/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:17:24,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:17:24,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:17:24,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:17:24,328 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:17:24,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:17:24,359 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:17:24,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:17:24,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:17:24,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:17:24,360 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:17:24,361 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:17:24,361 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:17:24,361 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:17:24,362 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:17:24,362 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:17:24,362 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:17:24,363 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:17:24,363 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:17:24,363 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:17:24,364 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:17:24,369 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:17:24,369 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:17:24,370 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:17:24,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:17:24,370 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:17:24,370 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:17:24,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:17:24,371 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:17:24,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:17:24,372 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:17:24,372 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:17:24,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:17:24,373 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:17:24,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:17:24,373 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:17:24,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:17:24,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:17:24,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:17:24,731 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:17:24,733 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:17:24,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2023-08-26 12:17:25,968 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:17:26,239 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:17:26,240 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_power.opt.i [2023-08-26 12:17:26,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7a1c4b56/019944406512401e8f1bc14b2e3e0170/FLAG3774f8993 [2023-08-26 12:17:26,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7a1c4b56/019944406512401e8f1bc14b2e3e0170 [2023-08-26 12:17:26,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:17:26,276 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:17:26,277 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:17:26,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:17:26,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:17:26,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8b0795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26, skipping insertion in model container [2023-08-26 12:17:26,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,337 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:17:26,714 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:17:26,725 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:17:26,755 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:17:26,756 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:17:26,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:17:26,848 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:17:26,848 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:17:26,854 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:17:26,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26 WrapperNode [2023-08-26 12:17:26,855 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:17:26,856 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:17:26,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:17:26,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:17:26,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,935 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 201 [2023-08-26 12:17:26,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:17:26,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:17:26,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:17:26,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:17:26,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,978 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:26,995 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:27,001 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:17:27,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:17:27,009 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:17:27,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:17:27,010 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (1/1) ... [2023-08-26 12:17:27,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:17:27,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:17:27,043 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) [2023-08-26 12:17:27,057 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 [2023-08-26 12:17:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:17:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:17:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:17:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:17:27,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:17:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:17:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:17:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:17:27,083 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:17:27,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:17:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:17:27,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:17:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 12:17:27,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 12:17:27,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:17:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:17:27,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:17:27,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:17:27,087 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:17:27,273 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:17:27,275 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:17:27,834 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:17:28,506 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:17:28,507 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:17:28,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:17:28 BoogieIcfgContainer [2023-08-26 12:17:28,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:17:28,511 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:17:28,511 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:17:28,514 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:17:28,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:17:26" (1/3) ... [2023-08-26 12:17:28,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181b0efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:17:28, skipping insertion in model container [2023-08-26 12:17:28,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:17:26" (2/3) ... [2023-08-26 12:17:28,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@181b0efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:17:28, skipping insertion in model container [2023-08-26 12:17:28,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:17:28" (3/3) ... [2023-08-26 12:17:28,517 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_power.opt.i [2023-08-26 12:17:28,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:17:28,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-08-26 12:17:28,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:17:28,675 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:17:28,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 204 transitions, 428 flow [2023-08-26 12:17:28,777 INFO L124 PetriNetUnfolderBase]: 3/200 cut-off events. [2023-08-26 12:17:28,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:17:28,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 3/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 337 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2023-08-26 12:17:28,784 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 204 transitions, 428 flow [2023-08-26 12:17:28,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 200 transitions, 412 flow [2023-08-26 12:17:28,793 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:17:28,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 200 transitions, 412 flow [2023-08-26 12:17:28,803 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 200 transitions, 412 flow [2023-08-26 12:17:28,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 200 transitions, 412 flow [2023-08-26 12:17:28,851 INFO L124 PetriNetUnfolderBase]: 3/200 cut-off events. [2023-08-26 12:17:28,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:17:28,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 200 events. 3/200 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 336 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2023-08-26 12:17:28,858 INFO L119 LiptonReduction]: Number of co-enabled transitions 10348 [2023-08-26 12:17:38,526 INFO L134 LiptonReduction]: Checked pairs total: 56087 [2023-08-26 12:17:38,526 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-26 12:17:38,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:17:38,543 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=false, 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;@1cd31885, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:17:38,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-08-26 12:17:38,545 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:17:38,545 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:17:38,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:17:38,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:17:38,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:17:38,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:17:38,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:17:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1350, now seen corresponding path program 1 times [2023-08-26 12:17:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:17:38,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254008858] [2023-08-26 12:17:38,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:17:38,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:17:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:17:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:17:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:17:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254008858] [2023-08-26 12:17:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254008858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:17:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:17:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:17:38,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778075693] [2023-08-26 12:17:38,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:17:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:17:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:17:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:17:38,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:17:38,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 378 [2023-08-26 12:17:38,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 190 flow. Second operand has 2 states, 2 states have (on average 141.5) internal successors, (283), 2 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:17:38,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:17:38,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 378 [2023-08-26 12:17:38,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:13,258 INFO L124 PetriNetUnfolderBase]: 241951/312926 cut-off events. [2023-08-26 12:18:13,258 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 12:18:13,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627006 conditions, 312926 events. 241951/312926 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 18071. Compared 2124919 event pairs, 241951 based on Foata normal form. 4320/142598 useless extension candidates. Maximal degree in co-relation 626994. Up to 312873 conditions per place. [2023-08-26 12:18:15,196 INFO L140 encePairwiseOnDemand]: 345/378 looper letters, 55 selfloop transitions, 0 changer transitions 0/56 dead transitions. [2023-08-26 12:18:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 234 flow [2023-08-26 12:18:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:18:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:18:15,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2023-08-26 12:18:15,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2023-08-26 12:18:15,207 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2023-08-26 12:18:15,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2023-08-26 12:18:15,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:15,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2023-08-26 12:18:15,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:15,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:15,220 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:15,221 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 190 flow. Second operand 2 states and 370 transitions. [2023-08-26 12:18:15,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 234 flow [2023-08-26 12:18:15,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:18:15,330 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 120 flow [2023-08-26 12:18:15,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=120, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-26 12:18:15,334 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -35 predicate places. [2023-08-26 12:18:15,334 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 120 flow [2023-08-26 12:18:15,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 141.5) internal successors, (283), 2 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:15,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:15,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:18:15,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:18:15,336 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:15,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash 41292361, now seen corresponding path program 1 times [2023-08-26 12:18:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:15,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134631157] [2023-08-26 12:18:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:15,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134631157] [2023-08-26 12:18:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134631157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:15,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:15,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:18:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025251270] [2023-08-26 12:18:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:15,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:18:15,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:15,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:18:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:18:15,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 378 [2023-08-26 12:18:15,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:15,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:15,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 378 [2023-08-26 12:18:15,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:34,573 INFO L124 PetriNetUnfolderBase]: 139581/187668 cut-off events. [2023-08-26 12:18:34,573 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:18:34,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374580 conditions, 187668 events. 139581/187668 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9058. Compared 1317337 event pairs, 87485 based on Foata normal form. 0/109087 useless extension candidates. Maximal degree in co-relation 374577. Up to 111451 conditions per place. [2023-08-26 12:18:35,616 INFO L140 encePairwiseOnDemand]: 358/378 looper letters, 67 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2023-08-26 12:18:35,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 318 flow [2023-08-26 12:18:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:18:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:18:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-26 12:18:35,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2023-08-26 12:18:35,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-26 12:18:35,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-26 12:18:35,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:35,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-26 12:18:35,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:35,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:35,627 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 120 flow. Second operand 3 states and 444 transitions. [2023-08-26 12:18:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 318 flow [2023-08-26 12:18:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:18:35,629 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 204 flow [2023-08-26 12:18:35,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-08-26 12:18:35,630 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -33 predicate places. [2023-08-26 12:18:35,631 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 204 flow [2023-08-26 12:18:35,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:35,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:35,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:18:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:18:35,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:35,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash 41292362, now seen corresponding path program 1 times [2023-08-26 12:18:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:35,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689675462] [2023-08-26 12:18:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:35,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689675462] [2023-08-26 12:18:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689675462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:35,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:35,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:18:35,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107824847] [2023-08-26 12:18:35,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:18:35,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:18:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:18:35,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 378 [2023-08-26 12:18:35,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:35,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:35,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 378 [2023-08-26 12:18:35,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:41,663 INFO L124 PetriNetUnfolderBase]: 35859/50112 cut-off events. [2023-08-26 12:18:41,664 INFO L125 PetriNetUnfolderBase]: For 14525/14525 co-relation queries the response was YES. [2023-08-26 12:18:41,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135993 conditions, 50112 events. 35859/50112 cut-off events. For 14525/14525 co-relation queries the response was YES. Maximal size of possible extension queue 2639. Compared 325991 event pairs, 28485 based on Foata normal form. 11670/55762 useless extension candidates. Maximal degree in co-relation 135988. Up to 49532 conditions per place. [2023-08-26 12:18:41,905 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 50 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-26 12:18:41,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 286 flow [2023-08-26 12:18:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:18:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:18:41,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 12:18:41,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3747795414462081 [2023-08-26 12:18:41,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 12:18:41,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 12:18:41,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:41,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 12:18:41,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:41,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:41,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:41,911 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 204 flow. Second operand 3 states and 425 transitions. [2023-08-26 12:18:41,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 286 flow [2023-08-26 12:18:42,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:18:42,012 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 166 flow [2023-08-26 12:18:42,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-26 12:18:42,013 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -43 predicate places. [2023-08-26 12:18:42,013 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 166 flow [2023-08-26 12:18:42,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:42,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:42,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:18:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:18:42,014 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:42,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1029602130, now seen corresponding path program 1 times [2023-08-26 12:18:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:42,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913388466] [2023-08-26 12:18:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:42,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:42,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:42,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913388466] [2023-08-26 12:18:42,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913388466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:42,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:42,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:18:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316699176] [2023-08-26 12:18:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:42,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:18:42,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:18:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:18:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 378 [2023-08-26 12:18:42,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:42,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:42,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 378 [2023-08-26 12:18:42,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:46,763 INFO L124 PetriNetUnfolderBase]: 29834/41691 cut-off events. [2023-08-26 12:18:46,763 INFO L125 PetriNetUnfolderBase]: For 6082/6082 co-relation queries the response was YES. [2023-08-26 12:18:46,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107286 conditions, 41691 events. 29834/41691 cut-off events. For 6082/6082 co-relation queries the response was YES. Maximal size of possible extension queue 2225. Compared 273300 event pairs, 7381 based on Foata normal form. 0/34135 useless extension candidates. Maximal degree in co-relation 107281. Up to 35400 conditions per place. [2023-08-26 12:18:46,957 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 85 selfloop transitions, 2 changer transitions 2/90 dead transitions. [2023-08-26 12:18:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 90 transitions, 466 flow [2023-08-26 12:18:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:18:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:18:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-26 12:18:46,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2023-08-26 12:18:46,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-26 12:18:46,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-26 12:18:46,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:46,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-26 12:18:46,961 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) [2023-08-26 12:18:46,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:46,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:46,964 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 166 flow. Second operand 3 states and 495 transitions. [2023-08-26 12:18:46,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 90 transitions, 466 flow [2023-08-26 12:18:46,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:18:46,966 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 165 flow [2023-08-26 12:18:46,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 12:18:46,967 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -43 predicate places. [2023-08-26 12:18:46,967 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 165 flow [2023-08-26 12:18:46,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:46,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:46,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:18:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:18:46,968 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:46,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 301382351, now seen corresponding path program 1 times [2023-08-26 12:18:46,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:46,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101426446] [2023-08-26 12:18:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:46,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:47,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101426446] [2023-08-26 12:18:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101426446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:47,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:47,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:18:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447475958] [2023-08-26 12:18:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:47,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:18:47,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:47,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:18:47,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:18:47,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 378 [2023-08-26 12:18:47,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:47,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:47,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 378 [2023-08-26 12:18:47,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:51,725 INFO L124 PetriNetUnfolderBase]: 28650/40967 cut-off events. [2023-08-26 12:18:51,725 INFO L125 PetriNetUnfolderBase]: For 6791/6791 co-relation queries the response was YES. [2023-08-26 12:18:51,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106415 conditions, 40967 events. 28650/40967 cut-off events. For 6791/6791 co-relation queries the response was YES. Maximal size of possible extension queue 2313. Compared 275274 event pairs, 9774 based on Foata normal form. 0/33799 useless extension candidates. Maximal degree in co-relation 106410. Up to 30769 conditions per place. [2023-08-26 12:18:51,946 INFO L140 encePairwiseOnDemand]: 374/378 looper letters, 77 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-26 12:18:51,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 81 transitions, 427 flow [2023-08-26 12:18:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:18:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:18:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-26 12:18:51,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43033509700176364 [2023-08-26 12:18:51,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-26 12:18:51,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-26 12:18:51,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:51,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-26 12:18:51,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:51,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:51,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:51,952 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 165 flow. Second operand 3 states and 488 transitions. [2023-08-26 12:18:51,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 81 transitions, 427 flow [2023-08-26 12:18:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 81 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:18:51,955 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 174 flow [2023-08-26 12:18:51,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 12:18:51,956 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -43 predicate places. [2023-08-26 12:18:51,956 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 174 flow [2023-08-26 12:18:51,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:51,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:51,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:18:51,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:18:51,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:51,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash 301382708, now seen corresponding path program 1 times [2023-08-26 12:18:51,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:51,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818645986] [2023-08-26 12:18:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:52,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:52,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818645986] [2023-08-26 12:18:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818645986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:52,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:18:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436020061] [2023-08-26 12:18:52,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:18:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:18:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:18:52,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 378 [2023-08-26 12:18:52,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:52,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:52,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 378 [2023-08-26 12:18:52,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:18:56,642 INFO L124 PetriNetUnfolderBase]: 28442/39803 cut-off events. [2023-08-26 12:18:56,643 INFO L125 PetriNetUnfolderBase]: For 8810/8810 co-relation queries the response was YES. [2023-08-26 12:18:56,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106536 conditions, 39803 events. 28442/39803 cut-off events. For 8810/8810 co-relation queries the response was YES. Maximal size of possible extension queue 2190. Compared 266210 event pairs, 6062 based on Foata normal form. 0/33607 useless extension candidates. Maximal degree in co-relation 106530. Up to 33342 conditions per place. [2023-08-26 12:18:56,855 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 88 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-26 12:18:56,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 91 transitions, 496 flow [2023-08-26 12:18:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:18:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:18:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-26 12:18:56,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4347442680776014 [2023-08-26 12:18:56,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-26 12:18:56,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-26 12:18:56,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:18:56,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-26 12:18:56,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:56,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:56,861 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:56,862 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 174 flow. Second operand 3 states and 493 transitions. [2023-08-26 12:18:56,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 91 transitions, 496 flow [2023-08-26 12:18:56,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:18:56,866 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 176 flow [2023-08-26 12:18:56,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-26 12:18:56,867 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -42 predicate places. [2023-08-26 12:18:56,867 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 176 flow [2023-08-26 12:18:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:56,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:18:56,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:18:56,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:18:56,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:18:56,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:18:56,868 INFO L85 PathProgramCache]: Analyzing trace with hash 752926664, now seen corresponding path program 1 times [2023-08-26 12:18:56,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:18:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409498369] [2023-08-26 12:18:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:18:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:18:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:18:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:18:57,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:18:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409498369] [2023-08-26 12:18:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409498369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:18:57,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:18:57,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:18:57,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516604326] [2023-08-26 12:18:57,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:18:57,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:18:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:18:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:18:57,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:18:57,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 378 [2023-08-26 12:18:57,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:18:57,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:18:57,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 378 [2023-08-26 12:18:57,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:05,353 INFO L124 PetriNetUnfolderBase]: 54045/75374 cut-off events. [2023-08-26 12:19:05,353 INFO L125 PetriNetUnfolderBase]: For 14727/14727 co-relation queries the response was YES. [2023-08-26 12:19:05,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204166 conditions, 75374 events. 54045/75374 cut-off events. For 14727/14727 co-relation queries the response was YES. Maximal size of possible extension queue 3380. Compared 507574 event pairs, 9122 based on Foata normal form. 240/62846 useless extension candidates. Maximal degree in co-relation 204159. Up to 36664 conditions per place. [2023-08-26 12:19:05,737 INFO L140 encePairwiseOnDemand]: 374/378 looper letters, 115 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2023-08-26 12:19:05,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 118 transitions, 655 flow [2023-08-26 12:19:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:05,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-26 12:19:05,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42394179894179895 [2023-08-26 12:19:05,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-26 12:19:05,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-26 12:19:05,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:05,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-26 12:19:05,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:05,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:05,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:05,745 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 176 flow. Second operand 4 states and 641 transitions. [2023-08-26 12:19:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 118 transitions, 655 flow [2023-08-26 12:19:05,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 118 transitions, 649 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:05,748 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 191 flow [2023-08-26 12:19:05,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2023-08-26 12:19:05,749 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -39 predicate places. [2023-08-26 12:19:05,749 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 191 flow [2023-08-26 12:19:05,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:05,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:05,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:05,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:19:05,750 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:19:05,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:05,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2099760509, now seen corresponding path program 1 times [2023-08-26 12:19:05,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:05,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358211828] [2023-08-26 12:19:05,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:05,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:19:06,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358211828] [2023-08-26 12:19:06,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358211828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:06,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:06,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:19:06,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186356715] [2023-08-26 12:19:06,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:06,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:19:06,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:06,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:19:06,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:19:06,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 378 [2023-08-26 12:19:06,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:06,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:06,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 378 [2023-08-26 12:19:06,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:17,269 INFO L124 PetriNetUnfolderBase]: 70532/100796 cut-off events. [2023-08-26 12:19:17,269 INFO L125 PetriNetUnfolderBase]: For 28293/28549 co-relation queries the response was YES. [2023-08-26 12:19:17,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282631 conditions, 100796 events. 70532/100796 cut-off events. For 28293/28549 co-relation queries the response was YES. Maximal size of possible extension queue 6065. Compared 781680 event pairs, 16288 based on Foata normal form. 0/82271 useless extension candidates. Maximal degree in co-relation 282622. Up to 52240 conditions per place. [2023-08-26 12:19:18,013 INFO L140 encePairwiseOnDemand]: 374/378 looper letters, 147 selfloop transitions, 5 changer transitions 0/153 dead transitions. [2023-08-26 12:19:18,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 153 transitions, 878 flow [2023-08-26 12:19:18,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:19:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:19:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 733 transitions. [2023-08-26 12:19:18,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878306878306878 [2023-08-26 12:19:18,016 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 733 transitions. [2023-08-26 12:19:18,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 733 transitions. [2023-08-26 12:19:18,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:18,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 733 transitions. [2023-08-26 12:19:18,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 378.0) internal successors, (2268), 6 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,020 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 191 flow. Second operand 5 states and 733 transitions. [2023-08-26 12:19:18,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 153 transitions, 878 flow [2023-08-26 12:19:18,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 153 transitions, 868 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:19:18,029 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 225 flow [2023-08-26 12:19:18,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2023-08-26 12:19:18,030 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -34 predicate places. [2023-08-26 12:19:18,030 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 225 flow [2023-08-26 12:19:18,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 124.5) internal successors, (747), 6 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:18,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:18,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:19:18,031 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:19:18,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash 752927050, now seen corresponding path program 1 times [2023-08-26 12:19:18,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:18,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450762711] [2023-08-26 12:19:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:18,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:19:18,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:18,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450762711] [2023-08-26 12:19:18,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450762711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:18,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:18,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:18,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281376163] [2023-08-26 12:19:18,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:19:18,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:18,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:19:18,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:19:18,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 378 [2023-08-26 12:19:18,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:18,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:18,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 378 [2023-08-26 12:19:18,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:31,097 INFO L124 PetriNetUnfolderBase]: 78943/114050 cut-off events. [2023-08-26 12:19:31,097 INFO L125 PetriNetUnfolderBase]: For 39950/39950 co-relation queries the response was YES. [2023-08-26 12:19:31,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325411 conditions, 114050 events. 78943/114050 cut-off events. For 39950/39950 co-relation queries the response was YES. Maximal size of possible extension queue 7117. Compared 900866 event pairs, 27328 based on Foata normal form. 525/97282 useless extension candidates. Maximal degree in co-relation 325399. Up to 55690 conditions per place. [2023-08-26 12:19:31,797 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 67 selfloop transitions, 17 changer transitions 0/85 dead transitions. [2023-08-26 12:19:31,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 506 flow [2023-08-26 12:19:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:31,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 550 transitions. [2023-08-26 12:19:31,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3637566137566138 [2023-08-26 12:19:31,798 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 550 transitions. [2023-08-26 12:19:31,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 550 transitions. [2023-08-26 12:19:31,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:31,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 550 transitions. [2023-08-26 12:19:31,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,802 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:31,802 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 225 flow. Second operand 4 states and 550 transitions. [2023-08-26 12:19:31,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 506 flow [2023-08-26 12:19:32,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:19:32,022 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 269 flow [2023-08-26 12:19:32,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-08-26 12:19:32,022 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -33 predicate places. [2023-08-26 12:19:32,023 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 269 flow [2023-08-26 12:19:32,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:32,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:32,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:32,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:19:32,023 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:19:32,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:32,024 INFO L85 PathProgramCache]: Analyzing trace with hash 188276404, now seen corresponding path program 1 times [2023-08-26 12:19:32,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:32,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86186582] [2023-08-26 12:19:32,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:32,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:19:32,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:32,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86186582] [2023-08-26 12:19:32,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86186582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:32,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:32,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:19:32,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651452822] [2023-08-26 12:19:32,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:32,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:19:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:19:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:19:32,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 378 [2023-08-26 12:19:32,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 269 flow. Second operand has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:32,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:32,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 378 [2023-08-26 12:19:32,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:45,534 INFO L124 PetriNetUnfolderBase]: 78319/113201 cut-off events. [2023-08-26 12:19:45,535 INFO L125 PetriNetUnfolderBase]: For 67546/67546 co-relation queries the response was YES. [2023-08-26 12:19:45,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347545 conditions, 113201 events. 78319/113201 cut-off events. For 67546/67546 co-relation queries the response was YES. Maximal size of possible extension queue 7094. Compared 896046 event pairs, 29922 based on Foata normal form. 225/106093 useless extension candidates. Maximal degree in co-relation 347533. Up to 96907 conditions per place. [2023-08-26 12:19:46,237 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 80 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-08-26 12:19:46,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 554 flow [2023-08-26 12:19:46,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:19:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:19:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-26 12:19:46,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683862433862434 [2023-08-26 12:19:46,238 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-26 12:19:46,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-26 12:19:46,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:19:46,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-26 12:19:46,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:46,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:46,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:46,241 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 269 flow. Second operand 4 states and 557 transitions. [2023-08-26 12:19:46,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 554 flow [2023-08-26 12:19:46,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 524 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:19:46,632 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 247 flow [2023-08-26 12:19:46,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2023-08-26 12:19:46,632 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -35 predicate places. [2023-08-26 12:19:46,633 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 247 flow [2023-08-26 12:19:46,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:46,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:19:46,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:19:46,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:19:46,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:19:46,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:19:46,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1874064561, now seen corresponding path program 1 times [2023-08-26 12:19:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:19:46,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224160760] [2023-08-26 12:19:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:19:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:19:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:19:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:19:46,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:19:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224160760] [2023-08-26 12:19:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224160760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:19:46,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:19:46,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:19:46,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494144302] [2023-08-26 12:19:46,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:19:46,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:19:46,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:19:46,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:19:46,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:19:46,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 378 [2023-08-26 12:19:46,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:19:46,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:19:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 378 [2023-08-26 12:19:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:19:59,757 INFO L124 PetriNetUnfolderBase]: 78208/113018 cut-off events. [2023-08-26 12:19:59,757 INFO L125 PetriNetUnfolderBase]: For 55063/55063 co-relation queries the response was YES. [2023-08-26 12:20:00,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331004 conditions, 113018 events. 78208/113018 cut-off events. For 55063/55063 co-relation queries the response was YES. Maximal size of possible extension queue 7094. Compared 894127 event pairs, 30000 based on Foata normal form. 36/95770 useless extension candidates. Maximal degree in co-relation 330995. Up to 96872 conditions per place. [2023-08-26 12:20:00,425 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 79 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2023-08-26 12:20:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 85 transitions, 524 flow [2023-08-26 12:20:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:20:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:20:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-26 12:20:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42416225749559083 [2023-08-26 12:20:00,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-26 12:20:00,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-26 12:20:00,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:00,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-26 12:20:00,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:00,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:00,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:00,430 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 247 flow. Second operand 3 states and 481 transitions. [2023-08-26 12:20:00,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 85 transitions, 524 flow [2023-08-26 12:20:00,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 518 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:20:00,515 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 258 flow [2023-08-26 12:20:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2023-08-26 12:20:00,515 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -34 predicate places. [2023-08-26 12:20:00,516 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 258 flow [2023-08-26 12:20:00,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:00,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:00,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:20:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:20:00,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:20:00,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1865991127, now seen corresponding path program 1 times [2023-08-26 12:20:00,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:00,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909520892] [2023-08-26 12:20:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:00,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:20:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909520892] [2023-08-26 12:20:00,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909520892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:00,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:00,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:20:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386931735] [2023-08-26 12:20:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:00,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:20:00,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:00,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:20:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:20:00,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 378 [2023-08-26 12:20:00,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:00,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:00,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 378 [2023-08-26 12:20:00,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:20:11,429 INFO L124 PetriNetUnfolderBase]: 63868/92256 cut-off events. [2023-08-26 12:20:11,429 INFO L125 PetriNetUnfolderBase]: For 47195/47195 co-relation queries the response was YES. [2023-08-26 12:20:11,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275030 conditions, 92256 events. 63868/92256 cut-off events. For 47195/47195 co-relation queries the response was YES. Maximal size of possible extension queue 5931. Compared 703597 event pairs, 22634 based on Foata normal form. 100/79585 useless extension candidates. Maximal degree in co-relation 275020. Up to 41167 conditions per place. [2023-08-26 12:20:11,975 INFO L140 encePairwiseOnDemand]: 361/378 looper letters, 71 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2023-08-26 12:20:11,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 86 transitions, 574 flow [2023-08-26 12:20:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:20:11,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:20:11,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-08-26 12:20:11,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3551587301587302 [2023-08-26 12:20:11,976 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-08-26 12:20:11,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-08-26 12:20:11,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:20:11,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-08-26 12:20:11,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:11,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:11,979 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 378.0) internal successors, (1890), 5 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:11,979 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 258 flow. Second operand 4 states and 537 transitions. [2023-08-26 12:20:11,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 86 transitions, 574 flow [2023-08-26 12:20:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 86 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:20:12,017 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 361 flow [2023-08-26 12:20:12,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-08-26 12:20:12,017 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-08-26 12:20:12,018 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 361 flow [2023-08-26 12:20:12,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.2) internal successors, (596), 5 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:12,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:20:12,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:20:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:20:12,018 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 12:20:12,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:20:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -594654981, now seen corresponding path program 1 times [2023-08-26 12:20:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:20:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446102533] [2023-08-26 12:20:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:20:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:20:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:20:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:20:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:20:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446102533] [2023-08-26 12:20:13,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446102533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:20:13,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:20:13,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:20:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772249612] [2023-08-26 12:20:13,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:20:13,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:20:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:20:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:20:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:20:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 378 [2023-08-26 12:20:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 361 flow. Second operand has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:20:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:20:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 378 [2023-08-26 12:20:13,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand