/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 --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -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/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:18:46,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:18:46,368 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 18:18:46,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:18:46,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:18:46,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:18:46,405 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:18:46,406 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:18:46,406 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:18:46,407 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:18:46,407 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:18:46,407 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:18:46,408 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:18:46,408 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:18:46,408 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:18:46,409 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:18:46,409 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:18:46,409 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:18:46,410 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:18:46,410 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:18:46,410 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:18:46,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:18:46,411 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:18:46,411 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:18:46,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:18:46,412 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:18:46,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:18:46,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:18:46,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:18:46,414 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:18:46,414 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:18:46,414 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:18:46,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:18:46,415 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:18:46,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:18:46,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:18:46,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:18:46,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:18:46,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:18:46,777 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:18:46,778 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:18:46,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2023-08-26 18:18:47,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:18:48,176 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:18:48,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2023-08-26 18:18:48,194 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea34869fc/57091ffde0c84f6a971a486825b1bc4a/FLAGf291d1952 [2023-08-26 18:18:48,208 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea34869fc/57091ffde0c84f6a971a486825b1bc4a [2023-08-26 18:18:48,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:18:48,211 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:18:48,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:18:48,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:18:48,215 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:18:48,216 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,216 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3da4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48, skipping insertion in model container [2023-08-26 18:18:48,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,255 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:18:48,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:18:48,636 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:18:48,665 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:18:48,666 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:18:48,724 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:18:48,763 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:18:48,763 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:18:48,769 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:18:48,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48 WrapperNode [2023-08-26 18:18:48,769 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:18:48,770 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:18:48,770 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:18:48,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:18:48,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,792 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,819 INFO L138 Inliner]: procedures = 177, calls = 68, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 165 [2023-08-26 18:18:48,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:18:48,820 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:18:48,820 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:18:48,820 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:18:48,828 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,828 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,841 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,842 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,854 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,858 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,859 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,866 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:18:48,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:18:48,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:18:48,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:18:48,873 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (1/1) ... [2023-08-26 18:18:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:18:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:18:48,902 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 18:18:48,913 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 18:18:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:18:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:18:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:18:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:18:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:18:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:18:48,942 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:18:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:18:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:18:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:18:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:18:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 18:18:48,943 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 18:18:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:18:48,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:18:48,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:18:48,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:18:48,946 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 18:18:49,093 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:18:49,095 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:18:49,478 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:18:49,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:18:49,583 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:18:49,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:18:49 BoogieIcfgContainer [2023-08-26 18:18:49,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:18:49,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:18:49,593 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:18:49,597 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:18:49,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:18:48" (1/3) ... [2023-08-26 18:18:49,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21913e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:18:49, skipping insertion in model container [2023-08-26 18:18:49,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:18:48" (2/3) ... [2023-08-26 18:18:49,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21913e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:18:49, skipping insertion in model container [2023-08-26 18:18:49,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:18:49" (3/3) ... [2023-08-26 18:18:49,600 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2023-08-26 18:18:49,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:18:49,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 18:18:49,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:18:49,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:18:49,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 137 transitions, 294 flow [2023-08-26 18:18:49,796 INFO L124 PetriNetUnfolderBase]: 3/133 cut-off events. [2023-08-26 18:18:49,796 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:18:49,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 133 events. 3/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 105 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2023-08-26 18:18:49,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 137 transitions, 294 flow [2023-08-26 18:18:49,807 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 133 transitions, 278 flow [2023-08-26 18:18:49,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:18:49,822 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 133 transitions, 278 flow [2023-08-26 18:18:49,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 133 transitions, 278 flow [2023-08-26 18:18:49,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 133 transitions, 278 flow [2023-08-26 18:18:49,915 INFO L124 PetriNetUnfolderBase]: 3/133 cut-off events. [2023-08-26 18:18:49,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:18:49,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 133 events. 3/133 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2023-08-26 18:18:49,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 3100 [2023-08-26 18:18:54,950 INFO L134 LiptonReduction]: Checked pairs total: 7909 [2023-08-26 18:18:54,950 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-08-26 18:18:54,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:18:54,965 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;@4513d006, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:18:54,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 18:18:54,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:18:54,966 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:18:54,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:18:54,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:18:54,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:18:54,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:18:54,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:18:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash 590, now seen corresponding path program 1 times [2023-08-26 18:18:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:18:54,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51607990] [2023-08-26 18:18:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:18:54,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:18:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:18:55,058 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 18:18:55,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:18:55,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51607990] [2023-08-26 18:18:55,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51607990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:18:55,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:18:55,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:18:55,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972707590] [2023-08-26 18:18:55,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:18:55,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:18:55,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:18:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:18:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:18:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 271 [2023-08-26 18:18:55,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:55,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:18:55,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 271 [2023-08-26 18:18:55,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:18:55,696 INFO L124 PetriNetUnfolderBase]: 2594/3661 cut-off events. [2023-08-26 18:18:55,696 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 18:18:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7356 conditions, 3661 events. 2594/3661 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18157 event pairs, 2594 based on Foata normal form. 0/3243 useless extension candidates. Maximal degree in co-relation 7344. Up to 3592 conditions per place. [2023-08-26 18:18:55,721 INFO L140 encePairwiseOnDemand]: 263/271 looper letters, 23 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-26 18:18:55,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 27 transitions, 112 flow [2023-08-26 18:18:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:18:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:18:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2023-08-26 18:18:55,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.511070110701107 [2023-08-26 18:18:55,734 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2023-08-26 18:18:55,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2023-08-26 18:18:55,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:18:55,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2023-08-26 18:18:55,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:55,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:55,745 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 271.0) internal successors, (813), 3 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:55,746 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 82 flow. Second operand 2 states and 277 transitions. [2023-08-26 18:18:55,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 27 transitions, 112 flow [2023-08-26 18:18:55,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:18:55,752 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 62 flow [2023-08-26 18:18:55,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=62, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-26 18:18:55,756 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -11 predicate places. [2023-08-26 18:18:55,756 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 62 flow [2023-08-26 18:18:55,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 123.5) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:55,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:18:55,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:18:55,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:18:55,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P3Err0ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:18:55,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:18:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash -904661598, now seen corresponding path program 1 times [2023-08-26 18:18:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:18:55,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750169698] [2023-08-26 18:18:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:18:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:18:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:18:56,151 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 18:18:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:18:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750169698] [2023-08-26 18:18:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750169698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:18:56,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:18:56,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:18:56,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911366251] [2023-08-26 18:18:56,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:18:56,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:18:56,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:18:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:18:56,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:18:56,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 271 [2023-08-26 18:18:56,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 27 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:56,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:18:56,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 271 [2023-08-26 18:18:56,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:18:56,539 INFO L124 PetriNetUnfolderBase]: 2075/3088 cut-off events. [2023-08-26 18:18:56,581 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:18:56,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6081 conditions, 3088 events. 2075/3088 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16312 event pairs, 518 based on Foata normal form. 0/2931 useless extension candidates. Maximal degree in co-relation 6078. Up to 2098 conditions per place. [2023-08-26 18:18:56,595 INFO L140 encePairwiseOnDemand]: 268/271 looper letters, 29 selfloop transitions, 2 changer transitions 2/37 dead transitions. [2023-08-26 18:18:56,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 148 flow [2023-08-26 18:18:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:18:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:18:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-26 18:18:56,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4920049200492005 [2023-08-26 18:18:56,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-26 18:18:56,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-26 18:18:56,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:18:56,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-26 18:18:56,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:56,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:56,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:56,604 INFO L175 Difference]: Start difference. First operand has 37 places, 27 transitions, 62 flow. Second operand 3 states and 400 transitions. [2023-08-26 18:18:56,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 148 flow [2023-08-26 18:18:56,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:18:56,605 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 62 flow [2023-08-26 18:18:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-26 18:18:56,606 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -10 predicate places. [2023-08-26 18:18:56,606 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 62 flow [2023-08-26 18:18:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:56,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:18:56,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:18:56,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:18:56,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:18:56,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:18:56,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1796333990, now seen corresponding path program 1 times [2023-08-26 18:18:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:18:56,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843347123] [2023-08-26 18:18:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:18:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:18:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:18:57,306 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 18:18:57,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:18:57,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843347123] [2023-08-26 18:18:57,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843347123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:18:57,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:18:57,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:18:57,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637562930] [2023-08-26 18:18:57,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:18:57,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:18:57,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:18:57,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:18:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:18:57,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-26 18:18:57,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:57,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:18:57,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-26 18:18:57,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:18:58,272 INFO L124 PetriNetUnfolderBase]: 7768/10753 cut-off events. [2023-08-26 18:18:58,273 INFO L125 PetriNetUnfolderBase]: For 514/514 co-relation queries the response was YES. [2023-08-26 18:18:58,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22337 conditions, 10753 events. 7768/10753 cut-off events. For 514/514 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 54644 event pairs, 610 based on Foata normal form. 350/11103 useless extension candidates. Maximal degree in co-relation 22333. Up to 6687 conditions per place. [2023-08-26 18:18:58,340 INFO L140 encePairwiseOnDemand]: 260/271 looper letters, 52 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-08-26 18:18:58,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 282 flow [2023-08-26 18:18:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:18:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:18:58,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2023-08-26 18:18:58,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45571955719557194 [2023-08-26 18:18:58,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2023-08-26 18:18:58,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2023-08-26 18:18:58,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:18:58,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2023-08-26 18:18:58,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 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 18:18:58,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:58,349 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:58,349 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 62 flow. Second operand 4 states and 494 transitions. [2023-08-26 18:18:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 282 flow [2023-08-26 18:18:58,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:18:58,353 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 150 flow [2023-08-26 18:18:58,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 18:18:58,354 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-26 18:18:58,354 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 150 flow [2023-08-26 18:18:58,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:58,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:18:58,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:18:58,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:18:58,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:18:58,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:18:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash 148219800, now seen corresponding path program 1 times [2023-08-26 18:18:58,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:18:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043631417] [2023-08-26 18:18:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:18:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:18:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:18:59,027 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 18:18:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:18:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043631417] [2023-08-26 18:18:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043631417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:18:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:18:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:18:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220716367] [2023-08-26 18:18:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:18:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:18:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:18:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:18:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:18:59,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-26 18:18:59,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:18:59,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:18:59,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-26 18:18:59,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:00,055 INFO L124 PetriNetUnfolderBase]: 7595/10520 cut-off events. [2023-08-26 18:19:00,056 INFO L125 PetriNetUnfolderBase]: For 6215/6215 co-relation queries the response was YES. [2023-08-26 18:19:00,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29788 conditions, 10520 events. 7595/10520 cut-off events. For 6215/6215 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 53810 event pairs, 487 based on Foata normal form. 30/10550 useless extension candidates. Maximal degree in co-relation 29782. Up to 6577 conditions per place. [2023-08-26 18:19:00,141 INFO L140 encePairwiseOnDemand]: 260/271 looper letters, 55 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2023-08-26 18:19:00,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 418 flow [2023-08-26 18:19:00,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2023-08-26 18:19:00,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45018450184501846 [2023-08-26 18:19:00,144 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2023-08-26 18:19:00,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2023-08-26 18:19:00,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:00,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2023-08-26 18:19:00,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:00,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:00,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:00,148 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 150 flow. Second operand 4 states and 488 transitions. [2023-08-26 18:19:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 418 flow [2023-08-26 18:19:00,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 70 transitions, 418 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:19:00,155 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 292 flow [2023-08-26 18:19:00,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=292, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2023-08-26 18:19:00,157 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-26 18:19:00,157 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 292 flow [2023-08-26 18:19:00,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:00,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:00,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:00,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:19:00,159 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:00,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:00,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1151205348, now seen corresponding path program 1 times [2023-08-26 18:19:00,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:00,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226280061] [2023-08-26 18:19:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:00,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:00,301 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 18:19:00,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:00,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226280061] [2023-08-26 18:19:00,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226280061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:00,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:00,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:19:00,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936238867] [2023-08-26 18:19:00,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:00,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:19:00,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:00,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:19:00,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:19:00,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 271 [2023-08-26 18:19:00,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:00,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:00,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 271 [2023-08-26 18:19:00,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:01,248 INFO L124 PetriNetUnfolderBase]: 6599/9522 cut-off events. [2023-08-26 18:19:01,248 INFO L125 PetriNetUnfolderBase]: For 16741/16991 co-relation queries the response was YES. [2023-08-26 18:19:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31223 conditions, 9522 events. 6599/9522 cut-off events. For 16741/16991 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 55036 event pairs, 2662 based on Foata normal form. 265/9484 useless extension candidates. Maximal degree in co-relation 31214. Up to 5015 conditions per place. [2023-08-26 18:19:01,307 INFO L140 encePairwiseOnDemand]: 268/271 looper letters, 50 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-08-26 18:19:01,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 484 flow [2023-08-26 18:19:01,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:01,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 18:19:01,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48954489544895446 [2023-08-26 18:19:01,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 18:19:01,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 18:19:01,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:01,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 18:19:01,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:01,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:01,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:01,312 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 292 flow. Second operand 3 states and 398 transitions. [2023-08-26 18:19:01,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 484 flow [2023-08-26 18:19:01,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 484 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:19:01,340 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 312 flow [2023-08-26 18:19:01,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2023-08-26 18:19:01,343 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-08-26 18:19:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 312 flow [2023-08-26 18:19:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:01,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:01,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:19:01,344 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:01,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -948136631, now seen corresponding path program 1 times [2023-08-26 18:19:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:01,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161673778] [2023-08-26 18:19:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:01,795 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 18:19:01,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:01,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161673778] [2023-08-26 18:19:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161673778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:01,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:01,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:19:01,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342105370] [2023-08-26 18:19:01,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:01,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:01,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:01,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:01,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-26 18:19:01,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:01,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:01,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-26 18:19:01,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:02,623 INFO L124 PetriNetUnfolderBase]: 7328/10875 cut-off events. [2023-08-26 18:19:02,624 INFO L125 PetriNetUnfolderBase]: For 22493/22935 co-relation queries the response was YES. [2023-08-26 18:19:02,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35887 conditions, 10875 events. 7328/10875 cut-off events. For 22493/22935 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 64860 event pairs, 1533 based on Foata normal form. 222/10977 useless extension candidates. Maximal degree in co-relation 35876. Up to 8971 conditions per place. [2023-08-26 18:19:02,691 INFO L140 encePairwiseOnDemand]: 267/271 looper letters, 50 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-08-26 18:19:02,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 67 transitions, 542 flow [2023-08-26 18:19:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:19:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:19:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-26 18:19:02,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47724477244772445 [2023-08-26 18:19:02,694 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-26 18:19:02,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-26 18:19:02,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:02,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-26 18:19:02,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:02,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:02,698 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:02,698 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 312 flow. Second operand 3 states and 388 transitions. [2023-08-26 18:19:02,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 67 transitions, 542 flow [2023-08-26 18:19:02,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 530 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:02,746 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 343 flow [2023-08-26 18:19:02,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-26 18:19:02,748 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 4 predicate places. [2023-08-26 18:19:02,748 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 343 flow [2023-08-26 18:19:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:02,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:02,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:02,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:19:02,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:02,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 672532169, now seen corresponding path program 1 times [2023-08-26 18:19:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521807622] [2023-08-26 18:19:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:02,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:02,973 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 18:19:02,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:02,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521807622] [2023-08-26 18:19:02,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521807622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:02,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:02,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:19:02,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889881735] [2023-08-26 18:19:02,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:02,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:02,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:02,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:02,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:02,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 271 [2023-08-26 18:19:02,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 343 flow. Second operand has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:02,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:02,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 271 [2023-08-26 18:19:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:03,898 INFO L124 PetriNetUnfolderBase]: 7385/10956 cut-off events. [2023-08-26 18:19:03,898 INFO L125 PetriNetUnfolderBase]: For 23705/24232 co-relation queries the response was YES. [2023-08-26 18:19:03,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37612 conditions, 10956 events. 7385/10956 cut-off events. For 23705/24232 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 65389 event pairs, 1146 based on Foata normal form. 288/11199 useless extension candidates. Maximal degree in co-relation 37600. Up to 7419 conditions per place. [2023-08-26 18:19:04,032 INFO L140 encePairwiseOnDemand]: 265/271 looper letters, 59 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2023-08-26 18:19:04,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 689 flow [2023-08-26 18:19:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-26 18:19:04,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797047970479705 [2023-08-26 18:19:04,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-26 18:19:04,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-26 18:19:04,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:04,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-26 18:19:04,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:04,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:04,038 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:04,038 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 343 flow. Second operand 4 states and 520 transitions. [2023-08-26 18:19:04,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 689 flow [2023-08-26 18:19:04,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 84 transitions, 684 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:04,070 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 427 flow [2023-08-26 18:19:04,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=427, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-26 18:19:04,071 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 7 predicate places. [2023-08-26 18:19:04,071 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 427 flow [2023-08-26 18:19:04,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:04,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:04,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:04,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:19:04,072 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:04,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 672418709, now seen corresponding path program 2 times [2023-08-26 18:19:04,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:04,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965363446] [2023-08-26 18:19:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:04,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:04,751 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 18:19:04,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:04,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965363446] [2023-08-26 18:19:04,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965363446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:04,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:04,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:04,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235333075] [2023-08-26 18:19:04,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:04,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:04,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:04,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:04,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:04,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-26 18:19:04,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 427 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:04,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:04,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-26 18:19:04,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:05,746 INFO L124 PetriNetUnfolderBase]: 9573/13434 cut-off events. [2023-08-26 18:19:05,746 INFO L125 PetriNetUnfolderBase]: For 33264/33264 co-relation queries the response was YES. [2023-08-26 18:19:05,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49781 conditions, 13434 events. 9573/13434 cut-off events. For 33264/33264 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 70526 event pairs, 1026 based on Foata normal form. 42/13476 useless extension candidates. Maximal degree in co-relation 49768. Up to 7405 conditions per place. [2023-08-26 18:19:05,828 INFO L140 encePairwiseOnDemand]: 259/271 looper letters, 77 selfloop transitions, 46 changer transitions 3/126 dead transitions. [2023-08-26 18:19:05,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 126 transitions, 1106 flow [2023-08-26 18:19:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 725 transitions. [2023-08-26 18:19:05,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44587945879458796 [2023-08-26 18:19:05,831 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 725 transitions. [2023-08-26 18:19:05,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 725 transitions. [2023-08-26 18:19:05,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:05,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 725 transitions. [2023-08-26 18:19:05,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.83333333333333) internal successors, (725), 6 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:05,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:05,836 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:05,836 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 427 flow. Second operand 6 states and 725 transitions. [2023-08-26 18:19:05,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 126 transitions, 1106 flow [2023-08-26 18:19:05,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 126 transitions, 1092 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:05,895 INFO L231 Difference]: Finished difference. Result has 63 places, 81 transitions, 854 flow [2023-08-26 18:19:05,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=854, PETRI_PLACES=63, PETRI_TRANSITIONS=81} [2023-08-26 18:19:05,897 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2023-08-26 18:19:05,897 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 81 transitions, 854 flow [2023-08-26 18:19:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:05,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:05,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:19:05,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:05,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:05,901 INFO L85 PathProgramCache]: Analyzing trace with hash 641536783, now seen corresponding path program 3 times [2023-08-26 18:19:05,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:05,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719057290] [2023-08-26 18:19:05,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:05,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:06,362 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 18:19:06,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:06,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719057290] [2023-08-26 18:19:06,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719057290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:06,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:06,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:06,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314835056] [2023-08-26 18:19:06,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:06,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:06,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:06,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2023-08-26 18:19:06,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 81 transitions, 854 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:06,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:06,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2023-08-26 18:19:06,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:07,258 INFO L124 PetriNetUnfolderBase]: 7355/10947 cut-off events. [2023-08-26 18:19:07,258 INFO L125 PetriNetUnfolderBase]: For 51973/52412 co-relation queries the response was YES. [2023-08-26 18:19:07,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46141 conditions, 10947 events. 7355/10947 cut-off events. For 51973/52412 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 64669 event pairs, 705 based on Foata normal form. 250/11001 useless extension candidates. Maximal degree in co-relation 46125. Up to 7373 conditions per place. [2023-08-26 18:19:07,329 INFO L140 encePairwiseOnDemand]: 267/271 looper letters, 70 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2023-08-26 18:19:07,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 104 transitions, 1144 flow [2023-08-26 18:19:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:07,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 506 transitions. [2023-08-26 18:19:07,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466789667896679 [2023-08-26 18:19:07,332 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 506 transitions. [2023-08-26 18:19:07,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 506 transitions. [2023-08-26 18:19:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:07,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 506 transitions. [2023-08-26 18:19:07,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 126.5) internal successors, (506), 4 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:07,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:07,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:07,335 INFO L175 Difference]: Start difference. First operand has 63 places, 81 transitions, 854 flow. Second operand 4 states and 506 transitions. [2023-08-26 18:19:07,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 104 transitions, 1144 flow [2023-08-26 18:19:07,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 1118 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:07,545 INFO L231 Difference]: Finished difference. Result has 65 places, 81 transitions, 861 flow [2023-08-26 18:19:07,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=861, PETRI_PLACES=65, PETRI_TRANSITIONS=81} [2023-08-26 18:19:07,546 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 17 predicate places. [2023-08-26 18:19:07,546 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 81 transitions, 861 flow [2023-08-26 18:19:07,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:07,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:07,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:07,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:19:07,547 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:07,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1913604672, now seen corresponding path program 1 times [2023-08-26 18:19:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:07,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901430673] [2023-08-26 18:19:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:07,896 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 18:19:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901430673] [2023-08-26 18:19:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901430673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:07,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:07,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:07,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870258703] [2023-08-26 18:19:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:07,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:07,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 271 [2023-08-26 18:19:07,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 81 transitions, 861 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:07,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:07,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 271 [2023-08-26 18:19:07,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:09,001 INFO L124 PetriNetUnfolderBase]: 7212/10728 cut-off events. [2023-08-26 18:19:09,001 INFO L125 PetriNetUnfolderBase]: For 51044/51483 co-relation queries the response was YES. [2023-08-26 18:19:09,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45694 conditions, 10728 events. 7212/10728 cut-off events. For 51044/51483 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 63198 event pairs, 1073 based on Foata normal form. 266/10770 useless extension candidates. Maximal degree in co-relation 45676. Up to 7997 conditions per place. [2023-08-26 18:19:09,078 INFO L140 encePairwiseOnDemand]: 266/271 looper letters, 80 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2023-08-26 18:19:09,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 1283 flow [2023-08-26 18:19:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:09,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 511 transitions. [2023-08-26 18:19:09,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714022140221402 [2023-08-26 18:19:09,082 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 511 transitions. [2023-08-26 18:19:09,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 511 transitions. [2023-08-26 18:19:09,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:09,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 511 transitions. [2023-08-26 18:19:09,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:09,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:09,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:09,086 INFO L175 Difference]: Start difference. First operand has 65 places, 81 transitions, 861 flow. Second operand 4 states and 511 transitions. [2023-08-26 18:19:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 1283 flow [2023-08-26 18:19:09,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 1260 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:09,316 INFO L231 Difference]: Finished difference. Result has 67 places, 84 transitions, 898 flow [2023-08-26 18:19:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=898, PETRI_PLACES=67, PETRI_TRANSITIONS=84} [2023-08-26 18:19:09,317 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2023-08-26 18:19:09,317 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 84 transitions, 898 flow [2023-08-26 18:19:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:09,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:09,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:09,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:19:09,317 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:09,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash 807761420, now seen corresponding path program 1 times [2023-08-26 18:19:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726153058] [2023-08-26 18:19:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:09,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:09,616 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 18:19:09,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:09,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726153058] [2023-08-26 18:19:09,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726153058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:09,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:09,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:09,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402555554] [2023-08-26 18:19:09,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:09,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:09,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:09,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-26 18:19:09,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 84 transitions, 898 flow. Second operand has 6 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:09,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:09,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-26 18:19:09,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:10,640 INFO L124 PetriNetUnfolderBase]: 7760/11436 cut-off events. [2023-08-26 18:19:10,640 INFO L125 PetriNetUnfolderBase]: For 58087/58768 co-relation queries the response was YES. [2023-08-26 18:19:10,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50091 conditions, 11436 events. 7760/11436 cut-off events. For 58087/58768 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 67448 event pairs, 1222 based on Foata normal form. 321/11502 useless extension candidates. Maximal degree in co-relation 50072. Up to 7557 conditions per place. [2023-08-26 18:19:10,695 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 71 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2023-08-26 18:19:10,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 1256 flow [2023-08-26 18:19:10,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 641 transitions. [2023-08-26 18:19:10,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47306273062730625 [2023-08-26 18:19:10,698 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 641 transitions. [2023-08-26 18:19:10,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 641 transitions. [2023-08-26 18:19:10,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:10,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 641 transitions. [2023-08-26 18:19:10,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:10,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:10,702 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:10,702 INFO L175 Difference]: Start difference. First operand has 67 places, 84 transitions, 898 flow. Second operand 5 states and 641 transitions. [2023-08-26 18:19:10,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 1256 flow [2023-08-26 18:19:10,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 115 transitions, 1240 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:10,878 INFO L231 Difference]: Finished difference. Result has 70 places, 90 transitions, 1010 flow [2023-08-26 18:19:10,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1010, PETRI_PLACES=70, PETRI_TRANSITIONS=90} [2023-08-26 18:19:10,878 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 22 predicate places. [2023-08-26 18:19:10,878 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 90 transitions, 1010 flow [2023-08-26 18:19:10,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:10,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:10,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:10,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:19:10,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:10,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1516708712, now seen corresponding path program 2 times [2023-08-26 18:19:10,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:10,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530506376] [2023-08-26 18:19:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:10,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:11,275 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 18:19:11,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:11,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530506376] [2023-08-26 18:19:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530506376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:11,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086844863] [2023-08-26 18:19:11,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:11,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:11,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:11,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:11,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:11,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-08-26 18:19:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 90 transitions, 1010 flow. Second operand has 6 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-08-26 18:19:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:12,408 INFO L124 PetriNetUnfolderBase]: 7559/11143 cut-off events. [2023-08-26 18:19:12,408 INFO L125 PetriNetUnfolderBase]: For 64968/65529 co-relation queries the response was YES. [2023-08-26 18:19:12,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52003 conditions, 11143 events. 7559/11143 cut-off events. For 64968/65529 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 65438 event pairs, 661 based on Foata normal form. 274/11115 useless extension candidates. Maximal degree in co-relation 51983. Up to 5955 conditions per place. [2023-08-26 18:19:12,481 INFO L140 encePairwiseOnDemand]: 265/271 looper letters, 92 selfloop transitions, 30 changer transitions 0/144 dead transitions. [2023-08-26 18:19:12,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 144 transitions, 1656 flow [2023-08-26 18:19:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 769 transitions. [2023-08-26 18:19:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47293972939729395 [2023-08-26 18:19:12,484 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 769 transitions. [2023-08-26 18:19:12,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 769 transitions. [2023-08-26 18:19:12,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:12,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 769 transitions. [2023-08-26 18:19:12,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.16666666666666) internal successors, (769), 6 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:12,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:12,489 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:12,489 INFO L175 Difference]: Start difference. First operand has 70 places, 90 transitions, 1010 flow. Second operand 6 states and 769 transitions. [2023-08-26 18:19:12,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 144 transitions, 1656 flow [2023-08-26 18:19:12,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 1606 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:12,722 INFO L231 Difference]: Finished difference. Result has 73 places, 98 transitions, 1150 flow [2023-08-26 18:19:12,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1150, PETRI_PLACES=73, PETRI_TRANSITIONS=98} [2023-08-26 18:19:12,723 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 25 predicate places. [2023-08-26 18:19:12,723 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 98 transitions, 1150 flow [2023-08-26 18:19:12,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:12,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:12,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:12,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:19:12,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:12,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -729234687, now seen corresponding path program 1 times [2023-08-26 18:19:12,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:12,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99480617] [2023-08-26 18:19:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:13,285 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 18:19:13,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:13,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99480617] [2023-08-26 18:19:13,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99480617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:13,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:13,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:13,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629056767] [2023-08-26 18:19:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:13,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:13,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:13,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 271 [2023-08-26 18:19:13,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 98 transitions, 1150 flow. Second operand has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:13,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:13,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 271 [2023-08-26 18:19:13,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:14,497 INFO L124 PetriNetUnfolderBase]: 8642/12754 cut-off events. [2023-08-26 18:19:14,497 INFO L125 PetriNetUnfolderBase]: For 84408/85074 co-relation queries the response was YES. [2023-08-26 18:19:14,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61315 conditions, 12754 events. 8642/12754 cut-off events. For 84408/85074 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 77206 event pairs, 763 based on Foata normal form. 349/12817 useless extension candidates. Maximal degree in co-relation 61294. Up to 7785 conditions per place. [2023-08-26 18:19:14,590 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 85 selfloop transitions, 29 changer transitions 0/136 dead transitions. [2023-08-26 18:19:14,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 136 transitions, 1656 flow [2023-08-26 18:19:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:14,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:14,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 626 transitions. [2023-08-26 18:19:14,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619926199261993 [2023-08-26 18:19:14,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 626 transitions. [2023-08-26 18:19:14,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 626 transitions. [2023-08-26 18:19:14,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:14,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 626 transitions. [2023-08-26 18:19:14,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.2) internal successors, (626), 5 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:14,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:14,597 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:14,597 INFO L175 Difference]: Start difference. First operand has 73 places, 98 transitions, 1150 flow. Second operand 5 states and 626 transitions. [2023-08-26 18:19:14,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 136 transitions, 1656 flow [2023-08-26 18:19:14,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 136 transitions, 1635 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 18:19:14,929 INFO L231 Difference]: Finished difference. Result has 76 places, 106 transitions, 1343 flow [2023-08-26 18:19:14,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1129, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1343, PETRI_PLACES=76, PETRI_TRANSITIONS=106} [2023-08-26 18:19:14,930 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 28 predicate places. [2023-08-26 18:19:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 106 transitions, 1343 flow [2023-08-26 18:19:14,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.28571428571429) internal successors, (821), 7 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:14,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:14,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:14,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:19:14,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:14,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:14,931 INFO L85 PathProgramCache]: Analyzing trace with hash -841839087, now seen corresponding path program 2 times [2023-08-26 18:19:14,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:14,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490311422] [2023-08-26 18:19:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:14,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:15,522 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 18:19:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:15,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490311422] [2023-08-26 18:19:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490311422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:15,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654543536] [2023-08-26 18:19:15,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:15,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:15,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:15,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 271 [2023-08-26 18:19:15,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 106 transitions, 1343 flow. Second operand has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:15,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:15,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 271 [2023-08-26 18:19:15,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:16,835 INFO L124 PetriNetUnfolderBase]: 9375/13951 cut-off events. [2023-08-26 18:19:16,835 INFO L125 PetriNetUnfolderBase]: For 107826/108550 co-relation queries the response was YES. [2023-08-26 18:19:16,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71977 conditions, 13951 events. 9375/13951 cut-off events. For 107826/108550 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 87609 event pairs, 952 based on Foata normal form. 353/13981 useless extension candidates. Maximal degree in co-relation 71954. Up to 8206 conditions per place. [2023-08-26 18:19:16,941 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 92 selfloop transitions, 34 changer transitions 0/148 dead transitions. [2023-08-26 18:19:16,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 148 transitions, 1951 flow [2023-08-26 18:19:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:16,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:16,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 638 transitions. [2023-08-26 18:19:16,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708487084870849 [2023-08-26 18:19:16,943 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 638 transitions. [2023-08-26 18:19:16,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 638 transitions. [2023-08-26 18:19:16,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:16,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 638 transitions. [2023-08-26 18:19:16,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:16,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:16,948 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:16,948 INFO L175 Difference]: Start difference. First operand has 76 places, 106 transitions, 1343 flow. Second operand 5 states and 638 transitions. [2023-08-26 18:19:16,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 148 transitions, 1951 flow [2023-08-26 18:19:17,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 148 transitions, 1894 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:17,518 INFO L231 Difference]: Finished difference. Result has 79 places, 119 transitions, 1616 flow [2023-08-26 18:19:17,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1616, PETRI_PLACES=79, PETRI_TRANSITIONS=119} [2023-08-26 18:19:17,519 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 31 predicate places. [2023-08-26 18:19:17,519 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 119 transitions, 1616 flow [2023-08-26 18:19:17,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.28571428571429) internal successors, (835), 7 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:17,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:17,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:19:17,519 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:17,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 226666873, now seen corresponding path program 3 times [2023-08-26 18:19:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320217481] [2023-08-26 18:19:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:18,033 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 18:19:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320217481] [2023-08-26 18:19:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320217481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484988305] [2023-08-26 18:19:18,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:18,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:18,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 271 [2023-08-26 18:19:18,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 119 transitions, 1616 flow. Second operand has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:18,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:18,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 271 [2023-08-26 18:19:18,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:19,452 INFO L124 PetriNetUnfolderBase]: 9153/13609 cut-off events. [2023-08-26 18:19:19,453 INFO L125 PetriNetUnfolderBase]: For 117307/118007 co-relation queries the response was YES. [2023-08-26 18:19:19,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72431 conditions, 13609 events. 9153/13609 cut-off events. For 117307/118007 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 84958 event pairs, 882 based on Foata normal form. 329/13595 useless extension candidates. Maximal degree in co-relation 72406. Up to 5802 conditions per place. [2023-08-26 18:19:19,520 INFO L140 encePairwiseOnDemand]: 265/271 looper letters, 93 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2023-08-26 18:19:19,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 156 transitions, 2132 flow [2023-08-26 18:19:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-26 18:19:19,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46789667896678966 [2023-08-26 18:19:19,523 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-26 18:19:19,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-26 18:19:19,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:19,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-26 18:19:19,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:19,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:19,527 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:19,527 INFO L175 Difference]: Start difference. First operand has 79 places, 119 transitions, 1616 flow. Second operand 5 states and 634 transitions. [2023-08-26 18:19:19,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 156 transitions, 2132 flow [2023-08-26 18:19:19,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 156 transitions, 2093 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:19,905 INFO L231 Difference]: Finished difference. Result has 83 places, 119 transitions, 1695 flow [2023-08-26 18:19:19,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1695, PETRI_PLACES=83, PETRI_TRANSITIONS=119} [2023-08-26 18:19:19,906 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 35 predicate places. [2023-08-26 18:19:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 119 transitions, 1695 flow [2023-08-26 18:19:19,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.28571428571429) internal successors, (828), 7 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:19,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:19,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:19,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:19:19,907 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:19,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash -728186081, now seen corresponding path program 1 times [2023-08-26 18:19:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:19,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745558831] [2023-08-26 18:19:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:20,050 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 18:19:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745558831] [2023-08-26 18:19:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745558831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:20,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:20,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815371620] [2023-08-26 18:19:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:20,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:20,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 271 [2023-08-26 18:19:20,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 119 transitions, 1695 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:20,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:20,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 271 [2023-08-26 18:19:20,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:21,453 INFO L124 PetriNetUnfolderBase]: 7294/11075 cut-off events. [2023-08-26 18:19:21,453 INFO L125 PetriNetUnfolderBase]: For 158908/161556 co-relation queries the response was YES. [2023-08-26 18:19:21,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61353 conditions, 11075 events. 7294/11075 cut-off events. For 158908/161556 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 74111 event pairs, 1081 based on Foata normal form. 2241/12982 useless extension candidates. Maximal degree in co-relation 61327. Up to 7151 conditions per place. [2023-08-26 18:19:21,507 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 233 selfloop transitions, 10 changer transitions 2/271 dead transitions. [2023-08-26 18:19:21,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 271 transitions, 4425 flow [2023-08-26 18:19:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:19:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:19:21,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 18:19:21,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46863468634686345 [2023-08-26 18:19:21,510 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 18:19:21,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 18:19:21,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:21,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 18:19:21,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,514 INFO L175 Difference]: Start difference. First operand has 83 places, 119 transitions, 1695 flow. Second operand 5 states and 635 transitions. [2023-08-26 18:19:21,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 271 transitions, 4425 flow [2023-08-26 18:19:21,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 271 transitions, 4223 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 18:19:21,694 INFO L231 Difference]: Finished difference. Result has 86 places, 128 transitions, 1734 flow [2023-08-26 18:19:21,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1734, PETRI_PLACES=86, PETRI_TRANSITIONS=128} [2023-08-26 18:19:21,695 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 38 predicate places. [2023-08-26 18:19:21,695 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 128 transitions, 1734 flow [2023-08-26 18:19:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:21,695 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 18:19:21,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:19:21,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:21,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1005386773, now seen corresponding path program 1 times [2023-08-26 18:19:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768341889] [2023-08-26 18:19:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:21,840 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 18:19:21,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:21,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768341889] [2023-08-26 18:19:21,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768341889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:21,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:21,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:21,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533154463] [2023-08-26 18:19:21,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:21,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:21,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:21,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:21,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 271 [2023-08-26 18:19:21,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 128 transitions, 1734 flow. Second operand has 5 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:21,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:21,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 271 [2023-08-26 18:19:21,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:23,014 INFO L124 PetriNetUnfolderBase]: 5789/9014 cut-off events. [2023-08-26 18:19:23,014 INFO L125 PetriNetUnfolderBase]: For 133977/137312 co-relation queries the response was YES. [2023-08-26 18:19:23,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54687 conditions, 9014 events. 5789/9014 cut-off events. For 133977/137312 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 61189 event pairs, 312 based on Foata normal form. 2312/11060 useless extension candidates. Maximal degree in co-relation 54658. Up to 3684 conditions per place. [2023-08-26 18:19:23,078 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 293 selfloop transitions, 19 changer transitions 11/348 dead transitions. [2023-08-26 18:19:23,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 348 transitions, 5558 flow [2023-08-26 18:19:23,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 890 transitions. [2023-08-26 18:19:23,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691618344754876 [2023-08-26 18:19:23,081 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 890 transitions. [2023-08-26 18:19:23,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 890 transitions. [2023-08-26 18:19:23,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:23,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 890 transitions. [2023-08-26 18:19:23,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.14285714285714) internal successors, (890), 7 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,086 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,086 INFO L175 Difference]: Start difference. First operand has 86 places, 128 transitions, 1734 flow. Second operand 7 states and 890 transitions. [2023-08-26 18:19:23,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 348 transitions, 5558 flow [2023-08-26 18:19:23,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 348 transitions, 5553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:19:23,243 INFO L231 Difference]: Finished difference. Result has 94 places, 128 transitions, 1737 flow [2023-08-26 18:19:23,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1737, PETRI_PLACES=94, PETRI_TRANSITIONS=128} [2023-08-26 18:19:23,244 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 46 predicate places. [2023-08-26 18:19:23,244 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 128 transitions, 1737 flow [2023-08-26 18:19:23,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:23,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:23,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:19:23,245 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:23,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:23,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2069687286, now seen corresponding path program 1 times [2023-08-26 18:19:23,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:23,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691777459] [2023-08-26 18:19:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:23,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:23,715 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 18:19:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691777459] [2023-08-26 18:19:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691777459] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:23,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:23,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:19:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259050253] [2023-08-26 18:19:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:19:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:19:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:19:23,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 271 [2023-08-26 18:19:23,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 128 transitions, 1737 flow. Second operand has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:23,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:23,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 271 [2023-08-26 18:19:23,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:25,316 INFO L124 PetriNetUnfolderBase]: 11409/17232 cut-off events. [2023-08-26 18:19:25,316 INFO L125 PetriNetUnfolderBase]: For 178013/178013 co-relation queries the response was YES. [2023-08-26 18:19:25,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109536 conditions, 17232 events. 11409/17232 cut-off events. For 178013/178013 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 111495 event pairs, 1958 based on Foata normal form. 31/17263 useless extension candidates. Maximal degree in co-relation 109504. Up to 7885 conditions per place. [2023-08-26 18:19:25,448 INFO L140 encePairwiseOnDemand]: 260/271 looper letters, 141 selfloop transitions, 29 changer transitions 83/253 dead transitions. [2023-08-26 18:19:25,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 253 transitions, 3782 flow [2023-08-26 18:19:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:19:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:19:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-08-26 18:19:25,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4547970479704797 [2023-08-26 18:19:25,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-08-26 18:19:25,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-08-26 18:19:25,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:25,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-08-26 18:19:25,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,454 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:25,455 INFO L175 Difference]: Start difference. First operand has 94 places, 128 transitions, 1737 flow. Second operand 4 states and 493 transitions. [2023-08-26 18:19:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 253 transitions, 3782 flow [2023-08-26 18:19:26,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 253 transitions, 3636 flow, removed 51 selfloop flow, removed 3 redundant places. [2023-08-26 18:19:26,652 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1662 flow [2023-08-26 18:19:26,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1687, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1662, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2023-08-26 18:19:26,653 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 48 predicate places. [2023-08-26 18:19:26,653 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1662 flow [2023-08-26 18:19:26,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:26,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:26,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:19:26,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:26,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -683040122, now seen corresponding path program 1 times [2023-08-26 18:19:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890666394] [2023-08-26 18:19:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:26,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:26,814 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 18:19:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890666394] [2023-08-26 18:19:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890666394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:26,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:19:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981634503] [2023-08-26 18:19:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:26,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:19:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:19:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:19:26,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 271 [2023-08-26 18:19:26,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1662 flow. Second operand has 6 states, 6 states have (on average 117.83333333333333) internal successors, (707), 6 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:26,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:26,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 271 [2023-08-26 18:19:26,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:27,464 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2023-08-26 18:19:27,464 INFO L125 PetriNetUnfolderBase]: For 68333/69316 co-relation queries the response was YES. [2023-08-26 18:19:27,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25138 conditions, 4126 events. 2416/4126 cut-off events. For 68333/69316 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27253 event pairs, 165 based on Foata normal form. 898/4906 useless extension candidates. Maximal degree in co-relation 25104. Up to 1502 conditions per place. [2023-08-26 18:19:27,488 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 181 selfloop transitions, 18 changer transitions 55/272 dead transitions. [2023-08-26 18:19:27,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 272 transitions, 4620 flow [2023-08-26 18:19:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:19:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:19:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 891 transitions. [2023-08-26 18:19:27,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46968898260411174 [2023-08-26 18:19:27,491 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 891 transitions. [2023-08-26 18:19:27,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 891 transitions. [2023-08-26 18:19:27,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:27,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 891 transitions. [2023-08-26 18:19:27,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.28571428571429) internal successors, (891), 7 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,496 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,497 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1662 flow. Second operand 7 states and 891 transitions. [2023-08-26 18:19:27,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 272 transitions, 4620 flow [2023-08-26 18:19:27,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 272 transitions, 4420 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-08-26 18:19:27,576 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 1433 flow [2023-08-26 18:19:27,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1433, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2023-08-26 18:19:27,576 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 47 predicate places. [2023-08-26 18:19:27,576 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 1433 flow [2023-08-26 18:19:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.83333333333333) internal successors, (707), 6 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:27,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:27,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:19:27,577 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:27,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2025877785, now seen corresponding path program 1 times [2023-08-26 18:19:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415651145] [2023-08-26 18:19:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:28,082 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 18:19:28,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:28,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415651145] [2023-08-26 18:19:28,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415651145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:28,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:28,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:19:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806094148] [2023-08-26 18:19:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:19:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:28,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:19:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:19:28,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 271 [2023-08-26 18:19:28,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 1433 flow. Second operand has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:28,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:28,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 271 [2023-08-26 18:19:28,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:29,239 INFO L124 PetriNetUnfolderBase]: 4836/8015 cut-off events. [2023-08-26 18:19:29,239 INFO L125 PetriNetUnfolderBase]: For 78760/78760 co-relation queries the response was YES. [2023-08-26 18:19:29,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50523 conditions, 8015 events. 4836/8015 cut-off events. For 78760/78760 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 53170 event pairs, 292 based on Foata normal form. 9/8024 useless extension candidates. Maximal degree in co-relation 50490. Up to 3244 conditions per place. [2023-08-26 18:19:29,280 INFO L140 encePairwiseOnDemand]: 259/271 looper letters, 96 selfloop transitions, 34 changer transitions 136/266 dead transitions. [2023-08-26 18:19:29,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 266 transitions, 3811 flow [2023-08-26 18:19:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:19:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:19:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 723 transitions. [2023-08-26 18:19:29,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4446494464944649 [2023-08-26 18:19:29,282 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 723 transitions. [2023-08-26 18:19:29,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 723 transitions. [2023-08-26 18:19:29,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:29,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 723 transitions. [2023-08-26 18:19:29,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.5) internal successors, (723), 6 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,287 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,287 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 1433 flow. Second operand 6 states and 723 transitions. [2023-08-26 18:19:29,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 266 transitions, 3811 flow [2023-08-26 18:19:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 266 transitions, 3436 flow, removed 119 selfloop flow, removed 4 redundant places. [2023-08-26 18:19:29,677 INFO L231 Difference]: Finished difference. Result has 98 places, 80 transitions, 1098 flow [2023-08-26 18:19:29,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1098, PETRI_PLACES=98, PETRI_TRANSITIONS=80} [2023-08-26 18:19:29,678 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 50 predicate places. [2023-08-26 18:19:29,678 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 80 transitions, 1098 flow [2023-08-26 18:19:29,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:29,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:19:29,679 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:29,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -660892813, now seen corresponding path program 2 times [2023-08-26 18:19:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046735940] [2023-08-26 18:19:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:19:29,869 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 18:19:29,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:19:29,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046735940] [2023-08-26 18:19:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046735940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:19:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:19:29,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:19:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78345200] [2023-08-26 18:19:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:19:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:19:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:19:29,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:19:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:19:29,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 271 [2023-08-26 18:19:29,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 80 transitions, 1098 flow. Second operand has 7 states, 7 states have (on average 117.71428571428571) internal successors, (824), 7 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:29,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:19:29,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 271 [2023-08-26 18:19:29,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:19:30,226 INFO L124 PetriNetUnfolderBase]: 1118/2046 cut-off events. [2023-08-26 18:19:30,227 INFO L125 PetriNetUnfolderBase]: For 22154/22374 co-relation queries the response was YES. [2023-08-26 18:19:30,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11776 conditions, 2046 events. 1118/2046 cut-off events. For 22154/22374 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 12744 event pairs, 92 based on Foata normal form. 184/2188 useless extension candidates. Maximal degree in co-relation 11741. Up to 665 conditions per place. [2023-08-26 18:19:30,237 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 51 selfloop transitions, 18 changer transitions 100/174 dead transitions. [2023-08-26 18:19:30,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 174 transitions, 2874 flow [2023-08-26 18:19:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:19:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:19:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 988 transitions. [2023-08-26 18:19:30,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45571955719557194 [2023-08-26 18:19:30,240 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 988 transitions. [2023-08-26 18:19:30,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 988 transitions. [2023-08-26 18:19:30,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:19:30,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 988 transitions. [2023-08-26 18:19:30,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,245 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,246 INFO L175 Difference]: Start difference. First operand has 98 places, 80 transitions, 1098 flow. Second operand 8 states and 988 transitions. [2023-08-26 18:19:30,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 174 transitions, 2874 flow [2023-08-26 18:19:30,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 2487 flow, removed 55 selfloop flow, removed 13 redundant places. [2023-08-26 18:19:30,299 INFO L231 Difference]: Finished difference. Result has 92 places, 46 transitions, 440 flow [2023-08-26 18:19:30,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=440, PETRI_PLACES=92, PETRI_TRANSITIONS=46} [2023-08-26 18:19:30,300 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 44 predicate places. [2023-08-26 18:19:30,300 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 46 transitions, 440 flow [2023-08-26 18:19:30,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.71428571428571) internal successors, (824), 7 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:19:30,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:19:30,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:30,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 18:19:30,301 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [P3Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:19:30,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:19:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1016173778, now seen corresponding path program 1 times [2023-08-26 18:19:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:19:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731579267] [2023-08-26 18:19:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:19:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:19:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:19:30,339 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:19:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:19:30,392 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:19:30,392 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:19:30,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (14 of 15 remaining) [2023-08-26 18:19:30,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P3Err0ASSERT_VIOLATIONASSERT (13 of 15 remaining) [2023-08-26 18:19:30,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 18:19:30,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2023-08-26 18:19:30,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 15 remaining) [2023-08-26 18:19:30,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 15 remaining) [2023-08-26 18:19:30,396 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P3Err0ASSERT_VIOLATIONASSERT (0 of 15 remaining) [2023-08-26 18:19:30,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 18:19:30,396 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:19:30,401 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:19:30,401 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:19:30,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:19:30 BasicIcfg [2023-08-26 18:19:30,471 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:19:30,472 INFO L158 Benchmark]: Toolchain (without parser) took 42260.55ms. Allocated memory was 335.5MB in the beginning and 3.6GB in the end (delta: 3.3GB). Free memory was 310.3MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 820.2MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,472 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 335.5MB. Free memory was 312.6MB in the beginning and 312.4MB in the end (delta: 125.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:19:30,472 INFO L158 Benchmark]: CACSL2BoogieTranslator took 557.33ms. Allocated memory is still 335.5MB. Free memory was 310.3MB in the beginning and 286.9MB in the end (delta: 23.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,472 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.29ms. Allocated memory is still 335.5MB. Free memory was 286.9MB in the beginning and 284.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,473 INFO L158 Benchmark]: Boogie Preprocessor took 46.48ms. Allocated memory is still 335.5MB. Free memory was 284.2MB in the beginning and 282.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,473 INFO L158 Benchmark]: RCFGBuilder took 715.74ms. Allocated memory is still 335.5MB. Free memory was 282.1MB in the beginning and 245.6MB in the end (delta: 36.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,473 INFO L158 Benchmark]: TraceAbstraction took 40878.51ms. Allocated memory was 335.5MB in the beginning and 3.6GB in the end (delta: 3.3GB). Free memory was 245.0MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 755.2MB. Max. memory is 16.0GB. [2023-08-26 18:19:30,474 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 335.5MB. Free memory was 312.6MB in the beginning and 312.4MB in the end (delta: 125.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 557.33ms. Allocated memory is still 335.5MB. Free memory was 310.3MB in the beginning and 286.9MB in the end (delta: 23.3MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.29ms. Allocated memory is still 335.5MB. Free memory was 286.9MB in the beginning and 284.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.48ms. Allocated memory is still 335.5MB. Free memory was 284.2MB in the beginning and 282.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 715.74ms. Allocated memory is still 335.5MB. Free memory was 282.1MB in the beginning and 245.6MB in the end (delta: 36.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * TraceAbstraction took 40878.51ms. Allocated memory was 335.5MB in the beginning and 3.6GB in the end (delta: 3.3GB). Free memory was 245.0MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 755.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 143 PlacesBefore, 48 PlacesAfterwards, 133 TransitionsBefore, 35 TransitionsAfterwards, 3100 CoEnabledTransitionPairs, 7 FixpointIterations, 48 TrivialSequentialCompositions, 67 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 3 ChoiceCompositions, 134 TotalNumberOfCompositions, 7909 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3868, independent: 3666, independent conditional: 0, independent unconditional: 3666, dependent: 202, dependent conditional: 0, dependent unconditional: 202, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1738, independent: 1690, independent conditional: 0, independent unconditional: 1690, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3868, independent: 1976, independent conditional: 0, independent unconditional: 1976, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 1738, unknown conditional: 0, unknown unconditional: 1738] , Statistics on independence cache: Total cache size (in pairs): 162, Positive cache size: 143, Positive conditional cache size: 0, Positive unconditional cache size: 143, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L710] 0 int __unbuffered_cnt = 0; [L712] 0 int __unbuffered_p3_EAX = 0; [L714] 0 int a = 0; [L715] 0 _Bool main$tmp_guard0; [L716] 0 _Bool main$tmp_guard1; [L718] 0 int x = 0; [L720] 0 int y = 0; [L722] 0 int z = 0; [L723] 0 _Bool z$flush_delayed; [L724] 0 int z$mem_tmp; [L725] 0 _Bool z$r_buff0_thd0; [L726] 0 _Bool z$r_buff0_thd1; [L727] 0 _Bool z$r_buff0_thd2; [L728] 0 _Bool z$r_buff0_thd3; [L729] 0 _Bool z$r_buff0_thd4; [L730] 0 _Bool z$r_buff1_thd0; [L731] 0 _Bool z$r_buff1_thd1; [L732] 0 _Bool z$r_buff1_thd2; [L733] 0 _Bool z$r_buff1_thd3; [L734] 0 _Bool z$r_buff1_thd4; [L735] 0 _Bool z$read_delayed; [L736] 0 int *z$read_delayed_var; [L737] 0 int z$w_buff0; [L738] 0 _Bool z$w_buff0_used; [L739] 0 int z$w_buff1; [L740] 0 _Bool z$w_buff1_used; [L741] 0 _Bool weak$$choice0; [L742] 0 _Bool weak$$choice2; [L834] 0 pthread_t t1517; [L835] FCALL, FORK 0 pthread_create(&t1517, ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1517, ((void *)0), P0, ((void *)0))=-3, t1517={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L836] 0 pthread_t t1518; [L837] FCALL, FORK 0 pthread_create(&t1518, ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1518, ((void *)0), P1, ((void *)0))=-2, t1517={5:0}, t1518={6:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L838] 0 pthread_t t1519; [L839] FCALL, FORK 0 pthread_create(&t1519, ((void *)0), P2, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1519, ((void *)0), P2, ((void *)0))=-1, t1517={5:0}, t1518={6:0}, t1519={7:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L840] 0 pthread_t t1520; [L841] FCALL, FORK 0 pthread_create(&t1520, ((void *)0), P3, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1520, ((void *)0), P3, ((void *)0))=0, t1517={5:0}, t1518={6:0}, t1519={7:0}, t1520={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L796] 4 z$w_buff1 = z$w_buff0 [L797] 4 z$w_buff0 = 2 [L798] 4 z$w_buff1_used = z$w_buff0_used [L799] 4 z$w_buff0_used = (_Bool)1 [L800] CALL 4 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND FALSE 4 !(!expression) [L800] RET 4 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L801] 4 z$r_buff1_thd0 = z$r_buff0_thd0 [L802] 4 z$r_buff1_thd1 = z$r_buff0_thd1 [L803] 4 z$r_buff1_thd2 = z$r_buff0_thd2 [L804] 4 z$r_buff1_thd3 = z$r_buff0_thd3 [L805] 4 z$r_buff1_thd4 = z$r_buff0_thd4 [L806] 4 z$r_buff0_thd4 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L809] 4 __unbuffered_p3_EAX = a VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L746] 1 a = 1 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L749] 1 x = 1 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=1, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L761] 2 x = 2 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L764] 2 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=1, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L776] 3 y = 2 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=2, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L779] 3 z = 1 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=2, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=1] [L782] 3 z = z$w_buff0_used && z$r_buff0_thd3 ? z$w_buff0 : (z$w_buff1_used && z$r_buff1_thd3 ? z$w_buff1 : z) [L783] 3 z$w_buff0_used = z$w_buff0_used && z$r_buff0_thd3 ? (_Bool)0 : z$w_buff0_used [L784] 3 z$w_buff1_used = z$w_buff0_used && z$r_buff0_thd3 || z$w_buff1_used && z$r_buff1_thd3 ? (_Bool)0 : z$w_buff1_used [L785] 3 z$r_buff0_thd3 = z$w_buff0_used && z$r_buff0_thd3 ? (_Bool)0 : z$r_buff0_thd3 [L786] 3 z$r_buff1_thd3 = z$w_buff0_used && z$r_buff0_thd3 || z$w_buff1_used && z$r_buff1_thd3 ? (_Bool)0 : z$r_buff1_thd3 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=2, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=1] [L812] 4 z = z$w_buff0_used && z$r_buff0_thd4 ? z$w_buff0 : (z$w_buff1_used && z$r_buff1_thd4 ? z$w_buff1 : z) [L813] 4 z$w_buff0_used = z$w_buff0_used && z$r_buff0_thd4 ? (_Bool)0 : z$w_buff0_used [L814] 4 z$w_buff1_used = z$w_buff0_used && z$r_buff0_thd4 || z$w_buff1_used && z$r_buff1_thd4 ? (_Bool)0 : z$w_buff1_used [L815] 4 z$r_buff0_thd4 = z$w_buff0_used && z$r_buff0_thd4 ? (_Bool)0 : z$r_buff0_thd4 [L816] 4 z$r_buff1_thd4 = z$w_buff0_used && z$r_buff0_thd4 || z$w_buff1_used && z$r_buff1_thd4 ? (_Bool)0 : z$r_buff1_thd4 VAL [__unbuffered_cnt=0, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=2, y=2, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=2] [L769] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L771] 2 return 0; [L789] 3 __unbuffered_cnt = __unbuffered_cnt + 1 [L791] 3 return 0; [L754] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L756] 1 return 0; [L819] 4 __unbuffered_cnt = __unbuffered_cnt + 1 [L821] 4 return 0; [L843] 0 main$tmp_guard0 = __unbuffered_cnt == 4 [L845] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) [L845] RET 0 assume_abort_if_not(main$tmp_guard0) [L847] 0 z = z$w_buff0_used && z$r_buff0_thd0 ? z$w_buff0 : (z$w_buff1_used && z$r_buff1_thd0 ? z$w_buff1 : z) [L848] 0 z$w_buff0_used = z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : z$w_buff0_used [L849] 0 z$w_buff1_used = z$w_buff0_used && z$r_buff0_thd0 || z$w_buff1_used && z$r_buff1_thd0 ? (_Bool)0 : z$w_buff1_used [L850] 0 z$r_buff0_thd0 = z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : z$r_buff0_thd0 [L851] 0 z$r_buff1_thd0 = z$w_buff0_used && z$r_buff0_thd0 || z$w_buff1_used && z$r_buff1_thd0 ? (_Bool)0 : z$r_buff1_thd0 VAL [\result={0:0}, \result={0:0}, \result={0:0}, __unbuffered_cnt=4, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=1, main$tmp_guard1=0, t1517={5:0}, t1518={6:0}, t1519={7:0}, t1520={3:0}, weak$$choice0=0, weak$$choice2=0, x=2, y=2, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=2] [L854] 0 weak$$choice0 = __VERIFIER_nondet_bool() [L855] 0 weak$$choice2 = __VERIFIER_nondet_bool() [L856] 0 z$flush_delayed = weak$$choice2 [L857] 0 z$mem_tmp = z [L858] 0 z = !z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z : (z$w_buff0_used && z$r_buff0_thd0 ? z$w_buff0 : z$w_buff1) [L859] 0 z$w_buff0 = weak$$choice2 ? z$w_buff0 : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$w_buff0 : (z$w_buff0_used && z$r_buff0_thd0 ? z$w_buff0 : z$w_buff0)) [L860] 0 z$w_buff1 = weak$$choice2 ? z$w_buff1 : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$w_buff1 : (z$w_buff0_used && z$r_buff0_thd0 ? z$w_buff1 : z$w_buff1)) [L861] 0 z$w_buff0_used = weak$$choice2 ? z$w_buff0_used : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$w_buff0_used : (z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : z$w_buff0_used)) [L862] 0 z$w_buff1_used = weak$$choice2 ? z$w_buff1_used : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$w_buff1_used : (z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : (_Bool)0)) [L863] 0 z$r_buff0_thd0 = weak$$choice2 ? z$r_buff0_thd0 : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$r_buff0_thd0 : (z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : z$r_buff0_thd0)) [L864] 0 z$r_buff1_thd0 = weak$$choice2 ? z$r_buff1_thd0 : (!z$w_buff0_used || !z$r_buff0_thd0 && !z$w_buff1_used || !z$r_buff0_thd0 && !z$r_buff1_thd0 ? z$r_buff1_thd0 : (z$w_buff0_used && z$r_buff0_thd0 ? (_Bool)0 : (_Bool)0)) [L865] 0 main$tmp_guard1 = !(x == 2 && y == 2 && z == 2 && __unbuffered_p3_EAX == 0) [L866] 0 z = z$flush_delayed ? z$mem_tmp : z [L867] 0 z$flush_delayed = (_Bool)0 [L869] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] CALL 0 reach_error() [L17] COND FALSE 0 !(0) [L17] 0 __assert_fail ("0", "mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={54:53}, \result={0:0}, \result={0:0}, \result={0:0}, __unbuffered_cnt=4, __unbuffered_p3_EAX=0, a=1, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=1, main$tmp_guard1=0, weak$$choice2=1, x=2, y=2, z$flush_delayed=0, z$mem_tmp=2, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff0_thd3=0, z$r_buff0_thd4=1, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=0, z$r_buff1_thd4=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=2, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=2] - UnprovableResult [Line: 17]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 837]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 839]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 841]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 835]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 170 locations, 15 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 40.7s, OverallIterations: 22, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 27.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 595 SdHoareTripleChecker+Valid, 2.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 595 mSDsluCounter, 80 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 34 mSDsCounter, 104 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1817 IncrementalHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 104 mSolverCounterUnsat, 46 mSDtfsCounter, 1817 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1737occurred in iteration=17, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 333 NumberOfCodeBlocks, 333 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 287 ConstructedInterpolants, 0 QuantifiedInterpolants, 3209 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 21 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-26 18:19:30,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...