/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-send-receive-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:19:01,449 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:19:01,527 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:19:01,532 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:19:01,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:19:01,533 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:19:01,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:19:01,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:19:01,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:19:01,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:19:01,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:19:01,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:19:01,568 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:19:01,569 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:19:01,569 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:19:01,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:19:01,570 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:19:01,570 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:19:01,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:19:01,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:19:01,571 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:19:01,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:19:01,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:19:01,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:19:01,571 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:19:01,572 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:19:01,572 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:19:01,572 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:19:01,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:19:01,573 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:19:01,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:19:01,574 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:19:01,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:19:01,575 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:19:01,575 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:19:01,575 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:19:01,575 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:19:01,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:19:01,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:19:01,798 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:19:01,799 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:19:01,799 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:19:01,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 03:19:02,897 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:19:03,080 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:19:03,081 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 03:19:03,086 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec9a98d6/12236c5a40f149879446e00d82889a54/FLAGa8e70a822 [2023-08-04 03:19:03,098 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ec9a98d6/12236c5a40f149879446e00d82889a54 [2023-08-04 03:19:03,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:19:03,102 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:19:03,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:19:03,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:19:03,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:19:03,108 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,109 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab02901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03, skipping insertion in model container [2023-08-04 03:19:03,109 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,134 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:19:03,299 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-04 03:19:03,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:19:03,315 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:19:03,342 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-send-receive-alt.wvr_bound2.c[2815,2828] [2023-08-04 03:19:03,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:19:03,353 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:19:03,353 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:19:03,358 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:19:03,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03 WrapperNode [2023-08-04 03:19:03,359 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:19:03,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:19:03,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:19:03,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:19:03,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,371 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,394 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 179 [2023-08-04 03:19:03,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:19:03,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:19:03,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:19:03,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:19:03,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,406 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,406 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,412 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,416 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:19:03,422 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:19:03,422 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:19:03,422 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:19:03,423 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (1/1) ... [2023-08-04 03:19:03,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:19:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:03,473 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 03:19:03,485 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 03:19:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:19:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:19:03,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:19:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:19:03,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:19:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:19:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:19:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:19:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:19:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:19:03,510 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 03:19:03,589 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:19:03,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:19:03,802 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:19:03,906 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:19:03,906 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 03:19:03,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:19:03 BoogieIcfgContainer [2023-08-04 03:19:03,908 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:19:03,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:19:03,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:19:03,913 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:19:03,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:19:03" (1/3) ... [2023-08-04 03:19:03,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379a82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:19:03, skipping insertion in model container [2023-08-04 03:19:03,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:19:03" (2/3) ... [2023-08-04 03:19:03,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@379a82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:19:03, skipping insertion in model container [2023-08-04 03:19:03,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:19:03" (3/3) ... [2023-08-04 03:19:03,915 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-send-receive-alt.wvr_bound2.c [2023-08-04 03:19:03,922 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:19:03,928 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:19:03,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:19:03,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:19:03,984 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 03:19:04,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,101 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 03:19:04,101 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:19:04,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 03:19:04,108 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,113 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,116 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:19:04,124 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,127 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 336 flow [2023-08-04 03:19:04,176 INFO L124 PetriNetUnfolderBase]: 40/308 cut-off events. [2023-08-04 03:19:04,176 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 03:19:04,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 308 events. 40/308 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 996 event pairs, 0 based on Foata normal form. 0/258 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 03:19:04,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 3510 [2023-08-04 03:19:08,111 INFO L134 LiptonReduction]: Checked pairs total: 4122 [2023-08-04 03:19:08,112 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-04 03:19:08,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:19:08,129 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;@5a8d5cf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:19:08,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:19:08,134 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:19:08,135 INFO L124 PetriNetUnfolderBase]: 3/27 cut-off events. [2023-08-04 03:19:08,135 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:19:08,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:08,135 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:19:08,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:19:08,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1324191346, now seen corresponding path program 1 times [2023-08-04 03:19:08,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:08,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36893464] [2023-08-04 03:19:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:08,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:19:08,251 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:19:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:19:08,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:19:08,293 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:19:08,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:19:08,295 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:19:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:19:08,296 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:19:08,298 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 03:19:08,299 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:19:08,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:19:08,324 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 03:19:08,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,462 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 03:19:08,462 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:19:08,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 03:19:08,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,476 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,476 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:19:08,476 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,477 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:08,577 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 03:19:08,577 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:19:08,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 03:19:08,604 INFO L119 LiptonReduction]: Number of co-enabled transitions 9396 [2023-08-04 03:19:12,750 INFO L134 LiptonReduction]: Checked pairs total: 13330 [2023-08-04 03:19:12,750 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-04 03:19:12,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:19:12,753 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;@5a8d5cf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:19:12,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 03:19:12,760 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:19:12,760 INFO L124 PetriNetUnfolderBase]: 11/75 cut-off events. [2023-08-04 03:19:12,761 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 03:19:12,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:12,761 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:19:12,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:19:12,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:12,762 INFO L85 PathProgramCache]: Analyzing trace with hash -936998760, now seen corresponding path program 1 times [2023-08-04 03:19:12,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:12,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715344089] [2023-08-04 03:19:12,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:12,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:12,911 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 03:19:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:12,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715344089] [2023-08-04 03:19:12,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715344089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249482671] [2023-08-04 03:19:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:12,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:13,142 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 03:19:13,144 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 03:19:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:13,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:19:13,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:13,348 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 03:19:13,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:13,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249482671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:13,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:13,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:19:13,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116209417] [2023-08-04 03:19:13,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:13,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:19:13,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-04 03:19:13,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:13,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:13,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-04 03:19:13,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:14,218 INFO L124 PetriNetUnfolderBase]: 6401/8630 cut-off events. [2023-08-04 03:19:14,218 INFO L125 PetriNetUnfolderBase]: For 992/992 co-relation queries the response was YES. [2023-08-04 03:19:14,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17542 conditions, 8630 events. 6401/8630 cut-off events. For 992/992 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 39084 event pairs, 2112 based on Foata normal form. 0/5337 useless extension candidates. Maximal degree in co-relation 6509. Up to 8239 conditions per place. [2023-08-04 03:19:14,244 INFO L140 encePairwiseOnDemand]: 366/372 looper letters, 27 selfloop transitions, 5 changer transitions 17/54 dead transitions. [2023-08-04 03:19:14,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 246 flow [2023-08-04 03:19:14,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:19:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:19:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 825 transitions. [2023-08-04 03:19:14,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-08-04 03:19:14,262 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 825 transitions. [2023-08-04 03:19:14,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 825 transitions. [2023-08-04 03:19:14,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:14,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 825 transitions. [2023-08-04 03:19:14,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.0) internal successors, (825), 5 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,283 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,285 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 142 flow. Second operand 5 states and 825 transitions. [2023-08-04 03:19:14,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 246 flow [2023-08-04 03:19:14,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:19:14,293 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 95 flow [2023-08-04 03:19:14,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=38, 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=5, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-08-04 03:19:14,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-04 03:19:14,298 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 95 flow [2023-08-04 03:19:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:14,299 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:14,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:19:14,505 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 03:19:14,505 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:19:14,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:14,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1765416578, now seen corresponding path program 1 times [2023-08-04 03:19:14,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:14,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105417594] [2023-08-04 03:19:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:14,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:14,583 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 03:19:14,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:14,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105417594] [2023-08-04 03:19:14,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105417594] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:14,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:14,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:19:14,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057392512] [2023-08-04 03:19:14,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:14,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:14,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:14,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:14,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:19:14,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 372 [2023-08-04 03:19:14,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 95 flow. Second operand has 3 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 03:19:14,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:14,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 372 [2023-08-04 03:19:14,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:14,745 INFO L124 PetriNetUnfolderBase]: 1220/1666 cut-off events. [2023-08-04 03:19:14,745 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2023-08-04 03:19:14,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1666 events. 1220/1666 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5784 event pairs, 464 based on Foata normal form. 1/1088 useless extension candidates. Maximal degree in co-relation 1437. Up to 1575 conditions per place. [2023-08-04 03:19:14,755 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 25 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 03:19:14,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 152 flow [2023-08-04 03:19:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:14,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:14,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-04 03:19:14,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-08-04 03:19:14,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-04 03:19:14,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-04 03:19:14,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:14,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-04 03:19:14,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,762 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 372.0) internal successors, (1488), 4 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:14,762 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 95 flow. Second operand 3 states and 495 transitions. [2023-08-04 03:19:14,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 152 flow [2023-08-04 03:19:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 149 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:14,764 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 91 flow [2023-08-04 03:19:14,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-04 03:19:14,765 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-04 03:19:14,765 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 91 flow [2023-08-04 03:19:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 03:19:14,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:14,766 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:19:14,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:19:14,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -597354250, now seen corresponding path program 1 times [2023-08-04 03:19:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537237023] [2023-08-04 03:19:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:14,877 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 03:19:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537237023] [2023-08-04 03:19:14,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537237023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:14,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138392291] [2023-08-04 03:19:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:14,880 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 03:19:14,882 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 03:19:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:14,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:19:14,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:14,968 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 03:19:14,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:14,986 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 03:19:14,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138392291] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:14,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:14,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:19:14,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892548335] [2023-08-04 03:19:14,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:14,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:14,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:14,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:14,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-04 03:19:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:15,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-04 03:19:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:15,144 INFO L124 PetriNetUnfolderBase]: 896/1200 cut-off events. [2023-08-04 03:19:15,144 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 03:19:15,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2443 conditions, 1200 events. 896/1200 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3697 event pairs, 232 based on Foata normal form. 2/774 useless extension candidates. Maximal degree in co-relation 1444. Up to 1119 conditions per place. [2023-08-04 03:19:15,151 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 27 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-04 03:19:15,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 162 flow [2023-08-04 03:19:15,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:15,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 651 transitions. [2023-08-04 03:19:15,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2023-08-04 03:19:15,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 651 transitions. [2023-08-04 03:19:15,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 651 transitions. [2023-08-04 03:19:15,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:15,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 651 transitions. [2023-08-04 03:19:15,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.75) internal successors, (651), 4 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,158 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 372.0) internal successors, (1860), 5 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,158 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 91 flow. Second operand 4 states and 651 transitions. [2023-08-04 03:19:15,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 162 flow [2023-08-04 03:19:15,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:19:15,161 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 88 flow [2023-08-04 03:19:15,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-04 03:19:15,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2023-08-04 03:19:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 88 flow [2023-08-04 03:19:15,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:15,167 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:15,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 03:19:15,376 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 03:19:15,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:19:15,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1438876425, now seen corresponding path program 1 times [2023-08-04 03:19:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:15,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423789652] [2023-08-04 03:19:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:19:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423789652] [2023-08-04 03:19:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423789652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659388609] [2023-08-04 03:19:15,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:15,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:15,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:15,502 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 03:19:15,509 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 03:19:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:15,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:19:15,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:15,607 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 03:19:15,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:15,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659388609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:15,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:15,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:19:15,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636171940] [2023-08-04 03:19:15,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:15,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:15,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:15,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:15,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:19:15,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 372 [2023-08-04 03:19:15,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:15,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 372 [2023-08-04 03:19:15,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:15,758 INFO L124 PetriNetUnfolderBase]: 632/852 cut-off events. [2023-08-04 03:19:15,758 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-04 03:19:15,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 852 events. 632/852 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2500 event pairs, 24 based on Foata normal form. 64/600 useless extension candidates. Maximal degree in co-relation 1027. Up to 376 conditions per place. [2023-08-04 03:19:15,760 INFO L140 encePairwiseOnDemand]: 369/372 looper letters, 0 selfloop transitions, 0 changer transitions 50/50 dead transitions. [2023-08-04 03:19:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 222 flow [2023-08-04 03:19:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:19:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:19:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 821 transitions. [2023-08-04 03:19:15,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413978494623656 [2023-08-04 03:19:15,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 821 transitions. [2023-08-04 03:19:15,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 821 transitions. [2023-08-04 03:19:15,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:15,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 821 transitions. [2023-08-04 03:19:15,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,769 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 372.0) internal successors, (2232), 6 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,769 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 88 flow. Second operand 5 states and 821 transitions. [2023-08-04 03:19:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 222 flow [2023-08-04 03:19:15,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:19:15,770 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-04 03:19:15,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=372, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-04 03:19:15,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-04 03:19:15,771 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-04 03:19:15,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:15,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 03:19:15,772 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 03:19:15,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 03:19:15,977 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 03:19:15,978 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:19:15,978 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 03:19:15,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,068 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 03:19:16,068 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:19:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 03:19:16,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,078 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,079 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:19:16,079 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,079 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 193 transitions, 434 flow [2023-08-04 03:19:16,160 INFO L124 PetriNetUnfolderBase]: 149/926 cut-off events. [2023-08-04 03:19:16,161 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 03:19:16,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1023 conditions, 926 events. 149/926 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4728 event pairs, 2 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 554. Up to 32 conditions per place. [2023-08-04 03:19:16,180 INFO L119 LiptonReduction]: Number of co-enabled transitions 9396 [2023-08-04 03:19:20,465 INFO L134 LiptonReduction]: Checked pairs total: 13113 [2023-08-04 03:19:20,465 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-04 03:19:20,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:19:20,479 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5a8d5cf4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:19:20,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:19:20,481 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:19:20,481 INFO L124 PetriNetUnfolderBase]: 2/15 cut-off events. [2023-08-04 03:19:20,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:19:20,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:20,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 03:19:20,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:20,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:20,482 INFO L85 PathProgramCache]: Analyzing trace with hash -912062626, now seen corresponding path program 1 times [2023-08-04 03:19:20,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:20,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615179238] [2023-08-04 03:19:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:20,508 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 03:19:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615179238] [2023-08-04 03:19:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615179238] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:20,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:20,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:19:20,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249567272] [2023-08-04 03:19:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:20,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:19:20,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 376 [2023-08-04 03:19:20,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 46 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:20,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:20,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 376 [2023-08-04 03:19:20,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:21,151 INFO L124 PetriNetUnfolderBase]: 6283/8385 cut-off events. [2023-08-04 03:19:21,151 INFO L125 PetriNetUnfolderBase]: For 990/990 co-relation queries the response was YES. [2023-08-04 03:19:21,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17108 conditions, 8385 events. 6283/8385 cut-off events. For 990/990 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36890 event pairs, 2637 based on Foata normal form. 0/5162 useless extension candidates. Maximal degree in co-relation 6497. Up to 8089 conditions per place. [2023-08-04 03:19:21,206 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 39 selfloop transitions, 2 changer transitions 2/49 dead transitions. [2023-08-04 03:19:21,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 228 flow [2023-08-04 03:19:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-04 03:19:21,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4530141843971631 [2023-08-04 03:19:21,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-04 03:19:21,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-04 03:19:21,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:21,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-04 03:19:21,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:21,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:21,214 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:21,214 INFO L175 Difference]: Start difference. First operand has 42 places, 46 transitions, 140 flow. Second operand 3 states and 511 transitions. [2023-08-04 03:19:21,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 228 flow [2023-08-04 03:19:21,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 49 transitions, 228 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:19:21,219 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 138 flow [2023-08-04 03:19:21,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-04 03:19:21,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 03:19:21,221 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 138 flow [2023-08-04 03:19:21,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:21,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:21,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:21,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:19:21,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:21,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1205108853, now seen corresponding path program 1 times [2023-08-04 03:19:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367711979] [2023-08-04 03:19:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:21,272 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 03:19:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367711979] [2023-08-04 03:19:21,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367711979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:21,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050909737] [2023-08-04 03:19:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:21,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:21,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:21,275 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 03:19:21,303 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 03:19:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:21,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:19:21,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:21,364 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 03:19:21,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050909737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:21,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:21,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:19:21,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870614858] [2023-08-04 03:19:21,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:21,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:21,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 376 [2023-08-04 03:19:21,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:21,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:21,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 376 [2023-08-04 03:19:21,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:21,985 INFO L124 PetriNetUnfolderBase]: 6311/8443 cut-off events. [2023-08-04 03:19:21,986 INFO L125 PetriNetUnfolderBase]: For 970/970 co-relation queries the response was YES. [2023-08-04 03:19:21,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17165 conditions, 8443 events. 6311/8443 cut-off events. For 970/970 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37589 event pairs, 2544 based on Foata normal form. 0/5201 useless extension candidates. Maximal degree in co-relation 17131. Up to 8042 conditions per place. [2023-08-04 03:19:22,029 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 45 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 03:19:22,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 250 flow [2023-08-04 03:19:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2023-08-04 03:19:22,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45656028368794327 [2023-08-04 03:19:22,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2023-08-04 03:19:22,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2023-08-04 03:19:22,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:22,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2023-08-04 03:19:22,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,035 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 138 flow. Second operand 3 states and 515 transitions. [2023-08-04 03:19:22,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 250 flow [2023-08-04 03:19:22,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:19:22,041 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 142 flow [2023-08-04 03:19:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-04 03:19:22,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2023-08-04 03:19:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 142 flow [2023-08-04 03:19:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:22,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:22,058 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 03:19:22,255 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 03:19:22,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:22,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:22,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1069919237, now seen corresponding path program 1 times [2023-08-04 03:19:22,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:22,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043978573] [2023-08-04 03:19:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:22,303 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 03:19:22,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043978573] [2023-08-04 03:19:22,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043978573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:22,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124057651] [2023-08-04 03:19:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:22,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:22,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:22,306 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 03:19:22,308 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 03:19:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:22,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:19:22,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:22,391 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 03:19:22,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:22,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124057651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:22,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:22,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:19:22,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930319065] [2023-08-04 03:19:22,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:22,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:22,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:22,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:22,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:22,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 376 [2023-08-04 03:19:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 376 [2023-08-04 03:19:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:22,927 INFO L124 PetriNetUnfolderBase]: 5464/7487 cut-off events. [2023-08-04 03:19:22,927 INFO L125 PetriNetUnfolderBase]: For 471/471 co-relation queries the response was YES. [2023-08-04 03:19:22,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15399 conditions, 7487 events. 5464/7487 cut-off events. For 471/471 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 34886 event pairs, 2097 based on Foata normal form. 0/4849 useless extension candidates. Maximal degree in co-relation 6900. Up to 5378 conditions per place. [2023-08-04 03:19:22,964 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 53 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 03:19:22,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 294 flow [2023-08-04 03:19:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 03:19:22,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-08-04 03:19:22,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 03:19:22,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 03:19:22,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:22,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 03:19:22,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,970 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 142 flow. Second operand 3 states and 522 transitions. [2023-08-04 03:19:22,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 294 flow [2023-08-04 03:19:22,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:22,973 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 152 flow [2023-08-04 03:19:22,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-08-04 03:19:22,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 03:19:22,973 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 152 flow [2023-08-04 03:19:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:22,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:22,974 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 03:19:22,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 03:19:23,183 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 03:19:23,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:23,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash 503602966, now seen corresponding path program 1 times [2023-08-04 03:19:23,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:23,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980407443] [2023-08-04 03:19:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:23,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:23,218 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 03:19:23,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:23,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980407443] [2023-08-04 03:19:23,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980407443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:23,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758064050] [2023-08-04 03:19:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:23,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:23,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:23,220 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 03:19:23,223 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 03:19:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:23,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:19:23,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:23,300 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 03:19:23,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:23,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758064050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:23,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:23,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:19:23,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296500330] [2023-08-04 03:19:23,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:23,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:23,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:23,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 376 [2023-08-04 03:19:23,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:23,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:23,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 376 [2023-08-04 03:19:23,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:23,761 INFO L124 PetriNetUnfolderBase]: 5393/7440 cut-off events. [2023-08-04 03:19:23,761 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2023-08-04 03:19:23,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15989 conditions, 7440 events. 5393/7440 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 34197 event pairs, 2312 based on Foata normal form. 0/5081 useless extension candidates. Maximal degree in co-relation 7495. Up to 5601 conditions per place. [2023-08-04 03:19:23,797 INFO L140 encePairwiseOnDemand]: 373/376 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 03:19:23,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 306 flow [2023-08-04 03:19:23,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 03:19:23,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627659574468085 [2023-08-04 03:19:23,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 03:19:23,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 03:19:23,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:23,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 03:19:23,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:23,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:23,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:23,803 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 152 flow. Second operand 3 states and 522 transitions. [2023-08-04 03:19:23,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 306 flow [2023-08-04 03:19:23,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:23,809 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 162 flow [2023-08-04 03:19:23,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-04 03:19:23,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2023-08-04 03:19:23,811 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 162 flow [2023-08-04 03:19:23,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:23,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:23,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:23,818 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 03:19:24,016 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 03:19:24,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:24,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1575713535, now seen corresponding path program 1 times [2023-08-04 03:19:24,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:24,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510346820] [2023-08-04 03:19:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:24,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:24,062 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 03:19:24,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510346820] [2023-08-04 03:19:24,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510346820] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:24,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702335593] [2023-08-04 03:19:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:24,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:24,064 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 03:19:24,066 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 03:19:24,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:24,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:19:24,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:24,170 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 03:19:24,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:24,189 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 03:19:24,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702335593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:24,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:24,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:19:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523485504] [2023-08-04 03:19:24,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:24,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:24,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:24,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:24,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:24,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 376 [2023-08-04 03:19:24,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:24,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:24,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 376 [2023-08-04 03:19:24,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:24,668 INFO L124 PetriNetUnfolderBase]: 4706/6455 cut-off events. [2023-08-04 03:19:24,669 INFO L125 PetriNetUnfolderBase]: For 1354/1354 co-relation queries the response was YES. [2023-08-04 03:19:24,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14115 conditions, 6455 events. 4706/6455 cut-off events. For 1354/1354 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28739 event pairs, 1637 based on Foata normal form. 2/4453 useless extension candidates. Maximal degree in co-relation 8936. Up to 6179 conditions per place. [2023-08-04 03:19:24,700 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 45 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 03:19:24,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 276 flow [2023-08-04 03:19:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 667 transitions. [2023-08-04 03:19:24,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4434840425531915 [2023-08-04 03:19:24,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 667 transitions. [2023-08-04 03:19:24,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 667 transitions. [2023-08-04 03:19:24,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:24,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 667 transitions. [2023-08-04 03:19:24,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.75) internal successors, (667), 4 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:24,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:24,707 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:24,707 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 162 flow. Second operand 4 states and 667 transitions. [2023-08-04 03:19:24,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 276 flow [2023-08-04 03:19:24,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:24,721 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 174 flow [2023-08-04 03:19:24,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-04 03:19:24,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2023-08-04 03:19:24,722 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 174 flow [2023-08-04 03:19:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 159.8) internal successors, (799), 5 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:24,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:24,723 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 03:19:24,729 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 03:19:24,927 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 03:19:24,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:24,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 828155397, now seen corresponding path program 1 times [2023-08-04 03:19:24,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:24,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314046434] [2023-08-04 03:19:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:24,984 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 03:19:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314046434] [2023-08-04 03:19:24,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314046434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348508406] [2023-08-04 03:19:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:24,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:24,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:24,986 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 03:19:24,989 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 03:19:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:25,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:19:25,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:25,083 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 03:19:25,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:25,102 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 03:19:25,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348508406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:25,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:25,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:19:25,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031686867] [2023-08-04 03:19:25,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:25,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:25,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:25,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 376 [2023-08-04 03:19:25,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:25,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:25,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 376 [2023-08-04 03:19:25,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:25,572 INFO L124 PetriNetUnfolderBase]: 4554/6283 cut-off events. [2023-08-04 03:19:25,573 INFO L125 PetriNetUnfolderBase]: For 667/667 co-relation queries the response was YES. [2023-08-04 03:19:25,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13626 conditions, 6283 events. 4554/6283 cut-off events. For 667/667 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28425 event pairs, 1057 based on Foata normal form. 16/4351 useless extension candidates. Maximal degree in co-relation 8511. Up to 5218 conditions per place. [2023-08-04 03:19:25,600 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 56 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 03:19:25,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 332 flow [2023-08-04 03:19:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 678 transitions. [2023-08-04 03:19:25,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507978723404255 [2023-08-04 03:19:25,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 678 transitions. [2023-08-04 03:19:25,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 678 transitions. [2023-08-04 03:19:25,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:25,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 678 transitions. [2023-08-04 03:19:25,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:25,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:25,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:25,607 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 174 flow. Second operand 4 states and 678 transitions. [2023-08-04 03:19:25,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 332 flow [2023-08-04 03:19:25,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 323 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:19:25,617 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 179 flow [2023-08-04 03:19:25,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2023-08-04 03:19:25,618 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2023-08-04 03:19:25,618 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 179 flow [2023-08-04 03:19:25,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.0) internal successors, (800), 5 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:25,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:25,618 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 03:19:25,623 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 03:19:25,823 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 03:19:25,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:25,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -33731220, now seen corresponding path program 1 times [2023-08-04 03:19:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:25,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776832852] [2023-08-04 03:19:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:25,878 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 03:19:25,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:25,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776832852] [2023-08-04 03:19:25,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776832852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:25,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822977753] [2023-08-04 03:19:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:25,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:25,880 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 03:19:25,883 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 03:19:25,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:25,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:19:25,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:25,985 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 03:19:25,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:26,003 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 03:19:26,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822977753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:26,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:26,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:19:26,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174859670] [2023-08-04 03:19:26,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:26,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:26,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:26,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 376 [2023-08-04 03:19:26,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:26,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 376 [2023-08-04 03:19:26,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:26,398 INFO L124 PetriNetUnfolderBase]: 3004/4197 cut-off events. [2023-08-04 03:19:26,398 INFO L125 PetriNetUnfolderBase]: For 1063/1063 co-relation queries the response was YES. [2023-08-04 03:19:26,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9162 conditions, 4197 events. 3004/4197 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17622 event pairs, 583 based on Foata normal form. 96/2991 useless extension candidates. Maximal degree in co-relation 7871. Up to 1527 conditions per place. [2023-08-04 03:19:26,418 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 63 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-08-04 03:19:26,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 374 flow [2023-08-04 03:19:26,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:26,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-04 03:19:26,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554521276595745 [2023-08-04 03:19:26,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-04 03:19:26,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-04 03:19:26,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:26,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-04 03:19:26,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,425 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,425 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 179 flow. Second operand 4 states and 685 transitions. [2023-08-04 03:19:26,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 374 flow [2023-08-04 03:19:26,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 364 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 03:19:26,433 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 190 flow [2023-08-04 03:19:26,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-04 03:19:26,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-08-04 03:19:26,435 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 190 flow [2023-08-04 03:19:26,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:26,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:26,444 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 03:19:26,641 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 03:19:26,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:26,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1159140152, now seen corresponding path program 1 times [2023-08-04 03:19:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:26,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066706455] [2023-08-04 03:19:26,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:26,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:26,698 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 03:19:26,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066706455] [2023-08-04 03:19:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066706455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:26,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636691996] [2023-08-04 03:19:26,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:26,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:26,700 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 03:19:26,702 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 03:19:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:26,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:19:26,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:26,807 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 03:19:26,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:26,821 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 03:19:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636691996] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:26,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:26,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:19:26,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510408842] [2023-08-04 03:19:26,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:19:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:26,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:19:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:19:26,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 376 [2023-08-04 03:19:26,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:26,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:26,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 376 [2023-08-04 03:19:26,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:27,211 INFO L124 PetriNetUnfolderBase]: 2990/4172 cut-off events. [2023-08-04 03:19:27,211 INFO L125 PetriNetUnfolderBase]: For 1888/1888 co-relation queries the response was YES. [2023-08-04 03:19:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9654 conditions, 4172 events. 2990/4172 cut-off events. For 1888/1888 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 17400 event pairs, 1487 based on Foata normal form. 13/2889 useless extension candidates. Maximal degree in co-relation 8370. Up to 3444 conditions per place. [2023-08-04 03:19:27,226 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 63 selfloop transitions, 3 changer transitions 2/74 dead transitions. [2023-08-04 03:19:27,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 386 flow [2023-08-04 03:19:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 685 transitions. [2023-08-04 03:19:27,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4554521276595745 [2023-08-04 03:19:27,229 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 685 transitions. [2023-08-04 03:19:27,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 685 transitions. [2023-08-04 03:19:27,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:27,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 685 transitions. [2023-08-04 03:19:27,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.25) internal successors, (685), 4 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:27,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:27,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:27,233 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 190 flow. Second operand 4 states and 685 transitions. [2023-08-04 03:19:27,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 386 flow [2023-08-04 03:19:27,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:27,241 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 194 flow [2023-08-04 03:19:27,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=194, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-04 03:19:27,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-04 03:19:27,242 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 194 flow [2023-08-04 03:19:27,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:27,242 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 03:19:27,249 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 03:19:27,447 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 03:19:27,447 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:27,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1643181017, now seen corresponding path program 1 times [2023-08-04 03:19:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:27,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489240029] [2023-08-04 03:19:27,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:27,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:27,549 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 03:19:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:27,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489240029] [2023-08-04 03:19:27,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489240029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:27,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:19:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709196596] [2023-08-04 03:19:27,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:27,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:19:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 376 [2023-08-04 03:19:27,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:27,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:27,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 376 [2023-08-04 03:19:27,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:28,151 INFO L124 PetriNetUnfolderBase]: 5536/7625 cut-off events. [2023-08-04 03:19:28,151 INFO L125 PetriNetUnfolderBase]: For 3118/3118 co-relation queries the response was YES. [2023-08-04 03:19:28,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17556 conditions, 7625 events. 5536/7625 cut-off events. For 3118/3118 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 35059 event pairs, 2666 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 17226. Up to 4190 conditions per place. [2023-08-04 03:19:28,173 INFO L140 encePairwiseOnDemand]: 372/376 looper letters, 73 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 03:19:28,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 510 flow [2023-08-04 03:19:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2023-08-04 03:19:28,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4849290780141844 [2023-08-04 03:19:28,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2023-08-04 03:19:28,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2023-08-04 03:19:28,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:28,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2023-08-04 03:19:28,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,182 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 194 flow. Second operand 3 states and 547 transitions. [2023-08-04 03:19:28,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 510 flow [2023-08-04 03:19:28,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 494 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 03:19:28,209 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 205 flow [2023-08-04 03:19:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=186, 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=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-04 03:19:28,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2023-08-04 03:19:28,210 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 205 flow [2023-08-04 03:19:28,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:28,211 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 03:19:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 03:19:28,211 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:28,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:28,211 INFO L85 PathProgramCache]: Analyzing trace with hash -266464431, now seen corresponding path program 1 times [2023-08-04 03:19:28,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:28,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878370593] [2023-08-04 03:19:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:19:28,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:28,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878370593] [2023-08-04 03:19:28,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878370593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:28,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:19:28,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:19:28,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861241241] [2023-08-04 03:19:28,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:28,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:19:28,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:28,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:19:28,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:19:28,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 376 [2023-08-04 03:19:28,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 205 flow. Second operand has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:28,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 376 [2023-08-04 03:19:28,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:28,954 INFO L124 PetriNetUnfolderBase]: 6443/8868 cut-off events. [2023-08-04 03:19:28,954 INFO L125 PetriNetUnfolderBase]: For 5287/5287 co-relation queries the response was YES. [2023-08-04 03:19:28,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22279 conditions, 8868 events. 6443/8868 cut-off events. For 5287/5287 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 44269 event pairs, 1430 based on Foata normal form. 395/7823 useless extension candidates. Maximal degree in co-relation 21824. Up to 7080 conditions per place. [2023-08-04 03:19:28,983 INFO L140 encePairwiseOnDemand]: 371/376 looper letters, 62 selfloop transitions, 3 changer transitions 6/77 dead transitions. [2023-08-04 03:19:28,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 463 flow [2023-08-04 03:19:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:19:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:19:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-08-04 03:19:28,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46631205673758863 [2023-08-04 03:19:28,985 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-08-04 03:19:28,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-08-04 03:19:28,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:28,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-08-04 03:19:28,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 376.0) internal successors, (1504), 4 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:28,989 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 205 flow. Second operand 3 states and 526 transitions. [2023-08-04 03:19:28,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 463 flow [2023-08-04 03:19:29,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:29,005 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 223 flow [2023-08-04 03:19:29,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=223, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-04 03:19:29,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2023-08-04 03:19:29,006 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 223 flow [2023-08-04 03:19:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:29,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:29,006 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:29,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 03:19:29,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:29,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:29,007 INFO L85 PathProgramCache]: Analyzing trace with hash -219823445, now seen corresponding path program 1 times [2023-08-04 03:19:29,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:29,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880194333] [2023-08-04 03:19:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:29,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 03:19:29,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880194333] [2023-08-04 03:19:29,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880194333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:29,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931885087] [2023-08-04 03:19:29,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:29,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:29,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:29,246 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 03:19:29,248 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 03:19:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:29,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 03:19:29,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 03:19:29,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:19:29,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931885087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:19:29,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:19:29,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:19:29,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936020084] [2023-08-04 03:19:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:19:29,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 03:19:29,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 03:19:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:19:29,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 376 [2023-08-04 03:19:29,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:29,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:29,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 376 [2023-08-04 03:19:29,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:30,331 INFO L124 PetriNetUnfolderBase]: 7933/11632 cut-off events. [2023-08-04 03:19:30,331 INFO L125 PetriNetUnfolderBase]: For 8146/8146 co-relation queries the response was YES. [2023-08-04 03:19:30,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30108 conditions, 11632 events. 7933/11632 cut-off events. For 8146/8146 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 65580 event pairs, 5299 based on Foata normal form. 290/10289 useless extension candidates. Maximal degree in co-relation 29428. Up to 8526 conditions per place. [2023-08-04 03:19:30,359 INFO L140 encePairwiseOnDemand]: 370/376 looper letters, 44 selfloop transitions, 2 changer transitions 35/87 dead transitions. [2023-08-04 03:19:30,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 550 flow [2023-08-04 03:19:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:19:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:19:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 687 transitions. [2023-08-04 03:19:30,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.456781914893617 [2023-08-04 03:19:30,362 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 687 transitions. [2023-08-04 03:19:30,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 687 transitions. [2023-08-04 03:19:30,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:30,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 687 transitions. [2023-08-04 03:19:30,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 171.75) internal successors, (687), 4 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:30,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:30,367 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:30,367 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 223 flow. Second operand 4 states and 687 transitions. [2023-08-04 03:19:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 550 flow [2023-08-04 03:19:30,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:19:30,411 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 238 flow [2023-08-04 03:19:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2023-08-04 03:19:30,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2023-08-04 03:19:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 238 flow [2023-08-04 03:19:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:19:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:19:30,421 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 03:19:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 03:19:30,617 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:19:30,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:19:30,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1305993222, now seen corresponding path program 1 times [2023-08-04 03:19:30,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:19:30,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939220996] [2023-08-04 03:19:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:30,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:19:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 03:19:31,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:19:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939220996] [2023-08-04 03:19:31,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939220996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:19:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064745702] [2023-08-04 03:19:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:19:31,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:19:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:19:31,646 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 03:19:31,648 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 03:19:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:19:31,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-04 03:19:31,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:19:31,837 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 03:19:31,913 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 03:19:31,955 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 03:19:32,021 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 03:19:32,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-04 03:19:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 03:19:32,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:19:32,688 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse4 (= (mod |c_thread2Thread1of2ForFork0_~b~0#1| 256) 0))) (let ((.cse2 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse1 (+ c_~queue~0.offset (* c_~back~0 4))) (.cse6 (not .cse4)) (.cse3 (<= (+ c_~back~0 1) c_~front~0))) (and (or (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (select .cse0 .cse1) 1)) (<= (+ c_~sum~0 (select .cse0 .cse2)) 1)))) .cse3 .cse4) (or (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (+ (select .cse5 .cse1) 1) 0)) (<= (+ c_~sum~0 (select .cse5 .cse2)) 1)))) .cse6 .cse3) (or .cse3 (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (<= 0 (+ c_~sum~0 (select .cse7 .cse2))) (not (= (select .cse7 .cse1) 1))))) .cse4) (or (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (<= 0 (+ c_~sum~0 (select .cse8 .cse2))) (not (= (+ (select .cse8 .cse1) 1) 0))))) .cse6 .cse3)))) (<= c_~n~0 c_~front~0) (< c_~front~0 0)) is different from false [2023-08-04 03:19:33,322 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (let ((.cse1 (+ c_~queue~0.offset (* c_~back~0 4))) (.cse2 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse3 (<= (+ c_~back~0 1) c_~front~0))) (and (or (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_449 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (select .cse0 .cse1) 1)) (<= 0 (+ c_~sum~0 (select .cse0 .cse2)))))) .cse3) (or (forall ((v_ArrVal_447 (Array Int Int)) (v_ArrVal_449 (Array Int Int))) (let ((.cse4 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_447) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (select .cse4 .cse1) 1)) (<= (+ c_~sum~0 (select .cse4 .cse2)) 1)))) .cse3))) (< c_~front~0 0)) is different from false [2023-08-04 03:19:33,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:19:33,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 03:19:33,629 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:19:33,629 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 316 treesize of output 292 [2023-08-04 03:19:33,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:19:33,656 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 96 treesize of output 92 [2023-08-04 03:19:33,669 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:19:33,669 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 95 treesize of output 79 [2023-08-04 03:19:33,870 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:19:33,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 03:19:33,887 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:19:33,888 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 316 treesize of output 288 [2023-08-04 03:19:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:19:33,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-04 03:19:33,919 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:19:33,920 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 95 treesize of output 75 [2023-08-04 03:19:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 10 not checked. [2023-08-04 03:19:34,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064745702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:19:34,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:19:34,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-04 03:19:34,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525707620] [2023-08-04 03:19:34,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:19:34,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 03:19:34,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:19:34,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 03:19:34,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=404, Unknown=9, NotChecked=86, Total=600 [2023-08-04 03:19:34,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 376 [2023-08-04 03:19:34,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 238 flow. Second operand has 25 states, 25 states have (on average 119.6) internal successors, (2990), 25 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:34,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:19:34,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 376 [2023-08-04 03:19:34,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:19:41,059 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (let ((.cse4 (+ c_~queue~0.offset .cse0)) (.cse1 (* c_~back~0 4)) (.cse7 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|))) (and (<= c_~sum~0 0) (= c_~n~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n~0 1) (<= .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (= (+ c_~front~0 1) c_~back~0) (<= 0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (<= 0 c_~sum~0) (or (let ((.cse5 (<= (+ c_~back~0 1) c_~front~0)) (.cse3 (+ c_~queue~0.offset .cse1))) (and (or (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (select .cse2 .cse3) 1)) (<= (+ c_~sum~0 (select .cse2 .cse4)) 1)))) .cse5) (or .cse5 (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (<= 0 (+ c_~sum~0 (select .cse6 .cse4))) (not (= (select .cse6 .cse3) 1)))))))) (<= c_~n~0 c_~front~0) (< c_~front~0 0)) (= (select (select |c_#memory_int| c_~queue~0.base) .cse4) 1) (<= (+ .cse0 .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ .cse1 4)) (= c_~sum~0 0) (<= (+ .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4)))) is different from false [2023-08-04 03:19:41,573 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_int| c_~queue~0.base)) (.cse9 (+ c_~queue~0.offset (* c_~front~0 4)))) (let ((.cse6 (let ((.cse11 (+ c_~sum~0 (select .cse4 .cse9)))) (and (<= .cse11 1) (<= 0 .cse11)))) (.cse1 (<= (+ c_~back~0 1) c_~front~0)) (.cse5 (+ c_~queue~0.offset (* c_~back~0 4))) (.cse0 (<= c_~n~0 c_~front~0)) (.cse7 (< c_~front~0 0))) (and (or .cse0 (let ((.cse2 (= (mod |c_thread2Thread1of2ForFork0_~b~0#1| 256) 0)) (.cse3 (select .cse4 .cse5))) (and (or .cse1 .cse2 (not (= .cse3 1))) (or (not .cse2) .cse1 (not (= (+ .cse3 1) 0))))) .cse6 .cse7) (<= 1 c_~sum~0) (or .cse0 (<= c_~back~0 c_~front~0) .cse6 .cse7) (or (and (or (<= 0 (+ c_~sum~0 1)) .cse1) (or (and (<= c_~sum~0 0) (= c_~back~0 c_~front~0)) .cse1)) (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 .cse7) (or (and (or (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (not (= (select .cse8 .cse5) 1)) (<= (+ c_~sum~0 (select .cse8 .cse9)) 1)))) .cse1) (or .cse1 (forall ((v_ArrVal_449 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base))) (or (<= 0 (+ c_~sum~0 (select .cse10 .cse9))) (not (= (select .cse10 .cse5) 1))))))) .cse0 .cse7) (<= c_~sum~0 1)))) is different from false [2023-08-04 03:19:52,763 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 58 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 03:19:59,478 INFO L124 PetriNetUnfolderBase]: 42459/59865 cut-off events. [2023-08-04 03:19:59,478 INFO L125 PetriNetUnfolderBase]: For 54961/54963 co-relation queries the response was YES. [2023-08-04 03:19:59,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165520 conditions, 59865 events. 42459/59865 cut-off events. For 54961/54963 co-relation queries the response was YES. Maximal size of possible extension queue 1786. Compared 392274 event pairs, 6308 based on Foata normal form. 3/56009 useless extension candidates. Maximal degree in co-relation 165494. Up to 10882 conditions per place. [2023-08-04 03:19:59,748 INFO L140 encePairwiseOnDemand]: 342/376 looper letters, 551 selfloop transitions, 177 changer transitions 75/808 dead transitions. [2023-08-04 03:19:59,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 808 transitions, 5225 flow [2023-08-04 03:19:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-04 03:19:59,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-04 03:19:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4909 transitions. [2023-08-04 03:19:59,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36266252955082745 [2023-08-04 03:19:59,760 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4909 transitions. [2023-08-04 03:19:59,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4909 transitions. [2023-08-04 03:19:59,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:19:59,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4909 transitions. [2023-08-04 03:19:59,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 136.36111111111111) internal successors, (4909), 36 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:59,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 376.0) internal successors, (13912), 37 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:59,793 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 376.0) internal successors, (13912), 37 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:19:59,793 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 238 flow. Second operand 36 states and 4909 transitions. [2023-08-04 03:19:59,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 808 transitions, 5225 flow [2023-08-04 03:20:00,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 808 transitions, 5221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 03:20:00,287 INFO L231 Difference]: Finished difference. Result has 116 places, 237 transitions, 1941 flow [2023-08-04 03:20:00,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1941, PETRI_PLACES=116, PETRI_TRANSITIONS=237} [2023-08-04 03:20:00,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2023-08-04 03:20:00,288 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 237 transitions, 1941 flow [2023-08-04 03:20:00,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 119.6) internal successors, (2990), 25 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:00,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:00,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:00,297 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 03:20:00,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 03:20:00,492 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:00,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1764997702, now seen corresponding path program 1 times [2023-08-04 03:20:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164001261] [2023-08-04 03:20:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:00,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 03:20:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164001261] [2023-08-04 03:20:01,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164001261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481452049] [2023-08-04 03:20:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:01,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:01,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:01,194 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 03:20:01,196 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 03:20:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:01,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-04 03:20:01,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:01,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:20:01,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:02,088 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:02,089 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 156 treesize of output 116 [2023-08-04 03:20:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:20:03,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481452049] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:03,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-08-04 03:20:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322090850] [2023-08-04 03:20:03,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-04 03:20:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:03,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-04 03:20:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2023-08-04 03:20:04,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 376 [2023-08-04 03:20:04,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 237 transitions, 1941 flow. Second operand has 23 states, 23 states have (on average 126.73913043478261) internal successors, (2915), 23 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:04,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:04,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 376 [2023-08-04 03:20:04,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:20:20,436 INFO L124 PetriNetUnfolderBase]: 65554/93051 cut-off events. [2023-08-04 03:20:20,436 INFO L125 PetriNetUnfolderBase]: For 542607/543599 co-relation queries the response was YES. [2023-08-04 03:20:21,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569404 conditions, 93051 events. 65554/93051 cut-off events. For 542607/543599 co-relation queries the response was YES. Maximal size of possible extension queue 2871. Compared 652948 event pairs, 5329 based on Foata normal form. 3654/96625 useless extension candidates. Maximal degree in co-relation 569352. Up to 64031 conditions per place. [2023-08-04 03:20:21,294 INFO L140 encePairwiseOnDemand]: 354/376 looper letters, 632 selfloop transitions, 632 changer transitions 221/1488 dead transitions. [2023-08-04 03:20:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 1488 transitions, 16351 flow [2023-08-04 03:20:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-04 03:20:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-04 03:20:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 9743 transitions. [2023-08-04 03:20:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35496211017196155 [2023-08-04 03:20:21,309 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 9743 transitions. [2023-08-04 03:20:21,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 9743 transitions. [2023-08-04 03:20:21,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:20:21,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 9743 transitions. [2023-08-04 03:20:21,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 133.46575342465752) internal successors, (9743), 73 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:21,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 376.0) internal successors, (27824), 74 states have internal predecessors, (27824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:21,369 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 376.0) internal successors, (27824), 74 states have internal predecessors, (27824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:21,369 INFO L175 Difference]: Start difference. First operand has 116 places, 237 transitions, 1941 flow. Second operand 73 states and 9743 transitions. [2023-08-04 03:20:21,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 1488 transitions, 16351 flow [2023-08-04 03:20:25,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 1488 transitions, 15381 flow, removed 483 selfloop flow, removed 3 redundant places. [2023-08-04 03:20:25,204 INFO L231 Difference]: Finished difference. Result has 217 places, 799 transitions, 7987 flow [2023-08-04 03:20:25,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=7987, PETRI_PLACES=217, PETRI_TRANSITIONS=799} [2023-08-04 03:20:25,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2023-08-04 03:20:25,204 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 799 transitions, 7987 flow [2023-08-04 03:20:25,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 126.73913043478261) internal successors, (2915), 23 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:25,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:20:25,205 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:20:25,210 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 03:20:25,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 03:20:25,406 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:20:25,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:20:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1742151541, now seen corresponding path program 1 times [2023-08-04 03:20:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:20:25,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110691508] [2023-08-04 03:20:25,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:25,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:20:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:20:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:20:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110691508] [2023-08-04 03:20:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110691508] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:20:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438729550] [2023-08-04 03:20:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:20:26,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:20:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:20:26,012 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 03:20:26,016 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 03:20:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:20:26,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-04 03:20:26,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:20:26,193 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 03:20:26,255 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 03:20:26,310 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 03:20:26,386 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 03:20:26,436 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 03:20:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 03:20:26,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:20:27,955 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~front~0) (<= (+ c_~back~0 1) c_~front~0) (< c_~front~0 0) (let ((.cse1 (+ c_~queue~0.offset (* c_~back~0 4))) (.cse2 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_529 (Array Int Int)) (v_ArrVal_531 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_529) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_531) c_~queue~0.base))) (or (not (= (select .cse0 .cse1) 1)) (<= (+ c_~sum~0 (select .cse0 .cse2)) 1)))) (forall ((v_ArrVal_529 (Array Int Int)) (v_ArrVal_531 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_529) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_531) c_~queue~0.base))) (or (not (= (select .cse3 .cse1) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse2))))))))) is different from false [2023-08-04 03:20:28,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 03:20:28,170 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 140 [2023-08-04 03:20:28,190 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,190 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 101 treesize of output 97 [2023-08-04 03:20:28,202 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,202 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 120 treesize of output 104 [2023-08-04 03:20:28,462 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:20:28,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-04 03:20:28,473 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:20:28,474 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 316 treesize of output 288 [2023-08-04 03:20:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:20:28,490 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-04 03:20:28,507 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 03:20:28,507 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 95 treesize of output 75 [2023-08-04 03:20:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-08-04 03:20:28,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438729550] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:20:28,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:20:28,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-04 03:20:28,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462830125] [2023-08-04 03:20:28,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:20:28,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 03:20:28,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:20:28,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 03:20:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=495, Unknown=3, NotChecked=46, Total=650 [2023-08-04 03:20:28,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 376 [2023-08-04 03:20:28,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 799 transitions, 7987 flow. Second operand has 26 states, 26 states have (on average 105.5) internal successors, (2743), 26 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:20:28,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:20:28,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 376 [2023-08-04 03:20:28,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:21:25,558 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 63 DAG size of output: 56 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 03:21:34,612 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 81 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 03:21:42,297 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-04 03:21:52,470 INFO L124 PetriNetUnfolderBase]: 101266/142183 cut-off events. [2023-08-04 03:21:52,470 INFO L125 PetriNetUnfolderBase]: For 1134279/1135083 co-relation queries the response was YES. [2023-08-04 03:21:54,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905984 conditions, 142183 events. 101266/142183 cut-off events. For 1134279/1135083 co-relation queries the response was YES. Maximal size of possible extension queue 3446. Compared 975227 event pairs, 4854 based on Foata normal form. 575/142508 useless extension candidates. Maximal degree in co-relation 905134. Up to 90739 conditions per place. [2023-08-04 03:21:54,682 INFO L140 encePairwiseOnDemand]: 353/376 looper letters, 1479 selfloop transitions, 791 changer transitions 216/2512 dead transitions. [2023-08-04 03:21:54,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 2512 transitions, 30193 flow [2023-08-04 03:21:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-08-04 03:21:54,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-08-04 03:21:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 12297 transitions. [2023-08-04 03:21:54,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29731624758220504 [2023-08-04 03:21:54,698 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 12297 transitions. [2023-08-04 03:21:54,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 12297 transitions. [2023-08-04 03:21:54,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:21:54,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 12297 transitions. [2023-08-04 03:21:54,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 111.7909090909091) internal successors, (12297), 110 states have internal predecessors, (12297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:21:54,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 376.0) internal successors, (41736), 111 states have internal predecessors, (41736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:21:54,757 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 376.0) internal successors, (41736), 111 states have internal predecessors, (41736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:21:54,758 INFO L175 Difference]: Start difference. First operand has 217 places, 799 transitions, 7987 flow. Second operand 110 states and 12297 transitions. [2023-08-04 03:21:54,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 2512 transitions, 30193 flow [2023-08-04 03:22:28,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 2512 transitions, 29239 flow, removed 381 selfloop flow, removed 9 redundant places. [2023-08-04 03:22:28,311 INFO L231 Difference]: Finished difference. Result has 354 places, 1326 transitions, 14695 flow [2023-08-04 03:22:28,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=14695, PETRI_PLACES=354, PETRI_TRANSITIONS=1326} [2023-08-04 03:22:28,312 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2023-08-04 03:22:28,312 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1326 transitions, 14695 flow [2023-08-04 03:22:28,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.5) internal successors, (2743), 26 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:22:28,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:22:28,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:22:28,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 03:22:28,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:22:28,514 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:22:28,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:22:28,514 INFO L85 PathProgramCache]: Analyzing trace with hash 641250664, now seen corresponding path program 2 times [2023-08-04 03:22:28,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:22:28,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054265415] [2023-08-04 03:22:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:22:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:22:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:22:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:22:28,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:22:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054265415] [2023-08-04 03:22:28,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054265415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:22:28,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790246622] [2023-08-04 03:22:28,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 03:22:28,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:22:28,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:22:28,639 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 03:22:28,642 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 03:22:28,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 03:22:28,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 03:22:28,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 03:22:28,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:22:28,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-08-04 03:22:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:22:28,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:22:28,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-08-04 03:22:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 03:22:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790246622] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:22:29,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:22:29,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-08-04 03:22:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962342067] [2023-08-04 03:22:29,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:22:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 03:22:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:22:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 03:22:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-04 03:22:29,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 376 [2023-08-04 03:22:29,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1326 transitions, 14695 flow. Second operand has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:22:29,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:22:29,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 376 [2023-08-04 03:22:29,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:23:11,509 INFO L124 PetriNetUnfolderBase]: 113555/162720 cut-off events. [2023-08-04 03:23:11,509 INFO L125 PetriNetUnfolderBase]: For 1544693/1548234 co-relation queries the response was YES. [2023-08-04 03:23:14,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1119154 conditions, 162720 events. 113555/162720 cut-off events. For 1544693/1548234 co-relation queries the response was YES. Maximal size of possible extension queue 4073. Compared 1202997 event pairs, 25223 based on Foata normal form. 2801/164828 useless extension candidates. Maximal degree in co-relation 1118101. Up to 109048 conditions per place. [2023-08-04 03:23:15,538 INFO L140 encePairwiseOnDemand]: 371/376 looper letters, 821 selfloop transitions, 657 changer transitions 12/1577 dead transitions. [2023-08-04 03:23:15,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1577 transitions, 20808 flow [2023-08-04 03:23:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:23:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:23:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 717 transitions. [2023-08-04 03:23:15,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767287234042553 [2023-08-04 03:23:15,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 717 transitions. [2023-08-04 03:23:15,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 717 transitions. [2023-08-04 03:23:15,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:23:15,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 717 transitions. [2023-08-04 03:23:15,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 179.25) internal successors, (717), 4 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:15,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:15,542 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 376.0) internal successors, (1880), 5 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:23:15,542 INFO L175 Difference]: Start difference. First operand has 354 places, 1326 transitions, 14695 flow. Second operand 4 states and 717 transitions. [2023-08-04 03:23:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1577 transitions, 20808 flow [2023-08-04 03:24:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1577 transitions, 20169 flow, removed 234 selfloop flow, removed 16 redundant places. [2023-08-04 03:24:20,388 INFO L231 Difference]: Finished difference. Result has 343 places, 1467 transitions, 18352 flow [2023-08-04 03:24:20,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=376, PETRI_DIFFERENCE_MINUEND_FLOW=13866, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=509, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=18352, PETRI_PLACES=343, PETRI_TRANSITIONS=1467} [2023-08-04 03:24:20,389 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2023-08-04 03:24:20,389 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1467 transitions, 18352 flow [2023-08-04 03:24:20,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 163.28571428571428) internal successors, (1143), 7 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:20,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:24:20,390 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:24:20,396 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 03:24:20,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:24:20,595 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:24:20,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:24:20,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1206810510, now seen corresponding path program 1 times [2023-08-04 03:24:20,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:24:20,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535366028] [2023-08-04 03:24:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:24:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:24:21,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:24:21,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535366028] [2023-08-04 03:24:21,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535366028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:24:21,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828539331] [2023-08-04 03:24:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:24:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:24:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:24:21,042 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 03:24:21,050 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 03:24:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:24:21,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 03:24:21,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:24:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 03:24:21,378 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 03:24:21,446 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 03:24:21,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:24:21,613 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 03:24:21,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-08-04 03:24:21,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-08-04 03:24:21,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-08-04 03:24:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 03:24:21,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828539331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:24:21,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:24:21,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 18 [2023-08-04 03:24:21,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097685824] [2023-08-04 03:24:21,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:24:21,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 03:24:21,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:24:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 03:24:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=298, Unknown=8, NotChecked=0, Total=380 [2023-08-04 03:24:22,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 376 [2023-08-04 03:24:22,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1467 transitions, 18352 flow. Second operand has 20 states, 20 states have (on average 131.35) internal successors, (2627), 20 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 03:24:22,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:24:22,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 376 [2023-08-04 03:24:22,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand