18:48,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32132 conditions, 11779 events. 8756/11779 cut-off events. For 5377/5377 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 56999 event pairs, 3340 based on Foata normal form. 3/8330 useless extension candidates. Maximal degree in co-relation 32112. Up to 11278 conditions per place. [2023-08-04 03:18:48,119 INFO L140 encePairwiseOnDemand]: 345/349 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 03:18:48,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 316 flow [2023-08-04 03:18:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:18:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:18:48,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 631 transitions. [2023-08-04 03:18:48,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4520057306590258 [2023-08-04 03:18:48,122 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 631 transitions. [2023-08-04 03:18:48,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 631 transitions. [2023-08-04 03:18:48,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:48,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 631 transitions. [2023-08-04 03:18:48,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 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 03:18:48,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:48,126 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:48,126 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 188 flow. Second operand 4 states and 631 transitions. [2023-08-04 03:18:48,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 316 flow [2023-08-04 03:18:48,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 312 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:18:48,143 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 198 flow [2023-08-04 03:18:48,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 03:18:48,144 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-08-04 03:18:48,144 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 198 flow [2023-08-04 03:18:48,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 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 03:18:48,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:48,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:48,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 03:18:48,350 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,SelfDestructingSolverStorable10 [2023-08-04 03:18:48,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:48,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1958353413, now seen corresponding path program 1 times [2023-08-04 03:18:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:48,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354563697] [2023-08-04 03:18:48,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:48,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 03:18:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354563697] [2023-08-04 03:18:48,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354563697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:48,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463358153] [2023-08-04 03:18:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:48,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:48,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:48,403 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 03:18:48,430 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 03:18:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:48,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 03:18:48,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:18:48,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 03:18:48,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463358153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:48,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:48,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-04 03:18:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312959314] [2023-08-04 03:18:48,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:48,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 03:18:48,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:48,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 03:18:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-04 03:18:48,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 349 [2023-08-04 03:18:48,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 198 flow. Second operand has 11 states, 11 states have (on average 140.1818181818182) internal successors, (1542), 11 states have internal predecessors, (1542), 0 states have call successors, (0), 0 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 03:18:48,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:48,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 349 [2023-08-04 03:18:48,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:49,887 INFO L124 PetriNetUnfolderBase]: 9910/14045 cut-off events. [2023-08-04 03:18:49,887 INFO L125 PetriNetUnfolderBase]: For 7426/7426 co-relation queries the response was YES. [2023-08-04 03:18:49,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37737 conditions, 14045 events. 9910/14045 cut-off events. For 7426/7426 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 77602 event pairs, 3052 based on Foata normal form. 1483/11877 useless extension candidates. Maximal degree in co-relation 30802. Up to 8982 conditions per place. [2023-08-04 03:18:49,952 INFO L140 encePairwiseOnDemand]: 336/349 looper letters, 106 selfloop transitions, 30 changer transitions 3/147 dead transitions. [2023-08-04 03:18:49,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 147 transitions, 858 flow [2023-08-04 03:18:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 03:18:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 03:18:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1779 transitions. [2023-08-04 03:18:49,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42478510028653294 [2023-08-04 03:18:49,957 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1779 transitions. [2023-08-04 03:18:49,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1779 transitions. [2023-08-04 03:18:49,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:49,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1779 transitions. [2023-08-04 03:18:49,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 148.25) internal successors, (1779), 12 states have internal predecessors, (1779), 0 states have call successors, (0), 0 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 03:18:49,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 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 03:18:49,969 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 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 03:18:49,969 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 198 flow. Second operand 12 states and 1779 transitions. [2023-08-04 03:18:49,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 147 transitions, 858 flow [2023-08-04 03:18:50,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 147 transitions, 835 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-04 03:18:50,009 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 490 flow [2023-08-04 03:18:50,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=490, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2023-08-04 03:18:50,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2023-08-04 03:18:50,010 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 490 flow [2023-08-04 03:18:50,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 140.1818181818182) internal successors, (1542), 11 states have internal predecessors, (1542), 0 states have call successors, (0), 0 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 03:18:50,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:50,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:50,019 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 03:18:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:50,216 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:50,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1272486781, now seen corresponding path program 1 times [2023-08-04 03:18:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963625321] [2023-08-04 03:18:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:50,271 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 03:18:50,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:50,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963625321] [2023-08-04 03:18:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963625321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:50,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274401987] [2023-08-04 03:18:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:50,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:50,273 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 03:18:50,276 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 03:18:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:50,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:18:50,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:50,379 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 03:18:50,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:50,395 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 03:18:50,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274401987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:50,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:50,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:18:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632390412] [2023-08-04 03:18:50,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:50,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:50,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:50,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 349 [2023-08-04 03:18:50,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 490 flow. Second operand has 5 states, 5 states have (on average 152.2) internal successors, (761), 5 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 03:18:50,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:50,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 349 [2023-08-04 03:18:50,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:51,314 INFO L124 PetriNetUnfolderBase]: 6762/9704 cut-off events. [2023-08-04 03:18:51,314 INFO L125 PetriNetUnfolderBase]: For 57864/57864 co-relation queries the response was YES. [2023-08-04 03:18:51,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51213 conditions, 9704 events. 6762/9704 cut-off events. For 57864/57864 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 50914 event pairs, 1377 based on Foata normal form. 240/7393 useless extension candidates. Maximal degree in co-relation 47299. Up to 5216 conditions per place. [2023-08-04 03:18:51,378 INFO L140 encePairwiseOnDemand]: 345/349 looper letters, 80 selfloop transitions, 4 changer transitions 15/107 dead transitions. [2023-08-04 03:18:51,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 937 flow [2023-08-04 03:18:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:18:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:18:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-04 03:18:51,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648997134670487 [2023-08-04 03:18:51,380 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-04 03:18:51,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-04 03:18:51,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:51,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-04 03:18:51,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 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 03:18:51,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:51,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:51,385 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 490 flow. Second operand 4 states and 649 transitions. [2023-08-04 03:18:51,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 937 flow [2023-08-04 03:18:51,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 107 transitions, 867 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-04 03:18:51,410 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 387 flow [2023-08-04 03:18:51,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=387, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-08-04 03:18:51,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2023-08-04 03:18:51,411 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 387 flow [2023-08-04 03:18:51,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.2) internal successors, (761), 5 states have internal predecessors, (761), 0 states have call successors, (0), 0 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 03:18:51,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:51,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:51,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 03:18:51,617 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,SelfDestructingSolverStorable12 [2023-08-04 03:18:51,617 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:51,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 590797722, now seen corresponding path program 1 times [2023-08-04 03:18:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:51,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020921465] [2023-08-04 03:18:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:18:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:51,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020921465] [2023-08-04 03:18:51,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020921465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:51,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880102739] [2023-08-04 03:18:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:51,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:51,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:51,702 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 03:18:51,729 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 03:18:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:51,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:18:51,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:51,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:18:51,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:18:51,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880102739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:51,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:51,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:18:51,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496677319] [2023-08-04 03:18:51,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:51,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:18:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:51,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:18:51,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:18:51,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 349 [2023-08-04 03:18:51,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 03:18:51,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:51,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 349 [2023-08-04 03:18:51,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:52,644 INFO L124 PetriNetUnfolderBase]: 6297/8863 cut-off events. [2023-08-04 03:18:52,644 INFO L125 PetriNetUnfolderBase]: For 58817/58817 co-relation queries the response was YES. [2023-08-04 03:18:52,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 8863 events. 6297/8863 cut-off events. For 58817/58817 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 43812 event pairs, 3539 based on Foata normal form. 17/6480 useless extension candidates. Maximal degree in co-relation 45481. Up to 7639 conditions per place. [2023-08-04 03:18:52,708 INFO L140 encePairwiseOnDemand]: 345/349 looper letters, 65 selfloop transitions, 3 changer transitions 15/91 dead transitions. [2023-08-04 03:18:52,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 753 flow [2023-08-04 03:18:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:18:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:18:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-04 03:18:52,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4648997134670487 [2023-08-04 03:18:52,710 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-04 03:18:52,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-04 03:18:52,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:52,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-04 03:18:52,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 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 03:18:52,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:52,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 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 03:18:52,717 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 387 flow. Second operand 4 states and 649 transitions. [2023-08-04 03:18:52,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 753 flow [2023-08-04 03:18:52,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 91 transitions, 713 flow, removed 19 selfloop flow, removed 2 redundant places. [2023-08-04 03:18:52,757 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 286 flow [2023-08-04 03:18:52,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 03:18:52,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2023-08-04 03:18:52,758 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 286 flow [2023-08-04 03:18:52,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 03:18:52,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:52,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:52,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 03:18:52,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 03:18:52,961 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:52,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash -837305985, now seen corresponding path program 1 times [2023-08-04 03:18:52,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:52,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31396643] [2023-08-04 03:18:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:52,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:18:53,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:53,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31396643] [2023-08-04 03:18:53,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31396643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:53,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005599207] [2023-08-04 03:18:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:53,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:53,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:18:53,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 03:18:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:53,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-04 03:18:53,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:18:53,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:53,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:18:53,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005599207] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:53,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:53,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-04 03:18:53,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48148161] [2023-08-04 03:18:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:53,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 03:18:53,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:53,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 03:18:53,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-08-04 03:18:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2023-08-04 03:18:53,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 149.23076923076923) internal successors, (1940), 13 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 03:18:53,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:53,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2023-08-04 03:18:53,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:18:55,315 INFO L124 PetriNetUnfolderBase]: 10552/14164 cut-off events. [2023-08-04 03:18:55,315 INFO L125 PetriNetUnfolderBase]: For 59992/59992 co-relation queries the response was YES. [2023-08-04 03:18:55,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69724 conditions, 14164 events. 10552/14164 cut-off events. For 59992/59992 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 72041 event pairs, 2011 based on Foata normal form. 1/10145 useless extension candidates. Maximal degree in co-relation 69681. Up to 7317 conditions per place. [2023-08-04 03:18:55,417 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 131 selfloop transitions, 11 changer transitions 1/150 dead transitions. [2023-08-04 03:18:55,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 150 transitions, 1189 flow [2023-08-04 03:18:55,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 03:18:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 03:18:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2023-08-04 03:18:55,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680038204393505 [2023-08-04 03:18:55,420 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2023-08-04 03:18:55,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2023-08-04 03:18:55,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:18:55,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2023-08-04 03:18:55,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 03:18:55,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 03:18:55,425 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 03:18:55,425 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 286 flow. Second operand 6 states and 980 transitions. [2023-08-04 03:18:55,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 150 transitions, 1189 flow [2023-08-04 03:18:55,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 150 transitions, 1015 flow, removed 71 selfloop flow, removed 8 redundant places. [2023-08-04 03:18:55,592 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 309 flow [2023-08-04 03:18:55,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-08-04 03:18:55,593 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2023-08-04 03:18:55,593 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 309 flow [2023-08-04 03:18:55,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 149.23076923076923) internal successors, (1940), 13 states have internal predecessors, (1940), 0 states have call successors, (0), 0 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 03:18:55,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:18:55,594 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:18:55,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 03:18:55,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 03:18:55,800 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:18:55,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:18:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1415683059, now seen corresponding path program 1 times [2023-08-04 03:18:55,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:18:55,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588979588] [2023-08-04 03:18:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:18:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:18:55,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:18:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588979588] [2023-08-04 03:18:55,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588979588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:18:55,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861507663] [2023-08-04 03:18:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:18:55,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:18:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:18:55,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:18:55,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 03:18:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:18:56,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 03:18:56,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:18:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:18:56,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:18:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:18:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861507663] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:18:56,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:18:56,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-08-04 03:18:56,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159960183] [2023-08-04 03:18:56,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:18:56,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 03:18:56,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:18:56,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 03:18:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-08-04 03:18:56,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 349 [2023-08-04 03:18:56,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 309 flow. Second operand has 16 states, 16 states have (on average 136.5625) internal successors, (2185), 16 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 03:18:56,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:18:56,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 349 [2023-08-04 03:18:56,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:00,254 INFO L124 PetriNetUnfolderBase]: 30338/42726 cut-off events. [2023-08-04 03:19:00,254 INFO L125 PetriNetUnfolderBase]: For 73536/73568 co-relation queries the response was YES. [2023-08-04 03:19:00,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150455 conditions, 42726 events. 30338/42726 cut-off events. For 73536/73568 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 270155 event pairs, 5289 based on Foata normal form. 3053/41728 useless extension candidates. Maximal degree in co-relation 149075. Up to 17571 conditions per place. [2023-08-04 03:19:00,492 INFO L140 encePairwiseOnDemand]: 338/349 looper letters, 271 selfloop transitions, 20 changer transitions 165/462 dead transitions. [2023-08-04 03:19:00,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 462 transitions, 3351 flow [2023-08-04 03:19:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-04 03:19:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-04 03:19:00,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2792 transitions. [2023-08-04 03:19:00,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 03:19:00,498 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2792 transitions. [2023-08-04 03:19:00,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2792 transitions. [2023-08-04 03:19:00,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:00,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2792 transitions. [2023-08-04 03:19:00,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.11111111111111) internal successors, (2792), 18 states have internal predecessors, (2792), 0 states have call successors, (0), 0 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 03:19:00,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 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 03:19:00,512 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 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 03:19:00,512 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 309 flow. Second operand 18 states and 2792 transitions. [2023-08-04 03:19:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 462 transitions, 3351 flow [2023-08-04 03:19:00,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 462 transitions, 3342 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:00,864 INFO L231 Difference]: Finished difference. Result has 101 places, 74 transitions, 562 flow [2023-08-04 03:19:00,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=562, PETRI_PLACES=101, PETRI_TRANSITIONS=74} [2023-08-04 03:19:00,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2023-08-04 03:19:00,864 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 74 transitions, 562 flow [2023-08-04 03:19:00,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.5625) internal successors, (2185), 16 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 03:19:00,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:00,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:00,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 03:19:01,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 03:19:01,065 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:01,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:01,066 INFO L85 PathProgramCache]: Analyzing trace with hash 745132615, now seen corresponding path program 2 times [2023-08-04 03:19:01,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:01,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694636363] [2023-08-04 03:19:01,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:19:01,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:01,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694636363] [2023-08-04 03:19:01,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694636363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:01,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:01,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 03:19:01,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994969620] [2023-08-04 03:19:01,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:01,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:01,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:01,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:01,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:01,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 349 [2023-08-04 03:19:01,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 74 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 149.8) internal successors, (749), 5 states have internal predecessors, (749), 0 states have call successors, (0), 0 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 03:19:01,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:01,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 349 [2023-08-04 03:19:01,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:06,066 INFO L124 PetriNetUnfolderBase]: 31184/44694 cut-off events. [2023-08-04 03:19:06,066 INFO L125 PetriNetUnfolderBase]: For 459399/459399 co-relation queries the response was YES. [2023-08-04 03:19:06,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252848 conditions, 44694 events. 31184/44694 cut-off events. For 459399/459399 co-relation queries the response was YES. Maximal size of possible extension queue 1248. Compared 288535 event pairs, 9656 based on Foata normal form. 302/42783 useless extension candidates. Maximal degree in co-relation 249562. Up to 18912 conditions per place. [2023-08-04 03:19:06,458 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 180 selfloop transitions, 12 changer transitions 0/198 dead transitions. [2023-08-04 03:19:06,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 198 transitions, 1822 flow [2023-08-04 03:19:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:19:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:19:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-08-04 03:19:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4825214899713467 [2023-08-04 03:19:06,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-08-04 03:19:06,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-08-04 03:19:06,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:06,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-08-04 03:19:06,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 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 03:19:06,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:06,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:06,465 INFO L175 Difference]: Start difference. First operand has 101 places, 74 transitions, 562 flow. Second operand 5 states and 842 transitions. [2023-08-04 03:19:06,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 198 transitions, 1822 flow [2023-08-04 03:19:07,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 198 transitions, 1719 flow, removed 48 selfloop flow, removed 7 redundant places. [2023-08-04 03:19:07,375 INFO L231 Difference]: Finished difference. Result has 96 places, 78 transitions, 617 flow [2023-08-04 03:19:07,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=96, PETRI_TRANSITIONS=78} [2023-08-04 03:19:07,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2023-08-04 03:19:07,376 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 78 transitions, 617 flow [2023-08-04 03:19:07,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 149.8) internal successors, (749), 5 states have internal predecessors, (749), 0 states have call successors, (0), 0 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 03:19:07,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:07,376 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 03:19:07,376 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:07,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1239876161, now seen corresponding path program 3 times [2023-08-04 03:19:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377232408] [2023-08-04 03:19:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:07,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 03:19:07,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:07,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377232408] [2023-08-04 03:19:07,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377232408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:07,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574908973] [2023-08-04 03:19:07,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 03:19:07,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:07,476 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:19:07,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 03:19:07,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 03:19:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:19:07,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:19:07,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 03:19:07,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 03:19:07,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574908973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:07,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:07,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 03:19:07,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372601972] [2023-08-04 03:19:07,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 03:19:07,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:07,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 03:19:07,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-04 03:19:07,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-04 03:19:07,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 78 transitions, 617 flow. Second operand has 10 states, 10 states have (on average 147.9) internal successors, (1479), 10 states have internal predecessors, (1479), 0 states have call successors, (0), 0 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 03:19:07,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:07,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-04 03:19:07,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:14,483 INFO L124 PetriNetUnfolderBase]: 42745/60846 cut-off events. [2023-08-04 03:19:14,483 INFO L125 PetriNetUnfolderBase]: For 479447/479455 co-relation queries the response was YES. [2023-08-04 03:19:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318877 conditions, 60846 events. 42745/60846 cut-off events. For 479447/479455 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 409549 event pairs, 10634 based on Foata normal form. 478/60191 useless extension candidates. Maximal degree in co-relation 314438. Up to 26781 conditions per place. [2023-08-04 03:19:15,038 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 269 selfloop transitions, 18 changer transitions 0/293 dead transitions. [2023-08-04 03:19:15,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 293 transitions, 2674 flow [2023-08-04 03:19:15,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 03:19:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 03:19:15,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1346 transitions. [2023-08-04 03:19:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4820916905444126 [2023-08-04 03:19:15,044 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1346 transitions. [2023-08-04 03:19:15,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1346 transitions. [2023-08-04 03:19:15,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:15,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1346 transitions. [2023-08-04 03:19:15,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 168.25) internal successors, (1346), 8 states have internal predecessors, (1346), 0 states have call successors, (0), 0 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 03:19:15,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 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 03:19:15,050 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 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 03:19:15,051 INFO L175 Difference]: Start difference. First operand has 96 places, 78 transitions, 617 flow. Second operand 8 states and 1346 transitions. [2023-08-04 03:19:15,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 293 transitions, 2674 flow [2023-08-04 03:19:15,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 293 transitions, 2642 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:15,833 INFO L231 Difference]: Finished difference. Result has 106 places, 85 transitions, 772 flow [2023-08-04 03:19:15,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=772, PETRI_PLACES=106, PETRI_TRANSITIONS=85} [2023-08-04 03:19:15,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2023-08-04 03:19:15,834 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 85 transitions, 772 flow [2023-08-04 03:19:15,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 147.9) internal successors, (1479), 10 states have internal predecessors, (1479), 0 states have call successors, (0), 0 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 03:19:15,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:15,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:15,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 03:19:16,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:16,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:16,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:16,035 INFO L85 PathProgramCache]: Analyzing trace with hash 801075330, now seen corresponding path program 1 times [2023-08-04 03:19:16,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:16,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135868041] [2023-08-04 03:19:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:16,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-08-04 03:19:16,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:16,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135868041] [2023-08-04 03:19:16,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135868041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:16,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:16,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 03:19:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036501691] [2023-08-04 03:19:16,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:16,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 03:19:16,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 03:19:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:19:16,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-04 03:19:16,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 85 transitions, 772 flow. Second operand has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 03:19:16,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:16,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-04 03:19:16,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:28,963 INFO L124 PetriNetUnfolderBase]: 75104/106964 cut-off events. [2023-08-04 03:19:28,964 INFO L125 PetriNetUnfolderBase]: For 1145306/1154696 co-relation queries the response was YES. [2023-08-04 03:19:29,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 604807 conditions, 106964 events. 75104/106964 cut-off events. For 1145306/1154696 co-relation queries the response was YES. Maximal size of possible extension queue 3042. Compared 767715 event pairs, 13429 based on Foata normal form. 12996/115535 useless extension candidates. Maximal degree in co-relation 597130. Up to 52004 conditions per place. [2023-08-04 03:19:30,238 INFO L140 encePairwiseOnDemand]: 342/349 looper letters, 169 selfloop transitions, 49 changer transitions 14/243 dead transitions. [2023-08-04 03:19:30,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 243 transitions, 2573 flow [2023-08-04 03:19:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:19:30,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:19:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 871 transitions. [2023-08-04 03:19:30,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4991404011461318 [2023-08-04 03:19:30,240 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 871 transitions. [2023-08-04 03:19:30,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 871 transitions. [2023-08-04 03:19:30,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:30,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 871 transitions. [2023-08-04 03:19:30,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.2) internal successors, (871), 5 states have internal predecessors, (871), 0 states have call successors, (0), 0 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 03:19:30,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:30,243 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:30,243 INFO L175 Difference]: Start difference. First operand has 106 places, 85 transitions, 772 flow. Second operand 5 states and 871 transitions. [2023-08-04 03:19:30,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 243 transitions, 2573 flow [2023-08-04 03:19:32,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 243 transitions, 2513 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-04 03:19:32,018 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 1435 flow [2023-08-04 03:19:32,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1435, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2023-08-04 03:19:32,019 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2023-08-04 03:19:32,019 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 1435 flow [2023-08-04 03:19:32,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 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 03:19:32,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:32,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:32,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 03:19:32,020 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:32,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1773423667, now seen corresponding path program 4 times [2023-08-04 03:19:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820698227] [2023-08-04 03:19:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:19:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820698227] [2023-08-04 03:19:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820698227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355432980] [2023-08-04 03:19:32,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 03:19:32,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:32,122 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:19:32,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 03:19:32,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 03:19:32,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:19:32,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:19:32,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:19:32,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:19:32,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355432980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:32,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:32,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 03:19:32,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142096168] [2023-08-04 03:19:32,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:32,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 03:19:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 03:19:32,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-04 03:19:32,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-04 03:19:32,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 1435 flow. Second operand has 10 states, 10 states have (on average 148.4) internal successors, (1484), 10 states have internal predecessors, (1484), 0 states have call successors, (0), 0 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 03:19:32,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:32,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-04 03:19:32,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:44,843 INFO L124 PetriNetUnfolderBase]: 75214/107654 cut-off events. [2023-08-04 03:19:44,844 INFO L125 PetriNetUnfolderBase]: For 1348851/1348861 co-relation queries the response was YES. [2023-08-04 03:19:45,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627923 conditions, 107654 events. 75214/107654 cut-off events. For 1348851/1348861 co-relation queries the response was YES. Maximal size of possible extension queue 2982. Compared 763381 event pairs, 28706 based on Foata normal form. 1793/105312 useless extension candidates. Maximal degree in co-relation 627858. Up to 56245 conditions per place. [2023-08-04 03:19:46,188 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 208 selfloop transitions, 28 changer transitions 15/257 dead transitions. [2023-08-04 03:19:46,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 257 transitions, 3109 flow [2023-08-04 03:19:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:19:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:19:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 837 transitions. [2023-08-04 03:19:46,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796561604584527 [2023-08-04 03:19:46,191 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 837 transitions. [2023-08-04 03:19:46,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 837 transitions. [2023-08-04 03:19:46,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:46,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 837 transitions. [2023-08-04 03:19:46,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.4) internal successors, (837), 5 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:46,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:46,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:19:46,196 INFO L175 Difference]: Start difference. First operand has 107 places, 118 transitions, 1435 flow. Second operand 5 states and 837 transitions. [2023-08-04 03:19:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 257 transitions, 3109 flow [2023-08-04 03:19:49,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 257 transitions, 2616 flow, removed 244 selfloop flow, removed 6 redundant places. [2023-08-04 03:19:49,140 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1281 flow [2023-08-04 03:19:49,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1281, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2023-08-04 03:19:49,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2023-08-04 03:19:49,141 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1281 flow [2023-08-04 03:19:49,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 148.4) internal successors, (1484), 10 states have internal predecessors, (1484), 0 states have call successors, (0), 0 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 03:19:49,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:49,141 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:49,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 03:19:49,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:49,342 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:49,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1502621557, now seen corresponding path program 5 times [2023-08-04 03:19:49,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609240132] [2023-08-04 03:19:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:19:49,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:49,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609240132] [2023-08-04 03:19:49,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609240132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:49,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:49,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 03:19:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524517581] [2023-08-04 03:19:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:49,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:49,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:49,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:49,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2023-08-04 03:19:49,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1281 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:19:49,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:49,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2023-08-04 03:19:49,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:59,837 INFO L124 PetriNetUnfolderBase]: 68223/96736 cut-off events. [2023-08-04 03:19:59,838 INFO L125 PetriNetUnfolderBase]: For 608481/608487 co-relation queries the response was YES. [2023-08-04 03:20:00,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476543 conditions, 96736 events. 68223/96736 cut-off events. For 608481/608487 co-relation queries the response was YES. Maximal size of possible extension queue 2644. Compared 666105 event pairs, 25804 based on Foata normal form. 158/92694 useless extension candidates. Maximal degree in co-relation 476481. Up to 70384 conditions per place. [2023-08-04 03:20:00,770 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 185 selfloop transitions, 25 changer transitions 47/263 dead transitions. [2023-08-04 03:20:00,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 263 transitions, 2754 flow [2023-08-04 03:20:00,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 03:20:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 03:20:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 996 transitions. [2023-08-04 03:20:00,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47564469914040114 [2023-08-04 03:20:00,771 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 996 transitions. [2023-08-04 03:20:00,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 996 transitions. [2023-08-04 03:20:00,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:00,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 996 transitions. [2023-08-04 03:20:00,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 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 03:20:00,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 03:20:00,776 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 03:20:00,776 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1281 flow. Second operand 6 states and 996 transitions. [2023-08-04 03:20:00,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 263 transitions, 2754 flow [2023-08-04 03:20:02,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 263 transitions, 2686 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-04 03:20:02,708 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 1295 flow [2023-08-04 03:20:02,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1295, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2023-08-04 03:20:02,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2023-08-04 03:20:02,709 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 1295 flow [2023-08-04 03:20:02,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:20:02,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:02,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:02,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 03:20:02,709 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:02,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:02,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1642372065, now seen corresponding path program 6 times [2023-08-04 03:20:02,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:02,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342332312] [2023-08-04 03:20:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:20:02,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342332312] [2023-08-04 03:20:02,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342332312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:02,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:02,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 03:20:02,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055474002] [2023-08-04 03:20:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:02,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:02,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 349 [2023-08-04 03:20:02,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 1295 flow. Second operand has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:20:02,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:02,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 349 [2023-08-04 03:20:02,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:12,399 INFO L124 PetriNetUnfolderBase]: 60353/84741 cut-off events. [2023-08-04 03:20:12,399 INFO L125 PetriNetUnfolderBase]: For 588561/588579 co-relation queries the response was YES. [2023-08-04 03:20:12,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425013 conditions, 84741 events. 60353/84741 cut-off events. For 588561/588579 co-relation queries the response was YES. Maximal size of possible extension queue 2260. Compared 556364 event pairs, 22943 based on Foata normal form. 158/80763 useless extension candidates. Maximal degree in co-relation 424949. Up to 56087 conditions per place. [2023-08-04 03:20:13,248 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 138 selfloop transitions, 24 changer transitions 43/211 dead transitions. [2023-08-04 03:20:13,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 211 transitions, 2289 flow [2023-08-04 03:20:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:20:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:20:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-08-04 03:20:13,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47048710601719196 [2023-08-04 03:20:13,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-08-04 03:20:13,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-08-04 03:20:13,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:13,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-08-04 03:20:13,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 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 03:20:13,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:20:13,252 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 03:20:13,252 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 1295 flow. Second operand 5 states and 821 transitions. [2023-08-04 03:20:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 211 transitions, 2289 flow [2023-08-04 03:20:14,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 211 transitions, 2227 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:14,503 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 1208 flow [2023-08-04 03:20:14,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1208, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2023-08-04 03:20:14,504 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2023-08-04 03:20:14,504 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 1208 flow [2023-08-04 03:20:14,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 148.8) internal successors, (744), 5 states have internal predecessors, (744), 0 states have call successors, (0), 0 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 03:20:14,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:14,504 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:14,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 03:20:14,505 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:14,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 431901967, now seen corresponding path program 1 times [2023-08-04 03:20:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390505324] [2023-08-04 03:20:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 03:20:14,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390505324] [2023-08-04 03:20:14,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390505324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:14,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302222763] [2023-08-04 03:20:14,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:14,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:14,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:14,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:20:14,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 03:20:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:14,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 03:20:14,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 03:20:15,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 03:20:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302222763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:15,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-04 03:20:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660220381] [2023-08-04 03:20:15,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 03:20:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 03:20:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-08-04 03:20:15,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-04 03:20:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 1208 flow. Second operand has 24 states, 24 states have (on average 143.83333333333334) internal successors, (3452), 24 states have internal predecessors, (3452), 0 states have call successors, (0), 0 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 03:20:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:15,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-04 03:20:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:28,524 INFO L124 PetriNetUnfolderBase]: 76034/112959 cut-off events. [2023-08-04 03:20:28,524 INFO L125 PetriNetUnfolderBase]: For 899916/905735 co-relation queries the response was YES. [2023-08-04 03:20:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537931 conditions, 112959 events. 76034/112959 cut-off events. For 899916/905735 co-relation queries the response was YES. Maximal size of possible extension queue 3547. Compared 882563 event pairs, 27481 based on Foata normal form. 19688/127743 useless extension candidates. Maximal degree in co-relation 533377. Up to 70967 conditions per place. [2023-08-04 03:20:29,612 INFO L140 encePairwiseOnDemand]: 342/349 looper letters, 207 selfloop transitions, 27 changer transitions 65/311 dead transitions. [2023-08-04 03:20:29,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 311 transitions, 3483 flow [2023-08-04 03:20:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 03:20:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 03:20:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1557 transitions. [2023-08-04 03:20:29,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461318051575931 [2023-08-04 03:20:29,614 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1557 transitions. [2023-08-04 03:20:29,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1557 transitions. [2023-08-04 03:20:29,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:29,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1557 transitions. [2023-08-04 03:20:29,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 155.7) internal successors, (1557), 10 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:29,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 349.0) internal successors, (3839), 11 states have internal predecessors, (3839), 0 states have call successors, (0), 0 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 03:20:29,618 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 349.0) internal successors, (3839), 11 states have internal predecessors, (3839), 0 states have call successors, (0), 0 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 03:20:29,618 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 1208 flow. Second operand 10 states and 1557 transitions. [2023-08-04 03:20:29,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 311 transitions, 3483 flow [2023-08-04 03:20:31,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 311 transitions, 3302 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-08-04 03:20:31,751 INFO L231 Difference]: Finished difference. Result has 113 places, 142 transitions, 1714 flow [2023-08-04 03:20:31,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1714, PETRI_PLACES=113, PETRI_TRANSITIONS=142} [2023-08-04 03:20:31,752 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2023-08-04 03:20:31,752 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 142 transitions, 1714 flow [2023-08-04 03:20:31,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 143.83333333333334) internal successors, (3452), 24 states have internal predecessors, (3452), 0 states have call successors, (0), 0 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 03:20:31,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:31,754 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:31,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 03:20:31,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-04 03:20:31,960 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:31,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2054840093, now seen corresponding path program 2 times [2023-08-04 03:20:31,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:31,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631836446] [2023-08-04 03:20:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:20:33,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:33,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631836446] [2023-08-04 03:20:33,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631836446] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:33,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693068063] [2023-08-04 03:20:33,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:20:33,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:33,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:20:33,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 03:20:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:20:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:20:33,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-04 03:20:33,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:33,612 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 03:20:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:33,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-04 03:20:33,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-04 03:20:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:20:33,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:34,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:34,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-04 03:20:34,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-04 03:20:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:20:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693068063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:34,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:34,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2023-08-04 03:20:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894491655] [2023-08-04 03:20:34,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:34,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-04 03:20:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-04 03:20:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2023-08-04 03:20:35,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 349 [2023-08-04 03:20:35,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 142 transitions, 1714 flow. Second operand has 40 states, 40 states have (on average 124.35) internal successors, (4974), 40 states have internal predecessors, (4974), 0 states have call successors, (0), 0 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 03:20:35,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:35,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 349 [2023-08-04 03:20:35,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand