/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/test-easy10.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:51:38,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:51:38,295 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 13:51:38,298 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:51:38,298 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:51:38,312 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:51:38,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:51:38,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:51:38,313 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:51:38,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:51:38,314 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:51:38,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:51:38,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:51:38,315 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:51:38,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:51:38,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:51:38,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:51:38,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:51:38,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:51:38,316 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:51:38,316 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:51:38,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:51:38,317 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:51:38,317 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:51:38,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:51:38,318 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:51:38,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:51:38,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:51:38,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:51:38,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:51:38,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:51:38,319 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:51:38,319 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:51:38,320 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:51:38,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:51:38,320 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:51:38,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:51:38,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:51:38,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:51:38,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:51:38,541 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:51:38,544 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy10.wvr.c [2023-08-26 13:51:39,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:51:39,635 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:51:39,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy10.wvr.c [2023-08-26 13:51:39,641 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/103d0777a/bf2ab9d81f3b4dcc9d39fa4b9687f0af/FLAGd99f82033 [2023-08-26 13:51:39,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/103d0777a/bf2ab9d81f3b4dcc9d39fa4b9687f0af [2023-08-26 13:51:39,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:51:39,651 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:51:39,652 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:51:39,652 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:51:39,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:51:39,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533f29a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39, skipping insertion in model container [2023-08-26 13:51:39,657 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,683 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:51:39,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:51:39,828 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:51:39,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:51:39,860 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:51:39,860 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:51:39,864 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:51:39,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39 WrapperNode [2023-08-26 13:51:39,866 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:51:39,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:51:39,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:51:39,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:51:39,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,884 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,910 INFO L138 Inliner]: procedures = 23, calls = 85, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 194 [2023-08-26 13:51:39,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:51:39,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:51:39,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:51:39,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:51:39,917 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,917 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,938 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,940 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,941 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:51:39,941 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:51:39,941 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:51:39,942 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:51:39,942 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (1/1) ... [2023-08-26 13:51:39,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:51:39,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:51:39,969 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 13:51:39,991 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 13:51:40,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:51:40,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:51:40,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:51:40,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:51:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:51:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 13:51:40,001 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:51:40,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:51:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:51:40,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:51:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:51:40,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:51:40,004 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 13:51:40,082 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:51:40,083 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:51:40,311 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:51:40,353 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:51:40,353 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:51:40,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:51:40 BoogieIcfgContainer [2023-08-26 13:51:40,355 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:51:40,366 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:51:40,366 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:51:40,368 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:51:40,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:51:39" (1/3) ... [2023-08-26 13:51:40,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d00fd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:51:40, skipping insertion in model container [2023-08-26 13:51:40,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:51:39" (2/3) ... [2023-08-26 13:51:40,369 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d00fd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:51:40, skipping insertion in model container [2023-08-26 13:51:40,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:51:40" (3/3) ... [2023-08-26 13:51:40,370 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy10.wvr.c [2023-08-26 13:51:40,381 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:51:40,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 13:51:40,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:51:40,476 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 13:51:40,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 152 transitions, 336 flow [2023-08-26 13:51:40,587 INFO L124 PetriNetUnfolderBase]: 2/148 cut-off events. [2023-08-26 13:51:40,587 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:51:40,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 148 events. 2/148 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 133 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-08-26 13:51:40,590 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 152 transitions, 336 flow [2023-08-26 13:51:40,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 135 transitions, 294 flow [2023-08-26 13:51:40,598 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:51:40,608 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 135 transitions, 294 flow [2023-08-26 13:51:40,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 135 transitions, 294 flow [2023-08-26 13:51:40,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 135 transitions, 294 flow [2023-08-26 13:51:40,644 INFO L124 PetriNetUnfolderBase]: 2/135 cut-off events. [2023-08-26 13:51:40,645 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:51:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 135 events. 2/135 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-08-26 13:51:40,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 2336 [2023-08-26 13:51:44,653 INFO L134 LiptonReduction]: Checked pairs total: 14665 [2023-08-26 13:51:44,653 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-26 13:51:44,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:51:44,670 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;@5359cc3b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:51:44,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 13:51:44,672 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:51:44,672 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 13:51:44,672 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:44,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:44,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:51:44,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:44,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 553, now seen corresponding path program 1 times [2023-08-26 13:51:44,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:44,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069601766] [2023-08-26 13:51:44,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:44,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:44,737 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 13:51:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:44,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069601766] [2023-08-26 13:51:44,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069601766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:44,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:44,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:51:44,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409334750] [2023-08-26 13:51:44,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:51:44,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:44,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:51:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:51:44,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 262 [2023-08-26 13:51:44,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 57 transitions, 138 flow. Second operand has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:44,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:44,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 262 [2023-08-26 13:51:44,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:44,979 INFO L124 PetriNetUnfolderBase]: 1328/2127 cut-off events. [2023-08-26 13:51:44,979 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 13:51:44,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 2127 events. 1328/2127 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13568 event pairs, 1328 based on Foata normal form. 0/1520 useless extension candidates. Maximal degree in co-relation 3308. Up to 1968 conditions per place. [2023-08-26 13:51:44,995 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 39 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-08-26 13:51:44,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 212 flow [2023-08-26 13:51:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:51:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:51:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 315 transitions. [2023-08-26 13:51:45,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601145038167939 [2023-08-26 13:51:45,010 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 315 transitions. [2023-08-26 13:51:45,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 315 transitions. [2023-08-26 13:51:45,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:45,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 315 transitions. [2023-08-26 13:51:45,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 157.5) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,021 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,022 INFO L175 Difference]: Start difference. First operand has 70 places, 57 transitions, 138 flow. Second operand 2 states and 315 transitions. [2023-08-26 13:51:45,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 212 flow [2023-08-26 13:51:45,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 13:51:45,030 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 118 flow [2023-08-26 13:51:45,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-26 13:51:45,034 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 13:51:45,034 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 118 flow [2023-08-26 13:51:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 137.5) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:45,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:51:45,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:51:45,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:45,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash 546510, now seen corresponding path program 1 times [2023-08-26 13:51:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:45,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75419472] [2023-08-26 13:51:45,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:45,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:45,357 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 13:51:45,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:45,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75419472] [2023-08-26 13:51:45,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75419472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:45,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:45,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:45,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509795200] [2023-08-26 13:51:45,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:45,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:45,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:45,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 13:51:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:45,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 13:51:45,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:45,504 INFO L124 PetriNetUnfolderBase]: 1272/2041 cut-off events. [2023-08-26 13:51:45,505 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:45,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3965 conditions, 2041 events. 1272/2041 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12979 event pairs, 1272 based on Foata normal form. 0/1466 useless extension candidates. Maximal degree in co-relation 3962. Up to 1881 conditions per place. [2023-08-26 13:51:45,513 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 36 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-26 13:51:45,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 188 flow [2023-08-26 13:51:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:45,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 13:51:45,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541984732824427 [2023-08-26 13:51:45,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 13:51:45,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 13:51:45,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:45,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 13:51:45,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,518 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 118 flow. Second operand 3 states and 357 transitions. [2023-08-26 13:51:45,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 188 flow [2023-08-26 13:51:45,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:51:45,519 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 116 flow [2023-08-26 13:51:45,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-08-26 13:51:45,520 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 13:51:45,520 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 116 flow [2023-08-26 13:51:45,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:45,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:51:45,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:51:45,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:45,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:45,521 INFO L85 PathProgramCache]: Analyzing trace with hash 546511, now seen corresponding path program 1 times [2023-08-26 13:51:45,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:45,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075051064] [2023-08-26 13:51:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:45,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:51:45,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075051064] [2023-08-26 13:51:45,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075051064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:45,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668082472] [2023-08-26 13:51:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:45,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 13:51:45,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:45,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 13:51:45,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:45,719 INFO L124 PetriNetUnfolderBase]: 1216/1955 cut-off events. [2023-08-26 13:51:45,719 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:45,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 1955 events. 1216/1955 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12321 event pairs, 1216 based on Foata normal form. 0/1412 useless extension candidates. Maximal degree in co-relation 3791. Up to 1795 conditions per place. [2023-08-26 13:51:45,730 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 34 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 13:51:45,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 182 flow [2023-08-26 13:51:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-26 13:51:45,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669211195928753 [2023-08-26 13:51:45,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-26 13:51:45,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-26 13:51:45,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:45,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-26 13:51:45,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,734 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 116 flow. Second operand 3 states and 367 transitions. [2023-08-26 13:51:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 182 flow [2023-08-26 13:51:45,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 51 transitions, 181 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:45,736 INFO L231 Difference]: Finished difference. Result has 60 places, 51 transitions, 113 flow [2023-08-26 13:51:45,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=111, 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=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=60, PETRI_TRANSITIONS=51} [2023-08-26 13:51:45,737 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-26 13:51:45,737 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 51 transitions, 113 flow [2023-08-26 13:51:45,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:45,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:51:45,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:51:45,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:45,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:45,741 INFO L85 PathProgramCache]: Analyzing trace with hash 525208169, now seen corresponding path program 1 times [2023-08-26 13:51:45,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:45,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563958794] [2023-08-26 13:51:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:45,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:45,804 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 13:51:45,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:45,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563958794] [2023-08-26 13:51:45,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563958794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:45,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:45,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:45,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886268967] [2023-08-26 13:51:45,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:45,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:45,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:45,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:45,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:45,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 13:51:45,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 51 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:45,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 13:51:45,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:45,968 INFO L124 PetriNetUnfolderBase]: 1192/1913 cut-off events. [2023-08-26 13:51:45,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:45,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3712 conditions, 1913 events. 1192/1913 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12078 event pairs, 1192 based on Foata normal form. 0/1394 useless extension candidates. Maximal degree in co-relation 3708. Up to 1753 conditions per place. [2023-08-26 13:51:45,976 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 32 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 13:51:45,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 175 flow [2023-08-26 13:51:45,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-26 13:51:45,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643765903307888 [2023-08-26 13:51:45,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-26 13:51:45,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-26 13:51:45,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:45,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-26 13:51:45,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,980 INFO L175 Difference]: Start difference. First operand has 60 places, 51 transitions, 113 flow. Second operand 3 states and 365 transitions. [2023-08-26 13:51:45,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 175 flow [2023-08-26 13:51:45,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 49 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:45,981 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 110 flow [2023-08-26 13:51:45,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-26 13:51:45,982 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -11 predicate places. [2023-08-26 13:51:45,982 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 110 flow [2023-08-26 13:51:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:45,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:45,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:51:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:51:45,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:45,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 525208171, now seen corresponding path program 1 times [2023-08-26 13:51:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:45,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993991127] [2023-08-26 13:51:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:46,028 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 13:51:46,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:46,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993991127] [2023-08-26 13:51:46,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993991127] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:46,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:46,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:46,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829218818] [2023-08-26 13:51:46,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:46,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:46,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 13:51:46,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:46,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 13:51:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:46,149 INFO L124 PetriNetUnfolderBase]: 1168/1871 cut-off events. [2023-08-26 13:51:46,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:46,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3629 conditions, 1871 events. 1168/1871 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 11682 event pairs, 1168 based on Foata normal form. 0/1376 useless extension candidates. Maximal degree in co-relation 3625. Up to 1711 conditions per place. [2023-08-26 13:51:46,158 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 30 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-26 13:51:46,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 168 flow [2023-08-26 13:51:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-26 13:51:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44656488549618323 [2023-08-26 13:51:46,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-26 13:51:46,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-26 13:51:46,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:46,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-26 13:51:46,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,162 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,162 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 110 flow. Second operand 3 states and 351 transitions. [2023-08-26 13:51:46,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 168 flow [2023-08-26 13:51:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:46,164 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 107 flow [2023-08-26 13:51:46,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-08-26 13:51:46,166 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 13:51:46,166 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 107 flow [2023-08-26 13:51:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:46,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:46,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:51:46,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:46,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:46,167 INFO L85 PathProgramCache]: Analyzing trace with hash -2081076345, now seen corresponding path program 1 times [2023-08-26 13:51:46,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:46,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069160751] [2023-08-26 13:51:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:46,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:46,205 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 13:51:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069160751] [2023-08-26 13:51:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069160751] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:46,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:46,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457793497] [2023-08-26 13:51:46,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:46,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:46,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:46,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:46,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:46,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 262 [2023-08-26 13:51:46,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:46,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 262 [2023-08-26 13:51:46,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:46,316 INFO L124 PetriNetUnfolderBase]: 1112/1785 cut-off events. [2023-08-26 13:51:46,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:46,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3458 conditions, 1785 events. 1112/1785 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11124 event pairs, 1112 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 3454. Up to 1625 conditions per place. [2023-08-26 13:51:46,326 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 28 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 13:51:46,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 161 flow [2023-08-26 13:51:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-26 13:51:46,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440203562340967 [2023-08-26 13:51:46,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-26 13:51:46,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-26 13:51:46,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:46,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-26 13:51:46,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,330 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 107 flow. Second operand 3 states and 349 transitions. [2023-08-26 13:51:46,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 161 flow [2023-08-26 13:51:46,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:46,332 INFO L231 Difference]: Finished difference. Result has 57 places, 45 transitions, 104 flow [2023-08-26 13:51:46,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=57, PETRI_TRANSITIONS=45} [2023-08-26 13:51:46,334 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -13 predicate places. [2023-08-26 13:51:46,334 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 45 transitions, 104 flow [2023-08-26 13:51:46,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:46,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:51:46,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:46,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2081076344, now seen corresponding path program 1 times [2023-08-26 13:51:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:46,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832976787] [2023-08-26 13:51:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:46,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:46,391 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 13:51:46,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:46,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832976787] [2023-08-26 13:51:46,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832976787] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:46,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:46,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880232831] [2023-08-26 13:51:46,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:46,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:46,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 13:51:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 45 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 13:51:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:46,538 INFO L124 PetriNetUnfolderBase]: 1056/1699 cut-off events. [2023-08-26 13:51:46,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:46,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3287 conditions, 1699 events. 1056/1699 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10478 event pairs, 1056 based on Foata normal form. 0/1300 useless extension candidates. Maximal degree in co-relation 3283. Up to 1539 conditions per place. [2023-08-26 13:51:46,546 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 26 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 13:51:46,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 154 flow [2023-08-26 13:51:46,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-26 13:51:46,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45674300254452926 [2023-08-26 13:51:46,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-26 13:51:46,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-26 13:51:46,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:46,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-26 13:51:46,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,552 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,552 INFO L175 Difference]: Start difference. First operand has 57 places, 45 transitions, 104 flow. Second operand 3 states and 359 transitions. [2023-08-26 13:51:46,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 154 flow [2023-08-26 13:51:46,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 43 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:46,553 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 101 flow [2023-08-26 13:51:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2023-08-26 13:51:46,555 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 13:51:46,555 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 101 flow [2023-08-26 13:51:46,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:46,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:46,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:51:46,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:46,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1540407371, now seen corresponding path program 1 times [2023-08-26 13:51:46,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:46,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476669091] [2023-08-26 13:51:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:46,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:46,588 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 13:51:46,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:46,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476669091] [2023-08-26 13:51:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476669091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:46,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:46,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:51:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947185856] [2023-08-26 13:51:46,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:46,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:46,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:46,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 262 [2023-08-26 13:51:46,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:46,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 262 [2023-08-26 13:51:46,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:46,685 INFO L124 PetriNetUnfolderBase]: 840/1402 cut-off events. [2023-08-26 13:51:46,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:46,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2694 conditions, 1402 events. 840/1402 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8592 event pairs, 840 based on Foata normal form. 0/1147 useless extension candidates. Maximal degree in co-relation 2690. Up to 1242 conditions per place. [2023-08-26 13:51:46,691 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 25 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 13:51:46,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 151 flow [2023-08-26 13:51:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 13:51:46,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541984732824427 [2023-08-26 13:51:46,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 13:51:46,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 13:51:46,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:46,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 13:51:46,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,694 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,694 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 101 flow. Second operand 3 states and 357 transitions. [2023-08-26 13:51:46,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 151 flow [2023-08-26 13:51:46,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 42 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:46,695 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 100 flow [2023-08-26 13:51:46,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-26 13:51:46,696 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 13:51:46,696 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 100 flow [2023-08-26 13:51:46,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:46,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:46,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:51:46,697 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:46,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:46,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1540407373, now seen corresponding path program 1 times [2023-08-26 13:51:46,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:46,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509928334] [2023-08-26 13:51:46,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:46,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:46,836 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 13:51:46,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:46,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509928334] [2023-08-26 13:51:46,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509928334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:46,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:46,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:51:46,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791714755] [2023-08-26 13:51:46,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:51:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:51:46,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:51:46,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 262 [2023-08-26 13:51:46,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:46,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 262 [2023-08-26 13:51:46,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:46,919 INFO L124 PetriNetUnfolderBase]: 624/1105 cut-off events. [2023-08-26 13:51:46,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:51:46,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2101 conditions, 1105 events. 624/1105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6665 event pairs, 624 based on Foata normal form. 0/994 useless extension candidates. Maximal degree in co-relation 2097. Up to 945 conditions per place. [2023-08-26 13:51:46,928 INFO L140 encePairwiseOnDemand]: 260/262 looper letters, 24 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 13:51:46,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 41 transitions, 148 flow [2023-08-26 13:51:46,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:46,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-08-26 13:51:46,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033078880407125 [2023-08-26 13:51:46,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-08-26 13:51:46,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-08-26 13:51:46,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:46,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-08-26 13:51:46,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,931 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 100 flow. Second operand 3 states and 317 transitions. [2023-08-26 13:51:46,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 41 transitions, 148 flow [2023-08-26 13:51:46,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:46,935 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 99 flow [2023-08-26 13:51:46,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-26 13:51:46,935 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -14 predicate places. [2023-08-26 13:51:46,935 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 99 flow [2023-08-26 13:51:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 98.5) internal successors, (591), 6 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:46,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:46,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:46,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:51:46,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:46,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 353494060, now seen corresponding path program 1 times [2023-08-26 13:51:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:46,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140635366] [2023-08-26 13:51:46,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:46,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:47,129 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 13:51:47,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:47,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140635366] [2023-08-26 13:51:47,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140635366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:47,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:51:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852334332] [2023-08-26 13:51:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:47,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 13:51:47,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:47,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 13:51:47,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:47,219 INFO L124 PetriNetUnfolderBase]: 585/1061 cut-off events. [2023-08-26 13:51:47,219 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-26 13:51:47,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1991 conditions, 1061 events. 585/1061 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5709 event pairs, 180 based on Foata normal form. 17/1057 useless extension candidates. Maximal degree in co-relation 1987. Up to 756 conditions per place. [2023-08-26 13:51:47,223 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 33 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-26 13:51:47,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 189 flow [2023-08-26 13:51:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-26 13:51:47,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610687022900763 [2023-08-26 13:51:47,225 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:47,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:51:47,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,227 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 99 flow. Second operand 3 states and 441 transitions. [2023-08-26 13:51:47,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 189 flow [2023-08-26 13:51:47,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 50 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:51:47,228 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 106 flow [2023-08-26 13:51:47,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-26 13:51:47,229 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 13:51:47,229 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 106 flow [2023-08-26 13:51:47,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:47,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:51:47,230 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:47,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:47,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1385908800, now seen corresponding path program 2 times [2023-08-26 13:51:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:47,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791465027] [2023-08-26 13:51:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:47,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:47,433 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 13:51:47,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:47,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791465027] [2023-08-26 13:51:47,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791465027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:47,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:47,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:51:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268677111] [2023-08-26 13:51:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:47,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 13:51:47,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:47,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 13:51:47,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:47,519 INFO L124 PetriNetUnfolderBase]: 627/1121 cut-off events. [2023-08-26 13:51:47,519 INFO L125 PetriNetUnfolderBase]: For 97/118 co-relation queries the response was YES. [2023-08-26 13:51:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2218 conditions, 1121 events. 627/1121 cut-off events. For 97/118 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6081 event pairs, 180 based on Foata normal form. 23/1088 useless extension candidates. Maximal degree in co-relation 2213. Up to 816 conditions per place. [2023-08-26 13:51:47,523 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 35 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 13:51:47,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 205 flow [2023-08-26 13:51:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 13:51:47,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636132315521628 [2023-08-26 13:51:47,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 13:51:47,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 13:51:47,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:47,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 13:51:47,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:51:47,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,527 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 106 flow. Second operand 3 states and 443 transitions. [2023-08-26 13:51:47,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 205 flow [2023-08-26 13:51:47,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 52 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:51:47,528 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 110 flow [2023-08-26 13:51:47,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-26 13:51:47,529 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -11 predicate places. [2023-08-26 13:51:47,529 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 110 flow [2023-08-26 13:51:47,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:47,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:47,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:51:47,529 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:47,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2120873262, now seen corresponding path program 3 times [2023-08-26 13:51:47,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:47,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77100716] [2023-08-26 13:51:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:47,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:47,665 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 13:51:47,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:47,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77100716] [2023-08-26 13:51:47,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77100716] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:47,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:47,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:51:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724440707] [2023-08-26 13:51:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:47,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:47,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:47,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:47,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 13:51:47,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:47,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 13:51:47,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:47,745 INFO L124 PetriNetUnfolderBase]: 573/989 cut-off events. [2023-08-26 13:51:47,746 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2023-08-26 13:51:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 989 events. 573/989 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5189 event pairs, 440 based on Foata normal form. 22/999 useless extension candidates. Maximal degree in co-relation 2069. Up to 836 conditions per place. [2023-08-26 13:51:47,749 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 33 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-26 13:51:47,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 204 flow [2023-08-26 13:51:47,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:47,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-26 13:51:47,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610687022900763 [2023-08-26 13:51:47,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:47,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-26 13:51:47,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:51:47,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,753 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 110 flow. Second operand 3 states and 441 transitions. [2023-08-26 13:51:47,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 204 flow [2023-08-26 13:51:47,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:51:47,754 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 114 flow [2023-08-26 13:51:47,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2023-08-26 13:51:47,754 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -10 predicate places. [2023-08-26 13:51:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 114 flow [2023-08-26 13:51:47,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:47,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:51:47,755 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:47,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:47,755 INFO L85 PathProgramCache]: Analyzing trace with hash -399641440, now seen corresponding path program 4 times [2023-08-26 13:51:47,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:47,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150900698] [2023-08-26 13:51:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:47,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:47,929 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 13:51:47,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:47,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150900698] [2023-08-26 13:51:47,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150900698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:47,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:51:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927836086] [2023-08-26 13:51:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:47,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:51:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:51:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:51:47,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 262 [2023-08-26 13:51:47,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:47,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:47,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 262 [2023-08-26 13:51:47,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:48,007 INFO L124 PetriNetUnfolderBase]: 575/985 cut-off events. [2023-08-26 13:51:48,008 INFO L125 PetriNetUnfolderBase]: For 233/236 co-relation queries the response was YES. [2023-08-26 13:51:48,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2144 conditions, 985 events. 575/985 cut-off events. For 233/236 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5160 event pairs, 140 based on Foata normal form. 21/978 useless extension candidates. Maximal degree in co-relation 2137. Up to 840 conditions per place. [2023-08-26 13:51:48,012 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 35 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 13:51:48,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 217 flow [2023-08-26 13:51:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:51:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:51:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 13:51:48,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636132315521628 [2023-08-26 13:51:48,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 13:51:48,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 13:51:48,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:48,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 13:51:48,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 13:51:48,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:48,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:48,015 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 114 flow. Second operand 3 states and 443 transitions. [2023-08-26 13:51:48,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 217 flow [2023-08-26 13:51:48,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 213 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:51:48,016 INFO L231 Difference]: Finished difference. Result has 61 places, 41 transitions, 118 flow [2023-08-26 13:51:48,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=61, PETRI_TRANSITIONS=41} [2023-08-26 13:51:48,017 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -9 predicate places. [2023-08-26 13:51:48,017 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 41 transitions, 118 flow [2023-08-26 13:51:48,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:48,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:48,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:48,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:51:48,017 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:48,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:48,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1219849210, now seen corresponding path program 5 times [2023-08-26 13:51:48,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:48,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46878945] [2023-08-26 13:51:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:48,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:49,332 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 13:51:49,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:49,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46878945] [2023-08-26 13:51:49,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46878945] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:49,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:49,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:51:49,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390775227] [2023-08-26 13:51:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:51:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:51:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:51:49,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:51:49,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 41 transitions, 118 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:49,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:49,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:51:49,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:51,128 INFO L124 PetriNetUnfolderBase]: 6056/9054 cut-off events. [2023-08-26 13:51:51,128 INFO L125 PetriNetUnfolderBase]: For 1871/1871 co-relation queries the response was YES. [2023-08-26 13:51:51,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19919 conditions, 9054 events. 6056/9054 cut-off events. For 1871/1871 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 47459 event pairs, 1475 based on Foata normal form. 1/9053 useless extension candidates. Maximal degree in co-relation 19911. Up to 2954 conditions per place. [2023-08-26 13:51:51,158 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 189 selfloop transitions, 13 changer transitions 14/220 dead transitions. [2023-08-26 13:51:51,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 220 transitions, 987 flow [2023-08-26 13:51:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:51:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:51:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1715 transitions. [2023-08-26 13:51:51,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675572519083969 [2023-08-26 13:51:51,162 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1715 transitions. [2023-08-26 13:51:51,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1715 transitions. [2023-08-26 13:51:51,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:51,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1715 transitions. [2023-08-26 13:51:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 122.5) internal successors, (1715), 14 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:51,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:51,169 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:51,169 INFO L175 Difference]: Start difference. First operand has 61 places, 41 transitions, 118 flow. Second operand 14 states and 1715 transitions. [2023-08-26 13:51:51,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 220 transitions, 987 flow [2023-08-26 13:51:51,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 220 transitions, 983 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:51:51,171 INFO L231 Difference]: Finished difference. Result has 84 places, 53 transitions, 219 flow [2023-08-26 13:51:51,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=219, PETRI_PLACES=84, PETRI_TRANSITIONS=53} [2023-08-26 13:51:51,172 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 14 predicate places. [2023-08-26 13:51:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 53 transitions, 219 flow [2023-08-26 13:51:51,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:51,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:51,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:51:51,173 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:51,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:51,173 INFO L85 PathProgramCache]: Analyzing trace with hash 758869730, now seen corresponding path program 6 times [2023-08-26 13:51:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558401129] [2023-08-26 13:51:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:51,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:52,478 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 13:51:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:52,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558401129] [2023-08-26 13:51:52,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558401129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:52,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:52,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:51:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204359473] [2023-08-26 13:51:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:51:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:51:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:51:52,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:51:52,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 53 transitions, 219 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:52,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:52,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:51:52,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:51:55,595 INFO L124 PetriNetUnfolderBase]: 16045/24091 cut-off events. [2023-08-26 13:51:55,595 INFO L125 PetriNetUnfolderBase]: For 25646/25646 co-relation queries the response was YES. [2023-08-26 13:51:55,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72252 conditions, 24091 events. 16045/24091 cut-off events. For 25646/25646 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 154192 event pairs, 2645 based on Foata normal form. 1/24092 useless extension candidates. Maximal degree in co-relation 72232. Up to 6072 conditions per place. [2023-08-26 13:51:55,718 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 261 selfloop transitions, 25 changer transitions 9/299 dead transitions. [2023-08-26 13:51:55,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 299 transitions, 1785 flow [2023-08-26 13:51:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:51:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:51:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1730 transitions. [2023-08-26 13:51:55,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47164667393675025 [2023-08-26 13:51:55,722 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1730 transitions. [2023-08-26 13:51:55,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1730 transitions. [2023-08-26 13:51:55,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:51:55,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1730 transitions. [2023-08-26 13:51:55,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.57142857142857) internal successors, (1730), 14 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:55,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:55,728 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:55,729 INFO L175 Difference]: Start difference. First operand has 84 places, 53 transitions, 219 flow. Second operand 14 states and 1730 transitions. [2023-08-26 13:51:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 299 transitions, 1785 flow [2023-08-26 13:51:56,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 299 transitions, 1745 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-26 13:51:56,013 INFO L231 Difference]: Finished difference. Result has 104 places, 76 transitions, 480 flow [2023-08-26 13:51:56,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=480, PETRI_PLACES=104, PETRI_TRANSITIONS=76} [2023-08-26 13:51:56,014 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2023-08-26 13:51:56,014 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 76 transitions, 480 flow [2023-08-26 13:51:56,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:56,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:51:56,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:51:56,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:51:56,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:51:56,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:51:56,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2044401006, now seen corresponding path program 7 times [2023-08-26 13:51:56,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:51:56,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609159210] [2023-08-26 13:51:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:51:56,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:51:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:51:57,206 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 13:51:57,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:51:57,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609159210] [2023-08-26 13:51:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609159210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:51:57,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:51:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:51:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383993750] [2023-08-26 13:51:57,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:51:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:51:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:51:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:51:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:51:57,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:51:57,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 76 transitions, 480 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:51:57,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:51:57,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:51:57,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:52:01,254 INFO L124 PetriNetUnfolderBase]: 22687/35279 cut-off events. [2023-08-26 13:52:01,255 INFO L125 PetriNetUnfolderBase]: For 89703/89703 co-relation queries the response was YES. [2023-08-26 13:52:01,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127769 conditions, 35279 events. 22687/35279 cut-off events. For 89703/89703 co-relation queries the response was YES. Maximal size of possible extension queue 1195. Compared 252551 event pairs, 4699 based on Foata normal form. 1/35280 useless extension candidates. Maximal degree in co-relation 127739. Up to 9947 conditions per place. [2023-08-26 13:52:01,508 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 273 selfloop transitions, 38 changer transitions 9/324 dead transitions. [2023-08-26 13:52:01,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 324 transitions, 2440 flow [2023-08-26 13:52:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:52:01,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:52:01,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1726 transitions. [2023-08-26 13:52:01,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47055616139585604 [2023-08-26 13:52:01,511 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1726 transitions. [2023-08-26 13:52:01,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1726 transitions. [2023-08-26 13:52:01,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:52:01,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1726 transitions. [2023-08-26 13:52:01,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.28571428571429) internal successors, (1726), 14 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:01,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:01,518 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:01,518 INFO L175 Difference]: Start difference. First operand has 104 places, 76 transitions, 480 flow. Second operand 14 states and 1726 transitions. [2023-08-26 13:52:01,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 324 transitions, 2440 flow [2023-08-26 13:52:02,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 324 transitions, 2383 flow, removed 24 selfloop flow, removed 2 redundant places. [2023-08-26 13:52:02,196 INFO L231 Difference]: Finished difference. Result has 126 places, 103 transitions, 886 flow [2023-08-26 13:52:02,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=886, PETRI_PLACES=126, PETRI_TRANSITIONS=103} [2023-08-26 13:52:02,196 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 56 predicate places. [2023-08-26 13:52:02,196 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 103 transitions, 886 flow [2023-08-26 13:52:02,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:02,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:52:02,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:52:02,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 13:52:02,197 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:52:02,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:52:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1983578792, now seen corresponding path program 8 times [2023-08-26 13:52:02,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:52:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401250129] [2023-08-26 13:52:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:52:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:52:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:52:03,393 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 13:52:03,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:52:03,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401250129] [2023-08-26 13:52:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401250129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:52:03,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:52:03,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:52:03,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032011510] [2023-08-26 13:52:03,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:52:03,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:52:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:52:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:52:03,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:52:03,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:52:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 103 transitions, 886 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:03,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:52:03,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:52:03,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:52:10,212 INFO L124 PetriNetUnfolderBase]: 34000/53980 cut-off events. [2023-08-26 13:52:10,212 INFO L125 PetriNetUnfolderBase]: For 258252/258252 co-relation queries the response was YES. [2023-08-26 13:52:10,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230632 conditions, 53980 events. 34000/53980 cut-off events. For 258252/258252 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 426836 event pairs, 7701 based on Foata normal form. 1/53973 useless extension candidates. Maximal degree in co-relation 230591. Up to 16103 conditions per place. [2023-08-26 13:52:11,080 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 327 selfloop transitions, 59 changer transitions 9/399 dead transitions. [2023-08-26 13:52:11,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 399 transitions, 3701 flow [2023-08-26 13:52:11,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:52:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:52:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1733 transitions. [2023-08-26 13:52:11,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47246455834242096 [2023-08-26 13:52:11,084 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1733 transitions. [2023-08-26 13:52:11,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1733 transitions. [2023-08-26 13:52:11,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:52:11,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1733 transitions. [2023-08-26 13:52:11,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.78571428571429) internal successors, (1733), 14 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:11,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:11,091 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:11,091 INFO L175 Difference]: Start difference. First operand has 126 places, 103 transitions, 886 flow. Second operand 14 states and 1733 transitions. [2023-08-26 13:52:11,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 399 transitions, 3701 flow [2023-08-26 13:52:13,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 399 transitions, 3607 flow, removed 41 selfloop flow, removed 2 redundant places. [2023-08-26 13:52:13,932 INFO L231 Difference]: Finished difference. Result has 148 places, 150 transitions, 1703 flow [2023-08-26 13:52:13,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1703, PETRI_PLACES=148, PETRI_TRANSITIONS=150} [2023-08-26 13:52:13,933 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2023-08-26 13:52:13,933 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 150 transitions, 1703 flow [2023-08-26 13:52:13,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:13,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:52:13,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:52:13,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 13:52:13,934 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:52:13,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:52:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1812170798, now seen corresponding path program 9 times [2023-08-26 13:52:13,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:52:13,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82712789] [2023-08-26 13:52:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:52:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:52:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:52:14,882 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 13:52:14,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:52:14,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82712789] [2023-08-26 13:52:14,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82712789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:52:14,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:52:14,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:52:14,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692447877] [2023-08-26 13:52:14,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:52:14,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:52:14,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:52:14,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:52:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:52:14,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:52:14,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 150 transitions, 1703 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:14,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:52:14,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:52:14,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:52:22,744 INFO L124 PetriNetUnfolderBase]: 38036/61128 cut-off events. [2023-08-26 13:52:22,745 INFO L125 PetriNetUnfolderBase]: For 460525/460525 co-relation queries the response was YES. [2023-08-26 13:52:23,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297322 conditions, 61128 events. 38036/61128 cut-off events. For 460525/460525 co-relation queries the response was YES. Maximal size of possible extension queue 2307. Compared 501223 event pairs, 10089 based on Foata normal form. 1/61129 useless extension candidates. Maximal degree in co-relation 297270. Up to 18017 conditions per place. [2023-08-26 13:52:23,477 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 325 selfloop transitions, 79 changer transitions 11/419 dead transitions. [2023-08-26 13:52:23,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 419 transitions, 4551 flow [2023-08-26 13:52:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:52:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:52:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1732 transitions. [2023-08-26 13:52:23,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721919302071974 [2023-08-26 13:52:23,492 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1732 transitions. [2023-08-26 13:52:23,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1732 transitions. [2023-08-26 13:52:23,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:52:23,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1732 transitions. [2023-08-26 13:52:23,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.71428571428571) internal successors, (1732), 14 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:23,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:23,499 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:23,499 INFO L175 Difference]: Start difference. First operand has 148 places, 150 transitions, 1703 flow. Second operand 14 states and 1732 transitions. [2023-08-26 13:52:23,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 419 transitions, 4551 flow [2023-08-26 13:52:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 419 transitions, 4451 flow, removed 50 selfloop flow, removed 1 redundant places. [2023-08-26 13:52:28,763 INFO L231 Difference]: Finished difference. Result has 171 places, 182 transitions, 2430 flow [2023-08-26 13:52:28,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=1647, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2430, PETRI_PLACES=171, PETRI_TRANSITIONS=182} [2023-08-26 13:52:28,763 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 101 predicate places. [2023-08-26 13:52:28,763 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 182 transitions, 2430 flow [2023-08-26 13:52:28,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:28,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:52:28,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:52:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 13:52:28,764 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:52:28,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:52:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1842155896, now seen corresponding path program 10 times [2023-08-26 13:52:28,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:52:28,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274430506] [2023-08-26 13:52:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:52:28,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:52:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:52:29,755 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 13:52:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:52:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274430506] [2023-08-26 13:52:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274430506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:52:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:52:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:52:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662110068] [2023-08-26 13:52:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:52:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:52:29,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:52:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:52:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:52:29,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:52:29,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 182 transitions, 2430 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:29,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:52:29,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:52:29,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:52:44,848 INFO L124 PetriNetUnfolderBase]: 64588/108468 cut-off events. [2023-08-26 13:52:44,848 INFO L125 PetriNetUnfolderBase]: For 1246009/1246009 co-relation queries the response was YES. [2023-08-26 13:52:46,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591259 conditions, 108468 events. 64588/108468 cut-off events. For 1246009/1246009 co-relation queries the response was YES. Maximal size of possible extension queue 4506. Compared 1032289 event pairs, 16497 based on Foata normal form. 1/108461 useless extension candidates. Maximal degree in co-relation 591195. Up to 29870 conditions per place. [2023-08-26 13:52:46,470 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 630 selfloop transitions, 94 changer transitions 10/738 dead transitions. [2023-08-26 13:52:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 738 transitions, 10895 flow [2023-08-26 13:52:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:52:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:52:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1737 transitions. [2023-08-26 13:52:46,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47355507088331517 [2023-08-26 13:52:46,473 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1737 transitions. [2023-08-26 13:52:46,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1737 transitions. [2023-08-26 13:52:46,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:52:46,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1737 transitions. [2023-08-26 13:52:46,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.07142857142857) internal successors, (1737), 14 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:46,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:46,478 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:52:46,478 INFO L175 Difference]: Start difference. First operand has 171 places, 182 transitions, 2430 flow. Second operand 14 states and 1737 transitions. [2023-08-26 13:52:46,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 738 transitions, 10895 flow [2023-08-26 13:53:11,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 738 transitions, 10598 flow, removed 138 selfloop flow, removed 3 redundant places. [2023-08-26 13:53:11,094 INFO L231 Difference]: Finished difference. Result has 192 places, 250 transitions, 3863 flow [2023-08-26 13:53:11,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=2349, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3863, PETRI_PLACES=192, PETRI_TRANSITIONS=250} [2023-08-26 13:53:11,094 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 122 predicate places. [2023-08-26 13:53:11,095 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 250 transitions, 3863 flow [2023-08-26 13:53:11,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:11,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:53:11,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:53:11,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:53:11,095 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:53:11,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:53:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2074017058, now seen corresponding path program 11 times [2023-08-26 13:53:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:53:11,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559403447] [2023-08-26 13:53:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:53:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:53:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:53:12,069 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 13:53:12,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:53:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559403447] [2023-08-26 13:53:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559403447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:53:12,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:53:12,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:53:12,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166130556] [2023-08-26 13:53:12,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:53:12,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:53:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:53:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:53:12,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:53:12,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:53:12,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 250 transitions, 3863 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:12,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:53:12,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:53:12,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:53:30,152 INFO L124 PetriNetUnfolderBase]: 69303/117879 cut-off events. [2023-08-26 13:53:30,152 INFO L125 PetriNetUnfolderBase]: For 1651973/1651973 co-relation queries the response was YES. [2023-08-26 13:53:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 695377 conditions, 117879 events. 69303/117879 cut-off events. For 1651973/1651973 co-relation queries the response was YES. Maximal size of possible extension queue 4994. Compared 1151178 event pairs, 18787 based on Foata normal form. 1/117880 useless extension candidates. Maximal degree in co-relation 695303. Up to 42695 conditions per place. [2023-08-26 13:53:32,257 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 463 selfloop transitions, 93 changer transitions 11/571 dead transitions. [2023-08-26 13:53:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 571 transitions, 8395 flow [2023-08-26 13:53:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:53:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:53:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1732 transitions. [2023-08-26 13:53:32,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721919302071974 [2023-08-26 13:53:32,261 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1732 transitions. [2023-08-26 13:53:32,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1732 transitions. [2023-08-26 13:53:32,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:53:32,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1732 transitions. [2023-08-26 13:53:32,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 123.71428571428571) internal successors, (1732), 14 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:32,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:32,266 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:32,267 INFO L175 Difference]: Start difference. First operand has 192 places, 250 transitions, 3863 flow. Second operand 14 states and 1732 transitions. [2023-08-26 13:53:32,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 571 transitions, 8395 flow [2023-08-26 13:53:56,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 571 transitions, 7999 flow, removed 188 selfloop flow, removed 2 redundant places. [2023-08-26 13:53:56,453 INFO L231 Difference]: Finished difference. Result has 212 places, 286 transitions, 4692 flow [2023-08-26 13:53:56,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4692, PETRI_PLACES=212, PETRI_TRANSITIONS=286} [2023-08-26 13:53:56,454 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 142 predicate places. [2023-08-26 13:53:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 286 transitions, 4692 flow [2023-08-26 13:53:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:56,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:53:56,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:53:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 13:53:56,455 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:53:56,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:53:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1326301594, now seen corresponding path program 12 times [2023-08-26 13:53:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:53:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707360482] [2023-08-26 13:53:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:53:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:53:56,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:53:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:53:57,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:53:57,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707360482] [2023-08-26 13:53:57,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707360482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:53:57,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:53:57,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:53:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976309037] [2023-08-26 13:53:57,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:53:57,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:53:57,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:53:57,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:53:57,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:53:57,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:53:57,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 286 transitions, 4692 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:53:57,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:53:57,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:53:57,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:54:23,304 INFO L124 PetriNetUnfolderBase]: 82623/145526 cut-off events. [2023-08-26 13:54:23,304 INFO L125 PetriNetUnfolderBase]: For 2416008/2416008 co-relation queries the response was YES. [2023-08-26 13:54:25,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882236 conditions, 145526 events. 82623/145526 cut-off events. For 2416008/2416008 co-relation queries the response was YES. Maximal size of possible extension queue 6548. Compared 1536081 event pairs, 26587 based on Foata normal form. 1/145519 useless extension candidates. Maximal degree in co-relation 882153. Up to 54504 conditions per place. [2023-08-26 13:54:26,146 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 753 selfloop transitions, 138 changer transitions 18/913 dead transitions. [2023-08-26 13:54:26,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 913 transitions, 15874 flow [2023-08-26 13:54:26,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:54:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:54:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1741 transitions. [2023-08-26 13:54:26,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47464558342420937 [2023-08-26 13:54:26,148 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1741 transitions. [2023-08-26 13:54:26,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1741 transitions. [2023-08-26 13:54:26,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:54:26,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1741 transitions. [2023-08-26 13:54:26,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.35714285714286) internal successors, (1741), 14 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:54:26,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:54:26,153 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:54:26,153 INFO L175 Difference]: Start difference. First operand has 212 places, 286 transitions, 4692 flow. Second operand 14 states and 1741 transitions. [2023-08-26 13:54:26,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 913 transitions, 15874 flow [2023-08-26 13:55:14,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 913 transitions, 15372 flow, removed 171 selfloop flow, removed 4 redundant places. [2023-08-26 13:55:14,529 INFO L231 Difference]: Finished difference. Result has 231 places, 375 transitions, 6765 flow [2023-08-26 13:55:14,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=4475, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6765, PETRI_PLACES=231, PETRI_TRANSITIONS=375} [2023-08-26 13:55:14,529 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 161 predicate places. [2023-08-26 13:55:14,529 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 375 transitions, 6765 flow [2023-08-26 13:55:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:14,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:55:14,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:55:14,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 13:55:14,530 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:55:14,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:55:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 629525032, now seen corresponding path program 13 times [2023-08-26 13:55:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:55:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654700002] [2023-08-26 13:55:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:55:14,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:55:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:55:15,344 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 13:55:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:55:15,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654700002] [2023-08-26 13:55:15,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654700002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:55:15,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:55:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:55:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856533549] [2023-08-26 13:55:15,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:55:15,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:55:15,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:55:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:55:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:55:15,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:55:15,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 375 transitions, 6765 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:15,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:55:15,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:55:15,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:55:43,257 INFO L124 PetriNetUnfolderBase]: 82932/147446 cut-off events. [2023-08-26 13:55:43,257 INFO L125 PetriNetUnfolderBase]: For 2773649/2773649 co-relation queries the response was YES. [2023-08-26 13:55:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938744 conditions, 147446 events. 82932/147446 cut-off events. For 2773649/2773649 co-relation queries the response was YES. Maximal size of possible extension queue 6632. Compared 1569418 event pairs, 26811 based on Foata normal form. 1/147447 useless extension candidates. Maximal degree in co-relation 938652. Up to 63030 conditions per place. [2023-08-26 13:55:46,546 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 591 selfloop transitions, 117 changer transitions 13/725 dead transitions. [2023-08-26 13:55:46,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 725 transitions, 12974 flow [2023-08-26 13:55:46,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:55:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:55:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1717 transitions. [2023-08-26 13:55:46,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681025081788441 [2023-08-26 13:55:46,549 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1717 transitions. [2023-08-26 13:55:46,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1717 transitions. [2023-08-26 13:55:46,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:55:46,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1717 transitions. [2023-08-26 13:55:46,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 122.64285714285714) internal successors, (1717), 14 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:46,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:46,554 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:55:46,554 INFO L175 Difference]: Start difference. First operand has 231 places, 375 transitions, 6765 flow. Second operand 14 states and 1717 transitions. [2023-08-26 13:55:46,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 725 transitions, 12974 flow [2023-08-26 13:56:39,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 725 transitions, 12565 flow, removed 167 selfloop flow, removed 4 redundant places. [2023-08-26 13:56:39,604 INFO L231 Difference]: Finished difference. Result has 249 places, 423 transitions, 8091 flow [2023-08-26 13:56:39,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8091, PETRI_PLACES=249, PETRI_TRANSITIONS=423} [2023-08-26 13:56:39,605 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 179 predicate places. [2023-08-26 13:56:39,605 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 423 transitions, 8091 flow [2023-08-26 13:56:39,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:39,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:56:39,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:56:39,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 13:56:39,606 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:56:39,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:56:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash -2067348300, now seen corresponding path program 14 times [2023-08-26 13:56:39,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:56:39,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657604167] [2023-08-26 13:56:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:56:39,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:56:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:56:40,444 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 13:56:40,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:56:40,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657604167] [2023-08-26 13:56:40,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657604167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:56:40,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:56:40,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:56:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574897558] [2023-08-26 13:56:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:56:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:56:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:56:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:56:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:56:40,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:56:40,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 423 transitions, 8091 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:56:40,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:56:40,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:56:40,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:57:17,384 INFO L124 PetriNetUnfolderBase]: 91398/165562 cut-off events. [2023-08-26 13:57:17,385 INFO L125 PetriNetUnfolderBase]: For 3800652/3800652 co-relation queries the response was YES. [2023-08-26 13:57:20,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104762 conditions, 165562 events. 91398/165562 cut-off events. For 3800652/3800652 co-relation queries the response was YES. Maximal size of possible extension queue 7915. Compared 1844724 event pairs, 26327 based on Foata normal form. 1/165555 useless extension candidates. Maximal degree in co-relation 1104661. Up to 57024 conditions per place. [2023-08-26 13:57:21,127 INFO L140 encePairwiseOnDemand]: 249/262 looper letters, 957 selfloop transitions, 140 changer transitions 10/1111 dead transitions. [2023-08-26 13:57:21,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1111 transitions, 22298 flow [2023-08-26 13:57:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:57:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:57:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1736 transitions. [2023-08-26 13:57:21,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732824427480916 [2023-08-26 13:57:21,129 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1736 transitions. [2023-08-26 13:57:21,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1736 transitions. [2023-08-26 13:57:21,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:57:21,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1736 transitions. [2023-08-26 13:57:21,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.0) internal successors, (1736), 14 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:57:21,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:57:21,133 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 262.0) internal successors, (3930), 15 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:57:21,133 INFO L175 Difference]: Start difference. First operand has 249 places, 423 transitions, 8091 flow. Second operand 14 states and 1736 transitions. [2023-08-26 13:57:21,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1111 transitions, 22298 flow [2023-08-26 13:59:24,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1111 transitions, 21513 flow, removed 300 selfloop flow, removed 4 redundant places. [2023-08-26 13:59:24,773 INFO L231 Difference]: Finished difference. Result has 267 places, 519 transitions, 10419 flow [2023-08-26 13:59:24,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=7720, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10419, PETRI_PLACES=267, PETRI_TRANSITIONS=519} [2023-08-26 13:59:24,773 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 197 predicate places. [2023-08-26 13:59:24,773 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 519 transitions, 10419 flow [2023-08-26 13:59:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:59:24,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:59:24,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:59:24,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 13:59:24,774 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:59:24,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:59:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash -181677400, now seen corresponding path program 15 times [2023-08-26 13:59:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:59:24,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894780656] [2023-08-26 13:59:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:59:24,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:59:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:59:25,673 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 13:59:25,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:59:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894780656] [2023-08-26 13:59:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894780656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:59:25,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:59:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 13:59:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204435374] [2023-08-26 13:59:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:59:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 13:59:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:59:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 13:59:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-26 13:59:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 262 [2023-08-26 13:59:25,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 519 transitions, 10419 flow. Second operand has 14 states, 14 states have (on average 109.64285714285714) internal successors, (1535), 14 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:59:25,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:59:25,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 262 [2023-08-26 13:59:25,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand