/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/safe016_rmo.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:13:47,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:13:47,601 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 12:13:47,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:13:47,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:13:47,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:13:47,641 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:13:47,641 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:13:47,642 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:13:47,642 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:13:47,642 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:13:47,643 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:13:47,643 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:13:47,643 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:13:47,644 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:13:47,644 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:13:47,644 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:13:47,645 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:13:47,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:13:47,645 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:13:47,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:13:47,651 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:13:47,651 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:13:47,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:13:47,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:13:47,655 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:13:47,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:13:47,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:47,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:13:47,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:13:47,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:13:47,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:13:47,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:13:47,658 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:13:47,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:13:47,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:13:47,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:13:47,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:13:47,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:13:47,960 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:13:47,962 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:13:47,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2023-08-26 12:13:49,122 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:13:49,413 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:13:49,413 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_rmo.oepc.i [2023-08-26 12:13:49,433 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0567b8d17/73e8fd80a8be41db99a970994be37c87/FLAG54df3ce59 [2023-08-26 12:13:49,444 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0567b8d17/73e8fd80a8be41db99a970994be37c87 [2023-08-26 12:13:49,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:13:49,447 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:13:49,448 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:49,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:13:49,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:13:49,451 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:49,452 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc7befc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49, skipping insertion in model container [2023-08-26 12:13:49,452 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:49,500 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:13:49,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:49,852 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:13:49,883 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:13:49,884 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:13:49,934 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:49,965 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:49,965 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:49,971 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:13:49,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49 WrapperNode [2023-08-26 12:13:49,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:49,973 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:49,973 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:13:49,973 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:13:49,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,048 INFO L138 Inliner]: procedures = 177, calls = 86, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 191 [2023-08-26 12:13:50,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:50,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:13:50,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:13:50,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:13:50,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:13:50,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:13:50,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:13:50,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:13:50,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (1/1) ... [2023-08-26 12:13:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:50,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:13:50,142 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 12:13:50,144 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 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:13:50,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:13:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:13:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:13:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:13:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:13:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:13:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:13:50,168 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 12:13:50,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 12:13:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:13:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:13:50,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:13:50,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:13:50,170 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 12:13:50,350 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:13:50,352 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:13:50,821 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:13:51,497 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:13:51,498 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:13:51,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:51 BoogieIcfgContainer [2023-08-26 12:13:51,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:13:51,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:13:51,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:13:51,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:13:51,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:13:49" (1/3) ... [2023-08-26 12:13:51,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e6b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:51, skipping insertion in model container [2023-08-26 12:13:51,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:49" (2/3) ... [2023-08-26 12:13:51,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257e6b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:51, skipping insertion in model container [2023-08-26 12:13:51,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:51" (3/3) ... [2023-08-26 12:13:51,510 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.oepc.i [2023-08-26 12:13:51,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:13:51,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-08-26 12:13:51,527 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:13:51,650 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:13:51,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 196 transitions, 412 flow [2023-08-26 12:13:51,793 INFO L124 PetriNetUnfolderBase]: 3/192 cut-off events. [2023-08-26 12:13:51,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:51,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 3/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 286 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-26 12:13:51,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 196 transitions, 412 flow [2023-08-26 12:13:51,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 192 transitions, 396 flow [2023-08-26 12:13:51,807 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:13:51,815 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 192 transitions, 396 flow [2023-08-26 12:13:51,817 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 192 transitions, 396 flow [2023-08-26 12:13:51,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 192 transitions, 396 flow [2023-08-26 12:13:51,864 INFO L124 PetriNetUnfolderBase]: 3/192 cut-off events. [2023-08-26 12:13:51,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:51,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 3/192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 288 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2023-08-26 12:13:51,870 INFO L119 LiptonReduction]: Number of co-enabled transitions 8116 [2023-08-26 12:14:18,077 INFO L134 LiptonReduction]: Checked pairs total: 39435 [2023-08-26 12:14:18,078 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-26 12:14:18,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:14:18,094 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;@7460f9d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:14:18,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-08-26 12:14:18,096 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:14:18,096 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:14:18,096 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:14:18,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:18,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:14:18,097 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:18,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1096, now seen corresponding path program 1 times [2023-08-26 12:14:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:18,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311362007] [2023-08-26 12:14:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:18,197 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 12:14:18,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:18,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311362007] [2023-08-26 12:14:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311362007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:18,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:14:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134592076] [2023-08-26 12:14:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:18,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:14:18,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:14:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:14:18,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 351 [2023-08-26 12:14:18,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 12:14:18,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:18,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 351 [2023-08-26 12:14:18,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:29,966 INFO L124 PetriNetUnfolderBase]: 69742/91810 cut-off events. [2023-08-26 12:14:29,967 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 12:14:30,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183861 conditions, 91810 events. 69742/91810 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6628. Compared 604691 event pairs, 69742 based on Foata normal form. 1200/48216 useless extension candidates. Maximal degree in co-relation 183849. Up to 91764 conditions per place. [2023-08-26 12:14:30,596 INFO L140 encePairwiseOnDemand]: 321/351 looper letters, 50 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-08-26 12:14:30,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 220 flow [2023-08-26 12:14:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:14:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:14:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2023-08-26 12:14:30,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270655270655271 [2023-08-26 12:14:30,612 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2023-08-26 12:14:30,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2023-08-26 12:14:30,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:30,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2023-08-26 12:14:30,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:30,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 12:14:30,622 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 351.0) internal successors, (1053), 3 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states 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 12:14:30,624 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 182 flow. Second operand 2 states and 370 transitions. [2023-08-26 12:14:30,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 220 flow [2023-08-26 12:14:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:14:30,649 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 116 flow [2023-08-26 12:14:30,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-26 12:14:30,654 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -32 predicate places. [2023-08-26 12:14:30,654 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 116 flow [2023-08-26 12:14:30,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 12:14:30,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:30,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:14:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:14:30,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:30,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1080421, now seen corresponding path program 1 times [2023-08-26 12:14:30,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:30,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826826264] [2023-08-26 12:14:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:30,915 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 12:14:30,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:30,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826826264] [2023-08-26 12:14:30,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826826264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:30,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:30,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:30,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530038367] [2023-08-26 12:14:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:30,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:30,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:30,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 351 [2023-08-26 12:14:30,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 12:14:30,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:30,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 351 [2023-08-26 12:14:30,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:39,337 INFO L124 PetriNetUnfolderBase]: 56695/76906 cut-off events. [2023-08-26 12:14:39,337 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:14:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153679 conditions, 76906 events. 56695/76906 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 491397 event pairs, 36791 based on Foata normal form. 0/49677 useless extension candidates. Maximal degree in co-relation 153676. Up to 49002 conditions per place. [2023-08-26 12:14:39,768 INFO L140 encePairwiseOnDemand]: 331/351 looper letters, 61 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2023-08-26 12:14:39,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 294 flow [2023-08-26 12:14:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-26 12:14:39,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2023-08-26 12:14:39,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-26 12:14:39,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-26 12:14:39,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:39,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-26 12:14:39,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 12:14:39,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:39,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:39,782 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 116 flow. Second operand 3 states and 432 transitions. [2023-08-26 12:14:39,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 294 flow [2023-08-26 12:14:39,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 294 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:14:39,786 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 196 flow [2023-08-26 12:14:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-26 12:14:39,788 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -31 predicate places. [2023-08-26 12:14:39,789 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 196 flow [2023-08-26 12:14:39,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 12:14:39,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:39,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:14:39,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:14:39,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:39,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1080422, now seen corresponding path program 1 times [2023-08-26 12:14:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658956808] [2023-08-26 12:14:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:39,938 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 12:14:39,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:39,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658956808] [2023-08-26 12:14:39,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658956808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:39,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:39,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124445787] [2023-08-26 12:14:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:39,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:39,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:39,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:39,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:39,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 351 [2023-08-26 12:14:39,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 12:14:39,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:39,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 351 [2023-08-26 12:14:39,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:42,294 INFO L124 PetriNetUnfolderBase]: 16483/23232 cut-off events. [2023-08-26 12:14:42,294 INFO L125 PetriNetUnfolderBase]: For 5966/5966 co-relation queries the response was YES. [2023-08-26 12:14:42,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62633 conditions, 23232 events. 16483/23232 cut-off events. For 5966/5966 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 140593 event pairs, 13171 based on Foata normal form. 5655/27446 useless extension candidates. Maximal degree in co-relation 62628. Up to 22991 conditions per place. [2023-08-26 12:14:42,463 INFO L140 encePairwiseOnDemand]: 340/351 looper letters, 46 selfloop transitions, 1 changer transitions 1/49 dead transitions. [2023-08-26 12:14:42,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 272 flow [2023-08-26 12:14:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:42,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2023-08-26 12:14:42,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2023-08-26 12:14:42,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2023-08-26 12:14:42,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2023-08-26 12:14:42,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:42,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2023-08-26 12:14:42,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states 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 12:14:42,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:42,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:42,470 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 196 flow. Second operand 3 states and 416 transitions. [2023-08-26 12:14:42,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 272 flow [2023-08-26 12:14:42,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:42,517 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 156 flow [2023-08-26 12:14:42,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-26 12:14:42,519 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -41 predicate places. [2023-08-26 12:14:42,519 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 156 flow [2023-08-26 12:14:42,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states 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 12:14:42,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:42,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:14:42,523 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:42,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:42,524 INFO L85 PathProgramCache]: Analyzing trace with hash -375358447, now seen corresponding path program 1 times [2023-08-26 12:14:42,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:42,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134730711] [2023-08-26 12:14:42,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:42,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:42,869 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 12:14:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:42,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134730711] [2023-08-26 12:14:42,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134730711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:42,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:42,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053033125] [2023-08-26 12:14:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:42,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:42,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 12:14:42,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:42,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 12:14:42,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:45,484 INFO L124 PetriNetUnfolderBase]: 20593/28536 cut-off events. [2023-08-26 12:14:45,484 INFO L125 PetriNetUnfolderBase]: For 9323/9807 co-relation queries the response was YES. [2023-08-26 12:14:45,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71583 conditions, 28536 events. 20593/28536 cut-off events. For 9323/9807 co-relation queries the response was YES. Maximal size of possible extension queue 1411. Compared 180520 event pairs, 3228 based on Foata normal form. 136/24346 useless extension candidates. Maximal degree in co-relation 71578. Up to 24572 conditions per place. [2023-08-26 12:14:45,630 INFO L140 encePairwiseOnDemand]: 347/351 looper letters, 82 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-26 12:14:45,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 454 flow [2023-08-26 12:14:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:45,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 492 transitions. [2023-08-26 12:14:45,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4672364672364672 [2023-08-26 12:14:45,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 492 transitions. [2023-08-26 12:14:45,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 492 transitions. [2023-08-26 12:14:45,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:45,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 492 transitions. [2023-08-26 12:14:45,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states 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 12:14:45,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:45,637 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:45,637 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 156 flow. Second operand 3 states and 492 transitions. [2023-08-26 12:14:45,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 454 flow [2023-08-26 12:14:45,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:45,639 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 174 flow [2023-08-26 12:14:45,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2023-08-26 12:14:45,640 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -40 predicate places. [2023-08-26 12:14:45,640 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 174 flow [2023-08-26 12:14:45,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:45,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:45,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:14:45,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:45,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -375358791, now seen corresponding path program 1 times [2023-08-26 12:14:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:45,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268324646] [2023-08-26 12:14:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:45,741 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 12:14:45,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:45,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268324646] [2023-08-26 12:14:45,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268324646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:45,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:45,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:45,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447134627] [2023-08-26 12:14:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:45,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:45,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:45,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 351 [2023-08-26 12:14:45,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 12:14:45,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:45,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 351 [2023-08-26 12:14:45,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:47,763 INFO L124 PetriNetUnfolderBase]: 18150/25775 cut-off events. [2023-08-26 12:14:47,764 INFO L125 PetriNetUnfolderBase]: For 6122/6333 co-relation queries the response was YES. [2023-08-26 12:14:47,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68502 conditions, 25775 events. 18150/25775 cut-off events. For 6122/6333 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 161268 event pairs, 8009 based on Foata normal form. 0/22031 useless extension candidates. Maximal degree in co-relation 68496. Up to 16392 conditions per place. [2023-08-26 12:14:47,921 INFO L140 encePairwiseOnDemand]: 347/351 looper letters, 78 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-26 12:14:47,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 455 flow [2023-08-26 12:14:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-26 12:14:47,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757834757834758 [2023-08-26 12:14:47,923 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-26 12:14:47,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-26 12:14:47,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:47,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-26 12:14:47,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states 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 12:14:47,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:47,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:47,928 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 174 flow. Second operand 3 states and 501 transitions. [2023-08-26 12:14:47,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 455 flow [2023-08-26 12:14:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 451 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:47,931 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 184 flow [2023-08-26 12:14:47,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 12:14:47,931 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -38 predicate places. [2023-08-26 12:14:47,932 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 184 flow [2023-08-26 12:14:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states 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 12:14:47,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:47,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:47,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:14:47,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:47,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1248787908, now seen corresponding path program 1 times [2023-08-26 12:14:47,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:47,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884151213] [2023-08-26 12:14:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:47,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:48,057 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 12:14:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884151213] [2023-08-26 12:14:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884151213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:48,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:48,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:14:48,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433780820] [2023-08-26 12:14:48,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:48,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 351 [2023-08-26 12:14:48,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 12:14:48,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:48,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 351 [2023-08-26 12:14:48,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:50,295 INFO L124 PetriNetUnfolderBase]: 20637/29354 cut-off events. [2023-08-26 12:14:50,296 INFO L125 PetriNetUnfolderBase]: For 8620/8620 co-relation queries the response was YES. [2023-08-26 12:14:50,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80164 conditions, 29354 events. 20637/29354 cut-off events. For 8620/8620 co-relation queries the response was YES. Maximal size of possible extension queue 1509. Compared 185308 event pairs, 8987 based on Foata normal form. 0/26834 useless extension candidates. Maximal degree in co-relation 80157. Up to 19466 conditions per place. [2023-08-26 12:14:50,521 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 69 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2023-08-26 12:14:50,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 414 flow [2023-08-26 12:14:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:50,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-26 12:14:50,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39316239316239315 [2023-08-26 12:14:50,522 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-26 12:14:50,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-26 12:14:50,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:50,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-26 12:14:50,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:50,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:50,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:14:50,526 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 184 flow. Second operand 3 states and 414 transitions. [2023-08-26 12:14:50,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 414 flow [2023-08-26 12:14:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:50,535 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 216 flow [2023-08-26 12:14:50,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-26 12:14:50,536 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -38 predicate places. [2023-08-26 12:14:50,536 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 216 flow [2023-08-26 12:14:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states 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 12:14:50,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:50,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:14:50,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:50,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1248787909, now seen corresponding path program 1 times [2023-08-26 12:14:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674751477] [2023-08-26 12:14:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:50,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:50,832 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 12:14:50,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:50,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674751477] [2023-08-26 12:14:50,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674751477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:50,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:50,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:14:50,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013172395] [2023-08-26 12:14:50,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:50,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:14:50,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:50,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:14:50,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:14:50,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 351 [2023-08-26 12:14:50,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 12:14:50,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:50,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 351 [2023-08-26 12:14:50,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:54,475 INFO L124 PetriNetUnfolderBase]: 29987/42596 cut-off events. [2023-08-26 12:14:54,476 INFO L125 PetriNetUnfolderBase]: For 19469/19469 co-relation queries the response was YES. [2023-08-26 12:14:54,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120318 conditions, 42596 events. 29987/42596 cut-off events. For 19469/19469 co-relation queries the response was YES. Maximal size of possible extension queue 2220. Compared 281008 event pairs, 15561 based on Foata normal form. 160/38796 useless extension candidates. Maximal degree in co-relation 120310. Up to 21927 conditions per place. [2023-08-26 12:14:54,847 INFO L140 encePairwiseOnDemand]: 345/351 looper letters, 86 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2023-08-26 12:14:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 545 flow [2023-08-26 12:14:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:14:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:14:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2023-08-26 12:14:54,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396011396011396 [2023-08-26 12:14:54,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2023-08-26 12:14:54,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2023-08-26 12:14:54,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:54,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2023-08-26 12:14:54,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states 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 12:14:54,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:14:54,854 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:14:54,854 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 216 flow. Second operand 4 states and 556 transitions. [2023-08-26 12:14:54,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 545 flow [2023-08-26 12:14:55,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 538 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:55,237 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2023-08-26 12:14:55,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 12:14:55,238 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -35 predicate places. [2023-08-26 12:14:55,238 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2023-08-26 12:14:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states 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 12:14:55,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:55,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:14:55,239 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:55,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1227267103, now seen corresponding path program 2 times [2023-08-26 12:14:55,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:55,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309117136] [2023-08-26 12:14:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:55,575 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 12:14:55,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:55,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309117136] [2023-08-26 12:14:55,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309117136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:55,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:55,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:14:55,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616920571] [2023-08-26 12:14:55,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:55,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:14:55,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:55,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:14:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:14:55,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 351 [2023-08-26 12:14:55,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 12:14:55,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:55,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 351 [2023-08-26 12:14:55,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:59,262 INFO L124 PetriNetUnfolderBase]: 29558/42007 cut-off events. [2023-08-26 12:14:59,263 INFO L125 PetriNetUnfolderBase]: For 24139/24139 co-relation queries the response was YES. [2023-08-26 12:14:59,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118722 conditions, 42007 events. 29558/42007 cut-off events. For 24139/24139 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 277118 event pairs, 14191 based on Foata normal form. 160/38206 useless extension candidates. Maximal degree in co-relation 118713. Up to 32868 conditions per place. [2023-08-26 12:14:59,529 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 87 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2023-08-26 12:14:59,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 549 flow [2023-08-26 12:14:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:14:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:14:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-26 12:14:59,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 12:14:59,532 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-26 12:14:59,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-26 12:14:59,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:59,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-26 12:14:59,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 12:14:59,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:14:59,535 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:14:59,535 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 4 states and 546 transitions. [2023-08-26 12:14:59,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 549 flow [2023-08-26 12:14:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 539 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:14:59,599 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 231 flow [2023-08-26 12:14:59,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2023-08-26 12:14:59,604 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -36 predicate places. [2023-08-26 12:14:59,604 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 231 flow [2023-08-26 12:14:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 12:14:59,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:59,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:59,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:14:59,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:14:59,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1489263923, now seen corresponding path program 1 times [2023-08-26 12:14:59,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:59,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221359796] [2023-08-26 12:14:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:59,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:01,293 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 12:15:01,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221359796] [2023-08-26 12:15:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221359796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:15:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320587737] [2023-08-26 12:15:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:01,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:15:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:15:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:15:01,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 351 [2023-08-26 12:15:01,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 231 flow. Second operand has 9 states, 9 states have (on average 103.66666666666667) internal successors, (933), 9 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 12:15:01,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:01,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 351 [2023-08-26 12:15:01,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:04,987 INFO L124 PetriNetUnfolderBase]: 29289/41605 cut-off events. [2023-08-26 12:15:04,987 INFO L125 PetriNetUnfolderBase]: For 24097/24097 co-relation queries the response was YES. [2023-08-26 12:15:05,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117855 conditions, 41605 events. 29289/41605 cut-off events. For 24097/24097 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 273001 event pairs, 17730 based on Foata normal form. 2/37646 useless extension candidates. Maximal degree in co-relation 117847. Up to 40778 conditions per place. [2023-08-26 12:15:05,217 INFO L140 encePairwiseOnDemand]: 341/351 looper letters, 76 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2023-08-26 12:15:05,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 97 transitions, 597 flow [2023-08-26 12:15:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:15:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:15:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 897 transitions. [2023-08-26 12:15:05,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3194444444444444 [2023-08-26 12:15:05,219 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 897 transitions. [2023-08-26 12:15:05,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 897 transitions. [2023-08-26 12:15:05,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:05,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 897 transitions. [2023-08-26 12:15:05,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.125) internal successors, (897), 8 states have internal predecessors, (897), 0 states have call successors, (0), 0 states 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 12:15:05,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 12:15:05,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 351.0) internal successors, (3159), 9 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states 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 12:15:05,226 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 231 flow. Second operand 8 states and 897 transitions. [2023-08-26 12:15:05,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 97 transitions, 597 flow [2023-08-26 12:15:05,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 97 transitions, 587 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:05,270 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 394 flow [2023-08-26 12:15:05,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2023-08-26 12:15:05,271 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -27 predicate places. [2023-08-26 12:15:05,271 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 394 flow [2023-08-26 12:15:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.66666666666667) internal successors, (933), 9 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 12:15:05,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:05,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:05,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:15:05,272 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:05,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:05,273 INFO L85 PathProgramCache]: Analyzing trace with hash -425802077, now seen corresponding path program 1 times [2023-08-26 12:15:05,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698703993] [2023-08-26 12:15:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:05,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:05,684 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 12:15:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:05,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698703993] [2023-08-26 12:15:05,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698703993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:05,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:05,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:05,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623376513] [2023-08-26 12:15:05,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:05,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:05,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:05,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:05,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:05,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 12:15:05,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 12:15:05,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:05,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 12:15:05,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:09,644 INFO L124 PetriNetUnfolderBase]: 32432/46223 cut-off events. [2023-08-26 12:15:09,645 INFO L125 PetriNetUnfolderBase]: For 36752/36906 co-relation queries the response was YES. [2023-08-26 12:15:09,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138067 conditions, 46223 events. 32432/46223 cut-off events. For 36752/36906 co-relation queries the response was YES. Maximal size of possible extension queue 2172. Compared 307631 event pairs, 7248 based on Foata normal form. 102/42546 useless extension candidates. Maximal degree in co-relation 138055. Up to 37738 conditions per place. [2023-08-26 12:15:10,229 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 129 selfloop transitions, 10 changer transitions 0/142 dead transitions. [2023-08-26 12:15:10,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 142 transitions, 984 flow [2023-08-26 12:15:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:10,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 646 transitions. [2023-08-26 12:15:10,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601139601139601 [2023-08-26 12:15:10,231 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 646 transitions. [2023-08-26 12:15:10,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 646 transitions. [2023-08-26 12:15:10,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:10,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 646 transitions. [2023-08-26 12:15:10,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:10,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:15:10,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:15:10,236 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 394 flow. Second operand 4 states and 646 transitions. [2023-08-26 12:15:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 142 transitions, 984 flow [2023-08-26 12:15:10,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 966 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-26 12:15:10,371 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 435 flow [2023-08-26 12:15:10,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=435, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-26 12:15:10,372 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -22 predicate places. [2023-08-26 12:15:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 435 flow [2023-08-26 12:15:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states 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 12:15:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:10,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:10,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:15:10,373 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:10,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -153658472, now seen corresponding path program 1 times [2023-08-26 12:15:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664512236] [2023-08-26 12:15:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:10,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:10,714 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 12:15:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:10,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664512236] [2023-08-26 12:15:10,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664512236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:15:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544787954] [2023-08-26 12:15:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:10,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:10,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:10,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:10,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 351 [2023-08-26 12:15:10,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 435 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 12:15:10,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:10,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 351 [2023-08-26 12:15:10,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:14,637 INFO L124 PetriNetUnfolderBase]: 29500/42873 cut-off events. [2023-08-26 12:15:14,637 INFO L125 PetriNetUnfolderBase]: For 41468/41777 co-relation queries the response was YES. [2023-08-26 12:15:14,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134833 conditions, 42873 events. 29500/42873 cut-off events. For 41468/41777 co-relation queries the response was YES. Maximal size of possible extension queue 2186. Compared 294210 event pairs, 16684 based on Foata normal form. 165/39264 useless extension candidates. Maximal degree in co-relation 134818. Up to 33015 conditions per place. [2023-08-26 12:15:14,981 INFO L140 encePairwiseOnDemand]: 348/351 looper letters, 92 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2023-08-26 12:15:14,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 764 flow [2023-08-26 12:15:14,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 494 transitions. [2023-08-26 12:15:14,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2023-08-26 12:15:14,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 494 transitions. [2023-08-26 12:15:14,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 494 transitions. [2023-08-26 12:15:14,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:14,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 494 transitions. [2023-08-26 12:15:14,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 0 states have call successors, (0), 0 states 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 12:15:14,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:15:14,987 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 351.0) internal successors, (1404), 4 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states 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 12:15:14,987 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 435 flow. Second operand 3 states and 494 transitions. [2023-08-26 12:15:14,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 764 flow [2023-08-26 12:15:15,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 108 transitions, 754 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:15,164 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 455 flow [2023-08-26 12:15:15,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2023-08-26 12:15:15,164 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -20 predicate places. [2023-08-26 12:15:15,164 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 455 flow [2023-08-26 12:15:15,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states 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 12:15:15,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:15,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:15:15,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:15,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 57803208, now seen corresponding path program 1 times [2023-08-26 12:15:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122516134] [2023-08-26 12:15:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:15,317 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 12:15:15,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:15,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122516134] [2023-08-26 12:15:15,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122516134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:15,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:15,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:15:15,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525757276] [2023-08-26 12:15:15,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:15,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:15:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:15:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:15:15,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 351 [2023-08-26 12:15:15,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 12:15:15,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:15,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 351 [2023-08-26 12:15:15,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:19,335 INFO L124 PetriNetUnfolderBase]: 27052/38725 cut-off events. [2023-08-26 12:15:19,336 INFO L125 PetriNetUnfolderBase]: For 41486/41625 co-relation queries the response was YES. [2023-08-26 12:15:19,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123202 conditions, 38725 events. 27052/38725 cut-off events. For 41486/41625 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 248635 event pairs, 8121 based on Foata normal form. 306/36349 useless extension candidates. Maximal degree in co-relation 123186. Up to 15691 conditions per place. [2023-08-26 12:15:19,601 INFO L140 encePairwiseOnDemand]: 334/351 looper letters, 83 selfloop transitions, 20 changer transitions 0/107 dead transitions. [2023-08-26 12:15:19,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 826 flow [2023-08-26 12:15:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-26 12:15:19,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732193732193732 [2023-08-26 12:15:19,603 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-26 12:15:19,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-26 12:15:19,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:19,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-26 12:15:19,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 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 12:15:19,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:15:19,606 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states 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 12:15:19,606 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 455 flow. Second operand 4 states and 524 transitions. [2023-08-26 12:15:19,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 826 flow [2023-08-26 12:15:19,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 802 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:19,750 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 591 flow [2023-08-26 12:15:19,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=591, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-08-26 12:15:19,751 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -17 predicate places. [2023-08-26 12:15:19,751 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 591 flow [2023-08-26 12:15:19,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states 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 12:15:19,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:19,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:19,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:15:19,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:19,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1867996914, now seen corresponding path program 1 times [2023-08-26 12:15:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:19,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565721503] [2023-08-26 12:15:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:19,908 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 12:15:19,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:19,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565721503] [2023-08-26 12:15:19,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565721503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:19,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:19,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:15:19,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239242694] [2023-08-26 12:15:19,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:19,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:19,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:19,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 351 [2023-08-26 12:15:19,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 591 flow. Second operand has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 12:15:19,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:19,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 351 [2023-08-26 12:15:19,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:26,516 INFO L124 PetriNetUnfolderBase]: 45758/65740 cut-off events. [2023-08-26 12:15:26,516 INFO L125 PetriNetUnfolderBase]: For 148901/151163 co-relation queries the response was YES. [2023-08-26 12:15:26,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231030 conditions, 65740 events. 45758/65740 cut-off events. For 148901/151163 co-relation queries the response was YES. Maximal size of possible extension queue 3383. Compared 486916 event pairs, 4813 based on Foata normal form. 1047/63946 useless extension candidates. Maximal degree in co-relation 231013. Up to 26551 conditions per place. [2023-08-26 12:15:27,019 INFO L140 encePairwiseOnDemand]: 346/351 looper letters, 208 selfloop transitions, 10 changer transitions 0/222 dead transitions. [2023-08-26 12:15:27,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 222 transitions, 1930 flow [2023-08-26 12:15:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:15:27,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:15:27,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 818 transitions. [2023-08-26 12:15:27,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46609686609686607 [2023-08-26 12:15:27,021 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 818 transitions. [2023-08-26 12:15:27,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 818 transitions. [2023-08-26 12:15:27,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:27,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 818 transitions. [2023-08-26 12:15:27,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 12:15:27,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states 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 12:15:27,026 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 351.0) internal successors, (2106), 6 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states 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 12:15:27,026 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 591 flow. Second operand 5 states and 818 transitions. [2023-08-26 12:15:27,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 222 transitions, 1930 flow [2023-08-26 12:15:27,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 222 transitions, 1921 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:27,573 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 626 flow [2023-08-26 12:15:27,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=626, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-26 12:15:27,574 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, -12 predicate places. [2023-08-26 12:15:27,574 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 626 flow [2023-08-26 12:15:27,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 12:15:27,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:27,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:27,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:15:27,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:27,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1533044275, now seen corresponding path program 1 times [2023-08-26 12:15:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:27,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371309757] [2023-08-26 12:15:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:29,373 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 12:15:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371309757] [2023-08-26 12:15:29,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371309757] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:29,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:29,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 12:15:29,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529978405] [2023-08-26 12:15:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 12:15:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 12:15:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-26 12:15:29,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 351 [2023-08-26 12:15:29,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 84 transitions, 626 flow. Second operand has 11 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 12:15:29,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:29,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 351 [2023-08-26 12:15:29,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:36,860 INFO L124 PetriNetUnfolderBase]: 51493/72928 cut-off events. [2023-08-26 12:15:36,861 INFO L125 PetriNetUnfolderBase]: For 155554/155554 co-relation queries the response was YES. [2023-08-26 12:15:37,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270313 conditions, 72928 events. 51493/72928 cut-off events. For 155554/155554 co-relation queries the response was YES. Maximal size of possible extension queue 3244. Compared 494650 event pairs, 19526 based on Foata normal form. 17/71001 useless extension candidates. Maximal degree in co-relation 270293. Up to 69433 conditions per place. [2023-08-26 12:15:37,484 INFO L140 encePairwiseOnDemand]: 331/351 looper letters, 161 selfloop transitions, 91 changer transitions 0/252 dead transitions. [2023-08-26 12:15:37,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 252 transitions, 2408 flow [2023-08-26 12:15:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 12:15:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 12:15:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1229 transitions. [2023-08-26 12:15:37,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3183113183113183 [2023-08-26 12:15:37,488 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1229 transitions. [2023-08-26 12:15:37,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1229 transitions. [2023-08-26 12:15:37,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:37,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1229 transitions. [2023-08-26 12:15:37,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 111.72727272727273) internal successors, (1229), 11 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states 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 12:15:37,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 12:15:37,496 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 351.0) internal successors, (4212), 12 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states 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 12:15:37,496 INFO L175 Difference]: Start difference. First operand has 84 places, 84 transitions, 626 flow. Second operand 11 states and 1229 transitions. [2023-08-26 12:15:37,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 252 transitions, 2408 flow [2023-08-26 12:15:38,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 252 transitions, 2374 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:38,241 INFO L231 Difference]: Finished difference. Result has 102 places, 173 transitions, 1721 flow [2023-08-26 12:15:38,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1721, PETRI_PLACES=102, PETRI_TRANSITIONS=173} [2023-08-26 12:15:38,242 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 6 predicate places. [2023-08-26 12:15:38,242 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 173 transitions, 1721 flow [2023-08-26 12:15:38,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 100.54545454545455) internal successors, (1106), 11 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states 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 12:15:38,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:15:38,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:38,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 625906293, now seen corresponding path program 2 times [2023-08-26 12:15:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90406720] [2023-08-26 12:15:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:39,739 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 12:15:39,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:39,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90406720] [2023-08-26 12:15:39,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90406720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:39,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:39,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:15:39,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328300675] [2023-08-26 12:15:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:15:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:15:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:15:39,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 351 [2023-08-26 12:15:39,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 173 transitions, 1721 flow. Second operand has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 12:15:39,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:39,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 351 [2023-08-26 12:15:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:47,643 INFO L124 PetriNetUnfolderBase]: 48280/68637 cut-off events. [2023-08-26 12:15:47,643 INFO L125 PetriNetUnfolderBase]: For 166413/167156 co-relation queries the response was YES. [2023-08-26 12:15:48,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272306 conditions, 68637 events. 48280/68637 cut-off events. For 166413/167156 co-relation queries the response was YES. Maximal size of possible extension queue 3490. Compared 478659 event pairs, 28204 based on Foata normal form. 118/66788 useless extension candidates. Maximal degree in co-relation 272276. Up to 65348 conditions per place. [2023-08-26 12:15:48,308 INFO L140 encePairwiseOnDemand]: 340/351 looper letters, 213 selfloop transitions, 45 changer transitions 0/275 dead transitions. [2023-08-26 12:15:48,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 275 transitions, 3038 flow [2023-08-26 12:15:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 12:15:48,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 12:15:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 996 transitions. [2023-08-26 12:15:48,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.315289648622982 [2023-08-26 12:15:48,312 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 996 transitions. [2023-08-26 12:15:48,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 996 transitions. [2023-08-26 12:15:48,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:48,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 996 transitions. [2023-08-26 12:15:48,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.66666666666667) internal successors, (996), 9 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:48,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states 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 12:15:48,318 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 351.0) internal successors, (3510), 10 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states 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 12:15:48,318 INFO L175 Difference]: Start difference. First operand has 102 places, 173 transitions, 1721 flow. Second operand 9 states and 996 transitions. [2023-08-26 12:15:48,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 275 transitions, 3038 flow [2023-08-26 12:15:50,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 275 transitions, 3028 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-26 12:15:50,048 INFO L231 Difference]: Finished difference. Result has 116 places, 212 transitions, 2288 flow [2023-08-26 12:15:50,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=1711, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2288, PETRI_PLACES=116, PETRI_TRANSITIONS=212} [2023-08-26 12:15:50,048 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 20 predicate places. [2023-08-26 12:15:50,048 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 212 transitions, 2288 flow [2023-08-26 12:15:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states 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 12:15:50,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:50,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:50,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:15:50,049 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:15:50,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1153448045, now seen corresponding path program 3 times [2023-08-26 12:15:50,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:50,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885670196] [2023-08-26 12:15:50,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:50,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:51,168 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 12:15:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:51,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885670196] [2023-08-26 12:15:51,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885670196] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:51,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:51,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 12:15:51,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992381957] [2023-08-26 12:15:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 12:15:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 12:15:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-08-26 12:15:51,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 351 [2023-08-26 12:15:51,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 212 transitions, 2288 flow. Second operand has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:51,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:51,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 351 [2023-08-26 12:15:51,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:59,591 INFO L124 PetriNetUnfolderBase]: 47925/68358 cut-off events. [2023-08-26 12:15:59,592 INFO L125 PetriNetUnfolderBase]: For 198965/199344 co-relation queries the response was YES. [2023-08-26 12:16:00,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283057 conditions, 68358 events. 47925/68358 cut-off events. For 198965/199344 co-relation queries the response was YES. Maximal size of possible extension queue 3368. Compared 480698 event pairs, 12261 based on Foata normal form. 234/66690 useless extension candidates. Maximal degree in co-relation 283020. Up to 58563 conditions per place. [2023-08-26 12:16:00,368 INFO L140 encePairwiseOnDemand]: 337/351 looper letters, 189 selfloop transitions, 154 changer transitions 0/360 dead transitions. [2023-08-26 12:16:00,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 360 transitions, 4232 flow [2023-08-26 12:16:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 12:16:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 12:16:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1478 transitions. [2023-08-26 12:16:00,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32390970852509315 [2023-08-26 12:16:00,372 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1478 transitions. [2023-08-26 12:16:00,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1478 transitions. [2023-08-26 12:16:00,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:00,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1478 transitions. [2023-08-26 12:16:00,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 113.6923076923077) internal successors, (1478), 13 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states 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 12:16:00,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 351.0) internal successors, (4914), 14 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states 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 12:16:00,381 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 351.0) internal successors, (4914), 14 states have internal predecessors, (4914), 0 states have call successors, (0), 0 states 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 12:16:00,381 INFO L175 Difference]: Start difference. First operand has 116 places, 212 transitions, 2288 flow. Second operand 13 states and 1478 transitions. [2023-08-26 12:16:00,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 360 transitions, 4232 flow [2023-08-26 12:16:02,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 360 transitions, 4177 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-08-26 12:16:02,290 INFO L231 Difference]: Finished difference. Result has 135 places, 258 transitions, 3267 flow [2023-08-26 12:16:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3267, PETRI_PLACES=135, PETRI_TRANSITIONS=258} [2023-08-26 12:16:02,291 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 39 predicate places. [2023-08-26 12:16:02,291 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 258 transitions, 3267 flow [2023-08-26 12:16:02,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 105.7) internal successors, (1057), 10 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:02,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:02,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:02,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:16:02,292 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:16:02,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:02,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1791901379, now seen corresponding path program 1 times [2023-08-26 12:16:02,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:02,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829526697] [2023-08-26 12:16:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:02,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:02,468 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 12:16:02,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:02,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829526697] [2023-08-26 12:16:02,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829526697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:02,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:02,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:16:02,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766595106] [2023-08-26 12:16:02,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:02,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:16:02,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:16:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:16:02,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 351 [2023-08-26 12:16:02,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 258 transitions, 3267 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:02,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:02,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 351 [2023-08-26 12:16:02,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:16:10,176 INFO L124 PetriNetUnfolderBase]: 40531/58179 cut-off events. [2023-08-26 12:16:10,176 INFO L125 PetriNetUnfolderBase]: For 230763/231049 co-relation queries the response was YES. [2023-08-26 12:16:10,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262075 conditions, 58179 events. 40531/58179 cut-off events. For 230763/231049 co-relation queries the response was YES. Maximal size of possible extension queue 2649. Compared 397621 event pairs, 10669 based on Foata normal form. 887/57775 useless extension candidates. Maximal degree in co-relation 262030. Up to 19465 conditions per place. [2023-08-26 12:16:10,909 INFO L140 encePairwiseOnDemand]: 333/351 looper letters, 244 selfloop transitions, 80 changer transitions 0/341 dead transitions. [2023-08-26 12:16:10,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 341 transitions, 4779 flow [2023-08-26 12:16:10,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:16:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:16:10,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 752 transitions. [2023-08-26 12:16:10,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3570750237416904 [2023-08-26 12:16:10,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 752 transitions. [2023-08-26 12:16:10,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 752 transitions. [2023-08-26 12:16:10,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:16:10,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 752 transitions. [2023-08-26 12:16:10,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states 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 12:16:10,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states 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 12:16:10,916 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 351.0) internal successors, (2457), 7 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states 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 12:16:10,916 INFO L175 Difference]: Start difference. First operand has 135 places, 258 transitions, 3267 flow. Second operand 6 states and 752 transitions. [2023-08-26 12:16:10,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 341 transitions, 4779 flow [2023-08-26 12:16:14,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 341 transitions, 4618 flow, removed 74 selfloop flow, removed 2 redundant places. [2023-08-26 12:16:14,537 INFO L231 Difference]: Finished difference. Result has 140 places, 282 transitions, 3879 flow [2023-08-26 12:16:14,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=351, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3879, PETRI_PLACES=140, PETRI_TRANSITIONS=282} [2023-08-26 12:16:14,537 INFO L281 CegarLoopForPetriNet]: 96 programPoint places, 44 predicate places. [2023-08-26 12:16:14,537 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 282 transitions, 3879 flow [2023-08-26 12:16:14,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:16:14,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:16:14,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:16:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:16:14,539 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-08-26 12:16:14,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:16:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash -195142135, now seen corresponding path program 1 times [2023-08-26 12:16:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:16:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070081651] [2023-08-26 12:16:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:16:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:16:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:16:15,140 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 12:16:15,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:16:15,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070081651] [2023-08-26 12:16:15,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070081651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:16:15,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:16:15,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:16:15,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930951520] [2023-08-26 12:16:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:16:15,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:16:15,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:16:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:16:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:16:15,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 351 [2023-08-26 12:16:15,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 282 transitions, 3879 flow. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states 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 12:16:15,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:16:15,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 351 [2023-08-26 12:16:15,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand