/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-simple-queue.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:19:58,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:19:58,491 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:19:58,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:19:58,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:19:58,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:19:58,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:19:58,539 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:19:58,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:19:58,540 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:19:58,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:19:58,541 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:19:58,541 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:19:58,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:19:58,542 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:19:58,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:19:58,542 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:19:58,543 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:19:58,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:19:58,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:19:58,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:19:58,549 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:19:58,549 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:19:58,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:19:58,555 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:19:58,556 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:19:58,556 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:19:58,556 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:19:58,557 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:19:58,557 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:19:58,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:19:58,558 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:19:58,558 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:19:58,558 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:19:58,558 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:19:58,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:19:58,559 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:19:58,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:19:58,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:19:58,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:19:58,559 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:19:58,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:19:58,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:19:58,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:19:58,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:19:58,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:19:58,762 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:19:58,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c [2023-08-04 03:19:59,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:20:00,129 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:20:00,129 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-simple-queue.wvr_bound2.c [2023-08-04 03:20:00,135 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d8bc12a4/32bc1a468e3e41dc93d46c7b7f059aa4/FLAG46e31baa2 [2023-08-04 03:20:00,146 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d8bc12a4/32bc1a468e3e41dc93d46c7b7f059aa4 [2023-08-04 03:20:00,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:20:00,149 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:20:00,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:20:00,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:20:00,160 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:20:00,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb0a72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00, skipping insertion in model container [2023-08-04 03:20:00,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,184 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:20:00,316 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-simple-queue.wvr_bound2.c[2600,2613] [2023-08-04 03:20:00,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:20:00,328 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:20:00,346 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-simple-queue.wvr_bound2.c[2600,2613] [2023-08-04 03:20:00,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:20:00,355 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:20:00,355 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:20:00,361 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:20:00,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00 WrapperNode [2023-08-04 03:20:00,361 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:20:00,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:20:00,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:20:00,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:20:00,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,374 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,394 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 165 [2023-08-04 03:20:00,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:20:00,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:20:00,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:20:00,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:20:00,402 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,404 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,415 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,418 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:20:00,418 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:20:00,418 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:20:00,419 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:20:00,419 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (1/1) ... [2023-08-04 03:20:00,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:20:00,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:00,452 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 03:20:00,479 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 03:20:00,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:20:00,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:20:00,493 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:20:00,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:20:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:20:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:20:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:20:00,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:20:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:20:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:20:00,497 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 03:20:00,598 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:20:00,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:20:00,837 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:20:00,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:20:00,915 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:20:00,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:20:00 BoogieIcfgContainer [2023-08-04 03:20:00,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:20:00,919 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:20:00,919 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:20:00,922 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:20:00,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:20:00" (1/3) ... [2023-08-04 03:20:00,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2872b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:20:00, skipping insertion in model container [2023-08-04 03:20:00,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:20:00" (2/3) ... [2023-08-04 03:20:00,923 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2872b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:20:00, skipping insertion in model container [2023-08-04 03:20:00,923 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:20:00" (3/3) ... [2023-08-04 03:20:00,924 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-simple-queue.wvr_bound2.c [2023-08-04 03:20:00,930 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:20:00,936 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:20:00,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:20:00,936 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:20:00,991 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:20:01,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,115 INFO L124 PetriNetUnfolderBase]: 36/284 cut-off events. [2023-08-04 03:20:01,115 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:20:01,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 284 events. 36/284 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 822 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 03:20:01,122 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,141 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:20:01,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,156 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 145 transitions, 312 flow [2023-08-04 03:20:01,198 INFO L124 PetriNetUnfolderBase]: 36/284 cut-off events. [2023-08-04 03:20:01,198 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:20:01,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 284 events. 36/284 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 822 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 03:20:01,202 INFO L119 LiptonReduction]: Number of co-enabled transitions 2142 [2023-08-04 03:20:04,863 INFO L134 LiptonReduction]: Checked pairs total: 2650 [2023-08-04 03:20:04,863 INFO L136 LiptonReduction]: Total number of compositions: 136 [2023-08-04 03:20:04,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:20:04,881 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;@662984e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:20:04,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:20:04,886 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:20:04,886 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-08-04 03:20:04,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:20:04,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:04,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:20:04,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:20:04,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:04,891 INFO L85 PathProgramCache]: Analyzing trace with hash 498726709, now seen corresponding path program 1 times [2023-08-04 03:20:04,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:04,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391275434] [2023-08-04 03:20:04,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:04,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:20:05,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:20:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:20:05,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:20:05,076 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:20:05,076 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:20:05,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:20:05,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:20:05,079 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:20:05,081 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:20:05,081 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:20:05,082 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:20:05,103 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:20:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,247 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-04 03:20:05,247 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:20:05,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-04 03:20:05,254 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:20:05,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,260 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:05,342 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-04 03:20:05,342 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:20:05,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-04 03:20:05,360 INFO L119 LiptonReduction]: Number of co-enabled transitions 5292 [2023-08-04 03:20:08,950 INFO L134 LiptonReduction]: Checked pairs total: 7792 [2023-08-04 03:20:08,951 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 03:20:08,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:20:08,953 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;@662984e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:20:08,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:20:08,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:20:08,960 INFO L124 PetriNetUnfolderBase]: 9/67 cut-off events. [2023-08-04 03:20:08,960 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:20:08,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:08,960 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:20:08,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:20:08,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 831846535, now seen corresponding path program 1 times [2023-08-04 03:20:08,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:08,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789465211] [2023-08-04 03:20:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:08,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:09,153 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 03:20:09,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:09,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789465211] [2023-08-04 03:20:09,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789465211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:09,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312870611] [2023-08-04 03:20:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:09,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:09,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:09,164 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 03:20:09,168 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 03:20:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:09,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:20:09,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:09,329 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 03:20:09,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:20:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312870611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:09,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:20:09,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:20:09,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680603139] [2023-08-04 03:20:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:09,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:09,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:20:09,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:09,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 03:20:09,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:09,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:09,747 INFO L124 PetriNetUnfolderBase]: 1977/2837 cut-off events. [2023-08-04 03:20:09,747 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2023-08-04 03:20:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5820 conditions, 2837 events. 1977/2837 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 10906 event pairs, 434 based on Foata normal form. 0/1706 useless extension candidates. Maximal degree in co-relation 2131. Up to 2644 conditions per place. [2023-08-04 03:20:09,756 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 25 selfloop transitions, 5 changer transitions 17/50 dead transitions. [2023-08-04 03:20:09,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 234 flow [2023-08-04 03:20:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:20:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:20:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 722 transitions. [2023-08-04 03:20:09,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470588235294118 [2023-08-04 03:20:09,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 722 transitions. [2023-08-04 03:20:09,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 722 transitions. [2023-08-04 03:20:09,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:09,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 722 transitions. [2023-08-04 03:20:09,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states 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 03:20:09,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 03:20:09,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 03:20:09,799 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 132 flow. Second operand 5 states and 722 transitions. [2023-08-04 03:20:09,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 234 flow [2023-08-04 03:20:09,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 50 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:20:09,805 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 87 flow [2023-08-04 03:20:09,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2023-08-04 03:20:09,809 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-04 03:20:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 87 flow [2023-08-04 03:20:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 03:20:09,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:09,810 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:09,822 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 03:20:10,014 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 03:20:10,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:20:10,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1859096166, now seen corresponding path program 1 times [2023-08-04 03:20:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:10,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306468784] [2023-08-04 03:20:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:10,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:10,112 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 03:20:10,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:10,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306468784] [2023-08-04 03:20:10,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306468784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:10,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:10,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:20:10,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839045431] [2023-08-04 03:20:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:10,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:10,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:20:10,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:10,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 03:20:10,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:10,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:10,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:10,222 INFO L124 PetriNetUnfolderBase]: 382/552 cut-off events. [2023-08-04 03:20:10,222 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 03:20:10,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 552 events. 382/552 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1470 event pairs, 114 based on Foata normal form. 1/345 useless extension candidates. Maximal degree in co-relation 495. Up to 515 conditions per place. [2023-08-04 03:20:10,225 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 23 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-04 03:20:10,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 140 flow [2023-08-04 03:20:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-04 03:20:10,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44685242518059853 [2023-08-04 03:20:10,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-04 03:20:10,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-04 03:20:10,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:10,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-04 03:20:10,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states 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 03:20:10,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:10,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:10,232 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 87 flow. Second operand 3 states and 433 transitions. [2023-08-04 03:20:10,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 140 flow [2023-08-04 03:20:10,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 137 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:10,246 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 83 flow [2023-08-04 03:20:10,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-04 03:20:10,247 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-04 03:20:10,247 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 83 flow [2023-08-04 03:20:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states 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 03:20:10,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:10,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:10,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:20:10,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:20:10,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1663054033, now seen corresponding path program 1 times [2023-08-04 03:20:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:10,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222026890] [2023-08-04 03:20:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:10,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:10,345 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 03:20:10,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:10,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222026890] [2023-08-04 03:20:10,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222026890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:10,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330330488] [2023-08-04 03:20:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:10,353 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 03:20:10,371 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 03:20:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:10,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:20:10,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:10,460 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 03:20:10,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:10,479 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 03:20:10,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330330488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:10,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:10,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:20:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411063348] [2023-08-04 03:20:10,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:10,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:10,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:10,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 03:20:10,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:10,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:10,574 INFO L124 PetriNetUnfolderBase]: 288/408 cut-off events. [2023-08-04 03:20:10,575 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 03:20:10,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 408 events. 288/408 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 919 event pairs, 48 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 506. Up to 363 conditions per place. [2023-08-04 03:20:10,577 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 25 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 03:20:10,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 150 flow [2023-08-04 03:20:10,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 569 transitions. [2023-08-04 03:20:10,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44040247678018574 [2023-08-04 03:20:10,580 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 569 transitions. [2023-08-04 03:20:10,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 569 transitions. [2023-08-04 03:20:10,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:10,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 569 transitions. [2023-08-04 03:20:10,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states 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 03:20:10,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:10,585 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:10,585 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 83 flow. Second operand 4 states and 569 transitions. [2023-08-04 03:20:10,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 150 flow [2023-08-04 03:20:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:20:10,586 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 80 flow [2023-08-04 03:20:10,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=80, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-04 03:20:10,587 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -6 predicate places. [2023-08-04 03:20:10,587 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 80 flow [2023-08-04 03:20:10,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 03:20:10,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:10,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:10,599 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 03:20:10,793 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 03:20:10,793 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:20:10,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2112786597, now seen corresponding path program 1 times [2023-08-04 03:20:10,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274716133] [2023-08-04 03:20:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:10,861 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 03:20:10,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274716133] [2023-08-04 03:20:10,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274716133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:10,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514162994] [2023-08-04 03:20:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:10,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:10,874 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 03:20:10,875 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 03:20:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:10,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:20:10,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:10,975 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 03:20:10,975 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:20:10,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514162994] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:10,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:20:10,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:20:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452262312] [2023-08-04 03:20:10,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:10,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:10,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:20:10,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:10,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 03:20:10,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:10,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:10,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:11,070 INFO L124 PetriNetUnfolderBase]: 224/320 cut-off events. [2023-08-04 03:20:11,070 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 03:20:11,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 320 events. 224/320 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 653 event pairs, 8 based on Foata normal form. 16/212 useless extension candidates. Maximal degree in co-relation 389. Up to 136 conditions per place. [2023-08-04 03:20:11,071 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-04 03:20:11,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 198 flow [2023-08-04 03:20:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:20:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:20:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 716 transitions. [2023-08-04 03:20:11,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443343653250774 [2023-08-04 03:20:11,074 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 716 transitions. [2023-08-04 03:20:11,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 716 transitions. [2023-08-04 03:20:11,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:11,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 716 transitions. [2023-08-04 03:20:11,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:11,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 03:20:11,079 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 323.0) internal successors, (1938), 6 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states 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 03:20:11,079 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 80 flow. Second operand 5 states and 716 transitions. [2023-08-04 03:20:11,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 198 flow [2023-08-04 03:20:11,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 191 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:20:11,081 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 03:20:11,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 03:20:11,083 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-04 03:20:11,083 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 03:20:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states 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 03:20:11,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:20:11,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:20:11,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 03:20:11,288 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 03:20:11,289 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:20:11,289 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:20:11,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,356 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-04 03:20:11,356 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:20:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-04 03:20:11,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,364 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:20:11,364 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,364 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 169 transitions, 386 flow [2023-08-04 03:20:11,429 INFO L124 PetriNetUnfolderBase]: 137/854 cut-off events. [2023-08-04 03:20:11,429 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:20:11,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 854 events. 137/854 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4118 event pairs, 1 based on Foata normal form. 0/714 useless extension candidates. Maximal degree in co-relation 515. Up to 32 conditions per place. [2023-08-04 03:20:11,444 INFO L119 LiptonReduction]: Number of co-enabled transitions 5292 [2023-08-04 03:20:14,917 INFO L134 LiptonReduction]: Checked pairs total: 7729 [2023-08-04 03:20:14,917 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 03:20:14,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:20:14,919 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;@662984e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:20:14,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:20:14,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:20:14,921 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-04 03:20:14,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:20:14,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:14,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:20:14,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:14,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:14,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1297344948, now seen corresponding path program 1 times [2023-08-04 03:20:14,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:14,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547944911] [2023-08-04 03:20:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:14,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:14,956 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 03:20:14,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547944911] [2023-08-04 03:20:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547944911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:14,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:14,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:20:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79579619] [2023-08-04 03:20:14,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:20:14,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:14,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 03:20:14,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:14,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:14,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:15,187 INFO L124 PetriNetUnfolderBase]: 1951/2778 cut-off events. [2023-08-04 03:20:15,187 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-08-04 03:20:15,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5711 conditions, 2778 events. 1951/2778 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 10364 event pairs, 641 based on Foata normal form. 0/1663 useless extension candidates. Maximal degree in co-relation 2130. Up to 2623 conditions per place. [2023-08-04 03:20:15,201 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 37 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-08-04 03:20:15,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 216 flow [2023-08-04 03:20:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 03:20:15,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633642930856553 [2023-08-04 03:20:15,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 03:20:15,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 03:20:15,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:15,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 03:20:15,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 03:20:15,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:15,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:15,211 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 132 flow. Second operand 3 states and 449 transitions. [2023-08-04 03:20:15,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 216 flow [2023-08-04 03:20:15,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:20:15,215 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 130 flow [2023-08-04 03:20:15,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-08-04 03:20:15,217 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 03:20:15,217 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 130 flow [2023-08-04 03:20:15,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 03:20:15,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:15,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:20:15,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:15,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1276378959, now seen corresponding path program 1 times [2023-08-04 03:20:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:15,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16719533] [2023-08-04 03:20:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:15,262 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 03:20:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16719533] [2023-08-04 03:20:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16719533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758601004] [2023-08-04 03:20:15,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:15,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:15,264 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 03:20:15,296 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 03:20:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:15,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:20:15,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:15,351 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 03:20:15,351 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:20:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758601004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:15,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:20:15,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:20:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067908311] [2023-08-04 03:20:15,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:15,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 03:20:15,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:15,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:15,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:15,615 INFO L124 PetriNetUnfolderBase]: 1945/2772 cut-off events. [2023-08-04 03:20:15,616 INFO L125 PetriNetUnfolderBase]: For 306/306 co-relation queries the response was YES. [2023-08-04 03:20:15,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5688 conditions, 2772 events. 1945/2772 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10304 event pairs, 644 based on Foata normal form. 0/1670 useless extension candidates. Maximal degree in co-relation 5654. Up to 2552 conditions per place. [2023-08-04 03:20:15,629 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 42 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 03:20:15,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 48 transitions, 234 flow [2023-08-04 03:20:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-04 03:20:15,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4664602683178535 [2023-08-04 03:20:15,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-04 03:20:15,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-04 03:20:15,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:15,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-04 03:20:15,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 03:20:15,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:15,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:15,634 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 130 flow. Second operand 3 states and 452 transitions. [2023-08-04 03:20:15,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 48 transitions, 234 flow [2023-08-04 03:20:15,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:15,636 INFO L231 Difference]: Finished difference. Result has 38 places, 41 transitions, 134 flow [2023-08-04 03:20:15,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=38, PETRI_TRANSITIONS=41} [2023-08-04 03:20:15,637 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-04 03:20:15,637 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 41 transitions, 134 flow [2023-08-04 03:20:15,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states 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 03:20:15,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:15,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:15,644 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 03:20:15,841 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 03:20:15,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:15,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1130473923, now seen corresponding path program 1 times [2023-08-04 03:20:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:15,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973968917] [2023-08-04 03:20:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:15,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:15,879 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 03:20:15,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:15,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973968917] [2023-08-04 03:20:15,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973968917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:15,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292663801] [2023-08-04 03:20:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:15,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:15,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:15,881 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 03:20:15,884 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 03:20:15,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:15,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:20:15,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:15,964 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 03:20:15,964 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:20:15,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292663801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:15,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:20:15,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:20:15,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309696135] [2023-08-04 03:20:15,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:15,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:15,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:15,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:15,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 03:20:15,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:15,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:15,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:16,184 INFO L124 PetriNetUnfolderBase]: 1789/2592 cut-off events. [2023-08-04 03:20:16,184 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-04 03:20:16,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5407 conditions, 2592 events. 1789/2592 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9698 event pairs, 620 based on Foata normal form. 0/1624 useless extension candidates. Maximal degree in co-relation 2326. Up to 1938 conditions per place. [2023-08-04 03:20:16,197 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 49 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 03:20:16,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 274 flow [2023-08-04 03:20:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-04 03:20:16,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726522187822497 [2023-08-04 03:20:16,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:16,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 03:20:16,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:16,203 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:16,203 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 134 flow. Second operand 3 states and 458 transitions. [2023-08-04 03:20:16,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 274 flow [2023-08-04 03:20:16,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:16,205 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 144 flow [2023-08-04 03:20:16,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2023-08-04 03:20:16,206 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 03:20:16,206 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 144 flow [2023-08-04 03:20:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 03:20:16,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:16,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:16,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 03:20:16,417 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 03:20:16,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:16,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash -316391015, now seen corresponding path program 1 times [2023-08-04 03:20:16,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:16,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076844269] [2023-08-04 03:20:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:16,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:16,478 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 03:20:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076844269] [2023-08-04 03:20:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076844269] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936434637] [2023-08-04 03:20:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:16,481 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 03:20:16,516 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 03:20:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:16,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:20:16,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:16,577 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 03:20:16,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:20:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936434637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:16,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:20:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:20:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888225086] [2023-08-04 03:20:16,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:16,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:16,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:16,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 03:20:16,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:16,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:16,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:16,857 INFO L124 PetriNetUnfolderBase]: 1808/2663 cut-off events. [2023-08-04 03:20:16,858 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-04 03:20:16,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5803 conditions, 2663 events. 1808/2663 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10023 event pairs, 675 based on Foata normal form. 0/1780 useless extension candidates. Maximal degree in co-relation 2643. Up to 1946 conditions per place. [2023-08-04 03:20:16,872 INFO L140 encePairwiseOnDemand]: 320/323 looper letters, 50 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-04 03:20:16,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 286 flow [2023-08-04 03:20:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-04 03:20:16,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726522187822497 [2023-08-04 03:20:16,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:16,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-04 03:20:16,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states 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 03:20:16,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:16,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:16,878 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 144 flow. Second operand 3 states and 458 transitions. [2023-08-04 03:20:16,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 286 flow [2023-08-04 03:20:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:16,880 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 154 flow [2023-08-04 03:20:16,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-08-04 03:20:16,882 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-04 03:20:16,882 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 154 flow [2023-08-04 03:20:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 03:20:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:16,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:16,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 03:20:17,087 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 03:20:17,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:17,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 718784384, now seen corresponding path program 1 times [2023-08-04 03:20:17,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:17,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090464383] [2023-08-04 03:20:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:17,131 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 03:20:17,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:17,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090464383] [2023-08-04 03:20:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090464383] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:17,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624705050] [2023-08-04 03:20:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:17,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:17,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:17,137 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 03:20:17,140 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 03:20:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:17,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:20:17,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:17,230 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 03:20:17,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:17,244 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 03:20:17,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624705050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:17,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:17,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:20:17,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724493571] [2023-08-04 03:20:17,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:17,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:17,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:17,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:17,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:17,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:17,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:17,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:17,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:17,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:17,485 INFO L124 PetriNetUnfolderBase]: 1614/2375 cut-off events. [2023-08-04 03:20:17,485 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-04 03:20:17,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 2375 events. 1614/2375 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8772 event pairs, 387 based on Foata normal form. 2/1621 useless extension candidates. Maximal degree in co-relation 3132. Up to 2207 conditions per place. [2023-08-04 03:20:17,497 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 43 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2023-08-04 03:20:17,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 51 transitions, 264 flow [2023-08-04 03:20:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-08-04 03:20:17,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45278637770897834 [2023-08-04 03:20:17,499 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-08-04 03:20:17,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-08-04 03:20:17,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:17,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-08-04 03:20:17,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states 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 03:20:17,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:17,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:17,502 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 154 flow. Second operand 4 states and 585 transitions. [2023-08-04 03:20:17,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 51 transitions, 264 flow [2023-08-04 03:20:17,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:17,508 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 166 flow [2023-08-04 03:20:17,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-04 03:20:17,508 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-08-04 03:20:17,509 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 166 flow [2023-08-04 03:20:17,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:17,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:17,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:17,520 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 03:20:17,717 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 03:20:17,717 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:17,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1425939774, now seen corresponding path program 1 times [2023-08-04 03:20:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:17,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64665820] [2023-08-04 03:20:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:17,772 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 03:20:17,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64665820] [2023-08-04 03:20:17,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64665820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:17,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029131553] [2023-08-04 03:20:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:17,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:17,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:17,774 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 03:20:17,776 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 03:20:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:17,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:20:17,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:17,871 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 03:20:17,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:17,883 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 03:20:17,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029131553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:17,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:17,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:20:17,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097546914] [2023-08-04 03:20:17,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:17,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:17,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:17,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:17,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:17,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 03:20:17,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:17,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:17,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:18,098 INFO L124 PetriNetUnfolderBase]: 1522/2239 cut-off events. [2023-08-04 03:20:18,099 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2023-08-04 03:20:18,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 2239 events. 1522/2239 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7934 event pairs, 364 based on Foata normal form. 8/1531 useless extension candidates. Maximal degree in co-relation 2911. Up to 1850 conditions per place. [2023-08-04 03:20:18,110 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 51 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-08-04 03:20:18,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 308 flow [2023-08-04 03:20:18,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:18,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-08-04 03:20:18,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45897832817337464 [2023-08-04 03:20:18,112 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-08-04 03:20:18,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-08-04 03:20:18,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:18,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-08-04 03:20:18,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 03:20:18,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:18,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:18,116 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 166 flow. Second operand 4 states and 593 transitions. [2023-08-04 03:20:18,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 308 flow [2023-08-04 03:20:18,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:18,120 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 171 flow [2023-08-04 03:20:18,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-04 03:20:18,120 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-08-04 03:20:18,120 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 171 flow [2023-08-04 03:20:18,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 03:20:18,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:18,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:18,128 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 03:20:18,328 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 03:20:18,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:18,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash 735915, now seen corresponding path program 1 times [2023-08-04 03:20:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:18,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366108751] [2023-08-04 03:20:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:20:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366108751] [2023-08-04 03:20:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366108751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330091728] [2023-08-04 03:20:18,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:18,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:18,377 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 03:20:18,385 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 03:20:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:18,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:20:18,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:20:18,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:20:18,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330091728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:18,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:18,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:20:18,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445421455] [2023-08-04 03:20:18,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:18,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:18,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:18,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:18,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:18,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 03:20:18,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:18,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:18,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:18,724 INFO L124 PetriNetUnfolderBase]: 1018/1519 cut-off events. [2023-08-04 03:20:18,725 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2023-08-04 03:20:18,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1519 events. 1018/1519 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4803 event pairs, 215 based on Foata normal form. 32/1063 useless extension candidates. Maximal degree in co-relation 2731. Up to 665 conditions per place. [2023-08-04 03:20:18,733 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 57 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-04 03:20:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 65 transitions, 346 flow [2023-08-04 03:20:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 03:20:18,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46362229102167185 [2023-08-04 03:20:18,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 03:20:18,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 03:20:18,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:18,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 03:20:18,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 03:20:18,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:18,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:18,740 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 171 flow. Second operand 4 states and 599 transitions. [2023-08-04 03:20:18,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 65 transitions, 346 flow [2023-08-04 03:20:18,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 336 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:18,743 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 182 flow [2023-08-04 03:20:18,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-04 03:20:18,744 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-04 03:20:18,744 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 182 flow [2023-08-04 03:20:18,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 0 states have call successors, (0), 0 states 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 03:20:18,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:18,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:18,755 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 03:20:18,950 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 03:20:18,950 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:18,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:18,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1570843429, now seen corresponding path program 1 times [2023-08-04 03:20:18,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:18,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755374346] [2023-08-04 03:20:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:18,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:20:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:19,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755374346] [2023-08-04 03:20:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755374346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568396554] [2023-08-04 03:20:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:19,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:19,006 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 03:20:19,009 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 03:20:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:19,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:20:19,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:20:19,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:20:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568396554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:19,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:20:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029598041] [2023-08-04 03:20:19,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:19,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:20:19,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:19,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:20:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:20:19,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 323 [2023-08-04 03:20:19,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 03:20:19,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:19,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 323 [2023-08-04 03:20:19,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:19,291 INFO L124 PetriNetUnfolderBase]: 1010/1504 cut-off events. [2023-08-04 03:20:19,291 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 03:20:19,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3570 conditions, 1504 events. 1010/1504 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4717 event pairs, 439 based on Foata normal form. 9/1029 useless extension candidates. Maximal degree in co-relation 2912. Up to 1162 conditions per place. [2023-08-04 03:20:19,298 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 57 selfloop transitions, 3 changer transitions 2/66 dead transitions. [2023-08-04 03:20:19,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 358 flow [2023-08-04 03:20:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-04 03:20:19,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46362229102167185 [2023-08-04 03:20:19,301 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-04 03:20:19,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-04 03:20:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-04 03:20:19,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 0 states have call successors, (0), 0 states 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 03:20:19,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:19,305 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:19,305 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 182 flow. Second operand 4 states and 599 transitions. [2023-08-04 03:20:19,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 358 flow [2023-08-04 03:20:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 66 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:19,308 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 186 flow [2023-08-04 03:20:19,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2023-08-04 03:20:19,309 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-04 03:20:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 186 flow [2023-08-04 03:20:19,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 140.6) internal successors, (703), 5 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 03:20:19,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:19,319 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 03:20:19,514 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 03:20:19,515 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:19,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 13379208, now seen corresponding path program 1 times [2023-08-04 03:20:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484676137] [2023-08-04 03:20:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:19,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 03:20:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484676137] [2023-08-04 03:20:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484676137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:19,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:19,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:20:19,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116935415] [2023-08-04 03:20:19,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:19,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:19,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:20:19,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 323 [2023-08-04 03:20:19,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 03:20:19,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:19,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 323 [2023-08-04 03:20:19,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:19,859 INFO L124 PetriNetUnfolderBase]: 1758/2494 cut-off events. [2023-08-04 03:20:19,859 INFO L125 PetriNetUnfolderBase]: For 1445/1445 co-relation queries the response was YES. [2023-08-04 03:20:19,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5963 conditions, 2494 events. 1758/2494 cut-off events. For 1445/1445 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8965 event pairs, 445 based on Foata normal form. 1/1639 useless extension candidates. Maximal degree in co-relation 5737. Up to 1369 conditions per place. [2023-08-04 03:20:19,872 INFO L140 encePairwiseOnDemand]: 319/323 looper letters, 63 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-04 03:20:19,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 444 flow [2023-08-04 03:20:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-04 03:20:19,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2023-08-04 03:20:19,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-04 03:20:19,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-04 03:20:19,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:19,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-04 03:20:19,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states 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 03:20:19,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:19,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:19,878 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 186 flow. Second operand 3 states and 475 transitions. [2023-08-04 03:20:19,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 444 flow [2023-08-04 03:20:19,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 428 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:19,884 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 197 flow [2023-08-04 03:20:19,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-04 03:20:19,885 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-04 03:20:19,885 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 197 flow [2023-08-04 03:20:19,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states 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 03:20:19,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:19,885 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 03:20:19,886 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:19,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:19,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1076973371, now seen corresponding path program 1 times [2023-08-04 03:20:19,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:19,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729521434] [2023-08-04 03:20:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:19,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:20:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729521434] [2023-08-04 03:20:20,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729521434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:20,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:20,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:20:20,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403715919] [2023-08-04 03:20:20,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:20,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:20:20,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:20,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:20:20,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:20:20,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:20,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 03:20:20,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:20,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:20,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:20,438 INFO L124 PetriNetUnfolderBase]: 2453/3649 cut-off events. [2023-08-04 03:20:20,438 INFO L125 PetriNetUnfolderBase]: For 1856/1856 co-relation queries the response was YES. [2023-08-04 03:20:20,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9146 conditions, 3649 events. 2453/3649 cut-off events. For 1856/1856 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 14872 event pairs, 1120 based on Foata normal form. 202/3166 useless extension candidates. Maximal degree in co-relation 8817. Up to 2625 conditions per place. [2023-08-04 03:20:20,455 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 64 selfloop transitions, 3 changer transitions 6/77 dead transitions. [2023-08-04 03:20:20,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 77 transitions, 489 flow [2023-08-04 03:20:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:20:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:20:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-04 03:20:20,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48813209494324045 [2023-08-04 03:20:20,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-04 03:20:20,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-04 03:20:20,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:20,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-04 03:20:20,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 03:20:20,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:20,460 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 323.0) internal successors, (1292), 4 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states 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 03:20:20,460 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 197 flow. Second operand 3 states and 473 transitions. [2023-08-04 03:20:20,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 77 transitions, 489 flow [2023-08-04 03:20:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 77 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:20,470 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 215 flow [2023-08-04 03:20:20,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-08-04 03:20:20,471 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-04 03:20:20,471 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 215 flow [2023-08-04 03:20:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states 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 03:20:20,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:20,471 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:20,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 03:20:20,471 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:20,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2122918046, now seen corresponding path program 1 times [2023-08-04 03:20:20,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:20,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87773596] [2023-08-04 03:20:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:20:20,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:20,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87773596] [2023-08-04 03:20:20,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87773596] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:20:20,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:20:20,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:20:20,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656230844] [2023-08-04 03:20:20,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:20:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:20:20,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:20,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:20:20,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 03:20:20,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 323 [2023-08-04 03:20:20,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 03:20:20,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:20,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 323 [2023-08-04 03:20:20,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:21,004 INFO L124 PetriNetUnfolderBase]: 2916/4525 cut-off events. [2023-08-04 03:20:21,004 INFO L125 PetriNetUnfolderBase]: For 3403/3403 co-relation queries the response was YES. [2023-08-04 03:20:21,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12233 conditions, 4525 events. 2916/4525 cut-off events. For 3403/3403 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 20770 event pairs, 1984 based on Foata normal form. 233/4753 useless extension candidates. Maximal degree in co-relation 11801. Up to 3420 conditions per place. [2023-08-04 03:20:21,029 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 42 selfloop transitions, 2 changer transitions 32/80 dead transitions. [2023-08-04 03:20:21,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 521 flow [2023-08-04 03:20:21,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:21,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-08-04 03:20:21,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46594427244582043 [2023-08-04 03:20:21,032 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-08-04 03:20:21,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-08-04 03:20:21,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:21,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-08-04 03:20:21,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 03:20:21,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:21,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:21,036 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 215 flow. Second operand 4 states and 602 transitions. [2023-08-04 03:20:21,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 521 flow [2023-08-04 03:20:21,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:21,052 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 228 flow [2023-08-04 03:20:21,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=4, PETRI_FLOW=228, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-04 03:20:21,052 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-04 03:20:21,053 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 228 flow [2023-08-04 03:20:21,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states 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 03:20:21,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:21,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:21,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 03:20:21,053 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:21,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:21,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1392024955, now seen corresponding path program 1 times [2023-08-04 03:20:21,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:21,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497850831] [2023-08-04 03:20:21,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:21,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:20:21,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:21,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497850831] [2023-08-04 03:20:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497850831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143591328] [2023-08-04 03:20:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:21,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:21,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:21,782 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 03:20:21,785 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 03:20:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:21,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-04 03:20:21,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:21,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 03:20:22,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:20:22,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:20:22,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:22,152 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 16 treesize of output 18 [2023-08-04 03:20:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:22,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-04 03:20:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:20:22,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:22,548 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:22,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-08-04 03:20:22,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:22,558 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 100 treesize of output 92 [2023-08-04 03:20:22,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:22,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2023-08-04 03:20:22,575 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 54 treesize of output 42 [2023-08-04 03:20:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:20:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143591328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:22,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:22,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-08-04 03:20:22,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185150596] [2023-08-04 03:20:22,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:22,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 03:20:22,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 03:20:22,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=271, Unknown=5, NotChecked=0, Total=342 [2023-08-04 03:20:22,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:20:22,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 228 flow. Second operand has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 03:20:22,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:22,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:20:22,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:26,370 INFO L124 PetriNetUnfolderBase]: 16977/24145 cut-off events. [2023-08-04 03:20:26,370 INFO L125 PetriNetUnfolderBase]: For 20310/20310 co-relation queries the response was YES. [2023-08-04 03:20:26,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67128 conditions, 24145 events. 16977/24145 cut-off events. For 20310/20310 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 135428 event pairs, 2221 based on Foata normal form. 5/24145 useless extension candidates. Maximal degree in co-relation 67102. Up to 5894 conditions per place. [2023-08-04 03:20:26,520 INFO L140 encePairwiseOnDemand]: 313/323 looper letters, 429 selfloop transitions, 60 changer transitions 20/513 dead transitions. [2023-08-04 03:20:26,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 513 transitions, 3417 flow [2023-08-04 03:20:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-04 03:20:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-04 03:20:26,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2696 transitions. [2023-08-04 03:20:26,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37939769209119056 [2023-08-04 03:20:26,528 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2696 transitions. [2023-08-04 03:20:26,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2696 transitions. [2023-08-04 03:20:26,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:26,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2696 transitions. [2023-08-04 03:20:26,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 122.54545454545455) internal successors, (2696), 22 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states 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 03:20:26,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 323.0) internal successors, (7429), 23 states have internal predecessors, (7429), 0 states have call successors, (0), 0 states 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 03:20:26,559 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 323.0) internal successors, (7429), 23 states have internal predecessors, (7429), 0 states have call successors, (0), 0 states 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 03:20:26,559 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 228 flow. Second operand 22 states and 2696 transitions. [2023-08-04 03:20:26,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 513 transitions, 3417 flow [2023-08-04 03:20:26,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 513 transitions, 3393 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-04 03:20:26,677 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 765 flow [2023-08-04 03:20:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=765, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2023-08-04 03:20:26,678 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-08-04 03:20:26,678 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 765 flow [2023-08-04 03:20:26,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states 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 03:20:26,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:26,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:26,691 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 03:20:26,889 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,SelfDestructingSolverStorable16 [2023-08-04 03:20:26,889 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:26,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:26,889 INFO L85 PathProgramCache]: Analyzing trace with hash -851982037, now seen corresponding path program 1 times [2023-08-04 03:20:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:26,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227677605] [2023-08-04 03:20:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:26,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:20:27,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:27,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227677605] [2023-08-04 03:20:27,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227677605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:27,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574989074] [2023-08-04 03:20:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:27,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:27,538 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 03:20:27,541 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 03:20:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:27,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-04 03:20:27,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:27,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 03:20:27,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:20:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:27,851 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 16 treesize of output 18 [2023-08-04 03:20:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:27,921 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 16 treesize of output 18 [2023-08-04 03:20:27,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:27,966 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 16 treesize of output 18 [2023-08-04 03:20:28,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 03:20:28,092 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,093 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 17 treesize of output 10 [2023-08-04 03:20:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:20:28,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:28,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-08-04 03:20:28,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,483 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 178 treesize of output 162 [2023-08-04 03:20:28,491 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 28 treesize of output 16 [2023-08-04 03:20:28,500 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 27 treesize of output 21 [2023-08-04 03:20:28,505 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 03:20:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 03:20:28,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574989074] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:28,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:28,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 18 [2023-08-04 03:20:28,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282215823] [2023-08-04 03:20:28,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:28,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 03:20:28,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:28,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 03:20:28,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=298, Unknown=6, NotChecked=0, Total=380 [2023-08-04 03:20:30,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:20:30,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:20:30,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 765 flow. Second operand has 20 states, 20 states have (on average 106.05) internal successors, (2121), 20 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states 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 03:20:30,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:30,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:20:30,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:31,346 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_474 (Array Int Int)) (v_ArrVal_476 (Array Int Int))) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_476) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) (= 5 c_~x~0)) is different from false [2023-08-04 03:20:35,063 INFO L124 PetriNetUnfolderBase]: 24832/35322 cut-off events. [2023-08-04 03:20:35,063 INFO L125 PetriNetUnfolderBase]: For 104612/104612 co-relation queries the response was YES. [2023-08-04 03:20:35,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129508 conditions, 35322 events. 24832/35322 cut-off events. For 104612/104612 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 208997 event pairs, 4401 based on Foata normal form. 5/35322 useless extension candidates. Maximal degree in co-relation 125647. Up to 11411 conditions per place. [2023-08-04 03:20:35,351 INFO L140 encePairwiseOnDemand]: 311/323 looper letters, 281 selfloop transitions, 74 changer transitions 11/370 dead transitions. [2023-08-04 03:20:35,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 370 transitions, 2989 flow [2023-08-04 03:20:35,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-04 03:20:35,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-04 03:20:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2217 transitions. [2023-08-04 03:20:35,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36125142577806746 [2023-08-04 03:20:35,357 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2217 transitions. [2023-08-04 03:20:35,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2217 transitions. [2023-08-04 03:20:35,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:35,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2217 transitions. [2023-08-04 03:20:35,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 116.6842105263158) internal successors, (2217), 19 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states 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 03:20:35,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states 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 03:20:35,372 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 323.0) internal successors, (6460), 20 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states 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 03:20:35,373 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 765 flow. Second operand 19 states and 2217 transitions. [2023-08-04 03:20:35,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 370 transitions, 2989 flow [2023-08-04 03:20:36,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 370 transitions, 2911 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-08-04 03:20:36,443 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1284 flow [2023-08-04 03:20:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1284, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2023-08-04 03:20:36,443 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-08-04 03:20:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1284 flow [2023-08-04 03:20:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.05) internal successors, (2121), 20 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states 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 03:20:36,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:36,444 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] [2023-08-04 03:20:36,448 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 03:20:36,644 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,SelfDestructingSolverStorable17 [2023-08-04 03:20:36,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:36,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1772607267, now seen corresponding path program 1 times [2023-08-04 03:20:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:36,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764579278] [2023-08-04 03:20:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:20:36,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764579278] [2023-08-04 03:20:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764579278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:36,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550076750] [2023-08-04 03:20:36,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:36,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:36,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:36,789 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 03:20:36,791 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 03:20:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:36,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 03:20:36,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:20:36,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:20:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550076750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:37,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-08-04 03:20:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580450052] [2023-08-04 03:20:37,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 03:20:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 03:20:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-08-04 03:20:37,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 323 [2023-08-04 03:20:37,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1284 flow. Second operand has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 03:20:37,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:37,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 323 [2023-08-04 03:20:37,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:42,303 INFO L124 PetriNetUnfolderBase]: 35584/51206 cut-off events. [2023-08-04 03:20:42,303 INFO L125 PetriNetUnfolderBase]: For 239203/239203 co-relation queries the response was YES. [2023-08-04 03:20:42,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213717 conditions, 51206 events. 35584/51206 cut-off events. For 239203/239203 co-relation queries the response was YES. Maximal size of possible extension queue 1208. Compared 325652 event pairs, 9788 based on Foata normal form. 1414/52608 useless extension candidates. Maximal degree in co-relation 210386. Up to 26659 conditions per place. [2023-08-04 03:20:42,766 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 169 selfloop transitions, 58 changer transitions 0/231 dead transitions. [2023-08-04 03:20:42,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 231 transitions, 2394 flow [2023-08-04 03:20:42,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:20:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:20:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-04 03:20:42,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49613003095975233 [2023-08-04 03:20:42,768 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-04 03:20:42,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-04 03:20:42,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:42,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-04 03:20:42,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states 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 03:20:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:42,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states 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 03:20:42,772 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1284 flow. Second operand 4 states and 641 transitions. [2023-08-04 03:20:42,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 231 transitions, 2394 flow [2023-08-04 03:20:43,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 231 transitions, 2240 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-08-04 03:20:43,902 INFO L231 Difference]: Finished difference. Result has 110 places, 167 transitions, 1705 flow [2023-08-04 03:20:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1705, PETRI_PLACES=110, PETRI_TRANSITIONS=167} [2023-08-04 03:20:43,903 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 72 predicate places. [2023-08-04 03:20:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 167 transitions, 1705 flow [2023-08-04 03:20:43,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.25) internal successors, (1170), 8 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states 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 03:20:43,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:43,904 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] [2023-08-04 03:20:43,911 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 03:20:44,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:44,108 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:44,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:44,109 INFO L85 PathProgramCache]: Analyzing trace with hash -26457135, now seen corresponding path program 2 times [2023-08-04 03:20:44,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:44,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893382784] [2023-08-04 03:20:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:44,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:20:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893382784] [2023-08-04 03:20:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893382784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110854550] [2023-08-04 03:20:44,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:20:44,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:44,830 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 03:20:44,852 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 03:20:44,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:20:44,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:20:44,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-04 03:20:44,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:20:45,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:45,096 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-04 03:20:45,096 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 24 treesize of output 11 [2023-08-04 03:20:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 03:20:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110854550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:45,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:45,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-08-04 03:20:45,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772663828] [2023-08-04 03:20:45,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:45,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 03:20:45,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:45,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 03:20:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-04 03:20:45,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 323 [2023-08-04 03:20:45,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 167 transitions, 1705 flow. Second operand has 11 states, 11 states have (on average 126.27272727272727) internal successors, (1389), 11 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 03:20:45,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:45,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 323 [2023-08-04 03:20:45,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:52,539 INFO L124 PetriNetUnfolderBase]: 47368/67977 cut-off events. [2023-08-04 03:20:52,540 INFO L125 PetriNetUnfolderBase]: For 489367/489367 co-relation queries the response was YES. [2023-08-04 03:20:52,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316846 conditions, 67977 events. 47368/67977 cut-off events. For 489367/489367 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 446699 event pairs, 9492 based on Foata normal form. 3/67976 useless extension candidates. Maximal degree in co-relation 308128. Up to 33887 conditions per place. [2023-08-04 03:20:53,073 INFO L140 encePairwiseOnDemand]: 313/323 looper letters, 286 selfloop transitions, 79 changer transitions 21/390 dead transitions. [2023-08-04 03:20:53,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 390 transitions, 4089 flow [2023-08-04 03:20:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 03:20:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 03:20:53,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1431 transitions. [2023-08-04 03:20:53,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44303405572755417 [2023-08-04 03:20:53,077 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1431 transitions. [2023-08-04 03:20:53,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1431 transitions. [2023-08-04 03:20:53,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:53,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1431 transitions. [2023-08-04 03:20:53,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 143.1) internal successors, (1431), 10 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states 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 03:20:53,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states 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 03:20:53,084 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 323.0) internal successors, (3553), 11 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states 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 03:20:53,084 INFO L175 Difference]: Start difference. First operand has 110 places, 167 transitions, 1705 flow. Second operand 10 states and 1431 transitions. [2023-08-04 03:20:53,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 390 transitions, 4089 flow [2023-08-04 03:20:56,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 390 transitions, 4001 flow, removed 44 selfloop flow, removed 0 redundant places. [2023-08-04 03:20:56,459 INFO L231 Difference]: Finished difference. Result has 122 places, 197 transitions, 2336 flow [2023-08-04 03:20:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2336, PETRI_PLACES=122, PETRI_TRANSITIONS=197} [2023-08-04 03:20:56,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-08-04 03:20:56,460 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 197 transitions, 2336 flow [2023-08-04 03:20:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 126.27272727272727) internal successors, (1389), 11 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states 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 03:20:56,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:56,461 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] [2023-08-04 03:20:56,468 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 03:20:56,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:56,666 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:56,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash 111847747, now seen corresponding path program 2 times [2023-08-04 03:20:56,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:56,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127381946] [2023-08-04 03:20:56,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:20:57,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127381946] [2023-08-04 03:20:57,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127381946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146782342] [2023-08-04 03:20:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:20:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:57,511 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 03:20:57,517 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 03:20:57,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:20:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:20:57,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-04 03:20:57,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:57,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:57,749 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 03:20:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:57,797 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 03:20:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:57,819 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 03:20:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:20:57,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:57,973 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int)) (v_ArrVal_599 (Array Int Int))) (= 5 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_599) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-04 03:20:57,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:57,994 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 80 treesize of output 72 [2023-08-04 03:20:58,000 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 60 treesize of output 48 [2023-08-04 03:20:58,004 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 26 treesize of output 20 [2023-08-04 03:20:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 5 not checked. [2023-08-04 03:20:58,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146782342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:58,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:58,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-08-04 03:20:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017888517] [2023-08-04 03:20:58,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 03:20:58,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 03:20:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=4, NotChecked=30, Total=306 [2023-08-04 03:20:58,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:20:58,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 197 transitions, 2336 flow. Second operand has 18 states, 18 states have (on average 106.5) internal successors, (1917), 18 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states 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 03:20:58,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:58,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:20:58,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:21:07,786 INFO L124 PetriNetUnfolderBase]: 58860/84073 cut-off events. [2023-08-04 03:21:07,786 INFO L125 PetriNetUnfolderBase]: For 558046/558046 co-relation queries the response was YES. [2023-08-04 03:21:08,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395099 conditions, 84073 events. 58860/84073 cut-off events. For 558046/558046 co-relation queries the response was YES. Maximal size of possible extension queue 1962. Compared 562246 event pairs, 11603 based on Foata normal form. 3/84066 useless extension candidates. Maximal degree in co-relation 384533. Up to 31859 conditions per place. [2023-08-04 03:21:08,775 INFO L140 encePairwiseOnDemand]: 291/323 looper letters, 272 selfloop transitions, 176 changer transitions 31/483 dead transitions. [2023-08-04 03:21:08,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 483 transitions, 5367 flow [2023-08-04 03:21:08,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 03:21:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 03:21:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1593 transitions. [2023-08-04 03:21:08,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3793760419147416 [2023-08-04 03:21:08,779 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1593 transitions. [2023-08-04 03:21:08,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1593 transitions. [2023-08-04 03:21:08,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:21:08,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1593 transitions. [2023-08-04 03:21:08,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.53846153846153) internal successors, (1593), 13 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states 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 03:21:08,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 323.0) internal successors, (4522), 14 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states 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 03:21:08,789 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 323.0) internal successors, (4522), 14 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states 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 03:21:08,789 INFO L175 Difference]: Start difference. First operand has 122 places, 197 transitions, 2336 flow. Second operand 13 states and 1593 transitions. [2023-08-04 03:21:08,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 483 transitions, 5367 flow [2023-08-04 03:21:15,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 483 transitions, 5270 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-04 03:21:15,096 INFO L231 Difference]: Finished difference. Result has 132 places, 275 transitions, 3699 flow [2023-08-04 03:21:15,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3699, PETRI_PLACES=132, PETRI_TRANSITIONS=275} [2023-08-04 03:21:15,097 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 94 predicate places. [2023-08-04 03:21:15,097 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 275 transitions, 3699 flow [2023-08-04 03:21:15,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 106.5) internal successors, (1917), 18 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states 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 03:21:15,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:21:15,097 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] [2023-08-04 03:21:15,101 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 03:21:15,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:21:15,298 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:21:15,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:21:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2024782453, now seen corresponding path program 1 times [2023-08-04 03:21:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:21:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401164356] [2023-08-04 03:21:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:21:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:21:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:21:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:21:15,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:21:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401164356] [2023-08-04 03:21:15,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401164356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:21:15,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565352330] [2023-08-04 03:21:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:21:15,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:21:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:21:15,437 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 03:21:15,440 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 03:21:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:21:15,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 03:21:15,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:21:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:21:15,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:21:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:21:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565352330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:21:15,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:21:15,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-04 03:21:15,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443379592] [2023-08-04 03:21:15,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:21:15,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 03:21:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:21:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 03:21:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-04 03:21:15,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 323 [2023-08-04 03:21:15,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 275 transitions, 3699 flow. Second operand has 12 states, 12 states have (on average 133.75) internal successors, (1605), 12 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states 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 03:21:15,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:21:15,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 323 [2023-08-04 03:21:15,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:21:22,636 INFO L124 PetriNetUnfolderBase]: 36966/54926 cut-off events. [2023-08-04 03:21:22,636 INFO L125 PetriNetUnfolderBase]: For 576736/576883 co-relation queries the response was YES. [2023-08-04 03:21:22,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328692 conditions, 54926 events. 36966/54926 cut-off events. For 576736/576883 co-relation queries the response was YES. Maximal size of possible extension queue 1340. Compared 364210 event pairs, 20726 based on Foata normal form. 1572/56498 useless extension candidates. Maximal degree in co-relation 328607. Up to 44688 conditions per place. [2023-08-04 03:21:23,072 INFO L140 encePairwiseOnDemand]: 318/323 looper letters, 192 selfloop transitions, 3 changer transitions 93/292 dead transitions. [2023-08-04 03:21:23,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 292 transitions, 4093 flow [2023-08-04 03:21:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 03:21:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 03:21:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 877 transitions. [2023-08-04 03:21:23,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252837977296184 [2023-08-04 03:21:23,076 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 877 transitions. [2023-08-04 03:21:23,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 877 transitions. [2023-08-04 03:21:23,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:21:23,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 877 transitions. [2023-08-04 03:21:23,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states 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 03:21:23,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 03:21:23,080 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 323.0) internal successors, (2261), 7 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states 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 03:21:23,080 INFO L175 Difference]: Start difference. First operand has 132 places, 275 transitions, 3699 flow. Second operand 6 states and 877 transitions. [2023-08-04 03:21:23,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 292 transitions, 4093 flow [2023-08-04 03:21:27,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 292 transitions, 3921 flow, removed 44 selfloop flow, removed 10 redundant places. [2023-08-04 03:21:27,679 INFO L231 Difference]: Finished difference. Result has 119 places, 199 transitions, 2449 flow [2023-08-04 03:21:27,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=2662, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2449, PETRI_PLACES=119, PETRI_TRANSITIONS=199} [2023-08-04 03:21:27,679 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-08-04 03:21:27,680 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 199 transitions, 2449 flow [2023-08-04 03:21:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 133.75) internal successors, (1605), 12 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states 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 03:21:27,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:21:27,680 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-04 03:21:27,688 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 03:21:27,885 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,SelfDestructingSolverStorable21 [2023-08-04 03:21:27,885 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:21:27,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:21:27,885 INFO L85 PathProgramCache]: Analyzing trace with hash -163319678, now seen corresponding path program 3 times [2023-08-04 03:21:27,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:21:27,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137447074] [2023-08-04 03:21:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:21:27,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:21:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:21:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:21:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:21:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137447074] [2023-08-04 03:21:28,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137447074] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:21:28,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515914264] [2023-08-04 03:21:28,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 03:21:28,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:21:28,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:21:28,721 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 03:21:28,750 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 03:21:28,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 03:21:28,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:21:28,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-04 03:21:28,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:21:28,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-04 03:21:29,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:21:29,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:21:29,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:21:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:21:29,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:21:29,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:21:29,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:21:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 03:21:29,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:21:29,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:21:29,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-04 03:21:29,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:21:29,780 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 106 treesize of output 96 [2023-08-04 03:21:29,786 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 34 treesize of output 27 [2023-08-04 03:21:29,791 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 56 treesize of output 42 [2023-08-04 03:21:29,800 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 25 treesize of output 18 [2023-08-04 03:21:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 03:21:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515914264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:21:29,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:21:29,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 28 [2023-08-04 03:21:29,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271756610] [2023-08-04 03:21:29,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:21:29,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 03:21:29,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:21:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 03:21:29,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=744, Unknown=4, NotChecked=0, Total=870 [2023-08-04 03:21:30,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:21:30,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 199 transitions, 2449 flow. Second operand has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 03:21:30,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:21:30,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:21:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:21:33,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:35,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:36,159 WARN L839 $PredicateComparison]: unable to prove that (and (= 5 c_~x~0) (forall ((v_ArrVal_687 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_687) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4))))) is different from false [2023-08-04 03:21:38,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:40,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:42,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:44,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:46,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:48,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:50,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:21:53,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:08,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:10,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:12,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:13,894 INFO L124 PetriNetUnfolderBase]: 84524/119938 cut-off events. [2023-08-04 03:22:13,894 INFO L125 PetriNetUnfolderBase]: For 817400/818977 co-relation queries the response was YES. [2023-08-04 03:22:14,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 689091 conditions, 119938 events. 84524/119938 cut-off events. For 817400/818977 co-relation queries the response was YES. Maximal size of possible extension queue 2727. Compared 832179 event pairs, 12178 based on Foata normal form. 103/120017 useless extension candidates. Maximal degree in co-relation 689039. Up to 68226 conditions per place. [2023-08-04 03:22:14,971 INFO L140 encePairwiseOnDemand]: 295/323 looper letters, 552 selfloop transitions, 248 changer transitions 34/838 dead transitions. [2023-08-04 03:22:14,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 838 transitions, 10582 flow [2023-08-04 03:22:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-04 03:22:14,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-04 03:22:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3593 transitions. [2023-08-04 03:22:14,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37079463364293086 [2023-08-04 03:22:14,975 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3593 transitions. [2023-08-04 03:22:14,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3593 transitions. [2023-08-04 03:22:14,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:22:14,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3593 transitions. [2023-08-04 03:22:14,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 119.76666666666667) internal successors, (3593), 30 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states 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 03:22:14,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 323.0) internal successors, (10013), 31 states have internal predecessors, (10013), 0 states have call successors, (0), 0 states 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 03:22:14,992 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 323.0) internal successors, (10013), 31 states have internal predecessors, (10013), 0 states have call successors, (0), 0 states 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 03:22:14,992 INFO L175 Difference]: Start difference. First operand has 119 places, 199 transitions, 2449 flow. Second operand 30 states and 3593 transitions. [2023-08-04 03:22:14,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 838 transitions, 10582 flow [2023-08-04 03:22:21,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 838 transitions, 10540 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-04 03:22:21,431 INFO L231 Difference]: Finished difference. Result has 152 places, 394 transitions, 6186 flow [2023-08-04 03:22:21,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=6186, PETRI_PLACES=152, PETRI_TRANSITIONS=394} [2023-08-04 03:22:21,432 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 114 predicate places. [2023-08-04 03:22:21,432 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 394 transitions, 6186 flow [2023-08-04 03:22:21,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.6) internal successors, (3138), 30 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states 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 03:22:21,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:22:21,433 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] [2023-08-04 03:22:21,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 03:22:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:22:21,634 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:22:21,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:22:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -980794861, now seen corresponding path program 1 times [2023-08-04 03:22:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:22:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379633432] [2023-08-04 03:22:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:22:21,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:22:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:22:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:22:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:22:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379633432] [2023-08-04 03:22:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379633432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:22:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410121596] [2023-08-04 03:22:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:22:22,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:22:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:22:22,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:22:22,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 03:22:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:22:22,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-04 03:22:22,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:22:22,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-04 03:22:22,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:22:22,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:22:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:22:22,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:22:22,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:22:22,844 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 03:22:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:22:22,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:22:23,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:22:23,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-04 03:22:23,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:22:23,345 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 106 treesize of output 96 [2023-08-04 03:22:23,349 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 63 treesize of output 49 [2023-08-04 03:22:23,356 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:22:23,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2023-08-04 03:22:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:22:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410121596] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:22:23,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:22:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-08-04 03:22:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660386708] [2023-08-04 03:22:23,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:22:23,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-04 03:22:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:22:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-04 03:22:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=692, Unknown=9, NotChecked=0, Total=812 [2023-08-04 03:22:23,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:22:23,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 394 transitions, 6186 flow. Second operand has 29 states, 29 states have (on average 105.58620689655173) internal successors, (3062), 29 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states 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 03:22:23,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:22:23,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:22:23,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:22:26,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:30,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:22:58,954 INFO L124 PetriNetUnfolderBase]: 128533/183476 cut-off events. [2023-08-04 03:22:58,955 INFO L125 PetriNetUnfolderBase]: For 1877625/1879215 co-relation queries the response was YES. [2023-08-04 03:23:00,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1237871 conditions, 183476 events. 128533/183476 cut-off events. For 1877625/1879215 co-relation queries the response was YES. Maximal size of possible extension queue 4283. Compared 1354622 event pairs, 21920 based on Foata normal form. 2784/186256 useless extension candidates. Maximal degree in co-relation 1200801. Up to 107748 conditions per place. [2023-08-04 03:23:01,256 INFO L140 encePairwiseOnDemand]: 313/323 looper letters, 766 selfloop transitions, 366 changer transitions 33/1169 dead transitions. [2023-08-04 03:23:01,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1169 transitions, 18173 flow [2023-08-04 03:23:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-04 03:23:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-04 03:23:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4007 transitions. [2023-08-04 03:23:01,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37592644713387746 [2023-08-04 03:23:01,260 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4007 transitions. [2023-08-04 03:23:01,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4007 transitions. [2023-08-04 03:23:01,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:23:01,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4007 transitions. [2023-08-04 03:23:01,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 121.42424242424242) internal successors, (4007), 33 states have internal predecessors, (4007), 0 states have call successors, (0), 0 states 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 03:23:01,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 323.0) internal successors, (10982), 34 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states 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 03:23:01,275 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 323.0) internal successors, (10982), 34 states have internal predecessors, (10982), 0 states have call successors, (0), 0 states 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 03:23:01,275 INFO L175 Difference]: Start difference. First operand has 152 places, 394 transitions, 6186 flow. Second operand 33 states and 4007 transitions. [2023-08-04 03:23:01,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1169 transitions, 18173 flow [2023-08-04 03:23:30,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 1169 transitions, 16915 flow, removed 621 selfloop flow, removed 5 redundant places. [2023-08-04 03:23:30,038 INFO L231 Difference]: Finished difference. Result has 194 places, 579 transitions, 9590 flow [2023-08-04 03:23:30,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9590, PETRI_PLACES=194, PETRI_TRANSITIONS=579} [2023-08-04 03:23:30,040 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 156 predicate places. [2023-08-04 03:23:30,040 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 579 transitions, 9590 flow [2023-08-04 03:23:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 105.58620689655173) internal successors, (3062), 29 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states 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 03:23:30,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:23:30,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-04 03:23:30,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 03:23:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:23:30,247 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:23:30,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:23:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 147143094, now seen corresponding path program 4 times [2023-08-04 03:23:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:23:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437074000] [2023-08-04 03:23:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:23:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:23:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:23:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 03:23:30,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:23:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437074000] [2023-08-04 03:23:30,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437074000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:23:30,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178982261] [2023-08-04 03:23:30,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 03:23:30,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:23:30,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:23:30,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:23:30,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 03:23:31,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 03:23:31,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:23:31,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-04 03:23:31,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:23:31,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-04 03:23:31,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:23:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:23:31,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:23:31,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:23:31,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:23:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:23:31,471 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 03:23:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:23:31,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:23:31,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:23:31,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 47 [2023-08-04 03:23:31,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:23:31,966 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 188 treesize of output 169 [2023-08-04 03:23:31,975 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 28 treesize of output 21 [2023-08-04 03:23:31,980 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 25 treesize of output 18 [2023-08-04 03:23:32,012 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 30 treesize of output 16 [2023-08-04 03:23:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:23:32,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178982261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:23:32,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:23:32,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 28 [2023-08-04 03:23:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681222074] [2023-08-04 03:23:32,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:23:32,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-04 03:23:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:23:32,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-04 03:23:32,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=739, Unknown=8, NotChecked=0, Total=870 [2023-08-04 03:23:34,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:36,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:36,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 323 [2023-08-04 03:23:36,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 579 transitions, 9590 flow. Second operand has 30 states, 30 states have (on average 104.73333333333333) internal successors, (3142), 30 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states 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 03:23:36,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:23:36,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 323 [2023-08-04 03:23:36,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:23:38,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:40,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:41,392 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_781 (Array Int Int)) (v_ArrVal_783 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_783) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)) 5)) (= 5 c_~x~0)) is different from false [2023-08-04 03:23:41,429 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4) 4))) (and (or (forall ((v_ArrVal_781 (Array Int Int)) (v_ArrVal_783 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_783) c_~queue~0.base) .cse0) 5)) (<= c_~n~0 (+ c_~back~0 1)) (< c_~back~0 0) (not (= 5 (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4) 4))))) (forall ((v_ArrVal_783 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_783) c_~queue~0.base) .cse0))))) is different from false [2023-08-04 03:23:41,642 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_~queue~0.offset (* c_~front~0 4) 4)) (.cse6 (* c_~back~0 4))) (let ((.cse3 (select |c_#memory_int| c_~queue~0.base)) (.cse4 (+ c_~queue~0.offset .cse6 4)) (.cse0 (forall ((v_ArrVal_781 (Array Int Int)) (v_ArrVal_783 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_781) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_783) c_~queue~0.base) .cse5) 5))) (.cse1 (<= c_~n~0 (+ c_~back~0 1))) (.cse2 (< c_~back~0 0))) (and (or .cse0 .cse1 .cse2 (not (= 5 (select .cse3 .cse4)))) (forall ((v_ArrVal_783 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_783) c_~queue~0.base) .cse5))) (or (<= c_~n~0 c_~back~0) (not (= 5 (select .cse3 (+ c_~queue~0.offset .cse6)))) .cse0 .cse2) (or (forall ((v_ArrVal_780 (Array Int Int))) (not (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_780) c_~queue~0.base) .cse4)))) .cse0 .cse1 .cse2)))) is different from false [2023-08-04 03:23:46,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:48,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:50,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:52,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:54,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:56,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:23:58,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:01,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:03,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:05,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:08,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:10,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:12,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:14,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:16,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:18,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:24:21,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:25:07,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 03:25:13,577 INFO L124 PetriNetUnfolderBase]: 191910/275059 cut-off events. [2023-08-04 03:25:13,577 INFO L125 PetriNetUnfolderBase]: For 3426913/3428692 co-relation queries the response was YES. [2023-08-04 03:25:17,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869756 conditions, 275059 events. 191910/275059 cut-off events. For 3426913/3428692 co-relation queries the response was YES. Maximal size of possible extension queue 6179. Compared 2133937 event pairs, 40464 based on Foata normal form. 101/274874 useless extension candidates. Maximal degree in co-relation 1813899. Up to 161821 conditions per place. [2023-08-04 03:25:18,403 INFO L140 encePairwiseOnDemand]: 293/323 looper letters, 859 selfloop transitions, 518 changer transitions 36/1417 dead transitions. [2023-08-04 03:25:18,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1417 transitions, 23376 flow [2023-08-04 03:25:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-04 03:25:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-04 03:25:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4156 transitions. [2023-08-04 03:25:18,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367624944714728 [2023-08-04 03:25:18,407 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4156 transitions. [2023-08-04 03:25:18,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4156 transitions. [2023-08-04 03:25:18,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:25:18,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4156 transitions. [2023-08-04 03:25:18,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 118.74285714285715) internal successors, (4156), 35 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states 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 03:25:18,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 323.0) internal successors, (11628), 36 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states 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 03:25:18,420 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 323.0) internal successors, (11628), 36 states have internal predecessors, (11628), 0 states have call successors, (0), 0 states 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 03:25:18,420 INFO L175 Difference]: Start difference. First operand has 194 places, 579 transitions, 9590 flow. Second operand 35 states and 4156 transitions. [2023-08-04 03:25:18,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1417 transitions, 23376 flow [2023-08-04 03:27:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1417 transitions, 21896 flow, removed 699 selfloop flow, removed 9 redundant places. [2023-08-04 03:27:25,870 INFO L231 Difference]: Finished difference. Result has 232 places, 824 transitions, 14541 flow [2023-08-04 03:27:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=323, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14541, PETRI_PLACES=232, PETRI_TRANSITIONS=824} [2023-08-04 03:27:25,871 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 194 predicate places. [2023-08-04 03:27:25,871 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 824 transitions, 14541 flow [2023-08-04 03:27:25,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 104.73333333333333) internal successors, (3142), 30 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states 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 03:27:25,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:27:25,871 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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] [2023-08-04 03:27:25,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 03:27:26,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:27:26,072 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:27:26,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:27:26,072 INFO L85 PathProgramCache]: Analyzing trace with hash 223316878, now seen corresponding path program 1 times [2023-08-04 03:27:26,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:27:26,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725403974] [2023-08-04 03:27:26,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:26,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:27:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 03:27:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:27:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725403974] [2023-08-04 03:27:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725403974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:27:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200855778] [2023-08-04 03:27:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:27:26,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:27:26,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:27:26,978 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:27:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 03:27:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:27:27,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-04 03:27:27,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:27:27,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:27:27,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:27:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:27:27,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-04 03:27:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:27:27,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:27:27,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:27:27,407 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 44 treesize of output 37 [2023-08-04 03:27:27,410 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 10 treesize of output 3 [2023-08-04 03:27:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:27:27,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200855778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:27:27,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:27:27,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-08-04 03:27:27,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908605853] [2023-08-04 03:27:27,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:27:27,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 03:27:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:27:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 03:27:27,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=484, Unknown=2, NotChecked=0, Total=552 [2023-08-04 03:27:28,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 323 [2023-08-04 03:27:28,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 824 transitions, 14541 flow. Second operand has 24 states, 24 states have (on average 120.5) internal successors, (2892), 24 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states 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 03:27:28,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:27:28,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 323 [2023-08-04 03:27:28,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand