/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/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:08:37,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:08:37,605 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 12:08:37,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:08:37,615 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:08:37,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:08:37,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:08:37,654 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:08:37,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:08:37,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:08:37,659 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:08:37,659 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:08:37,659 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:08:37,660 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:08:37,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:08:37,661 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:08:37,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:08:37,661 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:08:37,661 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:08:37,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:08:37,662 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:08:37,663 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:08:37,663 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:08:37,663 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:08:37,664 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:08:37,664 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:08:37,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:08:37,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:08:37,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:08:37,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:08:37,666 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:08:37,666 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:08:37,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:08:37,666 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:08:37,666 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:08:37,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:08:38,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:08:38,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:08:38,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:08:38,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:08:38,033 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:08:38,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 12:08:39,230 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:08:39,527 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:08:39,527 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 12:08:39,548 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb0fc49e/a4f16dcb2fbe41dabc2a85db008fca7c/FLAG84aa0829a [2023-08-26 12:08:39,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcb0fc49e/a4f16dcb2fbe41dabc2a85db008fca7c [2023-08-26 12:08:39,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:08:39,565 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:08:39,566 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:08:39,566 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:08:39,569 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:08:39,570 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:08:39" (1/1) ... [2023-08-26 12:08:39,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633efba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:39, skipping insertion in model container [2023-08-26 12:08:39,571 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:08:39" (1/1) ... [2023-08-26 12:08:39,608 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:08:40,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:08:40,035 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:08:40,066 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:08:40,068 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:08:40,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:08:40,167 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:08:40,167 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:08:40,173 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:08:40,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40 WrapperNode [2023-08-26 12:08:40,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:08:40,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:08:40,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:08:40,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:08:40,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,252 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 160 [2023-08-26 12:08:40,253 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:08:40,253 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:08:40,254 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:08:40,254 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:08:40,262 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,275 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,275 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,306 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:08:40,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:08:40,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:08:40,311 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:08:40,311 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (1/1) ... [2023-08-26 12:08:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:08:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:08:40,363 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 12:08:40,386 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 12:08:40,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:08:40,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:08:40,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:08:40,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:08:40,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:08:40,400 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:08:40,400 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:08:40,400 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:08:40,401 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:08:40,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:08:40,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:08:40,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:08:40,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:08:40,402 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 12:08:40,555 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:08:40,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:08:40,906 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:08:41,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:08:41,075 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:08:41,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:08:41 BoogieIcfgContainer [2023-08-26 12:08:41,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:08:41,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:08:41,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:08:41,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:08:41,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:08:39" (1/3) ... [2023-08-26 12:08:41,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bed64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:08:41, skipping insertion in model container [2023-08-26 12:08:41,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:08:40" (2/3) ... [2023-08-26 12:08:41,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bed64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:08:41, skipping insertion in model container [2023-08-26 12:08:41,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:08:41" (3/3) ... [2023-08-26 12:08:41,086 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2023-08-26 12:08:41,103 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:08:41,103 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 12:08:41,103 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:08:41,155 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:08:41,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 100 transitions, 210 flow [2023-08-26 12:08:41,245 INFO L124 PetriNetUnfolderBase]: 3/98 cut-off events. [2023-08-26 12:08:41,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:41,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 98 events. 3/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 12:08:41,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 100 transitions, 210 flow [2023-08-26 12:08:41,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 98 transitions, 202 flow [2023-08-26 12:08:41,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:08:41,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 98 transitions, 202 flow [2023-08-26 12:08:41,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 98 transitions, 202 flow [2023-08-26 12:08:41,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 98 transitions, 202 flow [2023-08-26 12:08:41,318 INFO L124 PetriNetUnfolderBase]: 3/98 cut-off events. [2023-08-26 12:08:41,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:41,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 98 events. 3/98 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 12:08:41,321 INFO L119 LiptonReduction]: Number of co-enabled transitions 1420 [2023-08-26 12:08:45,272 INFO L134 LiptonReduction]: Checked pairs total: 3879 [2023-08-26 12:08:45,272 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-26 12:08:45,290 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:08:45,295 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;@37aee61e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:08:45,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 12:08:45,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:08:45,296 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:08:45,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:45,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:45,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:08:45,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:45,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 550, now seen corresponding path program 1 times [2023-08-26 12:08:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420226064] [2023-08-26 12:08:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:45,397 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 12:08:45,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:45,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420226064] [2023-08-26 12:08:45,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420226064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:45,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:45,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:08:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118830503] [2023-08-26 12:08:45,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:45,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:08:45,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:08:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:08:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 204 [2023-08-26 12:08:45,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 12:08:45,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:45,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 204 [2023-08-26 12:08:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:45,636 INFO L124 PetriNetUnfolderBase]: 324/547 cut-off events. [2023-08-26 12:08:45,636 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 12:08:45,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 547 events. 324/547 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2041 event pairs, 324 based on Foata normal form. 0/475 useless extension candidates. Maximal degree in co-relation 1102. Up to 548 conditions per place. [2023-08-26 12:08:45,641 INFO L140 encePairwiseOnDemand]: 200/204 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 12:08:45,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 82 flow [2023-08-26 12:08:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:08:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:08:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 12:08:45,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4730392156862745 [2023-08-26 12:08:45,657 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 12:08:45,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 12:08:45,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:45,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 12:08:45,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states 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 12:08:45,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 12:08:45,667 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 12:08:45,669 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 2 states and 193 transitions. [2023-08-26 12:08:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 82 flow [2023-08-26 12:08:45,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:45,673 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 42 flow [2023-08-26 12:08:45,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-26 12:08:45,677 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -5 predicate places. [2023-08-26 12:08:45,677 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 42 flow [2023-08-26 12:08:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 12:08:45,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:45,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:08:45,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:08:45,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:45,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:45,679 INFO L85 PathProgramCache]: Analyzing trace with hash 521753738, now seen corresponding path program 1 times [2023-08-26 12:08:45,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:45,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428209403] [2023-08-26 12:08:45,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:45,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:45,993 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 12:08:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428209403] [2023-08-26 12:08:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428209403] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:45,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:08:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20823400] [2023-08-26 12:08:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:08:45,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:08:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:08:45,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 204 [2023-08-26 12:08:45,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 12:08:45,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:45,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 204 [2023-08-26 12:08:45,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:46,148 INFO L124 PetriNetUnfolderBase]: 275/468 cut-off events. [2023-08-26 12:08:46,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:08:46,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 468 events. 275/468 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1747 event pairs, 30 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 950. Up to 396 conditions per place. [2023-08-26 12:08:46,151 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 23 selfloop transitions, 2 changer transitions 2/27 dead transitions. [2023-08-26 12:08:46,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 112 flow [2023-08-26 12:08:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:08:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:08:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 12:08:46,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2023-08-26 12:08:46,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 12:08:46,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 12:08:46,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:46,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 12:08:46,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states 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 12:08:46,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:46,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:46,158 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 42 flow. Second operand 3 states and 280 transitions. [2023-08-26 12:08:46,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 112 flow [2023-08-26 12:08:46,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:08:46,159 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 42 flow [2023-08-26 12:08:46,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-08-26 12:08:46,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-26 12:08:46,161 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 42 flow [2023-08-26 12:08:46,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states 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 12:08:46,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:46,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:46,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:08:46,162 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:46,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1105756916, now seen corresponding path program 1 times [2023-08-26 12:08:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:46,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747570572] [2023-08-26 12:08:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:46,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:46,725 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 12:08:46,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:46,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747570572] [2023-08-26 12:08:46,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747570572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:46,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:46,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:08:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570574120] [2023-08-26 12:08:46,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:46,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:08:46,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:46,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:08:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:08:46,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 12:08:46,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 12:08:46,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:46,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 12:08:46,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:46,882 INFO L124 PetriNetUnfolderBase]: 182/321 cut-off events. [2023-08-26 12:08:46,882 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 12:08:46,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 321 events. 182/321 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1131 event pairs, 80 based on Foata normal form. 18/339 useless extension candidates. Maximal degree in co-relation 678. Up to 193 conditions per place. [2023-08-26 12:08:46,885 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 12:08:46,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 116 flow [2023-08-26 12:08:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:08:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:08:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 246 transitions. [2023-08-26 12:08:46,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019607843137255 [2023-08-26 12:08:46,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 246 transitions. [2023-08-26 12:08:46,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 246 transitions. [2023-08-26 12:08:46,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:46,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 246 transitions. [2023-08-26 12:08:46,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 12:08:46,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:46,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:46,894 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 42 flow. Second operand 3 states and 246 transitions. [2023-08-26 12:08:46,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 116 flow [2023-08-26 12:08:46,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:46,895 INFO L231 Difference]: Finished difference. Result has 26 places, 17 transitions, 46 flow [2023-08-26 12:08:46,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=26, PETRI_TRANSITIONS=17} [2023-08-26 12:08:46,897 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-26 12:08:46,897 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 17 transitions, 46 flow [2023-08-26 12:08:46,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states 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 12:08:46,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:46,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:46,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:08:46,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:46,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2002297359, now seen corresponding path program 1 times [2023-08-26 12:08:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:46,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440866129] [2023-08-26 12:08:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:47,103 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 12:08:47,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:47,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440866129] [2023-08-26 12:08:47,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440866129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:47,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:47,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:08:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108815584] [2023-08-26 12:08:47,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:08:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:47,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:08:47,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:08:47,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 204 [2023-08-26 12:08:47,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 12:08:47,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:47,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 204 [2023-08-26 12:08:47,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:47,198 INFO L124 PetriNetUnfolderBase]: 172/305 cut-off events. [2023-08-26 12:08:47,198 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 12:08:47,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 682 conditions, 305 events. 172/305 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 976 event pairs, 56 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 677. Up to 210 conditions per place. [2023-08-26 12:08:47,200 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 22 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-26 12:08:47,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 111 flow [2023-08-26 12:08:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:08:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:08:47,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 12:08:47,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4477124183006536 [2023-08-26 12:08:47,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 12:08:47,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 12:08:47,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:47,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 12:08:47,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 12:08:47,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:47,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 12:08:47,206 INFO L175 Difference]: Start difference. First operand has 26 places, 17 transitions, 46 flow. Second operand 3 states and 274 transitions. [2023-08-26 12:08:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 111 flow [2023-08-26 12:08:47,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 105 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:47,207 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 50 flow [2023-08-26 12:08:47,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-26 12:08:47,209 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-26 12:08:47,209 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 50 flow [2023-08-26 12:08:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states 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 12:08:47,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:47,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:08:47,213 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:47,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1859146585, now seen corresponding path program 1 times [2023-08-26 12:08:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614717584] [2023-08-26 12:08:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:48,157 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 12:08:48,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:48,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614717584] [2023-08-26 12:08:48,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614717584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:48,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:48,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:08:48,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621903906] [2023-08-26 12:08:48,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:48,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:08:48,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:48,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:08:48,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:08:48,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 12:08:48,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:48,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:48,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 12:08:48,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:48,337 INFO L124 PetriNetUnfolderBase]: 195/343 cut-off events. [2023-08-26 12:08:48,341 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-26 12:08:48,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 343 events. 195/343 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1165 event pairs, 34 based on Foata normal form. 1/344 useless extension candidates. Maximal degree in co-relation 795. Up to 262 conditions per place. [2023-08-26 12:08:48,344 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 29 selfloop transitions, 13 changer transitions 0/42 dead transitions. [2023-08-26 12:08:48,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 193 flow [2023-08-26 12:08:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:08:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:08:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 505 transitions. [2023-08-26 12:08:48,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125816993464052 [2023-08-26 12:08:48,347 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 505 transitions. [2023-08-26 12:08:48,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 505 transitions. [2023-08-26 12:08:48,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:48,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 505 transitions. [2023-08-26 12:08:48,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 0 states have call successors, (0), 0 states 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 12:08:48,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:08:48,352 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:08:48,352 INFO L175 Difference]: Start difference. First operand has 27 places, 17 transitions, 50 flow. Second operand 6 states and 505 transitions. [2023-08-26 12:08:48,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 193 flow [2023-08-26 12:08:48,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:08:48,355 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 134 flow [2023-08-26 12:08:48,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-26 12:08:48,355 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-26 12:08:48,356 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 134 flow [2023-08-26 12:08:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:48,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:48,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:48,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:08:48,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:48,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -860693719, now seen corresponding path program 2 times [2023-08-26 12:08:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:48,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515823783] [2023-08-26 12:08:48,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:48,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:49,242 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 12:08:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:49,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515823783] [2023-08-26 12:08:49,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515823783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:49,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:49,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:08:49,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357140972] [2023-08-26 12:08:49,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:49,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:08:49,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:08:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:08:49,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 12:08:49,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 134 flow. Second operand has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:08:49,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 12:08:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:49,543 INFO L124 PetriNetUnfolderBase]: 221/389 cut-off events. [2023-08-26 12:08:49,544 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-08-26 12:08:49,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 389 events. 221/389 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1439 event pairs, 14 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 1240. Up to 254 conditions per place. [2023-08-26 12:08:49,547 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 34 selfloop transitions, 15 changer transitions 0/49 dead transitions. [2023-08-26 12:08:49,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 321 flow [2023-08-26 12:08:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:08:49,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:08:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 424 transitions. [2023-08-26 12:08:49,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41568627450980394 [2023-08-26 12:08:49,549 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 424 transitions. [2023-08-26 12:08:49,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 424 transitions. [2023-08-26 12:08:49,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:49,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 424 transitions. [2023-08-26 12:08:49,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:49,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 12:08:49,553 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 12:08:49,553 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 134 flow. Second operand 5 states and 424 transitions. [2023-08-26 12:08:49,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 321 flow [2023-08-26 12:08:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:08:49,556 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 229 flow [2023-08-26 12:08:49,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-26 12:08:49,557 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2023-08-26 12:08:49,557 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 229 flow [2023-08-26 12:08:49,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:08:49,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:49,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:49,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:08:49,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:49,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:49,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1697967949, now seen corresponding path program 3 times [2023-08-26 12:08:49,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:49,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198023852] [2023-08-26 12:08:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:50,350 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 12:08:50,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198023852] [2023-08-26 12:08:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198023852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:50,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:08:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823088597] [2023-08-26 12:08:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:08:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:08:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:08:50,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 12:08:50,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 229 flow. Second operand has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:08:50,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:50,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 12:08:50,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:50,635 INFO L124 PetriNetUnfolderBase]: 233/409 cut-off events. [2023-08-26 12:08:50,635 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-26 12:08:50,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 409 events. 233/409 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1524 event pairs, 11 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1539. Up to 260 conditions per place. [2023-08-26 12:08:50,639 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 37 selfloop transitions, 23 changer transitions 0/60 dead transitions. [2023-08-26 12:08:50,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 467 flow [2023-08-26 12:08:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:08:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:08:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 588 transitions. [2023-08-26 12:08:50,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-08-26 12:08:50,641 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 588 transitions. [2023-08-26 12:08:50,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 588 transitions. [2023-08-26 12:08:50,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:50,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 588 transitions. [2023-08-26 12:08:50,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 12:08:50,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:50,645 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:50,645 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 229 flow. Second operand 7 states and 588 transitions. [2023-08-26 12:08:50,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 467 flow [2023-08-26 12:08:50,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 450 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 12:08:50,650 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 326 flow [2023-08-26 12:08:50,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=326, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-26 12:08:50,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2023-08-26 12:08:50,651 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 326 flow [2023-08-26 12:08:50,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 78.5) internal successors, (628), 8 states have internal predecessors, (628), 0 states have call successors, (0), 0 states 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 12:08:50,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:50,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:50,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:08:50,652 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:50,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1015713461, now seen corresponding path program 4 times [2023-08-26 12:08:50,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:50,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490531529] [2023-08-26 12:08:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:51,190 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 12:08:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490531529] [2023-08-26 12:08:51,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490531529] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:51,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:51,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:51,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351905023] [2023-08-26 12:08:51,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:51,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:51,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:51,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 12:08:51,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 326 flow. Second operand has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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 12:08:51,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:51,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 12:08:51,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:51,422 INFO L124 PetriNetUnfolderBase]: 255/448 cut-off events. [2023-08-26 12:08:51,422 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-26 12:08:51,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1797 conditions, 448 events. 255/448 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1712 event pairs, 34 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 1783. Up to 287 conditions per place. [2023-08-26 12:08:51,426 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 42 selfloop transitions, 25 changer transitions 0/67 dead transitions. [2023-08-26 12:08:51,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 587 flow [2023-08-26 12:08:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:08:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:08:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2023-08-26 12:08:51,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2023-08-26 12:08:51,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2023-08-26 12:08:51,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2023-08-26 12:08:51,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:51,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2023-08-26 12:08:51,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states 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 12:08:51,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:51,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:51,432 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 326 flow. Second operand 7 states and 570 transitions. [2023-08-26 12:08:51,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 587 flow [2023-08-26 12:08:51,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 559 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:08:51,438 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 441 flow [2023-08-26 12:08:51,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-26 12:08:51,439 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2023-08-26 12:08:51,439 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 441 flow [2023-08-26 12:08:51,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.71428571428571) internal successors, (537), 7 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 12:08:51,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:51,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:51,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:08:51,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:51,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1933047320, now seen corresponding path program 1 times [2023-08-26 12:08:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120440719] [2023-08-26 12:08:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:51,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:52,425 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 12:08:52,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:52,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120440719] [2023-08-26 12:08:52,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120440719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:52,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:52,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:52,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444149550] [2023-08-26 12:08:52,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:52,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:52,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:52,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:52,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:52,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 204 [2023-08-26 12:08:52,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 441 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:08:52,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:52,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 204 [2023-08-26 12:08:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:52,686 INFO L124 PetriNetUnfolderBase]: 271/478 cut-off events. [2023-08-26 12:08:52,686 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-26 12:08:52,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 478 events. 271/478 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1881 event pairs, 35 based on Foata normal form. 2/480 useless extension candidates. Maximal degree in co-relation 2142. Up to 391 conditions per place. [2023-08-26 12:08:52,693 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 53 selfloop transitions, 17 changer transitions 0/70 dead transitions. [2023-08-26 12:08:52,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 70 transitions, 693 flow [2023-08-26 12:08:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:08:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:08:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 500 transitions. [2023-08-26 12:08:52,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4084967320261438 [2023-08-26 12:08:52,695 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 500 transitions. [2023-08-26 12:08:52,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 500 transitions. [2023-08-26 12:08:52,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:52,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 500 transitions. [2023-08-26 12:08:52,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.33333333333333) internal successors, (500), 6 states have internal predecessors, (500), 0 states have call successors, (0), 0 states 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 12:08:52,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:08:52,698 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:08:52,698 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 441 flow. Second operand 6 states and 500 transitions. [2023-08-26 12:08:52,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 70 transitions, 693 flow [2023-08-26 12:08:52,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 662 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 12:08:52,707 INFO L231 Difference]: Finished difference. Result has 54 places, 56 transitions, 516 flow [2023-08-26 12:08:52,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=54, PETRI_TRANSITIONS=56} [2023-08-26 12:08:52,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2023-08-26 12:08:52,708 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 56 transitions, 516 flow [2023-08-26 12:08:52,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:08:52,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:52,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:52,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:08:52,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:52,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:52,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1122713927, now seen corresponding path program 1 times [2023-08-26 12:08:52,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247281408] [2023-08-26 12:08:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:52,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:53,103 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 12:08:53,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:53,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247281408] [2023-08-26 12:08:53,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247281408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:53,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:53,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505077175] [2023-08-26 12:08:53,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:53,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:53,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:53,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:53,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:53,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 12:08:53,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 12:08:53,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:53,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 12:08:53,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:53,387 INFO L124 PetriNetUnfolderBase]: 333/601 cut-off events. [2023-08-26 12:08:53,388 INFO L125 PetriNetUnfolderBase]: For 1945/1945 co-relation queries the response was YES. [2023-08-26 12:08:53,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 601 events. 333/601 cut-off events. For 1945/1945 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2645 event pairs, 26 based on Foata normal form. 10/611 useless extension candidates. Maximal degree in co-relation 2680. Up to 301 conditions per place. [2023-08-26 12:08:53,393 INFO L140 encePairwiseOnDemand]: 193/204 looper letters, 69 selfloop transitions, 41 changer transitions 4/114 dead transitions. [2023-08-26 12:08:53,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 114 transitions, 1097 flow [2023-08-26 12:08:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 12:08:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 12:08:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 891 transitions. [2023-08-26 12:08:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2023-08-26 12:08:53,396 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 891 transitions. [2023-08-26 12:08:53,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 891 transitions. [2023-08-26 12:08:53,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:53,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 891 transitions. [2023-08-26 12:08:53,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 81.0) internal successors, (891), 11 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 12:08:53,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 12:08:53,402 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 12:08:53,402 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 516 flow. Second operand 11 states and 891 transitions. [2023-08-26 12:08:53,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 114 transitions, 1097 flow [2023-08-26 12:08:53,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 114 transitions, 1056 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 12:08:53,411 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 849 flow [2023-08-26 12:08:53,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=849, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2023-08-26 12:08:53,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2023-08-26 12:08:53,413 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 849 flow [2023-08-26 12:08:53,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 12:08:53,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:53,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:53,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:08:53,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:53,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash -790034530, now seen corresponding path program 2 times [2023-08-26 12:08:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556766042] [2023-08-26 12:08:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:54,617 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 12:08:54,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556766042] [2023-08-26 12:08:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556766042] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:08:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188499220] [2023-08-26 12:08:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:54,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:08:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:08:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:08:54,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 12:08:54,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 849 flow. Second operand has 9 states, 9 states have (on average 76.44444444444444) internal successors, (688), 9 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 12:08:54,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:54,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 12:08:54,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:54,941 INFO L124 PetriNetUnfolderBase]: 299/537 cut-off events. [2023-08-26 12:08:54,942 INFO L125 PetriNetUnfolderBase]: For 2487/2487 co-relation queries the response was YES. [2023-08-26 12:08:54,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2827 conditions, 537 events. 299/537 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2292 event pairs, 50 based on Foata normal form. 2/539 useless extension candidates. Maximal degree in co-relation 2808. Up to 282 conditions per place. [2023-08-26 12:08:54,947 INFO L140 encePairwiseOnDemand]: 199/204 looper letters, 69 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2023-08-26 12:08:54,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 1135 flow [2023-08-26 12:08:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:08:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:08:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2023-08-26 12:08:54,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403921568627451 [2023-08-26 12:08:54,949 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2023-08-26 12:08:54,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2023-08-26 12:08:54,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:54,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2023-08-26 12:08:54,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states 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 12:08:54,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 12:08:54,952 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 204.0) internal successors, (1224), 6 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 12:08:54,952 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 849 flow. Second operand 5 states and 412 transitions. [2023-08-26 12:08:54,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 1135 flow [2023-08-26 12:08:54,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 1112 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 12:08:54,967 INFO L231 Difference]: Finished difference. Result has 66 places, 81 transitions, 900 flow [2023-08-26 12:08:54,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=900, PETRI_PLACES=66, PETRI_TRANSITIONS=81} [2023-08-26 12:08:54,968 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 36 predicate places. [2023-08-26 12:08:54,968 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 81 transitions, 900 flow [2023-08-26 12:08:54,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 76.44444444444444) internal successors, (688), 9 states have internal predecessors, (688), 0 states have call successors, (0), 0 states 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 12:08:54,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:54,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:54,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:08:54,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:54,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:54,969 INFO L85 PathProgramCache]: Analyzing trace with hash 449259869, now seen corresponding path program 2 times [2023-08-26 12:08:54,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:54,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346754593] [2023-08-26 12:08:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:54,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:55,331 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 12:08:55,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:55,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346754593] [2023-08-26 12:08:55,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346754593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:55,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:55,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:55,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978204813] [2023-08-26 12:08:55,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:55,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:08:55,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:08:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:08:55,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 12:08:55,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 81 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 12:08:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 12:08:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:55,660 INFO L124 PetriNetUnfolderBase]: 347/638 cut-off events. [2023-08-26 12:08:55,660 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2023-08-26 12:08:55,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3392 conditions, 638 events. 347/638 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2938 event pairs, 31 based on Foata normal form. 12/650 useless extension candidates. Maximal degree in co-relation 3371. Up to 221 conditions per place. [2023-08-26 12:08:55,665 INFO L140 encePairwiseOnDemand]: 193/204 looper letters, 43 selfloop transitions, 27 changer transitions 88/158 dead transitions. [2023-08-26 12:08:55,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 158 transitions, 1864 flow [2023-08-26 12:08:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 12:08:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 12:08:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 914 transitions. [2023-08-26 12:08:55,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730837789661317 [2023-08-26 12:08:55,668 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 914 transitions. [2023-08-26 12:08:55,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 914 transitions. [2023-08-26 12:08:55,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:55,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 914 transitions. [2023-08-26 12:08:55,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 83.0909090909091) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:55,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 12:08:55,674 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 204.0) internal successors, (2448), 12 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 12:08:55,674 INFO L175 Difference]: Start difference. First operand has 66 places, 81 transitions, 900 flow. Second operand 11 states and 914 transitions. [2023-08-26 12:08:55,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 158 transitions, 1864 flow [2023-08-26 12:08:55,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 158 transitions, 1796 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:08:55,696 INFO L231 Difference]: Finished difference. Result has 81 places, 55 transitions, 691 flow [2023-08-26 12:08:55,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=691, PETRI_PLACES=81, PETRI_TRANSITIONS=55} [2023-08-26 12:08:55,698 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2023-08-26 12:08:55,698 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 55 transitions, 691 flow [2023-08-26 12:08:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.16666666666667) internal successors, (463), 6 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 12:08:55,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:55,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:08:55,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:55,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1959633025, now seen corresponding path program 3 times [2023-08-26 12:08:55,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:55,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283435407] [2023-08-26 12:08:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:56,471 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 12:08:56,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:56,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283435407] [2023-08-26 12:08:56,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283435407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:56,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732502065] [2023-08-26 12:08:56,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:56,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:56,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 12:08:56,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 55 transitions, 691 flow. Second operand has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 12:08:56,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:56,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 12:08:56,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:56,852 INFO L124 PetriNetUnfolderBase]: 169/339 cut-off events. [2023-08-26 12:08:56,852 INFO L125 PetriNetUnfolderBase]: For 3572/3572 co-relation queries the response was YES. [2023-08-26 12:08:56,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 339 events. 169/339 cut-off events. For 3572/3572 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1317 event pairs, 22 based on Foata normal form. 3/342 useless extension candidates. Maximal degree in co-relation 2231. Up to 147 conditions per place. [2023-08-26 12:08:56,855 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 45 selfloop transitions, 32 changer transitions 0/77 dead transitions. [2023-08-26 12:08:56,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 77 transitions, 1018 flow [2023-08-26 12:08:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:08:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:08:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 632 transitions. [2023-08-26 12:08:56,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872549019607843 [2023-08-26 12:08:56,858 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 632 transitions. [2023-08-26 12:08:56,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 632 transitions. [2023-08-26 12:08:56,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:56,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 632 transitions. [2023-08-26 12:08:56,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.0) internal successors, (632), 8 states have internal predecessors, (632), 0 states have call successors, (0), 0 states 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 12:08:56,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:56,862 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:56,862 INFO L175 Difference]: Start difference. First operand has 81 places, 55 transitions, 691 flow. Second operand 8 states and 632 transitions. [2023-08-26 12:08:56,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 77 transitions, 1018 flow [2023-08-26 12:08:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 901 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-08-26 12:08:56,873 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 759 flow [2023-08-26 12:08:56,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=759, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-26 12:08:56,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-26 12:08:56,874 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 759 flow [2023-08-26 12:08:56,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 12:08:56,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:56,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:56,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:08:56,874 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:56,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1422343899, now seen corresponding path program 4 times [2023-08-26 12:08:56,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:56,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871887931] [2023-08-26 12:08:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:56,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:57,239 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 12:08:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871887931] [2023-08-26 12:08:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871887931] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:57,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28466615] [2023-08-26 12:08:57,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:57,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 12:08:57,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 759 flow. Second operand has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 12:08:57,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:57,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 12:08:57,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:57,520 INFO L124 PetriNetUnfolderBase]: 193/392 cut-off events. [2023-08-26 12:08:57,520 INFO L125 PetriNetUnfolderBase]: For 3382/3382 co-relation queries the response was YES. [2023-08-26 12:08:57,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2464 conditions, 392 events. 193/392 cut-off events. For 3382/3382 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1631 event pairs, 44 based on Foata normal form. 12/404 useless extension candidates. Maximal degree in co-relation 2438. Up to 188 conditions per place. [2023-08-26 12:08:57,524 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 50 selfloop transitions, 26 changer transitions 15/91 dead transitions. [2023-08-26 12:08:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 91 transitions, 1212 flow [2023-08-26 12:08:57,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:08:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:08:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 642 transitions. [2023-08-26 12:08:57,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39338235294117646 [2023-08-26 12:08:57,526 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 642 transitions. [2023-08-26 12:08:57,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 642 transitions. [2023-08-26 12:08:57,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:57,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 642 transitions. [2023-08-26 12:08:57,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.25) internal successors, (642), 8 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 12:08:57,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:57,531 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:57,531 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 759 flow. Second operand 8 states and 642 transitions. [2023-08-26 12:08:57,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 91 transitions, 1212 flow [2023-08-26 12:08:57,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 1132 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-26 12:08:57,540 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 864 flow [2023-08-26 12:08:57,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=864, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2023-08-26 12:08:57,541 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2023-08-26 12:08:57,541 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 864 flow [2023-08-26 12:08:57,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 75.85714285714286) internal successors, (531), 7 states have internal predecessors, (531), 0 states have call successors, (0), 0 states 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 12:08:57,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:57,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:57,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:08:57,542 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:57,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:57,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1340911639, now seen corresponding path program 5 times [2023-08-26 12:08:57,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:57,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881049579] [2023-08-26 12:08:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:57,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:58,137 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 12:08:58,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:58,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881049579] [2023-08-26 12:08:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881049579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:58,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:58,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:58,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500267535] [2023-08-26 12:08:58,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:58,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:58,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:58,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:58,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:58,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 204 [2023-08-26 12:08:58,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 864 flow. Second operand has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:08:58,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:58,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 204 [2023-08-26 12:08:58,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:58,395 INFO L124 PetriNetUnfolderBase]: 156/329 cut-off events. [2023-08-26 12:08:58,395 INFO L125 PetriNetUnfolderBase]: For 3758/3758 co-relation queries the response was YES. [2023-08-26 12:08:58,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 329 events. 156/329 cut-off events. For 3758/3758 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1314 event pairs, 44 based on Foata normal form. 11/340 useless extension candidates. Maximal degree in co-relation 2195. Up to 165 conditions per place. [2023-08-26 12:08:58,399 INFO L140 encePairwiseOnDemand]: 197/204 looper letters, 51 selfloop transitions, 19 changer transitions 11/81 dead transitions. [2023-08-26 12:08:58,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 1127 flow [2023-08-26 12:08:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:08:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:08:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 575 transitions. [2023-08-26 12:08:58,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4026610644257703 [2023-08-26 12:08:58,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 575 transitions. [2023-08-26 12:08:58,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 575 transitions. [2023-08-26 12:08:58,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:58,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 575 transitions. [2023-08-26 12:08:58,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states 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 12:08:58,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:58,405 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:08:58,405 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 864 flow. Second operand 7 states and 575 transitions. [2023-08-26 12:08:58,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 1127 flow [2023-08-26 12:08:58,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 1068 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-26 12:08:58,417 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 805 flow [2023-08-26 12:08:58,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=805, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2023-08-26 12:08:58,417 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2023-08-26 12:08:58,417 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 805 flow [2023-08-26 12:08:58,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 12:08:58,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:58,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:58,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:08:58,418 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:58,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:58,418 INFO L85 PathProgramCache]: Analyzing trace with hash 579617396, now seen corresponding path program 1 times [2023-08-26 12:08:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:58,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947274719] [2023-08-26 12:08:58,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:58,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:08:59,096 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 12:08:59,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:08:59,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947274719] [2023-08-26 12:08:59,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947274719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:08:59,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:08:59,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:08:59,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561693176] [2023-08-26 12:08:59,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:08:59,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:08:59,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:08:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:08:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:08:59,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 12:08:59,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 805 flow. Second operand has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:08:59,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:08:59,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 12:08:59,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:08:59,411 INFO L124 PetriNetUnfolderBase]: 165/355 cut-off events. [2023-08-26 12:08:59,411 INFO L125 PetriNetUnfolderBase]: For 3958/3958 co-relation queries the response was YES. [2023-08-26 12:08:59,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2416 conditions, 355 events. 165/355 cut-off events. For 3958/3958 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1462 event pairs, 34 based on Foata normal form. 8/363 useless extension candidates. Maximal degree in co-relation 2386. Up to 116 conditions per place. [2023-08-26 12:08:59,414 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 49 selfloop transitions, 23 changer transitions 20/92 dead transitions. [2023-08-26 12:08:59,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 1283 flow [2023-08-26 12:08:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:08:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:08:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2023-08-26 12:08:59,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2023-08-26 12:08:59,417 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2023-08-26 12:08:59,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2023-08-26 12:08:59,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:08:59,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2023-08-26 12:08:59,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 80.75) internal successors, (646), 8 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:08:59,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:59,421 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:08:59,421 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 805 flow. Second operand 8 states and 646 transitions. [2023-08-26 12:08:59,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 1283 flow [2023-08-26 12:08:59,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 92 transitions, 1232 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-08-26 12:08:59,433 INFO L231 Difference]: Finished difference. Result has 86 places, 57 transitions, 806 flow [2023-08-26 12:08:59,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=86, PETRI_TRANSITIONS=57} [2023-08-26 12:08:59,434 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2023-08-26 12:08:59,434 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 57 transitions, 806 flow [2023-08-26 12:08:59,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 76.0) internal successors, (532), 7 states have internal predecessors, (532), 0 states have call successors, (0), 0 states 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 12:08:59,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:08:59,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:08:59,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:08:59,434 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:08:59,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:08:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash -165529610, now seen corresponding path program 2 times [2023-08-26 12:08:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:08:59,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891806726] [2023-08-26 12:08:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:08:59,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:08:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:01,039 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 12:09:01,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:01,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891806726] [2023-08-26 12:09:01,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891806726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:01,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:01,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:09:01,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501335509] [2023-08-26 12:09:01,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:01,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:09:01,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:09:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:09:01,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 12:09:01,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 57 transitions, 806 flow. Second operand has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:01,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 12:09:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:01,381 INFO L124 PetriNetUnfolderBase]: 137/300 cut-off events. [2023-08-26 12:09:01,381 INFO L125 PetriNetUnfolderBase]: For 3804/3804 co-relation queries the response was YES. [2023-08-26 12:09:01,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2065 conditions, 300 events. 137/300 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1198 event pairs, 35 based on Foata normal form. 10/310 useless extension candidates. Maximal degree in co-relation 2033. Up to 151 conditions per place. [2023-08-26 12:09:01,384 INFO L140 encePairwiseOnDemand]: 196/204 looper letters, 48 selfloop transitions, 10 changer transitions 23/81 dead transitions. [2023-08-26 12:09:01,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 1187 flow [2023-08-26 12:09:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:09:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:09:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 630 transitions. [2023-08-26 12:09:01,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860294117647059 [2023-08-26 12:09:01,387 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 630 transitions. [2023-08-26 12:09:01,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 630 transitions. [2023-08-26 12:09:01,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:01,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 630 transitions. [2023-08-26 12:09:01,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 78.75) internal successors, (630), 8 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 12:09:01,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:09:01,393 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 204.0) internal successors, (1836), 9 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states 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 12:09:01,393 INFO L175 Difference]: Start difference. First operand has 86 places, 57 transitions, 806 flow. Second operand 8 states and 630 transitions. [2023-08-26 12:09:01,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 1187 flow [2023-08-26 12:09:01,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 1100 flow, removed 26 selfloop flow, removed 8 redundant places. [2023-08-26 12:09:01,404 INFO L231 Difference]: Finished difference. Result has 87 places, 47 transitions, 686 flow [2023-08-26 12:09:01,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=686, PETRI_PLACES=87, PETRI_TRANSITIONS=47} [2023-08-26 12:09:01,405 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2023-08-26 12:09:01,405 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 47 transitions, 686 flow [2023-08-26 12:09:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 74.4) internal successors, (744), 10 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:01,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:09:01,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:09:01,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:09:01,406 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:09:01,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:09:01,406 INFO L85 PathProgramCache]: Analyzing trace with hash 932962598, now seen corresponding path program 3 times [2023-08-26 12:09:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:09:01,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655182337] [2023-08-26 12:09:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:09:01,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:09:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:02,500 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 12:09:02,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:02,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655182337] [2023-08-26 12:09:02,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655182337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:02,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:02,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:09:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627660567] [2023-08-26 12:09:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:02,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:09:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:09:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:09:02,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 204 [2023-08-26 12:09:02,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 47 transitions, 686 flow. Second operand has 10 states, 10 states have (on average 69.4) internal successors, (694), 10 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 12:09:02,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:02,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 204 [2023-08-26 12:09:02,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:02,995 INFO L124 PetriNetUnfolderBase]: 83/186 cut-off events. [2023-08-26 12:09:02,995 INFO L125 PetriNetUnfolderBase]: For 2380/2380 co-relation queries the response was YES. [2023-08-26 12:09:02,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 186 events. 83/186 cut-off events. For 2380/2380 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 596 event pairs, 17 based on Foata normal form. 6/192 useless extension candidates. Maximal degree in co-relation 1309. Up to 95 conditions per place. [2023-08-26 12:09:02,997 INFO L140 encePairwiseOnDemand]: 197/204 looper letters, 34 selfloop transitions, 17 changer transitions 12/63 dead transitions. [2023-08-26 12:09:02,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 63 transitions, 881 flow [2023-08-26 12:09:02,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:09:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:09:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 654 transitions. [2023-08-26 12:09:03,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3562091503267974 [2023-08-26 12:09:03,000 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 654 transitions. [2023-08-26 12:09:03,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 654 transitions. [2023-08-26 12:09:03,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:03,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 654 transitions. [2023-08-26 12:09:03,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 72.66666666666667) internal successors, (654), 9 states have internal predecessors, (654), 0 states have call successors, (0), 0 states 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 12:09:03,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states 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 12:09:03,004 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states 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 12:09:03,004 INFO L175 Difference]: Start difference. First operand has 87 places, 47 transitions, 686 flow. Second operand 9 states and 654 transitions. [2023-08-26 12:09:03,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 63 transitions, 881 flow [2023-08-26 12:09:03,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 717 flow, removed 25 selfloop flow, removed 17 redundant places. [2023-08-26 12:09:03,013 INFO L231 Difference]: Finished difference. Result has 75 places, 40 transitions, 471 flow [2023-08-26 12:09:03,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=471, PETRI_PLACES=75, PETRI_TRANSITIONS=40} [2023-08-26 12:09:03,013 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2023-08-26 12:09:03,013 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 40 transitions, 471 flow [2023-08-26 12:09:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.4) internal successors, (694), 10 states have internal predecessors, (694), 0 states have call successors, (0), 0 states 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 12:09:03,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:09:03,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:09:03,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:09:03,014 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:09:03,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:09:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1467495932, now seen corresponding path program 4 times [2023-08-26 12:09:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:09:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752451078] [2023-08-26 12:09:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:09:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:09:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:03,387 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 12:09:03,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:03,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752451078] [2023-08-26 12:09:03,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752451078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:03,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:03,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:09:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872470006] [2023-08-26 12:09:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:03,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:09:03,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:09:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:09:03,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 204 [2023-08-26 12:09:03,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 40 transitions, 471 flow. Second operand has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 12:09:03,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:03,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 204 [2023-08-26 12:09:03,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:03,505 INFO L124 PetriNetUnfolderBase]: 47/118 cut-off events. [2023-08-26 12:09:03,505 INFO L125 PetriNetUnfolderBase]: For 1262/1262 co-relation queries the response was YES. [2023-08-26 12:09:03,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 118 events. 47/118 cut-off events. For 1262/1262 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 314 event pairs, 22 based on Foata normal form. 8/126 useless extension candidates. Maximal degree in co-relation 682. Up to 76 conditions per place. [2023-08-26 12:09:03,506 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 27 selfloop transitions, 8 changer transitions 11/46 dead transitions. [2023-08-26 12:09:03,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 46 transitions, 592 flow [2023-08-26 12:09:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:09:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:09:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2023-08-26 12:09:03,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2023-08-26 12:09:03,508 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2023-08-26 12:09:03,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2023-08-26 12:09:03,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:03,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2023-08-26 12:09:03,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 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 12:09:03,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:09:03,512 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 12:09:03,512 INFO L175 Difference]: Start difference. First operand has 75 places, 40 transitions, 471 flow. Second operand 6 states and 493 transitions. [2023-08-26 12:09:03,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 46 transitions, 592 flow [2023-08-26 12:09:03,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 46 transitions, 462 flow, removed 13 selfloop flow, removed 18 redundant places. [2023-08-26 12:09:03,517 INFO L231 Difference]: Finished difference. Result has 63 places, 34 transitions, 313 flow [2023-08-26 12:09:03,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=63, PETRI_TRANSITIONS=34} [2023-08-26 12:09:03,518 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-26 12:09:03,518 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 34 transitions, 313 flow [2023-08-26 12:09:03,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 12:09:03,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:09:03,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:09:03,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 12:09:03,518 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:09:03,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:09:03,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1751942223, now seen corresponding path program 1 times [2023-08-26 12:09:03,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:09:03,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577401196] [2023-08-26 12:09:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:09:03,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:09:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:04,146 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 12:09:04,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577401196] [2023-08-26 12:09:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577401196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:04,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:04,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:09:04,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295670256] [2023-08-26 12:09:04,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:04,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:09:04,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:04,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:09:04,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:09:04,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 204 [2023-08-26 12:09:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 34 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:04,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:04,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 204 [2023-08-26 12:09:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:04,300 INFO L124 PetriNetUnfolderBase]: 42/110 cut-off events. [2023-08-26 12:09:04,301 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2023-08-26 12:09:04,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 110 events. 42/110 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 288 event pairs, 20 based on Foata normal form. 4/114 useless extension candidates. Maximal degree in co-relation 512. Up to 65 conditions per place. [2023-08-26 12:09:04,302 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 26 selfloop transitions, 2 changer transitions 19/47 dead transitions. [2023-08-26 12:09:04,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 467 flow [2023-08-26 12:09:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:09:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:09:04,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 559 transitions. [2023-08-26 12:09:04,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3914565826330532 [2023-08-26 12:09:04,303 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 559 transitions. [2023-08-26 12:09:04,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 559 transitions. [2023-08-26 12:09:04,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:04,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 559 transitions. [2023-08-26 12:09:04,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.85714285714286) internal successors, (559), 7 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 12:09:04,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:09:04,308 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:09:04,308 INFO L175 Difference]: Start difference. First operand has 63 places, 34 transitions, 313 flow. Second operand 7 states and 559 transitions. [2023-08-26 12:09:04,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 467 flow [2023-08-26 12:09:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 47 transitions, 426 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-26 12:09:04,311 INFO L231 Difference]: Finished difference. Result has 63 places, 27 transitions, 213 flow [2023-08-26 12:09:04,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=63, PETRI_TRANSITIONS=27} [2023-08-26 12:09:04,311 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2023-08-26 12:09:04,311 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 27 transitions, 213 flow [2023-08-26 12:09:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.875) internal successors, (615), 8 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:04,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:09:04,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:09:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 12:09:04,312 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:09:04,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:09:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1903404415, now seen corresponding path program 2 times [2023-08-26 12:09:04,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:09:04,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205140828] [2023-08-26 12:09:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:09:04,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:09:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:04,805 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 12:09:04,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:04,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205140828] [2023-08-26 12:09:04,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205140828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:04,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:04,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:09:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054438502] [2023-08-26 12:09:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:09:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:09:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:09:04,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 204 [2023-08-26 12:09:04,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 27 transitions, 213 flow. Second operand has 8 states, 8 states have (on average 75.875) internal successors, (607), 8 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 12:09:04,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:04,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 204 [2023-08-26 12:09:04,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:04,930 INFO L124 PetriNetUnfolderBase]: 28/82 cut-off events. [2023-08-26 12:09:04,930 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-08-26 12:09:04,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 82 events. 28/82 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 199 event pairs, 4 based on Foata normal form. 4/86 useless extension candidates. Maximal degree in co-relation 371. Up to 22 conditions per place. [2023-08-26 12:09:04,931 INFO L140 encePairwiseOnDemand]: 195/204 looper letters, 24 selfloop transitions, 8 changer transitions 12/44 dead transitions. [2023-08-26 12:09:04,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 44 transitions, 406 flow [2023-08-26 12:09:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:09:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:09:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 705 transitions. [2023-08-26 12:09:04,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3839869281045752 [2023-08-26 12:09:04,940 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 705 transitions. [2023-08-26 12:09:04,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 705 transitions. [2023-08-26 12:09:04,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:04,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 705 transitions. [2023-08-26 12:09:04,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.33333333333333) internal successors, (705), 9 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 12:09:04,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states 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 12:09:04,953 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 204.0) internal successors, (2040), 10 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states 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 12:09:04,953 INFO L175 Difference]: Start difference. First operand has 63 places, 27 transitions, 213 flow. Second operand 9 states and 705 transitions. [2023-08-26 12:09:04,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 44 transitions, 406 flow [2023-08-26 12:09:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 44 transitions, 373 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-26 12:09:04,956 INFO L231 Difference]: Finished difference. Result has 58 places, 25 transitions, 197 flow [2023-08-26 12:09:04,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=197, PETRI_PLACES=58, PETRI_TRANSITIONS=25} [2023-08-26 12:09:04,956 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 28 predicate places. [2023-08-26 12:09:04,956 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 25 transitions, 197 flow [2023-08-26 12:09:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 75.875) internal successors, (607), 8 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 12:09:04,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:09:04,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:09:04,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 12:09:04,957 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [P1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:09:04,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:09:04,957 INFO L85 PathProgramCache]: Analyzing trace with hash -196953629, now seen corresponding path program 3 times [2023-08-26 12:09:04,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:09:04,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960140117] [2023-08-26 12:09:04,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:09:04,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:09:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:09:05,528 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 12:09:05,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:09:05,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960140117] [2023-08-26 12:09:05,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960140117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:09:05,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:09:05,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 12:09:05,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003500730] [2023-08-26 12:09:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:09:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:09:05,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:09:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:09:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:09:05,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 204 [2023-08-26 12:09:05,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 25 transitions, 197 flow. Second operand has 8 states, 8 states have (on average 74.875) internal successors, (599), 8 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:05,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:09:05,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 204 [2023-08-26 12:09:05,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:09:05,655 INFO L124 PetriNetUnfolderBase]: 16/51 cut-off events. [2023-08-26 12:09:05,655 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-08-26 12:09:05,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 51 events. 16/51 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 7 based on Foata normal form. 4/55 useless extension candidates. Maximal degree in co-relation 231. Up to 29 conditions per place. [2023-08-26 12:09:05,656 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-26 12:09:05,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 26 transitions, 246 flow [2023-08-26 12:09:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:09:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:09:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 530 transitions. [2023-08-26 12:09:05,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711484593837535 [2023-08-26 12:09:05,657 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 530 transitions. [2023-08-26 12:09:05,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 530 transitions. [2023-08-26 12:09:05,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:09:05,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 530 transitions. [2023-08-26 12:09:05,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states 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 12:09:05,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:09:05,660 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 204.0) internal successors, (1632), 8 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 12:09:05,660 INFO L175 Difference]: Start difference. First operand has 58 places, 25 transitions, 197 flow. Second operand 7 states and 530 transitions. [2023-08-26 12:09:05,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 26 transitions, 246 flow [2023-08-26 12:09:05,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 26 transitions, 204 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 12:09:05,662 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-26 12:09:05,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-26 12:09:05,662 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-26 12:09:05,662 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-26 12:09:05,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.875) internal successors, (599), 8 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:09:05,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (8 of 9 remaining) [2023-08-26 12:09:05,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 12:09:05,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 12:09:05,665 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 12:09:05,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 12:09:05,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 12:09:05,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 9 remaining) [2023-08-26 12:09:05,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 9 remaining) [2023-08-26 12:09:05,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 12:09:05,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 12:09:05,667 INFO L445 BasicCegarLoop]: Path program histogram: [5, 4, 4, 3, 2, 1, 1, 1, 1] [2023-08-26 12:09:05,671 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:09:05,671 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:09:05,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:09:05 BasicIcfg [2023-08-26 12:09:05,674 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:09:05,674 INFO L158 Benchmark]: Toolchain (without parser) took 26109.19ms. Allocated memory was 339.7MB in the beginning and 851.4MB in the end (delta: 511.7MB). Free memory was 313.6MB in the beginning and 499.0MB in the end (delta: -185.4MB). Peak memory consumption was 325.1MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,674 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 339.7MB. Free memory is still 315.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:09:05,675 INFO L158 Benchmark]: CACSL2BoogieTranslator took 607.91ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 288.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,675 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.76ms. Allocated memory is still 339.7MB. Free memory was 288.0MB in the beginning and 285.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,675 INFO L158 Benchmark]: Boogie Preprocessor took 56.22ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 283.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,675 INFO L158 Benchmark]: RCFGBuilder took 766.55ms. Allocated memory is still 339.7MB. Free memory was 283.1MB in the beginning and 278.9MB in the end (delta: 4.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,675 INFO L158 Benchmark]: TraceAbstraction took 24594.45ms. Allocated memory was 339.7MB in the beginning and 851.4MB in the end (delta: 511.7MB). Free memory was 277.9MB in the beginning and 499.0MB in the end (delta: -221.1MB). Peak memory consumption was 289.5MB. Max. memory is 16.0GB. [2023-08-26 12:09:05,676 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 339.7MB. Free memory is still 315.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 607.91ms. Allocated memory is still 339.7MB. Free memory was 313.6MB in the beginning and 288.5MB in the end (delta: 25.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 77.76ms. Allocated memory is still 339.7MB. Free memory was 288.0MB in the beginning and 285.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 56.22ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 283.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 766.55ms. Allocated memory is still 339.7MB. Free memory was 283.1MB in the beginning and 278.9MB in the end (delta: 4.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 24594.45ms. Allocated memory was 339.7MB in the beginning and 851.4MB in the end (delta: 511.7MB). Free memory was 277.9MB in the beginning and 499.0MB in the end (delta: -221.1MB). Peak memory consumption was 289.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 268]: Unsoundness Warning unspecified type, defaulting to int C: short [268] - GenericResultAtLocation [Line: 268]: Unsoundness Warning unspecified type, defaulting to int C: short [268] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 102 PlacesBefore, 30 PlacesAfterwards, 98 TransitionsBefore, 23 TransitionsAfterwards, 1420 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 104 TotalNumberOfCompositions, 3879 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1359, independent: 1214, independent conditional: 0, independent unconditional: 1214, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 808, independent: 761, independent conditional: 0, independent unconditional: 761, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1359, independent: 453, independent conditional: 0, independent unconditional: 453, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 808, unknown conditional: 0, unknown unconditional: 808] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 120 locations, 9 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 24.5s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 523 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 523 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 270 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2186 IncrementalHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 270 mSolverCounterUnsat, 0 mSDtfsCounter, 2186 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=900occurred in iteration=11, InterpolantAutomatonStates: 146, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 3534 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:09:05,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...