/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/thin002_power.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:29:58,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:29:58,688 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 18:29:58,692 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:29:58,693 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:29:58,717 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:29:58,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:29:58,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:29:58,719 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:29:58,722 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:29:58,723 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:29:58,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:29:58,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:29:58,724 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:29:58,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:29:58,725 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:29:58,725 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:29:58,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:29:58,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:29:58,726 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:29:58,726 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:29:58,727 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:29:58,727 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:29:58,727 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:29:58,728 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:29:58,728 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:29:58,728 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:29:58,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:29:58,729 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:29:58,729 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:29:58,730 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:29:58,730 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:29:58,730 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:29:58,730 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:29:58,731 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:29:58,731 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:29:59,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:29:59,083 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:29:59,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:29:59,086 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:29:59,086 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:29:59,089 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2023-08-26 18:30:00,209 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:30:00,481 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:30:00,481 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2023-08-26 18:30:00,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cc40f9bf/32da7933adef4647b93e6d2758311560/FLAGfd3e0de32 [2023-08-26 18:30:00,518 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cc40f9bf/32da7933adef4647b93e6d2758311560 [2023-08-26 18:30:00,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:30:00,524 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:30:00,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:00,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:30:00,532 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:30:00,532 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:00" (1/1) ... [2023-08-26 18:30:00,533 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35db76ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:00, skipping insertion in model container [2023-08-26 18:30:00,533 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:00" (1/1) ... [2023-08-26 18:30:00,589 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:30:00,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:00,993 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:30:01,025 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:30:01,026 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:30:01,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:01,122 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:30:01,123 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:30:01,129 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:30:01,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01 WrapperNode [2023-08-26 18:30:01,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:01,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:01,131 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:30:01,131 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:30:01,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,169 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,199 INFO L138 Inliner]: procedures = 177, calls = 85, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 206 [2023-08-26 18:30:01,199 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:01,200 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:30:01,200 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:30:01,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:30:01,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,210 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,227 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:30:01,232 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:30:01,232 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:30:01,232 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:30:01,233 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (1/1) ... [2023-08-26 18:30:01,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:30:01,274 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 18:30:01,299 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 18:30:01,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:30:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:30:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:30:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:30:01,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:30:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:30:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:30:01,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:30:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:30:01,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:30:01,315 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:30:01,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:30:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 18:30:01,316 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 18:30:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:30:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:30:01,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:30:01,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:30:01,318 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 18:30:01,459 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:30:01,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:30:02,001 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:30:02,732 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:30:02,732 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:30:02,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:02 BoogieIcfgContainer [2023-08-26 18:30:02,735 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:30:02,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:30:02,736 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:30:02,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:30:02,739 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:30:00" (1/3) ... [2023-08-26 18:30:02,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d8c52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:02, skipping insertion in model container [2023-08-26 18:30:02,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:01" (2/3) ... [2023-08-26 18:30:02,740 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d8c52b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:02, skipping insertion in model container [2023-08-26 18:30:02,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:02" (3/3) ... [2023-08-26 18:30:02,741 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_power.opt.i [2023-08-26 18:30:02,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:30:02,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 40 error locations. [2023-08-26 18:30:02,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:30:02,875 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:30:02,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 191 transitions, 402 flow [2023-08-26 18:30:02,969 INFO L124 PetriNetUnfolderBase]: 3/187 cut-off events. [2023-08-26 18:30:02,970 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:02,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 3/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 254 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2023-08-26 18:30:02,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 191 transitions, 402 flow [2023-08-26 18:30:02,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 187 transitions, 386 flow [2023-08-26 18:30:02,984 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:30:02,991 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 187 transitions, 386 flow [2023-08-26 18:30:02,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 187 transitions, 386 flow [2023-08-26 18:30:02,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 187 transitions, 386 flow [2023-08-26 18:30:03,053 INFO L124 PetriNetUnfolderBase]: 3/187 cut-off events. [2023-08-26 18:30:03,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:03,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 187 events. 3/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 257 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2023-08-26 18:30:03,059 INFO L119 LiptonReduction]: Number of co-enabled transitions 6594 [2023-08-26 18:30:15,874 INFO L134 LiptonReduction]: Checked pairs total: 28698 [2023-08-26 18:30:15,875 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-26 18:30:15,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:30:15,892 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;@3b0b39a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:30:15,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 69 error locations. [2023-08-26 18:30:15,893 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:30:15,893 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:30:15,893 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:15,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:15,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:30:15,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:15,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:15,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1229, now seen corresponding path program 1 times [2023-08-26 18:30:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890148090] [2023-08-26 18:30:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:16,018 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 18:30:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890148090] [2023-08-26 18:30:16,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890148090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:16,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:16,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:30:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402843818] [2023-08-26 18:30:16,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:16,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:30:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:16,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:30:16,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:30:16,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 358 [2023-08-26 18:30:16,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 160 flow. Second operand has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:16,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:16,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 358 [2023-08-26 18:30:16,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:23,252 INFO L124 PetriNetUnfolderBase]: 44651/59369 cut-off events. [2023-08-26 18:30:23,253 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-08-26 18:30:23,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118837 conditions, 59369 events. 44651/59369 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 3733. Compared 383919 event pairs, 44651 based on Foata normal form. 900/37027 useless extension candidates. Maximal degree in co-relation 118825. Up to 59257 conditions per place. [2023-08-26 18:30:23,654 INFO L140 encePairwiseOnDemand]: 334/358 looper letters, 45 selfloop transitions, 0 changer transitions 0/49 dead transitions. [2023-08-26 18:30:23,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 200 flow [2023-08-26 18:30:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:30:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:30:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 361 transitions. [2023-08-26 18:30:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041899441340782 [2023-08-26 18:30:23,671 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 361 transitions. [2023-08-26 18:30:23,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 361 transitions. [2023-08-26 18:30:23,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:23,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 361 transitions. [2023-08-26 18:30:23,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 180.5) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,687 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,688 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 160 flow. Second operand 2 states and 361 transitions. [2023-08-26 18:30:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 200 flow [2023-08-26 18:30:23,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 196 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:30:23,696 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 106 flow [2023-08-26 18:30:23,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-26 18:30:23,701 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -26 predicate places. [2023-08-26 18:30:23,701 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 106 flow [2023-08-26 18:30:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:23,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:30:23,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:23,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 277377406, now seen corresponding path program 1 times [2023-08-26 18:30:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:23,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925449008] [2023-08-26 18:30:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:23,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:24,082 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 18:30:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925449008] [2023-08-26 18:30:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925449008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:24,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:24,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:24,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388288286] [2023-08-26 18:30:24,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:24,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:24,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:24,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 358 [2023-08-26 18:30:24,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:24,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:24,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 358 [2023-08-26 18:30:24,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:29,298 INFO L124 PetriNetUnfolderBase]: 40043/53231 cut-off events. [2023-08-26 18:30:29,298 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:29,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106612 conditions, 53231 events. 40043/53231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3348. Compared 362869 event pairs, 7787 based on Foata normal form. 0/33121 useless extension candidates. Maximal degree in co-relation 106609. Up to 42463 conditions per place. [2023-08-26 18:30:29,618 INFO L140 encePairwiseOnDemand]: 355/358 looper letters, 72 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-26 18:30:29,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 78 transitions, 314 flow [2023-08-26 18:30:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2023-08-26 18:30:29,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748603351955307 [2023-08-26 18:30:29,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2023-08-26 18:30:29,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2023-08-26 18:30:29,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:29,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2023-08-26 18:30:29,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:29,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:29,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:29,631 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 106 flow. Second operand 3 states and 510 transitions. [2023-08-26 18:30:29,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 78 transitions, 314 flow [2023-08-26 18:30:29,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:30:29,634 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 108 flow [2023-08-26 18:30:29,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-26 18:30:29,636 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -25 predicate places. [2023-08-26 18:30:29,636 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 108 flow [2023-08-26 18:30:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:29,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:29,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:29,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:30:29,641 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:29,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash 8766014, now seen corresponding path program 1 times [2023-08-26 18:30:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:29,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088501857] [2023-08-26 18:30:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:29,780 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 18:30:29,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088501857] [2023-08-26 18:30:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088501857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:29,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:29,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:29,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034903982] [2023-08-26 18:30:29,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:29,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:29,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:29,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:29,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:29,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 18:30:29,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:29,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:29,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 18:30:29,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:36,499 INFO L124 PetriNetUnfolderBase]: 50957/67664 cut-off events. [2023-08-26 18:30:36,499 INFO L125 PetriNetUnfolderBase]: For 1449/1449 co-relation queries the response was YES. [2023-08-26 18:30:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136857 conditions, 67664 events. 50957/67664 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 4347. Compared 453533 event pairs, 33164 based on Foata normal form. 0/41641 useless extension candidates. Maximal degree in co-relation 136853. Up to 50515 conditions per place. [2023-08-26 18:30:36,846 INFO L140 encePairwiseOnDemand]: 351/358 looper letters, 72 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-26 18:30:36,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 330 flow [2023-08-26 18:30:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-26 18:30:36,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4757914338919926 [2023-08-26 18:30:36,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-26 18:30:36,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-26 18:30:36,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:36,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-26 18:30:36,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:36,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:36,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:36,855 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 108 flow. Second operand 3 states and 511 transitions. [2023-08-26 18:30:36,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 330 flow [2023-08-26 18:30:36,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 81 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:36,863 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 139 flow [2023-08-26 18:30:36,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-08-26 18:30:36,864 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -24 predicate places. [2023-08-26 18:30:36,864 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 139 flow [2023-08-26 18:30:36,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:36,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:36,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:36,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:30:36,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:36,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 8766016, now seen corresponding path program 1 times [2023-08-26 18:30:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288476130] [2023-08-26 18:30:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:37,100 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 18:30:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288476130] [2023-08-26 18:30:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288476130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:37,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416842196] [2023-08-26 18:30:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:37,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 358 [2023-08-26 18:30:37,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:37,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:37,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 358 [2023-08-26 18:30:37,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:42,361 INFO L124 PetriNetUnfolderBase]: 35531/48287 cut-off events. [2023-08-26 18:30:42,361 INFO L125 PetriNetUnfolderBase]: For 7722/7938 co-relation queries the response was YES. [2023-08-26 18:30:42,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106536 conditions, 48287 events. 35531/48287 cut-off events. For 7722/7938 co-relation queries the response was YES. Maximal size of possible extension queue 2671. Compared 314371 event pairs, 17687 based on Foata normal form. 0/40156 useless extension candidates. Maximal degree in co-relation 106531. Up to 22194 conditions per place. [2023-08-26 18:30:42,624 INFO L140 encePairwiseOnDemand]: 343/358 looper letters, 76 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2023-08-26 18:30:42,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 90 transitions, 426 flow [2023-08-26 18:30:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 586 transitions. [2023-08-26 18:30:42,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092178770949721 [2023-08-26 18:30:42,626 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 586 transitions. [2023-08-26 18:30:42,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 586 transitions. [2023-08-26 18:30:42,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:42,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 586 transitions. [2023-08-26 18:30:42,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:42,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:42,631 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:42,632 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 139 flow. Second operand 4 states and 586 transitions. [2023-08-26 18:30:42,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 90 transitions, 426 flow [2023-08-26 18:30:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 90 transitions, 414 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:42,759 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 242 flow [2023-08-26 18:30:42,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-26 18:30:42,760 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -21 predicate places. [2023-08-26 18:30:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 242 flow [2023-08-26 18:30:42,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:42,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:42,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:30:42,761 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:42,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 8766017, now seen corresponding path program 1 times [2023-08-26 18:30:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766749457] [2023-08-26 18:30:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:42,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:42,989 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 18:30:42,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:42,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766749457] [2023-08-26 18:30:42,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766749457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:42,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:42,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125550649] [2023-08-26 18:30:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:42,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:42,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 358 [2023-08-26 18:30:42,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:42,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:42,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 358 [2023-08-26 18:30:42,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:45,212 INFO L124 PetriNetUnfolderBase]: 14294/19940 cut-off events. [2023-08-26 18:30:45,212 INFO L125 PetriNetUnfolderBase]: For 12294/12420 co-relation queries the response was YES. [2023-08-26 18:30:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55570 conditions, 19940 events. 14294/19940 cut-off events. For 12294/12420 co-relation queries the response was YES. Maximal size of possible extension queue 1110. Compared 120765 event pairs, 6071 based on Foata normal form. 3942/22654 useless extension candidates. Maximal degree in co-relation 55563. Up to 12633 conditions per place. [2023-08-26 18:30:45,311 INFO L140 encePairwiseOnDemand]: 349/358 looper letters, 59 selfloop transitions, 2 changer transitions 1/65 dead transitions. [2023-08-26 18:30:45,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 65 transitions, 398 flow [2023-08-26 18:30:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2023-08-26 18:30:45,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37639664804469275 [2023-08-26 18:30:45,316 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2023-08-26 18:30:45,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2023-08-26 18:30:45,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:45,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2023-08-26 18:30:45,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:45,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:45,326 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:45,326 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 242 flow. Second operand 4 states and 539 transitions. [2023-08-26 18:30:45,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 65 transitions, 398 flow [2023-08-26 18:30:45,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:45,338 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 226 flow [2023-08-26 18:30:45,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-26 18:30:45,341 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -26 predicate places. [2023-08-26 18:30:45,341 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 226 flow [2023-08-26 18:30:45,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.8) internal successors, (609), 5 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:45,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:45,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:45,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:30:45,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:45,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash 977816914, now seen corresponding path program 1 times [2023-08-26 18:30:45,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:45,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845996017] [2023-08-26 18:30:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:45,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:45,424 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 18:30:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:45,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845996017] [2023-08-26 18:30:45,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845996017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:45,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:45,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746451347] [2023-08-26 18:30:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:45,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:45,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:45,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 358 [2023-08-26 18:30:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 358 [2023-08-26 18:30:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:47,515 INFO L124 PetriNetUnfolderBase]: 13226/18647 cut-off events. [2023-08-26 18:30:47,516 INFO L125 PetriNetUnfolderBase]: For 10431/10431 co-relation queries the response was YES. [2023-08-26 18:30:47,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52328 conditions, 18647 events. 13226/18647 cut-off events. For 10431/10431 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 114871 event pairs, 4169 based on Foata normal form. 0/17770 useless extension candidates. Maximal degree in co-relation 52320. Up to 14395 conditions per place. [2023-08-26 18:30:47,631 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 67 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2023-08-26 18:30:47,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 479 flow [2023-08-26 18:30:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:47,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-26 18:30:47,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553072625698324 [2023-08-26 18:30:47,633 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-26 18:30:47,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-26 18:30:47,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:47,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-26 18:30:47,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:47,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:47,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:47,638 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 226 flow. Second operand 3 states and 489 transitions. [2023-08-26 18:30:47,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 479 flow [2023-08-26 18:30:47,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 475 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:47,644 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 242 flow [2023-08-26 18:30:47,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2023-08-26 18:30:47,645 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -26 predicate places. [2023-08-26 18:30:47,645 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 242 flow [2023-08-26 18:30:47,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:47,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:47,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:47,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:30:47,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:47,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash 977817192, now seen corresponding path program 1 times [2023-08-26 18:30:47,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:47,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548458836] [2023-08-26 18:30:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:47,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:47,763 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 18:30:47,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548458836] [2023-08-26 18:30:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548458836] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:47,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:47,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703908989] [2023-08-26 18:30:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:47,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:47,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:47,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 18:30:47,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:47,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:47,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 18:30:47,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:49,485 INFO L124 PetriNetUnfolderBase]: 12992/18401 cut-off events. [2023-08-26 18:30:49,485 INFO L125 PetriNetUnfolderBase]: For 14226/14292 co-relation queries the response was YES. [2023-08-26 18:30:49,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53229 conditions, 18401 events. 12992/18401 cut-off events. For 14226/14292 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 113996 event pairs, 6075 based on Foata normal form. 0/17755 useless extension candidates. Maximal degree in co-relation 53220. Up to 13119 conditions per place. [2023-08-26 18:30:49,609 INFO L140 encePairwiseOnDemand]: 355/358 looper letters, 87 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-26 18:30:49,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 636 flow [2023-08-26 18:30:49,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:49,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-26 18:30:49,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4618249534450652 [2023-08-26 18:30:49,611 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-26 18:30:49,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-26 18:30:49,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:49,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-26 18:30:49,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:49,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:49,615 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:49,615 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 242 flow. Second operand 3 states and 496 transitions. [2023-08-26 18:30:49,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 636 flow [2023-08-26 18:30:49,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 618 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:49,626 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 240 flow [2023-08-26 18:30:49,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-26 18:30:49,626 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -25 predicate places. [2023-08-26 18:30:49,627 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 240 flow [2023-08-26 18:30:49,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:49,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:49,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:49,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:30:49,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:49,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash 291116537, now seen corresponding path program 1 times [2023-08-26 18:30:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:49,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271110685] [2023-08-26 18:30:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:49,853 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 18:30:49,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:49,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271110685] [2023-08-26 18:30:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271110685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:49,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:49,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247643421] [2023-08-26 18:30:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:49,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:49,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:49,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 358 [2023-08-26 18:30:49,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:49,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:49,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 358 [2023-08-26 18:30:49,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:51,645 INFO L124 PetriNetUnfolderBase]: 13048/18744 cut-off events. [2023-08-26 18:30:51,645 INFO L125 PetriNetUnfolderBase]: For 14752/14896 co-relation queries the response was YES. [2023-08-26 18:30:51,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56311 conditions, 18744 events. 13048/18744 cut-off events. For 14752/14896 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 120060 event pairs, 3666 based on Foata normal form. 12/18269 useless extension candidates. Maximal degree in co-relation 56301. Up to 16936 conditions per place. [2023-08-26 18:30:51,796 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 75 selfloop transitions, 6 changer transitions 0/84 dead transitions. [2023-08-26 18:30:51,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 84 transitions, 561 flow [2023-08-26 18:30:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2023-08-26 18:30:51,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985102420856611 [2023-08-26 18:30:51,798 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2023-08-26 18:30:51,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2023-08-26 18:30:51,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:51,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2023-08-26 18:30:51,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:51,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:51,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:51,801 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 240 flow. Second operand 3 states and 428 transitions. [2023-08-26 18:30:51,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 84 transitions, 561 flow [2023-08-26 18:30:51,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:51,807 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 300 flow [2023-08-26 18:30:51,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2023-08-26 18:30:51,808 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -24 predicate places. [2023-08-26 18:30:51,808 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 300 flow [2023-08-26 18:30:51,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:51,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:51,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:51,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:30:51,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:51,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:51,809 INFO L85 PathProgramCache]: Analyzing trace with hash 247559430, now seen corresponding path program 1 times [2023-08-26 18:30:51,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785861377] [2023-08-26 18:30:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:51,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:52,181 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 18:30:52,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:52,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785861377] [2023-08-26 18:30:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785861377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:52,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:52,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052710340] [2023-08-26 18:30:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:52,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 358 [2023-08-26 18:30:52,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:52,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:52,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 358 [2023-08-26 18:30:52,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:54,036 INFO L124 PetriNetUnfolderBase]: 12589/17769 cut-off events. [2023-08-26 18:30:54,036 INFO L125 PetriNetUnfolderBase]: For 13088/13088 co-relation queries the response was YES. [2023-08-26 18:30:54,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55566 conditions, 17769 events. 12589/17769 cut-off events. For 13088/13088 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 109087 event pairs, 4094 based on Foata normal form. 0/17441 useless extension candidates. Maximal degree in co-relation 55555. Up to 13518 conditions per place. [2023-08-26 18:30:54,183 INFO L140 encePairwiseOnDemand]: 355/358 looper letters, 67 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2023-08-26 18:30:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 559 flow [2023-08-26 18:30:54,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:54,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-08-26 18:30:54,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39455307262569833 [2023-08-26 18:30:54,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-08-26 18:30:54,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-08-26 18:30:54,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:54,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-08-26 18:30:54,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:54,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:54,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:54,190 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 300 flow. Second operand 4 states and 565 transitions. [2023-08-26 18:30:54,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 559 flow [2023-08-26 18:30:54,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:54,196 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 308 flow [2023-08-26 18:30:54,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-26 18:30:54,197 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -23 predicate places. [2023-08-26 18:30:54,197 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 308 flow [2023-08-26 18:30:54,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:54,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:54,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:54,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:30:54,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:54,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 247559429, now seen corresponding path program 1 times [2023-08-26 18:30:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:54,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611226451] [2023-08-26 18:30:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:54,523 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 18:30:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611226451] [2023-08-26 18:30:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611226451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:54,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:30:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259484662] [2023-08-26 18:30:54,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:30:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:30:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:30:54,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 358 [2023-08-26 18:30:54,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:54,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:54,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 358 [2023-08-26 18:30:54,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:56,566 INFO L124 PetriNetUnfolderBase]: 13588/19254 cut-off events. [2023-08-26 18:30:56,566 INFO L125 PetriNetUnfolderBase]: For 15849/15849 co-relation queries the response was YES. [2023-08-26 18:30:56,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59971 conditions, 19254 events. 13588/19254 cut-off events. For 15849/15849 co-relation queries the response was YES. Maximal size of possible extension queue 1171. Compared 120874 event pairs, 2065 based on Foata normal form. 162/19088 useless extension candidates. Maximal degree in co-relation 59960. Up to 10438 conditions per place. [2023-08-26 18:30:56,708 INFO L140 encePairwiseOnDemand]: 349/358 looper letters, 91 selfloop transitions, 29 changer transitions 1/124 dead transitions. [2023-08-26 18:30:56,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 124 transitions, 856 flow [2023-08-26 18:30:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:30:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:30:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 825 transitions. [2023-08-26 18:30:56,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840782122905028 [2023-08-26 18:30:56,711 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 825 transitions. [2023-08-26 18:30:56,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 825 transitions. [2023-08-26 18:30:56,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:56,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 825 transitions. [2023-08-26 18:30:56,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.5) internal successors, (825), 6 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:56,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:56,716 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 358.0) internal successors, (2506), 7 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:56,716 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 308 flow. Second operand 6 states and 825 transitions. [2023-08-26 18:30:56,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 124 transitions, 856 flow [2023-08-26 18:30:56,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 124 transitions, 829 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:30:56,724 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 493 flow [2023-08-26 18:30:56,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2023-08-26 18:30:56,725 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -21 predicate places. [2023-08-26 18:30:56,725 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 493 flow [2023-08-26 18:30:56,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:56,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:56,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:30:56,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:56,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1282431156, now seen corresponding path program 1 times [2023-08-26 18:30:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170775451] [2023-08-26 18:30:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:56,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:56,853 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 18:30:56,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:56,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170775451] [2023-08-26 18:30:56,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170775451] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:56,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:56,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:56,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636676389] [2023-08-26 18:30:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:56,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:30:56,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:56,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:30:56,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:30:56,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 358 [2023-08-26 18:30:56,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 493 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:56,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:56,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 358 [2023-08-26 18:30:56,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:59,602 INFO L124 PetriNetUnfolderBase]: 22311/32298 cut-off events. [2023-08-26 18:30:59,602 INFO L125 PetriNetUnfolderBase]: For 41044/41044 co-relation queries the response was YES. [2023-08-26 18:30:59,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100971 conditions, 32298 events. 22311/32298 cut-off events. For 41044/41044 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 227061 event pairs, 4205 based on Foata normal form. 168/31913 useless extension candidates. Maximal degree in co-relation 100960. Up to 13581 conditions per place. [2023-08-26 18:30:59,870 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 143 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2023-08-26 18:30:59,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 149 transitions, 1248 flow [2023-08-26 18:30:59,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:30:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:30:59,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-26 18:30:59,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44692737430167595 [2023-08-26 18:30:59,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-26 18:30:59,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-26 18:30:59,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:59,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-26 18:30:59,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:59,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:59,876 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:59,876 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 493 flow. Second operand 4 states and 640 transitions. [2023-08-26 18:30:59,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 149 transitions, 1248 flow [2023-08-26 18:30:59,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 149 transitions, 1236 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 18:30:59,898 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 502 flow [2023-08-26 18:30:59,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=502, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2023-08-26 18:30:59,898 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -16 predicate places. [2023-08-26 18:30:59,899 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 502 flow [2023-08-26 18:30:59,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:59,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:59,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:59,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:30:59,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:30:59,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -915504317, now seen corresponding path program 1 times [2023-08-26 18:30:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341069824] [2023-08-26 18:30:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:59,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:31:00,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:00,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341069824] [2023-08-26 18:31:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341069824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:31:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420675118] [2023-08-26 18:31:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:00,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:31:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:00,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:31:00,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:31:00,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 358 [2023-08-26 18:31:00,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 502 flow. Second operand has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:00,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:00,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 358 [2023-08-26 18:31:00,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:02,826 INFO L124 PetriNetUnfolderBase]: 18061/25748 cut-off events. [2023-08-26 18:31:02,827 INFO L125 PetriNetUnfolderBase]: For 31489/31513 co-relation queries the response was YES. [2023-08-26 18:31:02,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85955 conditions, 25748 events. 18061/25748 cut-off events. For 31489/31513 co-relation queries the response was YES. Maximal size of possible extension queue 1515. Compared 170700 event pairs, 5985 based on Foata normal form. 330/25661 useless extension candidates. Maximal degree in co-relation 85941. Up to 10375 conditions per place. [2023-08-26 18:31:02,964 INFO L140 encePairwiseOnDemand]: 346/358 looper letters, 84 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2023-08-26 18:31:02,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 962 flow [2023-08-26 18:31:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:31:02,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:31:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-26 18:31:02,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812849162011173 [2023-08-26 18:31:02,966 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-26 18:31:02,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-26 18:31:02,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:02,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-26 18:31:02,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:02,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:02,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:02,970 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 502 flow. Second operand 4 states and 546 transitions. [2023-08-26 18:31:02,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 962 flow [2023-08-26 18:31:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 112 transitions, 956 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:31:03,014 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 730 flow [2023-08-26 18:31:03,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=730, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2023-08-26 18:31:03,015 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -13 predicate places. [2023-08-26 18:31:03,015 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 730 flow [2023-08-26 18:31:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:03,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:03,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 18:31:03,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:03,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1530023140, now seen corresponding path program 1 times [2023-08-26 18:31:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849442389] [2023-08-26 18:31:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:03,167 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 18:31:03,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:03,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849442389] [2023-08-26 18:31:03,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849442389] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:03,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:03,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:31:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199311298] [2023-08-26 18:31:03,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:03,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:31:03,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:31:03,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:31:03,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 18:31:03,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 730 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:03,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:03,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 18:31:03,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:05,567 INFO L124 PetriNetUnfolderBase]: 17857/25552 cut-off events. [2023-08-26 18:31:05,567 INFO L125 PetriNetUnfolderBase]: For 50667/50691 co-relation queries the response was YES. [2023-08-26 18:31:05,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91620 conditions, 25552 events. 17857/25552 cut-off events. For 50667/50691 co-relation queries the response was YES. Maximal size of possible extension queue 1519. Compared 171100 event pairs, 8438 based on Foata normal form. 60/25195 useless extension candidates. Maximal degree in co-relation 91605. Up to 18165 conditions per place. [2023-08-26 18:31:05,781 INFO L140 encePairwiseOnDemand]: 355/358 looper letters, 133 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2023-08-26 18:31:05,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 140 transitions, 1432 flow [2023-08-26 18:31:05,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:31:05,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:31:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-26 18:31:05,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45623836126629425 [2023-08-26 18:31:05,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-26 18:31:05,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-26 18:31:05,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:05,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-26 18:31:05,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:05,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:05,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:05,786 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 730 flow. Second operand 3 states and 490 transitions. [2023-08-26 18:31:05,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 140 transitions, 1432 flow [2023-08-26 18:31:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 140 transitions, 1392 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 18:31:05,927 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 720 flow [2023-08-26 18:31:05,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=720, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2023-08-26 18:31:05,928 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -12 predicate places. [2023-08-26 18:31:05,928 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 720 flow [2023-08-26 18:31:05,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:05,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:05,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:05,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 18:31:05,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:05,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1684139816, now seen corresponding path program 1 times [2023-08-26 18:31:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:05,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842581663] [2023-08-26 18:31:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:05,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:06,149 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 18:31:06,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:06,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842581663] [2023-08-26 18:31:06,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842581663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:06,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:06,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:31:06,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767701458] [2023-08-26 18:31:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:06,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:31:06,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:31:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:31:06,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 358 [2023-08-26 18:31:06,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 720 flow. Second operand has 8 states, 8 states have (on average 118.875) internal successors, (951), 8 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:06,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:06,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 358 [2023-08-26 18:31:06,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:09,384 INFO L124 PetriNetUnfolderBase]: 20385/29576 cut-off events. [2023-08-26 18:31:09,384 INFO L125 PetriNetUnfolderBase]: For 62328/62356 co-relation queries the response was YES. [2023-08-26 18:31:09,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107199 conditions, 29576 events. 20385/29576 cut-off events. For 62328/62356 co-relation queries the response was YES. Maximal size of possible extension queue 1684. Compared 205938 event pairs, 3609 based on Foata normal form. 334/29581 useless extension candidates. Maximal degree in co-relation 107183. Up to 9025 conditions per place. [2023-08-26 18:31:09,623 INFO L140 encePairwiseOnDemand]: 343/358 looper letters, 169 selfloop transitions, 59 changer transitions 0/231 dead transitions. [2023-08-26 18:31:09,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 231 transitions, 2292 flow [2023-08-26 18:31:09,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:31:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:31:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 927 transitions. [2023-08-26 18:31:09,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699122106943336 [2023-08-26 18:31:09,626 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 927 transitions. [2023-08-26 18:31:09,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 927 transitions. [2023-08-26 18:31:09,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:09,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 927 transitions. [2023-08-26 18:31:09,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.42857142857142) internal successors, (927), 7 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:09,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 358.0) internal successors, (2864), 8 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:09,632 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 358.0) internal successors, (2864), 8 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:09,632 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 720 flow. Second operand 7 states and 927 transitions. [2023-08-26 18:31:09,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 231 transitions, 2292 flow [2023-08-26 18:31:09,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 231 transitions, 2270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:31:09,704 INFO L231 Difference]: Finished difference. Result has 81 places, 130 transitions, 1475 flow [2023-08-26 18:31:09,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1475, PETRI_PLACES=81, PETRI_TRANSITIONS=130} [2023-08-26 18:31:09,705 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, -4 predicate places. [2023-08-26 18:31:09,705 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 130 transitions, 1475 flow [2023-08-26 18:31:09,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 118.875) internal successors, (951), 8 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:09,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:09,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:09,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 18:31:09,706 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:09,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2115704849, now seen corresponding path program 1 times [2023-08-26 18:31:09,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:09,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116262899] [2023-08-26 18:31:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:09,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:09,878 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 18:31:09,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:09,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116262899] [2023-08-26 18:31:09,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116262899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:09,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:09,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:31:09,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900803412] [2023-08-26 18:31:09,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:09,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:31:09,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:09,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:31:09,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:31:09,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 358 [2023-08-26 18:31:09,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 130 transitions, 1475 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:09,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:09,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 358 [2023-08-26 18:31:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:16,757 INFO L124 PetriNetUnfolderBase]: 39653/56760 cut-off events. [2023-08-26 18:31:16,757 INFO L125 PetriNetUnfolderBase]: For 213227/213291 co-relation queries the response was YES. [2023-08-26 18:31:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216757 conditions, 56760 events. 39653/56760 cut-off events. For 213227/213291 co-relation queries the response was YES. Maximal size of possible extension queue 2848. Compared 419900 event pairs, 7058 based on Foata normal form. 172/56273 useless extension candidates. Maximal degree in co-relation 216738. Up to 23440 conditions per place. [2023-08-26 18:31:17,135 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 327 selfloop transitions, 4 changer transitions 0/334 dead transitions. [2023-08-26 18:31:17,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 334 transitions, 4495 flow [2023-08-26 18:31:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:31:17,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:31:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 655 transitions. [2023-08-26 18:31:17,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574022346368715 [2023-08-26 18:31:17,137 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 655 transitions. [2023-08-26 18:31:17,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 655 transitions. [2023-08-26 18:31:17,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:17,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 655 transitions. [2023-08-26 18:31:17,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:17,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:17,141 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 358.0) internal successors, (1790), 5 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:17,141 INFO L175 Difference]: Start difference. First operand has 81 places, 130 transitions, 1475 flow. Second operand 4 states and 655 transitions. [2023-08-26 18:31:17,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 334 transitions, 4495 flow [2023-08-26 18:31:17,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 334 transitions, 4493 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 18:31:17,377 INFO L231 Difference]: Finished difference. Result has 86 places, 132 transitions, 1504 flow [2023-08-26 18:31:17,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1504, PETRI_PLACES=86, PETRI_TRANSITIONS=132} [2023-08-26 18:31:17,377 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 1 predicate places. [2023-08-26 18:31:17,377 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 132 transitions, 1504 flow [2023-08-26 18:31:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:17,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:31:17,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:17,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1953151299, now seen corresponding path program 1 times [2023-08-26 18:31:17,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:17,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732506487] [2023-08-26 18:31:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:17,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:31:17,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732506487] [2023-08-26 18:31:17,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732506487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:17,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:17,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 18:31:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389470330] [2023-08-26 18:31:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:17,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:31:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:31:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:31:17,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 358 [2023-08-26 18:31:17,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 132 transitions, 1504 flow. Second operand has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:17,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:17,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 358 [2023-08-26 18:31:17,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:23,626 INFO L124 PetriNetUnfolderBase]: 34597/48728 cut-off events. [2023-08-26 18:31:23,626 INFO L125 PetriNetUnfolderBase]: For 149810/149810 co-relation queries the response was YES. [2023-08-26 18:31:23,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196209 conditions, 48728 events. 34597/48728 cut-off events. For 149810/149810 co-relation queries the response was YES. Maximal size of possible extension queue 2595. Compared 341046 event pairs, 5739 based on Foata normal form. 270/48581 useless extension candidates. Maximal degree in co-relation 196187. Up to 11869 conditions per place. [2023-08-26 18:31:23,959 INFO L140 encePairwiseOnDemand]: 343/358 looper letters, 197 selfloop transitions, 62 changer transitions 0/261 dead transitions. [2023-08-26 18:31:23,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 261 transitions, 3056 flow [2023-08-26 18:31:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 18:31:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 18:31:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1025 transitions. [2023-08-26 18:31:23,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.357891061452514 [2023-08-26 18:31:23,962 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1025 transitions. [2023-08-26 18:31:23,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1025 transitions. [2023-08-26 18:31:23,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:23,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1025 transitions. [2023-08-26 18:31:23,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 128.125) internal successors, (1025), 8 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:23,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 358.0) internal successors, (3222), 9 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:23,968 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 358.0) internal successors, (3222), 9 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:23,968 INFO L175 Difference]: Start difference. First operand has 86 places, 132 transitions, 1504 flow. Second operand 8 states and 1025 transitions. [2023-08-26 18:31:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 261 transitions, 3056 flow [2023-08-26 18:31:24,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 261 transitions, 3031 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 18:31:24,264 INFO L231 Difference]: Finished difference. Result has 93 places, 161 transitions, 2152 flow [2023-08-26 18:31:24,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2152, PETRI_PLACES=93, PETRI_TRANSITIONS=161} [2023-08-26 18:31:24,265 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 8 predicate places. [2023-08-26 18:31:24,265 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 161 transitions, 2152 flow [2023-08-26 18:31:24,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.77777777777777) internal successors, (1051), 9 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:24,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:24,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:31:24,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:31:24,266 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:24,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:24,266 INFO L85 PathProgramCache]: Analyzing trace with hash 668729160, now seen corresponding path program 1 times [2023-08-26 18:31:24,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:24,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590378199] [2023-08-26 18:31:24,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:24,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:24,596 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 18:31:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590378199] [2023-08-26 18:31:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590378199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:24,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:24,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 18:31:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569171088] [2023-08-26 18:31:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:24,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:31:24,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:24,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:31:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-26 18:31:24,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 358 [2023-08-26 18:31:24,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 161 transitions, 2152 flow. Second operand has 10 states, 10 states have (on average 116.6) internal successors, (1166), 10 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:24,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:24,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 358 [2023-08-26 18:31:24,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:33,726 INFO L124 PetriNetUnfolderBase]: 44751/64876 cut-off events. [2023-08-26 18:31:33,727 INFO L125 PetriNetUnfolderBase]: For 296206/296327 co-relation queries the response was YES. [2023-08-26 18:31:34,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273091 conditions, 64876 events. 44751/64876 cut-off events. For 296206/296327 co-relation queries the response was YES. Maximal size of possible extension queue 3594. Compared 497542 event pairs, 9886 based on Foata normal form. 595/65122 useless extension candidates. Maximal degree in co-relation 273068. Up to 14488 conditions per place. [2023-08-26 18:31:34,388 INFO L140 encePairwiseOnDemand]: 342/358 looper letters, 238 selfloop transitions, 177 changer transitions 2/421 dead transitions. [2023-08-26 18:31:34,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 421 transitions, 5942 flow [2023-08-26 18:31:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:31:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:31:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1155 transitions. [2023-08-26 18:31:34,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3584729981378026 [2023-08-26 18:31:34,394 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1155 transitions. [2023-08-26 18:31:34,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1155 transitions. [2023-08-26 18:31:34,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:34,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1155 transitions. [2023-08-26 18:31:34,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.33333333333334) internal successors, (1155), 9 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:34,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 358.0) internal successors, (3580), 10 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:34,403 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 358.0) internal successors, (3580), 10 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:34,403 INFO L175 Difference]: Start difference. First operand has 93 places, 161 transitions, 2152 flow. Second operand 9 states and 1155 transitions. [2023-08-26 18:31:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 421 transitions, 5942 flow [2023-08-26 18:31:37,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 421 transitions, 5823 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:31:37,081 INFO L231 Difference]: Finished difference. Result has 104 places, 297 transitions, 4929 flow [2023-08-26 18:31:37,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=2107, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4929, PETRI_PLACES=104, PETRI_TRANSITIONS=297} [2023-08-26 18:31:37,081 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 19 predicate places. [2023-08-26 18:31:37,081 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 297 transitions, 4929 flow [2023-08-26 18:31:37,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.6) internal successors, (1166), 10 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:37,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:37,082 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 18:31:37,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:31:37,083 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:37,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1658121178, now seen corresponding path program 1 times [2023-08-26 18:31:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760002882] [2023-08-26 18:31:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:37,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:37,231 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 18:31:37,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:37,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760002882] [2023-08-26 18:31:37,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760002882] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:37,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:37,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:31:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30617834] [2023-08-26 18:31:37,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:31:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:31:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:31:37,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 18:31:37,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 297 transitions, 4929 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:37,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:37,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 18:31:37,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:31:46,611 INFO L124 PetriNetUnfolderBase]: 44126/63252 cut-off events. [2023-08-26 18:31:46,612 INFO L125 PetriNetUnfolderBase]: For 402886/403171 co-relation queries the response was YES. [2023-08-26 18:31:46,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292888 conditions, 63252 events. 44126/63252 cut-off events. For 402886/403171 co-relation queries the response was YES. Maximal size of possible extension queue 3561. Compared 476287 event pairs, 10058 based on Foata normal form. 148/63034 useless extension candidates. Maximal degree in co-relation 292860. Up to 53984 conditions per place. [2023-08-26 18:31:47,127 INFO L140 encePairwiseOnDemand]: 355/358 looper letters, 421 selfloop transitions, 2 changer transitions 0/428 dead transitions. [2023-08-26 18:31:47,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 428 transitions, 7895 flow [2023-08-26 18:31:47,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:31:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:31:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-26 18:31:47,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506517690875233 [2023-08-26 18:31:47,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-26 18:31:47,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-26 18:31:47,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:31:47,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-26 18:31:47,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:47,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:47,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:47,131 INFO L175 Difference]: Start difference. First operand has 104 places, 297 transitions, 4929 flow. Second operand 3 states and 484 transitions. [2023-08-26 18:31:47,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 428 transitions, 7895 flow [2023-08-26 18:31:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 428 transitions, 7892 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:31:50,904 INFO L231 Difference]: Finished difference. Result has 106 places, 297 transitions, 4934 flow [2023-08-26 18:31:50,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=4926, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4934, PETRI_PLACES=106, PETRI_TRANSITIONS=297} [2023-08-26 18:31:50,905 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 21 predicate places. [2023-08-26 18:31:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 297 transitions, 4934 flow [2023-08-26 18:31:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:50,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:31:50,906 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 18:31:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:31:50,907 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:31:50,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:31:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -744228182, now seen corresponding path program 1 times [2023-08-26 18:31:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:31:50,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208937065] [2023-08-26 18:31:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:31:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:31:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:31:51,325 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 18:31:51,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:31:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208937065] [2023-08-26 18:31:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208937065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:31:51,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:31:51,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 18:31:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468935954] [2023-08-26 18:31:51,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:31:51,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 18:31:51,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:31:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 18:31:51,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-26 18:31:51,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 358 [2023-08-26 18:31:51,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 297 transitions, 4934 flow. Second operand has 12 states, 12 states have (on average 114.41666666666667) internal successors, (1373), 12 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:31:51,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:31:51,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 358 [2023-08-26 18:31:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:04,959 INFO L124 PetriNetUnfolderBase]: 58938/85014 cut-off events. [2023-08-26 18:32:04,959 INFO L125 PetriNetUnfolderBase]: For 562924/563067 co-relation queries the response was YES. [2023-08-26 18:32:05,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394977 conditions, 85014 events. 58938/85014 cut-off events. For 562924/563067 co-relation queries the response was YES. Maximal size of possible extension queue 4817. Compared 670291 event pairs, 11899 based on Foata normal form. 643/85315 useless extension candidates. Maximal degree in co-relation 394947. Up to 18749 conditions per place. [2023-08-26 18:32:05,671 INFO L140 encePairwiseOnDemand]: 341/358 looper letters, 204 selfloop transitions, 211 changer transitions 119/538 dead transitions. [2023-08-26 18:32:05,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 538 transitions, 8846 flow [2023-08-26 18:32:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 18:32:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 18:32:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1377 transitions. [2023-08-26 18:32:05,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34966988318943626 [2023-08-26 18:32:05,673 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1377 transitions. [2023-08-26 18:32:05,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1377 transitions. [2023-08-26 18:32:05,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:05,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1377 transitions. [2023-08-26 18:32:05,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 125.18181818181819) internal successors, (1377), 11 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:05,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:05,679 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 358.0) internal successors, (4296), 12 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:05,679 INFO L175 Difference]: Start difference. First operand has 106 places, 297 transitions, 4934 flow. Second operand 11 states and 1377 transitions. [2023-08-26 18:32:05,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 538 transitions, 8846 flow [2023-08-26 18:32:14,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 538 transitions, 8828 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:32:14,845 INFO L231 Difference]: Finished difference. Result has 120 places, 318 transitions, 6133 flow [2023-08-26 18:32:14,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6133, PETRI_PLACES=120, PETRI_TRANSITIONS=318} [2023-08-26 18:32:14,845 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 35 predicate places. [2023-08-26 18:32:14,846 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 318 transitions, 6133 flow [2023-08-26 18:32:14,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 114.41666666666667) internal successors, (1373), 12 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:14,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:14,846 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 18:32:14,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 18:32:14,847 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:32:14,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1827581409, now seen corresponding path program 1 times [2023-08-26 18:32:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:14,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677121012] [2023-08-26 18:32:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:15,142 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 18:32:15,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:15,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677121012] [2023-08-26 18:32:15,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677121012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:15,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:15,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 18:32:15,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863563500] [2023-08-26 18:32:15,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:15,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 18:32:15,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 18:32:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-08-26 18:32:15,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 358 [2023-08-26 18:32:15,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 318 transitions, 6133 flow. Second operand has 10 states, 10 states have (on average 116.7) internal successors, (1167), 10 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:15,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:15,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 358 [2023-08-26 18:32:15,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:32:31,393 INFO L124 PetriNetUnfolderBase]: 64625/95299 cut-off events. [2023-08-26 18:32:31,393 INFO L125 PetriNetUnfolderBase]: For 816840/817445 co-relation queries the response was YES. [2023-08-26 18:32:32,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451460 conditions, 95299 events. 64625/95299 cut-off events. For 816840/817445 co-relation queries the response was YES. Maximal size of possible extension queue 5347. Compared 790723 event pairs, 17604 based on Foata normal form. 470/95527 useless extension candidates. Maximal degree in co-relation 451425. Up to 26751 conditions per place. [2023-08-26 18:32:32,528 INFO L140 encePairwiseOnDemand]: 342/358 looper letters, 301 selfloop transitions, 296 changer transitions 3/604 dead transitions. [2023-08-26 18:32:32,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 604 transitions, 11578 flow [2023-08-26 18:32:32,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:32:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:32:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1156 transitions. [2023-08-26 18:32:32,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35878336436995656 [2023-08-26 18:32:32,531 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1156 transitions. [2023-08-26 18:32:32,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1156 transitions. [2023-08-26 18:32:32,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:32:32,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1156 transitions. [2023-08-26 18:32:32,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.44444444444446) internal successors, (1156), 9 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:32,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 358.0) internal successors, (3580), 10 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:32,536 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 358.0) internal successors, (3580), 10 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:32,536 INFO L175 Difference]: Start difference. First operand has 120 places, 318 transitions, 6133 flow. Second operand 9 states and 1156 transitions. [2023-08-26 18:32:32,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 604 transitions, 11578 flow [2023-08-26 18:32:41,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 604 transitions, 11425 flow, removed 54 selfloop flow, removed 3 redundant places. [2023-08-26 18:32:41,594 INFO L231 Difference]: Finished difference. Result has 129 places, 449 transitions, 9960 flow [2023-08-26 18:32:41,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=6049, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9960, PETRI_PLACES=129, PETRI_TRANSITIONS=449} [2023-08-26 18:32:41,595 INFO L281 CegarLoopForPetriNet]: 85 programPoint places, 44 predicate places. [2023-08-26 18:32:41,595 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 449 transitions, 9960 flow [2023-08-26 18:32:41,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.7) internal successors, (1167), 10 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:41,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:32:41,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:32:41,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:32:41,595 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P2Err0ASSERT_VIOLATIONASSERT, P2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2023-08-26 18:32:41,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:32:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1005584006, now seen corresponding path program 1 times [2023-08-26 18:32:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:32:41,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114131062] [2023-08-26 18:32:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:32:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:32:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:32:41,981 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 18:32:41,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:32:41,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114131062] [2023-08-26 18:32:41,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114131062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:32:41,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:32:41,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 18:32:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421457776] [2023-08-26 18:32:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:32:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 18:32:41,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:32:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 18:32:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-26 18:32:41,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 358 [2023-08-26 18:32:41,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 449 transitions, 9960 flow. Second operand has 11 states, 11 states have (on average 113.63636363636364) internal successors, (1250), 11 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:32:41,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:32:41,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 358 [2023-08-26 18:32:41,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand