/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:13:27,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:13:27,636 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:13:27,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:13:27,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:13:27,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:13:27,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:13:27,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:13:27,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:13:27,685 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:13:27,685 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:13:27,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:13:27,685 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:13:27,686 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:13:27,686 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:13:27,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:13:27,686 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:13:27,687 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:13:27,687 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:13:27,687 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:13:27,687 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:13:27,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:13:27,688 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:13:27,689 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:13:27,689 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:13:27,689 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:13:27,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:13:27,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:27,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:13:27,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:13:27,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:13:27,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:13:27,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:13:27,691 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:13:27,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:13:27,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:13:28,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:13:28,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:13:28,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:13:28,048 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:13:28,049 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:13:28,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i [2023-08-26 12:13:29,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:13:29,502 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:13:29,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_power.oepc.i [2023-08-26 12:13:29,531 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e961e3d/9cc7f0c5a5544cceb635d62e284228c4/FLAG680ba78d5 [2023-08-26 12:13:29,546 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67e961e3d/9cc7f0c5a5544cceb635d62e284228c4 [2023-08-26 12:13:29,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:13:29,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:13:29,556 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:29,557 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:13:29,560 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:13:29,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:29" (1/1) ... [2023-08-26 12:13:29,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@633efba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:29, skipping insertion in model container [2023-08-26 12:13:29,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:13:29" (1/1) ... [2023-08-26 12:13:29,610 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:13:29,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:30,003 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:13:30,020 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:13:30,022 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 12:13:30,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:13:30,089 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:30,089 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:13:30,095 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:13:30,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30 WrapperNode [2023-08-26 12:13:30,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:13:30,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:30,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:13:30,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:13:30,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,156 INFO L138 Inliner]: procedures = 177, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 191 [2023-08-26 12:13:30,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:13:30,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:13:30,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:13:30,158 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:13:30,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,198 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:13:30,221 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:13:30,221 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:13:30,221 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:13:30,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (1/1) ... [2023-08-26 12:13:30,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:13:30,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:13:30,262 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:13:30,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:13:30,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 12:13:30,292 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 12:13:30,292 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 12:13:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 12:13:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 12:13:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 12:13:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 12:13:30,293 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 12:13:30,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:13:30,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 12:13:30,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:13:30,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:13:30,296 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:13:30,426 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:13:30,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:13:31,003 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:13:31,701 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:13:31,701 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:13:31,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:31 BoogieIcfgContainer [2023-08-26 12:13:31,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:13:31,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:13:31,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:13:31,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:13:31,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:13:29" (1/3) ... [2023-08-26 12:13:31,708 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c182d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:31, skipping insertion in model container [2023-08-26 12:13:31,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:13:30" (2/3) ... [2023-08-26 12:13:31,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c182d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:13:31, skipping insertion in model container [2023-08-26 12:13:31,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:13:31" (3/3) ... [2023-08-26 12:13:31,710 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_power.oepc.i [2023-08-26 12:13:31,724 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:13:31,724 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 55 error locations. [2023-08-26 12:13:31,724 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:13:31,852 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:13:31,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 200 transitions, 420 flow [2023-08-26 12:13:32,003 INFO L124 PetriNetUnfolderBase]: 3/196 cut-off events. [2023-08-26 12:13:32,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:32,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 3/196 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 345 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2023-08-26 12:13:32,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 200 transitions, 420 flow [2023-08-26 12:13:32,022 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 196 transitions, 404 flow [2023-08-26 12:13:32,025 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:13:32,038 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 196 transitions, 404 flow [2023-08-26 12:13:32,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 196 transitions, 404 flow [2023-08-26 12:13:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 196 transitions, 404 flow [2023-08-26 12:13:32,134 INFO L124 PetriNetUnfolderBase]: 3/196 cut-off events. [2023-08-26 12:13:32,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:32,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 3/196 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 338 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 138. Up to 2 conditions per place. [2023-08-26 12:13:32,139 INFO L119 LiptonReduction]: Number of co-enabled transitions 8996 [2023-08-26 12:13:50,695 INFO L134 LiptonReduction]: Checked pairs total: 41452 [2023-08-26 12:13:50,695 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-26 12:13:50,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:13:50,713 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;@3e74b35f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:13:50,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2023-08-26 12:13:50,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:13:50,715 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:13:50,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:13:50,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:13:50,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:13:50,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:13:50,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:13:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1280, now seen corresponding path program 1 times [2023-08-26 12:13:50,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:13:50,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269995218] [2023-08-26 12:13:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:13:50,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:13:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:13:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:13:50,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:13:50,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269995218] [2023-08-26 12:13:50,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269995218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:13:50,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:13:50,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:13:50,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008260341] [2023-08-26 12:13:50,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:13:50,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:13:50,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:13:50,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:13:50,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:13:50,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 366 [2023-08-26 12:13:50,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:13:50,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:13:50,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 366 [2023-08-26 12:13:50,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:02,848 INFO L124 PetriNetUnfolderBase]: 69461/91513 cut-off events. [2023-08-26 12:14:02,848 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2023-08-26 12:14:03,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183163 conditions, 91513 events. 69461/91513 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 6628. Compared 604656 event pairs, 69461 based on Foata normal form. 1200/48027 useless extension candidates. Maximal degree in co-relation 183151. Up to 91363 conditions per place. [2023-08-26 12:14:03,417 INFO L140 encePairwiseOnDemand]: 333/366 looper letters, 49 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-08-26 12:14:03,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 218 flow [2023-08-26 12:14:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:14:03,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:14:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 372 transitions. [2023-08-26 12:14:03,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081967213114754 [2023-08-26 12:14:03,431 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 372 transitions. [2023-08-26 12:14:03,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 372 transitions. [2023-08-26 12:14:03,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:03,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 372 transitions. [2023-08-26 12:14:03,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 186.0) internal successors, (372), 2 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:03,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:03,449 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:03,451 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 186 flow. Second operand 2 states and 372 transitions. [2023-08-26 12:14:03,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 218 flow [2023-08-26 12:14:03,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:14:03,468 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 116 flow [2023-08-26 12:14:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2023-08-26 12:14:03,473 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -35 predicate places. [2023-08-26 12:14:03,473 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 116 flow [2023-08-26 12:14:03,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 145.5) internal successors, (291), 2 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:03,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:03,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:14:03,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:14:03,474 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:03,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1266631, now seen corresponding path program 1 times [2023-08-26 12:14:03,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:03,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125463899] [2023-08-26 12:14:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:03,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:03,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:03,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125463899] [2023-08-26 12:14:03,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125463899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:03,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:03,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:03,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351952900] [2023-08-26 12:14:03,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:03,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:03,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:03,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:03,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:03,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 366 [2023-08-26 12:14:03,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:03,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:03,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 366 [2023-08-26 12:14:03,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:09,790 INFO L124 PetriNetUnfolderBase]: 31789/42207 cut-off events. [2023-08-26 12:14:09,791 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:14:09,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84642 conditions, 42207 events. 31789/42207 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2019. Compared 237088 event pairs, 31789 based on Foata normal form. 0/26690 useless extension candidates. Maximal degree in co-relation 84639. Up to 42206 conditions per place. [2023-08-26 12:14:10,018 INFO L140 encePairwiseOnDemand]: 355/366 looper letters, 42 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 12:14:10,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 44 transitions, 182 flow [2023-08-26 12:14:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-26 12:14:10,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38160291438979965 [2023-08-26 12:14:10,024 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-26 12:14:10,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-26 12:14:10,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:10,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-26 12:14:10,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:10,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:10,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:10,033 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 116 flow. Second operand 3 states and 419 transitions. [2023-08-26 12:14:10,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 44 transitions, 182 flow [2023-08-26 12:14:10,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:14:10,037 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 98 flow [2023-08-26 12:14:10,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-08-26 12:14:10,040 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -43 predicate places. [2023-08-26 12:14:10,041 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 98 flow [2023-08-26 12:14:10,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:10,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:10,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:14:10,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:14:10,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:10,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:10,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1266630, now seen corresponding path program 1 times [2023-08-26 12:14:10,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496636341] [2023-08-26 12:14:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:10,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:10,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496636341] [2023-08-26 12:14:10,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496636341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:10,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:10,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:10,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594941077] [2023-08-26 12:14:10,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:10,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:10,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:10,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 366 [2023-08-26 12:14:10,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:10,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:10,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 366 [2023-08-26 12:14:10,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:12,863 INFO L124 PetriNetUnfolderBase]: 16483/23232 cut-off events. [2023-08-26 12:14:12,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:14:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46344 conditions, 23232 events. 16483/23232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1233. Compared 140380 event pairs, 9651 based on Foata normal form. 0/19679 useless extension candidates. Maximal degree in co-relation 46340. Up to 12787 conditions per place. [2023-08-26 12:14:12,939 INFO L140 encePairwiseOnDemand]: 346/366 looper letters, 43 selfloop transitions, 10 changer transitions 1/55 dead transitions. [2023-08-26 12:14:12,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 228 flow [2023-08-26 12:14:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-26 12:14:12,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.377959927140255 [2023-08-26 12:14:12,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-26 12:14:12,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-26 12:14:12,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:12,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-26 12:14:12,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:12,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:12,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:12,947 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 98 flow. Second operand 3 states and 415 transitions. [2023-08-26 12:14:12,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 55 transitions, 228 flow [2023-08-26 12:14:12,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:12,949 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 175 flow [2023-08-26 12:14:12,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-26 12:14:12,950 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -43 predicate places. [2023-08-26 12:14:12,950 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 175 flow [2023-08-26 12:14:12,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:12,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:12,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:14:12,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:12,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1213645120, now seen corresponding path program 1 times [2023-08-26 12:14:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:12,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235527874] [2023-08-26 12:14:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:12,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:13,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:13,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235527874] [2023-08-26 12:14:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235527874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:13,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:13,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907255582] [2023-08-26 12:14:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:13,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:13,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 366 [2023-08-26 12:14:13,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:13,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:13,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 366 [2023-08-26 12:14:13,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:15,610 INFO L124 PetriNetUnfolderBase]: 14944/21395 cut-off events. [2023-08-26 12:14:15,610 INFO L125 PetriNetUnfolderBase]: For 6407/6557 co-relation queries the response was YES. [2023-08-26 12:14:15,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57563 conditions, 21395 events. 14944/21395 cut-off events. For 6407/6557 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 133514 event pairs, 7262 based on Foata normal form. 0/20066 useless extension candidates. Maximal degree in co-relation 57558. Up to 12732 conditions per place. [2023-08-26 12:14:15,746 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 75 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-26 12:14:15,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 457 flow [2023-08-26 12:14:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-26 12:14:15,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4544626593806922 [2023-08-26 12:14:15,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-26 12:14:15,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-26 12:14:15,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:15,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-26 12:14:15,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:15,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:15,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:15,753 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 175 flow. Second operand 3 states and 499 transitions. [2023-08-26 12:14:15,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 457 flow [2023-08-26 12:14:15,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:15,800 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 168 flow [2023-08-26 12:14:15,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-26 12:14:15,801 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -43 predicate places. [2023-08-26 12:14:15,801 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 168 flow [2023-08-26 12:14:15,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:15,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:15,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:15,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:14:15,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:15,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:15,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1213644770, now seen corresponding path program 1 times [2023-08-26 12:14:15,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:15,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371499045] [2023-08-26 12:14:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:15,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:15,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:15,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371499045] [2023-08-26 12:14:15,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371499045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:15,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:15,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642111893] [2023-08-26 12:14:15,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:15,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-26 12:14:15,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:15,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:15,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-26 12:14:15,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:18,643 INFO L124 PetriNetUnfolderBase]: 19723/27637 cut-off events. [2023-08-26 12:14:18,643 INFO L125 PetriNetUnfolderBase]: For 5689/5894 co-relation queries the response was YES. [2023-08-26 12:14:18,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72092 conditions, 27637 events. 19723/27637 cut-off events. For 5689/5894 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 163474 event pairs, 11206 based on Foata normal form. 0/24319 useless extension candidates. Maximal degree in co-relation 72086. Up to 22979 conditions per place. [2023-08-26 12:14:18,849 INFO L140 encePairwiseOnDemand]: 362/366 looper letters, 80 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-26 12:14:18,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 87 transitions, 470 flow [2023-08-26 12:14:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-26 12:14:18,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44899817850637525 [2023-08-26 12:14:18,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-26 12:14:18,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-26 12:14:18,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:18,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-26 12:14:18,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:18,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:18,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:18,856 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 168 flow. Second operand 3 states and 493 transitions. [2023-08-26 12:14:18,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 87 transitions, 470 flow [2023-08-26 12:14:18,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:18,859 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 181 flow [2023-08-26 12:14:18,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-26 12:14:18,860 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -42 predicate places. [2023-08-26 12:14:18,860 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 181 flow [2023-08-26 12:14:18,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:18,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:18,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:18,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:14:18,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:18,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:18,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2078936695, now seen corresponding path program 1 times [2023-08-26 12:14:18,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:18,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71766950] [2023-08-26 12:14:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:18,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:19,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:19,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71766950] [2023-08-26 12:14:19,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71766950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:19,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:19,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:14:19,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357140972] [2023-08-26 12:14:19,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:19,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:14:19,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:19,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:14:19,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:14:19,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 366 [2023-08-26 12:14:19,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:19,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:19,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 366 [2023-08-26 12:14:19,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:22,314 INFO L124 PetriNetUnfolderBase]: 18381/25946 cut-off events. [2023-08-26 12:14:22,314 INFO L125 PetriNetUnfolderBase]: For 5835/5835 co-relation queries the response was YES. [2023-08-26 12:14:22,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71663 conditions, 25946 events. 18381/25946 cut-off events. For 5835/5835 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 157876 event pairs, 8035 based on Foata normal form. 0/22754 useless extension candidates. Maximal degree in co-relation 71656. Up to 16848 conditions per place. [2023-08-26 12:14:22,451 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 83 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-26 12:14:22,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 480 flow [2023-08-26 12:14:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:14:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:14:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-26 12:14:22,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36270491803278687 [2023-08-26 12:14:22,453 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-26 12:14:22,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-26 12:14:22,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:22,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-26 12:14:22,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:22,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:22,458 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:22,458 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 181 flow. Second operand 4 states and 531 transitions. [2023-08-26 12:14:22,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 480 flow [2023-08-26 12:14:22,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 88 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:22,467 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 180 flow [2023-08-26 12:14:22,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-08-26 12:14:22,468 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -41 predicate places. [2023-08-26 12:14:22,468 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 180 flow [2023-08-26 12:14:22,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:22,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:22,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:22,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:14:22,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:22,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1031715458, now seen corresponding path program 1 times [2023-08-26 12:14:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348748556] [2023-08-26 12:14:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:23,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:23,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348748556] [2023-08-26 12:14:23,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348748556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:23,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:23,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:14:23,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628690916] [2023-08-26 12:14:23,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:23,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:14:23,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:14:23,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:14:23,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 366 [2023-08-26 12:14:23,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 366 [2023-08-26 12:14:23,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:26,591 INFO L124 PetriNetUnfolderBase]: 27729/39156 cut-off events. [2023-08-26 12:14:26,591 INFO L125 PetriNetUnfolderBase]: For 9791/9791 co-relation queries the response was YES. [2023-08-26 12:14:26,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106038 conditions, 39156 events. 27729/39156 cut-off events. For 9791/9791 co-relation queries the response was YES. Maximal size of possible extension queue 1993. Compared 250919 event pairs, 9652 based on Foata normal form. 160/35356 useless extension candidates. Maximal degree in co-relation 106031. Up to 21659 conditions per place. [2023-08-26 12:14:26,909 INFO L140 encePairwiseOnDemand]: 356/366 looper letters, 90 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2023-08-26 12:14:26,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 105 transitions, 569 flow [2023-08-26 12:14:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:14:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:14:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 681 transitions. [2023-08-26 12:14:26,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721311475409836 [2023-08-26 12:14:26,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 681 transitions. [2023-08-26 12:14:26,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 681 transitions. [2023-08-26 12:14:26,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:26,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 681 transitions. [2023-08-26 12:14:26,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:26,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:26,916 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:26,916 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 180 flow. Second operand 5 states and 681 transitions. [2023-08-26 12:14:26,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 105 transitions, 569 flow [2023-08-26 12:14:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 105 transitions, 564 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:26,924 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 260 flow [2023-08-26 12:14:26,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2023-08-26 12:14:26,925 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -37 predicate places. [2023-08-26 12:14:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 260 flow [2023-08-26 12:14:26,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:26,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:26,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:14:26,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:26,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:26,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1629897428, now seen corresponding path program 2 times [2023-08-26 12:14:26,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:26,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918492867] [2023-08-26 12:14:26,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:27,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918492867] [2023-08-26 12:14:27,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918492867] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:27,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:27,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:14:27,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000169470] [2023-08-26 12:14:27,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:27,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:14:27,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:27,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:14:27,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:14:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 366 [2023-08-26 12:14:27,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 122.5) internal successors, (735), 6 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:27,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:27,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 366 [2023-08-26 12:14:27,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:31,699 INFO L124 PetriNetUnfolderBase]: 27300/38567 cut-off events. [2023-08-26 12:14:31,699 INFO L125 PetriNetUnfolderBase]: For 17458/17458 co-relation queries the response was YES. [2023-08-26 12:14:31,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109774 conditions, 38567 events. 27300/38567 cut-off events. For 17458/17458 co-relation queries the response was YES. Maximal size of possible extension queue 1973. Compared 246665 event pairs, 12320 based on Foata normal form. 160/34767 useless extension candidates. Maximal degree in co-relation 109765. Up to 29275 conditions per place. [2023-08-26 12:14:31,940 INFO L140 encePairwiseOnDemand]: 356/366 looper letters, 99 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2023-08-26 12:14:31,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 113 transitions, 683 flow [2023-08-26 12:14:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:14:31,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:14:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 688 transitions. [2023-08-26 12:14:31,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37595628415300547 [2023-08-26 12:14:31,942 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 688 transitions. [2023-08-26 12:14:31,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 688 transitions. [2023-08-26 12:14:31,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:31,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 688 transitions. [2023-08-26 12:14:31,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:31,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:31,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:31,947 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 260 flow. Second operand 5 states and 688 transitions. [2023-08-26 12:14:31,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 113 transitions, 683 flow [2023-08-26 12:14:31,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 113 transitions, 664 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:31,958 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 319 flow [2023-08-26 12:14:31,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=319, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-26 12:14:31,959 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -34 predicate places. [2023-08-26 12:14:31,959 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 319 flow [2023-08-26 12:14:31,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.5) internal successors, (735), 6 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:31,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:31,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:31,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:14:31,960 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:31,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:31,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1894403917, now seen corresponding path program 1 times [2023-08-26 12:14:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081663421] [2023-08-26 12:14:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:31,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:32,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:32,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081663421] [2023-08-26 12:14:32,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081663421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:32,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:32,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 12:14:32,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824666344] [2023-08-26 12:14:32,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:32,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 12:14:32,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:32,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 12:14:32,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:14:32,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 366 [2023-08-26 12:14:32,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 319 flow. Second operand has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:32,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:32,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 366 [2023-08-26 12:14:32,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:37,206 INFO L124 PetriNetUnfolderBase]: 27035/38191 cut-off events. [2023-08-26 12:14:37,206 INFO L125 PetriNetUnfolderBase]: For 27468/27468 co-relation queries the response was YES. [2023-08-26 12:14:37,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109183 conditions, 38191 events. 27035/38191 cut-off events. For 27468/27468 co-relation queries the response was YES. Maximal size of possible extension queue 1942. Compared 244473 event pairs, 7000 based on Foata normal form. 36/34267 useless extension candidates. Maximal degree in co-relation 109173. Up to 34880 conditions per place. [2023-08-26 12:14:37,440 INFO L140 encePairwiseOnDemand]: 357/366 looper letters, 101 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2023-08-26 12:14:37,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 130 transitions, 901 flow [2023-08-26 12:14:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:14:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:14:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 919 transitions. [2023-08-26 12:14:37,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31386612021857924 [2023-08-26 12:14:37,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 919 transitions. [2023-08-26 12:14:37,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 919 transitions. [2023-08-26 12:14:37,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:37,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 919 transitions. [2023-08-26 12:14:37,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:37,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 366.0) internal successors, (3294), 9 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:37,449 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 366.0) internal successors, (3294), 9 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:37,449 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 319 flow. Second operand 8 states and 919 transitions. [2023-08-26 12:14:37,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 130 transitions, 901 flow [2023-08-26 12:14:37,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 130 transitions, 889 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:37,469 INFO L231 Difference]: Finished difference. Result has 73 places, 81 transitions, 525 flow [2023-08-26 12:14:37,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=525, PETRI_PLACES=73, PETRI_TRANSITIONS=81} [2023-08-26 12:14:37,470 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -26 predicate places. [2023-08-26 12:14:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 81 transitions, 525 flow [2023-08-26 12:14:37,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.66666666666667) internal successors, (951), 9 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:37,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:14:37,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:37,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash -360060872, now seen corresponding path program 1 times [2023-08-26 12:14:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583535445] [2023-08-26 12:14:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:37,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:37,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583535445] [2023-08-26 12:14:37,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583535445] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:37,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:37,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:14:37,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291438823] [2023-08-26 12:14:37,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:37,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:14:37,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:14:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:14:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 366 [2023-08-26 12:14:37,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 81 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:37,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:37,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 366 [2023-08-26 12:14:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:42,050 INFO L124 PetriNetUnfolderBase]: 25538/36516 cut-off events. [2023-08-26 12:14:42,050 INFO L125 PetriNetUnfolderBase]: For 29600/29921 co-relation queries the response was YES. [2023-08-26 12:14:42,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109551 conditions, 36516 events. 25538/36516 cut-off events. For 29600/29921 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 240155 event pairs, 7980 based on Foata normal form. 176/34040 useless extension candidates. Maximal degree in co-relation 109538. Up to 30512 conditions per place. [2023-08-26 12:14:42,304 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 102 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2023-08-26 12:14:42,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 120 transitions, 967 flow [2023-08-26 12:14:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:14:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:14:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-26 12:14:42,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408014571948998 [2023-08-26 12:14:42,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-26 12:14:42,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-26 12:14:42,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:42,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-26 12:14:42,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,310 INFO L175 Difference]: Start difference. First operand has 73 places, 81 transitions, 525 flow. Second operand 3 states and 484 transitions. [2023-08-26 12:14:42,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 120 transitions, 967 flow [2023-08-26 12:14:42,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 946 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:42,410 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 516 flow [2023-08-26 12:14:42,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=516, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-08-26 12:14:42,410 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -25 predicate places. [2023-08-26 12:14:42,410 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 516 flow [2023-08-26 12:14:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:42,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:42,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:14:42,411 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:42,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1918425859, now seen corresponding path program 1 times [2023-08-26 12:14:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:42,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982964711] [2023-08-26 12:14:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:42,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:42,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:42,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982964711] [2023-08-26 12:14:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982964711] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:42,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:14:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916026904] [2023-08-26 12:14:42,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:42,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:14:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:14:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:14:42,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 366 [2023-08-26 12:14:42,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:42,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:42,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 366 [2023-08-26 12:14:42,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:46,558 INFO L124 PetriNetUnfolderBase]: 23131/32774 cut-off events. [2023-08-26 12:14:46,558 INFO L125 PetriNetUnfolderBase]: For 29688/29688 co-relation queries the response was YES. [2023-08-26 12:14:46,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103080 conditions, 32774 events. 23131/32774 cut-off events. For 29688/29688 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 204933 event pairs, 8661 based on Foata normal form. 231/31023 useless extension candidates. Maximal degree in co-relation 103065. Up to 13729 conditions per place. [2023-08-26 12:14:46,804 INFO L140 encePairwiseOnDemand]: 350/366 looper letters, 92 selfloop transitions, 15 changer transitions 0/109 dead transitions. [2023-08-26 12:14:46,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 866 flow [2023-08-26 12:14:46,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:14:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:14:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-26 12:14:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35792349726775957 [2023-08-26 12:14:46,806 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-26 12:14:46,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-26 12:14:46,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:46,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-26 12:14:46,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:46,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:46,810 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:46,810 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 516 flow. Second operand 4 states and 524 transitions. [2023-08-26 12:14:46,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 866 flow [2023-08-26 12:14:46,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 858 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:14:46,919 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 632 flow [2023-08-26 12:14:46,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=632, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2023-08-26 12:14:46,920 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -22 predicate places. [2023-08-26 12:14:46,920 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 632 flow [2023-08-26 12:14:46,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:46,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:46,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:46,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:14:46,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:46,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash 521322523, now seen corresponding path program 1 times [2023-08-26 12:14:46,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:46,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343813048] [2023-08-26 12:14:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:46,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343813048] [2023-08-26 12:14:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343813048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:47,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:14:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211633176] [2023-08-26 12:14:47,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:47,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:14:47,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:47,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:14:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:14:47,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 366 [2023-08-26 12:14:47,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 632 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:47,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:47,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 366 [2023-08-26 12:14:47,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:14:54,787 INFO L124 PetriNetUnfolderBase]: 41867/59333 cut-off events. [2023-08-26 12:14:54,787 INFO L125 PetriNetUnfolderBase]: For 72842/72842 co-relation queries the response was YES. [2023-08-26 12:14:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204966 conditions, 59333 events. 41867/59333 cut-off events. For 72842/72842 co-relation queries the response was YES. Maximal size of possible extension queue 3283. Compared 407951 event pairs, 18409 based on Foata normal form. 288/57178 useless extension candidates. Maximal degree in co-relation 204950. Up to 31511 conditions per place. [2023-08-26 12:14:55,214 INFO L140 encePairwiseOnDemand]: 355/366 looper letters, 127 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2023-08-26 12:14:55,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 167 transitions, 1451 flow [2023-08-26 12:14:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:14:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:14:55,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 728 transitions. [2023-08-26 12:14:55,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978142076502732 [2023-08-26 12:14:55,217 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 728 transitions. [2023-08-26 12:14:55,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 728 transitions. [2023-08-26 12:14:55,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:14:55,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 728 transitions. [2023-08-26 12:14:55,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.6) internal successors, (728), 5 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:55,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:55,221 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:55,221 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 632 flow. Second operand 5 states and 728 transitions. [2023-08-26 12:14:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 167 transitions, 1451 flow [2023-08-26 12:14:55,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 167 transitions, 1444 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:14:55,864 INFO L231 Difference]: Finished difference. Result has 82 places, 110 transitions, 953 flow [2023-08-26 12:14:55,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=953, PETRI_PLACES=82, PETRI_TRANSITIONS=110} [2023-08-26 12:14:55,864 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -17 predicate places. [2023-08-26 12:14:55,865 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 110 transitions, 953 flow [2023-08-26 12:14:55,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:55,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:14:55,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:14:55,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:14:55,865 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:14:55,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:14:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -922671255, now seen corresponding path program 1 times [2023-08-26 12:14:55,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:14:55,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921913521] [2023-08-26 12:14:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:14:55,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:14:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:14:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:14:56,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:14:56,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921913521] [2023-08-26 12:14:56,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921913521] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:14:56,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:14:56,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:14:56,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021910426] [2023-08-26 12:14:56,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:14:56,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:14:56,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:14:56,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:14:56,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:14:56,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-26 12:14:56,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 110 transitions, 953 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:14:56,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:14:56,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-26 12:14:56,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:03,544 INFO L124 PetriNetUnfolderBase]: 40124/57494 cut-off events. [2023-08-26 12:15:03,544 INFO L125 PetriNetUnfolderBase]: For 107845/108821 co-relation queries the response was YES. [2023-08-26 12:15:03,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215697 conditions, 57494 events. 40124/57494 cut-off events. For 107845/108821 co-relation queries the response was YES. Maximal size of possible extension queue 3239. Compared 404980 event pairs, 20058 based on Foata normal form. 306/55319 useless extension candidates. Maximal degree in co-relation 215678. Up to 43670 conditions per place. [2023-08-26 12:15:04,023 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 137 selfloop transitions, 9 changer transitions 0/166 dead transitions. [2023-08-26 12:15:04,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 166 transitions, 1652 flow [2023-08-26 12:15:04,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-26 12:15:04,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-08-26 12:15:04,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-26 12:15:04,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-26 12:15:04,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:04,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-26 12:15:04,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:04,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:04,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:04,028 INFO L175 Difference]: Start difference. First operand has 82 places, 110 transitions, 953 flow. Second operand 3 states and 486 transitions. [2023-08-26 12:15:04,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 166 transitions, 1652 flow [2023-08-26 12:15:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 166 transitions, 1639 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:05,093 INFO L231 Difference]: Finished difference. Result has 84 places, 110 transitions, 975 flow [2023-08-26 12:15:05,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=975, PETRI_PLACES=84, PETRI_TRANSITIONS=110} [2023-08-26 12:15:05,094 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -15 predicate places. [2023-08-26 12:15:05,094 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 110 transitions, 975 flow [2023-08-26 12:15:05,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:05,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:05,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:05,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:15:05,095 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting P3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:05,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -658340089, now seen corresponding path program 1 times [2023-08-26 12:15:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654884158] [2023-08-26 12:15:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:05,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654884158] [2023-08-26 12:15:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654884158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:15:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466899953] [2023-08-26 12:15:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:15:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:15:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:15:05,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 366 [2023-08-26 12:15:05,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 110 transitions, 975 flow. Second operand has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:05,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:05,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 366 [2023-08-26 12:15:05,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:11,610 INFO L124 PetriNetUnfolderBase]: 34291/48849 cut-off events. [2023-08-26 12:15:11,610 INFO L125 PetriNetUnfolderBase]: For 101784/101784 co-relation queries the response was YES. [2023-08-26 12:15:11,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189570 conditions, 48849 events. 34291/48849 cut-off events. For 101784/101784 co-relation queries the response was YES. Maximal size of possible extension queue 2577. Compared 326247 event pairs, 11826 based on Foata normal form. 754/47975 useless extension candidates. Maximal degree in co-relation 189550. Up to 16884 conditions per place. [2023-08-26 12:15:12,011 INFO L140 encePairwiseOnDemand]: 349/366 looper letters, 144 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2023-08-26 12:15:12,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 169 transitions, 1773 flow [2023-08-26 12:15:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:15:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:15:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 752 transitions. [2023-08-26 12:15:12,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3424408014571949 [2023-08-26 12:15:12,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 752 transitions. [2023-08-26 12:15:12,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 752 transitions. [2023-08-26 12:15:12,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:12,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 752 transitions. [2023-08-26 12:15:12,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:12,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:12,019 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 366.0) internal successors, (2562), 7 states have internal predecessors, (2562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:12,019 INFO L175 Difference]: Start difference. First operand has 84 places, 110 transitions, 975 flow. Second operand 6 states and 752 transitions. [2023-08-26 12:15:12,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 169 transitions, 1773 flow [2023-08-26 12:15:13,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 169 transitions, 1741 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:13,042 INFO L231 Difference]: Finished difference. Result has 89 places, 122 transitions, 1206 flow [2023-08-26 12:15:13,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1206, PETRI_PLACES=89, PETRI_TRANSITIONS=122} [2023-08-26 12:15:13,042 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-08-26 12:15:13,042 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 122 transitions, 1206 flow [2023-08-26 12:15:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.42857142857143) internal successors, (801), 7 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:13,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:13,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:13,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:15:13,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:13,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:13,043 INFO L85 PathProgramCache]: Analyzing trace with hash 973557629, now seen corresponding path program 1 times [2023-08-26 12:15:13,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:13,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263533273] [2023-08-26 12:15:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:13,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:13,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:13,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263533273] [2023-08-26 12:15:13,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263533273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:13,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:13,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:13,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807335269] [2023-08-26 12:15:13,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:13,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 366 [2023-08-26 12:15:13,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 122 transitions, 1206 flow. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:13,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:13,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 366 [2023-08-26 12:15:13,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:21,689 INFO L124 PetriNetUnfolderBase]: 49060/69777 cut-off events. [2023-08-26 12:15:21,689 INFO L125 PetriNetUnfolderBase]: For 218969/222718 co-relation queries the response was YES. [2023-08-26 12:15:22,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284857 conditions, 69777 events. 49060/69777 cut-off events. For 218969/222718 co-relation queries the response was YES. Maximal size of possible extension queue 3174. Compared 496728 event pairs, 18142 based on Foata normal form. 1929/69179 useless extension candidates. Maximal degree in co-relation 284836. Up to 40977 conditions per place. [2023-08-26 12:15:22,468 INFO L140 encePairwiseOnDemand]: 363/366 looper letters, 176 selfloop transitions, 3 changer transitions 0/199 dead transitions. [2023-08-26 12:15:22,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 199 transitions, 2257 flow [2023-08-26 12:15:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-26 12:15:22,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-26 12:15:22,471 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-26 12:15:22,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-26 12:15:22,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:22,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-26 12:15:22,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:22,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:22,476 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:22,476 INFO L175 Difference]: Start difference. First operand has 89 places, 122 transitions, 1206 flow. Second operand 3 states and 488 transitions. [2023-08-26 12:15:22,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 199 transitions, 2257 flow [2023-08-26 12:15:23,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 199 transitions, 2238 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:15:23,984 INFO L231 Difference]: Finished difference. Result has 89 places, 122 transitions, 1206 flow [2023-08-26 12:15:23,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1206, PETRI_PLACES=89, PETRI_TRANSITIONS=122} [2023-08-26 12:15:23,984 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -10 predicate places. [2023-08-26 12:15:23,984 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 122 transitions, 1206 flow [2023-08-26 12:15:23,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:23,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:23,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:23,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:15:23,985 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:23,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:23,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1462141530, now seen corresponding path program 1 times [2023-08-26 12:15:23,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:23,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754182696] [2023-08-26 12:15:23,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:23,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:24,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:24,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:24,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754182696] [2023-08-26 12:15:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754182696] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:24,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:24,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:24,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100581303] [2023-08-26 12:15:24,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:24,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:15:24,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:15:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:15:24,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 366 [2023-08-26 12:15:24,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 122 transitions, 1206 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:24,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:24,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 366 [2023-08-26 12:15:24,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:29,151 INFO L124 PetriNetUnfolderBase]: 24813/37457 cut-off events. [2023-08-26 12:15:29,151 INFO L125 PetriNetUnfolderBase]: For 92379/93743 co-relation queries the response was YES. [2023-08-26 12:15:29,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157766 conditions, 37457 events. 24813/37457 cut-off events. For 92379/93743 co-relation queries the response was YES. Maximal size of possible extension queue 2290. Compared 276521 event pairs, 7587 based on Foata normal form. 548/36670 useless extension candidates. Maximal degree in co-relation 157743. Up to 35562 conditions per place. [2023-08-26 12:15:29,442 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 135 selfloop transitions, 5 changer transitions 0/162 dead transitions. [2023-08-26 12:15:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 162 transitions, 1816 flow [2023-08-26 12:15:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:15:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:15:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-26 12:15:29,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42805100182149364 [2023-08-26 12:15:29,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-26 12:15:29,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-26 12:15:29,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:29,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-26 12:15:29,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:29,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:29,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 366.0) internal successors, (1464), 4 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:29,447 INFO L175 Difference]: Start difference. First operand has 89 places, 122 transitions, 1206 flow. Second operand 3 states and 470 transitions. [2023-08-26 12:15:29,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 162 transitions, 1816 flow [2023-08-26 12:15:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 162 transitions, 1808 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:30,345 INFO L231 Difference]: Finished difference. Result has 91 places, 126 transitions, 1234 flow [2023-08-26 12:15:30,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1234, PETRI_PLACES=91, PETRI_TRANSITIONS=126} [2023-08-26 12:15:30,345 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2023-08-26 12:15:30,345 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 126 transitions, 1234 flow [2023-08-26 12:15:30,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:30,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:30,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:15:30,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:15:30,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:30,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1548022367, now seen corresponding path program 1 times [2023-08-26 12:15:30,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:30,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667316031] [2023-08-26 12:15:30,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:30,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:30,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667316031] [2023-08-26 12:15:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667316031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:15:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742642908] [2023-08-26 12:15:30,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:30,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 366 [2023-08-26 12:15:30,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 126 transitions, 1234 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:30,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:30,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 366 [2023-08-26 12:15:30,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:32,547 INFO L124 PetriNetUnfolderBase]: 8776/14660 cut-off events. [2023-08-26 12:15:32,548 INFO L125 PetriNetUnfolderBase]: For 36402/37297 co-relation queries the response was YES. [2023-08-26 12:15:32,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65553 conditions, 14660 events. 8776/14660 cut-off events. For 36402/37297 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 108853 event pairs, 1737 based on Foata normal form. 604/14800 useless extension candidates. Maximal degree in co-relation 65529. Up to 12158 conditions per place. [2023-08-26 12:15:32,667 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 161 selfloop transitions, 9 changer transitions 0/190 dead transitions. [2023-08-26 12:15:32,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 190 transitions, 2120 flow [2023-08-26 12:15:32,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-26 12:15:32,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4262295081967213 [2023-08-26 12:15:32,669 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-26 12:15:32,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-26 12:15:32,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:32,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-26 12:15:32,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:32,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:32,671 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:32,672 INFO L175 Difference]: Start difference. First operand has 91 places, 126 transitions, 1234 flow. Second operand 4 states and 624 transitions. [2023-08-26 12:15:32,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 190 transitions, 2120 flow [2023-08-26 12:15:33,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 190 transitions, 2105 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-26 12:15:33,006 INFO L231 Difference]: Finished difference. Result has 94 places, 125 transitions, 1230 flow [2023-08-26 12:15:33,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1230, PETRI_PLACES=94, PETRI_TRANSITIONS=125} [2023-08-26 12:15:33,006 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -5 predicate places. [2023-08-26 12:15:33,006 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 125 transitions, 1230 flow [2023-08-26 12:15:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:33,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:33,007 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] [2023-08-26 12:15:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:15:33,007 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:33,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -148113045, now seen corresponding path program 1 times [2023-08-26 12:15:33,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:33,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418541772] [2023-08-26 12:15:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418541772] [2023-08-26 12:15:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418541772] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:33,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:33,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:15:33,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649356440] [2023-08-26 12:15:33,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:33,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:15:33,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:15:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:15:33,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 366 [2023-08-26 12:15:33,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 1230 flow. Second operand has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:33,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:33,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 366 [2023-08-26 12:15:33,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:37,136 INFO L124 PetriNetUnfolderBase]: 18496/30767 cut-off events. [2023-08-26 12:15:37,136 INFO L125 PetriNetUnfolderBase]: For 95759/96973 co-relation queries the response was YES. [2023-08-26 12:15:37,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147397 conditions, 30767 events. 18496/30767 cut-off events. For 95759/96973 co-relation queries the response was YES. Maximal size of possible extension queue 1783. Compared 250004 event pairs, 3889 based on Foata normal form. 505/30295 useless extension candidates. Maximal degree in co-relation 147372. Up to 15151 conditions per place. [2023-08-26 12:15:37,347 INFO L140 encePairwiseOnDemand]: 361/366 looper letters, 242 selfloop transitions, 4 changer transitions 6/270 dead transitions. [2023-08-26 12:15:37,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 270 transitions, 3122 flow [2023-08-26 12:15:37,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:15:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:15:37,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 646 transitions. [2023-08-26 12:15:37,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412568306010929 [2023-08-26 12:15:37,349 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 646 transitions. [2023-08-26 12:15:37,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 646 transitions. [2023-08-26 12:15:37,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:37,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 646 transitions. [2023-08-26 12:15:37,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.5) internal successors, (646), 4 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,352 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 366.0) internal successors, (1830), 5 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:37,352 INFO L175 Difference]: Start difference. First operand has 94 places, 125 transitions, 1230 flow. Second operand 4 states and 646 transitions. [2023-08-26 12:15:37,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 270 transitions, 3122 flow [2023-08-26 12:15:38,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 270 transitions, 3080 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 12:15:38,081 INFO L231 Difference]: Finished difference. Result has 96 places, 126 transitions, 1230 flow [2023-08-26 12:15:38,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1230, PETRI_PLACES=96, PETRI_TRANSITIONS=126} [2023-08-26 12:15:38,082 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -3 predicate places. [2023-08-26 12:15:38,082 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 126 transitions, 1230 flow [2023-08-26 12:15:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:38,082 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] [2023-08-26 12:15:38,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:15:38,082 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:38,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash -603096985, now seen corresponding path program 2 times [2023-08-26 12:15:38,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:38,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389118432] [2023-08-26 12:15:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389118432] [2023-08-26 12:15:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389118432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:38,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:38,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:15:38,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767301906] [2023-08-26 12:15:38,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:38,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:15:38,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:15:38,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:15:38,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 366 [2023-08-26 12:15:38,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 126 transitions, 1230 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:38,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:38,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 366 [2023-08-26 12:15:38,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:15:39,867 INFO L124 PetriNetUnfolderBase]: 5112/9012 cut-off events. [2023-08-26 12:15:39,868 INFO L125 PetriNetUnfolderBase]: For 27786/28940 co-relation queries the response was YES. [2023-08-26 12:15:39,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40750 conditions, 9012 events. 5112/9012 cut-off events. For 27786/28940 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 66683 event pairs, 508 based on Foata normal form. 975/9800 useless extension candidates. Maximal degree in co-relation 40724. Up to 3541 conditions per place. [2023-08-26 12:15:39,902 INFO L140 encePairwiseOnDemand]: 360/366 looper letters, 147 selfloop transitions, 13 changer transitions 12/188 dead transitions. [2023-08-26 12:15:39,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 188 transitions, 2035 flow [2023-08-26 12:15:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:15:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:15:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 775 transitions. [2023-08-26 12:15:39,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42349726775956287 [2023-08-26 12:15:39,904 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 775 transitions. [2023-08-26 12:15:39,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 775 transitions. [2023-08-26 12:15:39,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:15:39,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 775 transitions. [2023-08-26 12:15:39,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 155.0) internal successors, (775), 5 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 366.0) internal successors, (2196), 6 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,908 INFO L175 Difference]: Start difference. First operand has 96 places, 126 transitions, 1230 flow. Second operand 5 states and 775 transitions. [2023-08-26 12:15:39,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 188 transitions, 2035 flow [2023-08-26 12:15:39,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 188 transitions, 2001 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-26 12:15:39,979 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 863 flow [2023-08-26 12:15:39,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=366, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=863, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-26 12:15:39,979 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -3 predicate places. [2023-08-26 12:15:39,979 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 863 flow [2023-08-26 12:15:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:39,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:15:39,980 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] [2023-08-26 12:15:39,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 12:15:39,980 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2023-08-26 12:15:39,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:15:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1195377347, now seen corresponding path program 1 times [2023-08-26 12:15:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:15:39,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386301206] [2023-08-26 12:15:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:15:39,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:15:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:15:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:15:40,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:15:40,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386301206] [2023-08-26 12:15:40,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386301206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:15:40,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:15:40,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:15:40,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095424290] [2023-08-26 12:15:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:15:40,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:15:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:15:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:15:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:15:40,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 366 [2023-08-26 12:15:40,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 863 flow. Second operand has 6 states, 6 states have (on average 142.5) internal successors, (855), 6 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:15:40,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:15:40,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 366 [2023-08-26 12:15:40,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand