/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:20:43,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:20:43,102 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 15:20:43,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:20:43,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:20:43,137 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:20:43,138 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:20:43,138 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:20:43,139 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:20:43,142 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:20:43,142 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:20:43,143 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:20:43,143 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:20:43,144 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:20:43,144 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:20:43,144 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:20:43,145 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:20:43,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:20:43,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:20:43,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:20:43,145 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:20:43,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:20:43,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:20:43,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:20:43,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:20:43,147 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:20:43,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:20:43,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:20:43,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:20:43,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:20:43,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:20:43,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:20:43,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:20:43,150 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:20:43,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:20:43,150 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:20:43,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:20:43,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:20:43,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:20:43,484 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:20:43,485 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:20:43,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2023-08-26 15:20:44,661 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:20:44,944 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:20:44,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_power.opt.i [2023-08-26 15:20:44,960 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328b645d4/a504ab70b5594c12b57cad8e40bea0eb/FLAG0af3530a6 [2023-08-26 15:20:44,974 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/328b645d4/a504ab70b5594c12b57cad8e40bea0eb [2023-08-26 15:20:44,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:20:44,979 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:20:44,982 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:20:44,982 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:20:44,985 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:20:44,985 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:44" (1/1) ... [2023-08-26 15:20:44,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f247079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:44, skipping insertion in model container [2023-08-26 15:20:44,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:44" (1/1) ... [2023-08-26 15:20:45,040 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:20:45,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:20:45,423 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:20:45,440 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 15:20:45,442 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-26 15:20:45,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:20:45,514 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:20:45,514 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:20:45,520 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:20:45,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45 WrapperNode [2023-08-26 15:20:45,525 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:20:45,526 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:20:45,526 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:20:45,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:20:45,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,579 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 200 [2023-08-26 15:20:45,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:20:45,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:20:45,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:20:45,580 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:20:45,587 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,591 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,603 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,612 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,615 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,616 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,620 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:20:45,621 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:20:45,621 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:20:45,621 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:20:45,625 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (1/1) ... [2023-08-26 15:20:45,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:20:45,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:20:45,657 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 15:20:45,686 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 15:20:45,699 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:20:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:20:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:20:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:20:45,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:20:45,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:20:45,701 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:20:45,701 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:20:45,701 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:20:45,701 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:20:45,701 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:20:45,701 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:20:45,701 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 15:20:45,701 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 15:20:45,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:20:45,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:20:45,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:20:45,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:20:45,704 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 15:20:45,887 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:20:45,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:20:46,452 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:20:47,091 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:20:47,091 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:20:47,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:47 BoogieIcfgContainer [2023-08-26 15:20:47,093 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:20:47,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:20:47,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:20:47,099 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:20:47,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:20:44" (1/3) ... [2023-08-26 15:20:47,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49389379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:47, skipping insertion in model container [2023-08-26 15:20:47,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:45" (2/3) ... [2023-08-26 15:20:47,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49389379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:47, skipping insertion in model container [2023-08-26 15:20:47,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:47" (3/3) ... [2023-08-26 15:20:47,102 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_power.opt.i [2023-08-26 15:20:47,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:20:47,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2023-08-26 15:20:47,118 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:20:47,301 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:20:47,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 203 transitions, 426 flow [2023-08-26 15:20:47,479 INFO L124 PetriNetUnfolderBase]: 3/199 cut-off events. [2023-08-26 15:20:47,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:47,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 3/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 326 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2023-08-26 15:20:47,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 203 transitions, 426 flow [2023-08-26 15:20:47,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 199 transitions, 410 flow [2023-08-26 15:20:47,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:20:47,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 199 transitions, 410 flow [2023-08-26 15:20:47,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 199 transitions, 410 flow [2023-08-26 15:20:47,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 199 transitions, 410 flow [2023-08-26 15:20:47,575 INFO L124 PetriNetUnfolderBase]: 3/199 cut-off events. [2023-08-26 15:20:47,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:47,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 3/199 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 326 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2023-08-26 15:20:47,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 10348 [2023-08-26 15:20:58,906 INFO L134 LiptonReduction]: Checked pairs total: 60878 [2023-08-26 15:20:58,906 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-08-26 15:20:58,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:20:58,923 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;@2446e939, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:20:58,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2023-08-26 15:20:58,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:20:58,925 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 15:20:58,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:20:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:20:58,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:20:58,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:20:58,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:20:58,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1301, now seen corresponding path program 1 times [2023-08-26 15:20:58,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:20:58,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924720034] [2023-08-26 15:20:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:20:58,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:20:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:20:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:20:59,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:20:59,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924720034] [2023-08-26 15:20:59,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924720034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:20:59,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:20:59,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:20:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633530076] [2023-08-26 15:20:59,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:20:59,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:20:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:20:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:20:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:20:59,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 369 [2023-08-26 15:20:59,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 91 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 140.5) internal successors, (281), 2 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:20:59,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:20:59,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 369 [2023-08-26 15:20:59,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:32,227 INFO L124 PetriNetUnfolderBase]: 211735/278390 cut-off events. [2023-08-26 15:21:32,227 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 15:21:32,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553614 conditions, 278390 events. 211735/278390 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 16571. Compared 1952903 event pairs, 211735 based on Foata normal form. 0/125246 useless extension candidates. Maximal degree in co-relation 553602. Up to 274017 conditions per place. [2023-08-26 15:21:33,791 INFO L140 encePairwiseOnDemand]: 335/369 looper letters, 53 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2023-08-26 15:21:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 228 flow [2023-08-26 15:21:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:21:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:21:33,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 367 transitions. [2023-08-26 15:21:33,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.497289972899729 [2023-08-26 15:21:33,811 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 367 transitions. [2023-08-26 15:21:33,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 367 transitions. [2023-08-26 15:21:33,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:33,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 367 transitions. [2023-08-26 15:21:33,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:33,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:33,826 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 369.0) internal successors, (1107), 3 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:33,828 INFO L175 Difference]: Start difference. First operand has 102 places, 91 transitions, 194 flow. Second operand 2 states and 367 transitions. [2023-08-26 15:21:33,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 228 flow [2023-08-26 15:21:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 224 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:21:33,912 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 118 flow [2023-08-26 15:21:33,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=118, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-26 15:21:33,916 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -37 predicate places. [2023-08-26 15:21:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 118 flow [2023-08-26 15:21:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 140.5) internal successors, (281), 2 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:33,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:21:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:21:33,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:21:33,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash 39913070, now seen corresponding path program 1 times [2023-08-26 15:21:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460502427] [2023-08-26 15:21:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:34,165 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 15:21:34,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:34,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460502427] [2023-08-26 15:21:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460502427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:34,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:21:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127746725] [2023-08-26 15:21:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:34,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 369 [2023-08-26 15:21:34,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:34,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:34,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 369 [2023-08-26 15:21:34,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:21:54,448 INFO L124 PetriNetUnfolderBase]: 134660/181277 cut-off events. [2023-08-26 15:21:54,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:21:54,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361798 conditions, 181277 events. 134660/181277 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8907. Compared 1271862 event pairs, 82564 based on Foata normal form. 0/106210 useless extension candidates. Maximal degree in co-relation 361795. Up to 105060 conditions per place. [2023-08-26 15:21:55,497 INFO L140 encePairwiseOnDemand]: 349/369 looper letters, 66 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2023-08-26 15:21:55,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 314 flow [2023-08-26 15:21:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:21:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:21:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-26 15:21:55,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974706413730804 [2023-08-26 15:21:55,499 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-26 15:21:55,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-26 15:21:55,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:21:55,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-26 15:21:55,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 15:21:55,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:55,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:55,504 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 118 flow. Second operand 3 states and 440 transitions. [2023-08-26 15:21:55,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 314 flow [2023-08-26 15:21:55,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:21:55,506 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 202 flow [2023-08-26 15:21:55,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-26 15:21:55,507 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -35 predicate places. [2023-08-26 15:21:55,507 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 202 flow [2023-08-26 15:21:55,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:55,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:21:55,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:21:55,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:21:55,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:21:55,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:21:55,509 INFO L85 PathProgramCache]: Analyzing trace with hash 39913071, now seen corresponding path program 1 times [2023-08-26 15:21:55,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:21:55,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648610850] [2023-08-26 15:21:55,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:21:55,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:21:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:21:55,647 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 15:21:55,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:21:55,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648610850] [2023-08-26 15:21:55,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648610850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:21:55,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:21:55,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:21:55,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556106156] [2023-08-26 15:21:55,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:21:55,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:21:55,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:21:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:21:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:21:55,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 369 [2023-08-26 15:21:55,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:21:55,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:21:55,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 369 [2023-08-26 15:21:55,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:02,282 INFO L124 PetriNetUnfolderBase]: 33746/47679 cut-off events. [2023-08-26 15:22:02,283 INFO L125 PetriNetUnfolderBase]: For 13662/13662 co-relation queries the response was YES. [2023-08-26 15:22:02,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127498 conditions, 47679 events. 33746/47679 cut-off events. For 13662/13662 co-relation queries the response was YES. Maximal size of possible extension queue 2614. Compared 316835 event pairs, 26917 based on Foata normal form. 10902/53009 useless extension candidates. Maximal degree in co-relation 127493. Up to 44944 conditions per place. [2023-08-26 15:22:02,543 INFO L140 encePairwiseOnDemand]: 358/369 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 15:22:02,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 278 flow [2023-08-26 15:22:02,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:02,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:02,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-26 15:22:02,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2023-08-26 15:22:02,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-26 15:22:02,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-26 15:22:02,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:02,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-26 15:22:02,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:02,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:02,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:02,549 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 202 flow. Second operand 3 states and 420 transitions. [2023-08-26 15:22:02,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 278 flow [2023-08-26 15:22:02,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:02,649 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 164 flow [2023-08-26 15:22:02,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-26 15:22:02,650 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -45 predicate places. [2023-08-26 15:22:02,650 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 164 flow [2023-08-26 15:22:02,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:02,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:02,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:22:02,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:22:02,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P1Err0ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:02,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash -295348076, now seen corresponding path program 1 times [2023-08-26 15:22:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099430410] [2023-08-26 15:22:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:02,932 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 15:22:02,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099430410] [2023-08-26 15:22:02,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099430410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:02,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:02,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:02,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732033607] [2023-08-26 15:22:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:02,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:02,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:02,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:02,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 369 [2023-08-26 15:22:02,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:02,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:02,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 369 [2023-08-26 15:22:02,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:08,212 INFO L124 PetriNetUnfolderBase]: 27727/39264 cut-off events. [2023-08-26 15:22:08,213 INFO L125 PetriNetUnfolderBase]: For 5574/5638 co-relation queries the response was YES. [2023-08-26 15:22:08,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99784 conditions, 39264 events. 27727/39264 cut-off events. For 5574/5638 co-relation queries the response was YES. Maximal size of possible extension queue 2227. Compared 269077 event pairs, 5397 based on Foata normal form. 64/32028 useless extension candidates. Maximal degree in co-relation 99779. Up to 32100 conditions per place. [2023-08-26 15:22:08,425 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 81 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-26 15:22:08,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 442 flow [2023-08-26 15:22:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:08,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-26 15:22:08,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4408310749774164 [2023-08-26 15:22:08,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-26 15:22:08,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-26 15:22:08,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:08,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-26 15:22:08,430 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 15:22:08,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:08,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:08,433 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 164 flow. Second operand 3 states and 488 transitions. [2023-08-26 15:22:08,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 442 flow [2023-08-26 15:22:08,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:22:08,437 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 165 flow [2023-08-26 15:22:08,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2023-08-26 15:22:08,438 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -45 predicate places. [2023-08-26 15:22:08,439 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 165 flow [2023-08-26 15:22:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:08,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:08,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:08,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:22:08,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:08,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:08,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1817300996, now seen corresponding path program 1 times [2023-08-26 15:22:08,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:08,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005640292] [2023-08-26 15:22:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:08,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:22:08,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:08,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005640292] [2023-08-26 15:22:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005640292] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:08,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:08,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787472668] [2023-08-26 15:22:08,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:08,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:08,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:08,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 369 [2023-08-26 15:22:08,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:08,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:08,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 369 [2023-08-26 15:22:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:14,575 INFO L124 PetriNetUnfolderBase]: 32918/46115 cut-off events. [2023-08-26 15:22:14,575 INFO L125 PetriNetUnfolderBase]: For 8296/8392 co-relation queries the response was YES. [2023-08-26 15:22:14,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118499 conditions, 46115 events. 32918/46115 cut-off events. For 8296/8392 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 292447 event pairs, 7996 based on Foata normal form. 48/38019 useless extension candidates. Maximal degree in co-relation 118494. Up to 41809 conditions per place. [2023-08-26 15:22:14,872 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 74 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2023-08-26 15:22:14,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 411 flow [2023-08-26 15:22:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-26 15:22:14,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2023-08-26 15:22:14,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-26 15:22:14,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-26 15:22:14,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:14,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-26 15:22:14,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:14,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:14,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:14,879 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 165 flow. Second operand 3 states and 474 transitions. [2023-08-26 15:22:14,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 411 flow [2023-08-26 15:22:14,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 405 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:14,884 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 180 flow [2023-08-26 15:22:14,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-26 15:22:14,884 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -44 predicate places. [2023-08-26 15:22:14,885 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 180 flow [2023-08-26 15:22:14,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:14,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:14,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:14,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:22:14,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:14,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:14,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1817301259, now seen corresponding path program 1 times [2023-08-26 15:22:14,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:14,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600168210] [2023-08-26 15:22:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:14,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:14,987 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 15:22:14,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:14,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600168210] [2023-08-26 15:22:14,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600168210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:14,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:14,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:14,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050092228] [2023-08-26 15:22:14,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:14,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:14,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:14,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:14,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:14,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 369 [2023-08-26 15:22:14,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:14,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:14,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 369 [2023-08-26 15:22:14,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:20,659 INFO L124 PetriNetUnfolderBase]: 31082/44063 cut-off events. [2023-08-26 15:22:20,660 INFO L125 PetriNetUnfolderBase]: For 7283/7283 co-relation queries the response was YES. [2023-08-26 15:22:20,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114756 conditions, 44063 events. 31082/44063 cut-off events. For 7283/7283 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 283620 event pairs, 12944 based on Foata normal form. 0/36495 useless extension candidates. Maximal degree in co-relation 114750. Up to 32593 conditions per place. [2023-08-26 15:22:20,950 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 74 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2023-08-26 15:22:20,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 81 transitions, 431 flow [2023-08-26 15:22:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-26 15:22:20,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2023-08-26 15:22:20,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-26 15:22:20,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-26 15:22:20,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:20,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-26 15:22:20,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:20,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:20,959 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:20,959 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 180 flow. Second operand 3 states and 483 transitions. [2023-08-26 15:22:20,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 81 transitions, 431 flow [2023-08-26 15:22:20,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:22:20,966 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 190 flow [2023-08-26 15:22:20,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2023-08-26 15:22:20,969 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -42 predicate places. [2023-08-26 15:22:20,971 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 190 flow [2023-08-26 15:22:20,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:20,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:20,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:22:20,972 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:20,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash -501757733, now seen corresponding path program 1 times [2023-08-26 15:22:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:20,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855428765] [2023-08-26 15:22:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:20,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:21,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:22:21,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:21,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855428765] [2023-08-26 15:22:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855428765] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:21,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:22:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798982657] [2023-08-26 15:22:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:22:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:22:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:22:21,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 369 [2023-08-26 15:22:21,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:21,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:21,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 369 [2023-08-26 15:22:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:27,541 INFO L124 PetriNetUnfolderBase]: 35404/50569 cut-off events. [2023-08-26 15:22:27,542 INFO L125 PetriNetUnfolderBase]: For 11680/11680 co-relation queries the response was YES. [2023-08-26 15:22:27,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136224 conditions, 50569 events. 35404/50569 cut-off events. For 11680/11680 co-relation queries the response was YES. Maximal size of possible extension queue 2493. Compared 338751 event pairs, 12040 based on Foata normal form. 0/44201 useless extension candidates. Maximal degree in co-relation 136217. Up to 23510 conditions per place. [2023-08-26 15:22:27,866 INFO L140 encePairwiseOnDemand]: 358/369 looper letters, 65 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2023-08-26 15:22:27,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 436 flow [2023-08-26 15:22:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:22:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:22:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 658 transitions. [2023-08-26 15:22:27,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35663956639566397 [2023-08-26 15:22:27,869 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 658 transitions. [2023-08-26 15:22:27,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 658 transitions. [2023-08-26 15:22:27,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:27,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 658 transitions. [2023-08-26 15:22:27,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:27,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:27,876 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 369.0) internal successors, (2214), 6 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:27,876 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 190 flow. Second operand 5 states and 658 transitions. [2023-08-26 15:22:27,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 436 flow [2023-08-26 15:22:27,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:27,887 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 226 flow [2023-08-26 15:22:27,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-26 15:22:27,894 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -41 predicate places. [2023-08-26 15:22:27,895 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 226 flow [2023-08-26 15:22:27,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.0) internal successors, (595), 5 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:27,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:27,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:22:27,895 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:27,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -501757732, now seen corresponding path program 1 times [2023-08-26 15:22:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443090347] [2023-08-26 15:22:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:28,307 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 15:22:28,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:28,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443090347] [2023-08-26 15:22:28,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443090347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:28,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:28,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:22:28,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305933609] [2023-08-26 15:22:28,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:28,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:22:28,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:22:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:22:28,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 369 [2023-08-26 15:22:28,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:28,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:28,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 369 [2023-08-26 15:22:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:34,470 INFO L124 PetriNetUnfolderBase]: 33389/48314 cut-off events. [2023-08-26 15:22:34,471 INFO L125 PetriNetUnfolderBase]: For 18731/18731 co-relation queries the response was YES. [2023-08-26 15:22:34,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136325 conditions, 48314 events. 33389/48314 cut-off events. For 18731/18731 co-relation queries the response was YES. Maximal size of possible extension queue 2470. Compared 331566 event pairs, 12712 based on Foata normal form. 240/45934 useless extension candidates. Maximal degree in co-relation 136318. Up to 36600 conditions per place. [2023-08-26 15:22:34,987 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 74 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-26 15:22:34,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 478 flow [2023-08-26 15:22:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:22:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:22:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 547 transitions. [2023-08-26 15:22:34,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705962059620596 [2023-08-26 15:22:34,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 547 transitions. [2023-08-26 15:22:34,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 547 transitions. [2023-08-26 15:22:34,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:34,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 547 transitions. [2023-08-26 15:22:34,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:34,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:34,995 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:34,995 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 226 flow. Second operand 4 states and 547 transitions. [2023-08-26 15:22:34,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 478 flow [2023-08-26 15:22:34,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:35,001 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 224 flow [2023-08-26 15:22:35,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-26 15:22:35,005 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -41 predicate places. [2023-08-26 15:22:35,006 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 224 flow [2023-08-26 15:22:35,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:35,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:35,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:35,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:22:35,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:35,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -501872170, now seen corresponding path program 1 times [2023-08-26 15:22:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958841792] [2023-08-26 15:22:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:35,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:35,225 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 15:22:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958841792] [2023-08-26 15:22:35,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958841792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:35,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:35,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281456629] [2023-08-26 15:22:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:35,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 369 [2023-08-26 15:22:35,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:35,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:35,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 369 [2023-08-26 15:22:35,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:41,295 INFO L124 PetriNetUnfolderBase]: 33160/47889 cut-off events. [2023-08-26 15:22:41,295 INFO L125 PetriNetUnfolderBase]: For 23865/24041 co-relation queries the response was YES. [2023-08-26 15:22:41,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135348 conditions, 47889 events. 33160/47889 cut-off events. For 23865/24041 co-relation queries the response was YES. Maximal size of possible extension queue 2458. Compared 331602 event pairs, 12929 based on Foata normal form. 44/45217 useless extension candidates. Maximal degree in co-relation 135342. Up to 43668 conditions per place. [2023-08-26 15:22:41,616 INFO L140 encePairwiseOnDemand]: 365/369 looper letters, 78 selfloop transitions, 4 changer transitions 0/87 dead transitions. [2023-08-26 15:22:41,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 512 flow [2023-08-26 15:22:41,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-26 15:22:41,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43179765130984643 [2023-08-26 15:22:41,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-26 15:22:41,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-26 15:22:41,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:41,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-26 15:22:41,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:41,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:41,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:41,621 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 224 flow. Second operand 3 states and 478 transitions. [2023-08-26 15:22:41,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 512 flow [2023-08-26 15:22:41,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 506 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:41,627 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 256 flow [2023-08-26 15:22:41,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-26 15:22:41,628 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -40 predicate places. [2023-08-26 15:22:41,628 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 256 flow [2023-08-26 15:22:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:41,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:41,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:41,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:22:41,629 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:41,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1621829604, now seen corresponding path program 1 times [2023-08-26 15:22:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:41,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35636918] [2023-08-26 15:22:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:41,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:41,817 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 15:22:41,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:41,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35636918] [2023-08-26 15:22:41,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35636918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:41,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:41,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509248627] [2023-08-26 15:22:41,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:41,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:41,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-26 15:22:41,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:41,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:41,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-26 15:22:41,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:47,987 INFO L124 PetriNetUnfolderBase]: 33237/48114 cut-off events. [2023-08-26 15:22:47,987 INFO L125 PetriNetUnfolderBase]: For 24557/24557 co-relation queries the response was YES. [2023-08-26 15:22:48,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141004 conditions, 48114 events. 33237/48114 cut-off events. For 24557/24557 co-relation queries the response was YES. Maximal size of possible extension queue 2470. Compared 330323 event pairs, 12608 based on Foata normal form. 36/45530 useless extension candidates. Maximal degree in co-relation 140997. Up to 36553 conditions per place. [2023-08-26 15:22:48,315 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 73 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2023-08-26 15:22:48,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 83 transitions, 508 flow [2023-08-26 15:22:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-26 15:22:48,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42999096657633246 [2023-08-26 15:22:48,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-26 15:22:48,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-26 15:22:48,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:48,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-26 15:22:48,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:48,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:48,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:48,320 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 256 flow. Second operand 3 states and 476 transitions. [2023-08-26 15:22:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 83 transitions, 508 flow [2023-08-26 15:22:48,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 504 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:22:48,338 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 269 flow [2023-08-26 15:22:48,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2023-08-26 15:22:48,338 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -38 predicate places. [2023-08-26 15:22:48,339 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 269 flow [2023-08-26 15:22:48,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:48,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:48,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:48,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:22:48,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:48,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:48,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1625383444, now seen corresponding path program 1 times [2023-08-26 15:22:48,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:48,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065461998] [2023-08-26 15:22:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:48,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:48,579 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 15:22:48,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:48,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065461998] [2023-08-26 15:22:48,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065461998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:48,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:48,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:22:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965198099] [2023-08-26 15:22:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:48,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:48,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 369 [2023-08-26 15:22:48,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 269 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:48,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:48,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 369 [2023-08-26 15:22:48,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:22:57,655 INFO L124 PetriNetUnfolderBase]: 52213/74538 cut-off events. [2023-08-26 15:22:57,655 INFO L125 PetriNetUnfolderBase]: For 45392/45584 co-relation queries the response was YES. [2023-08-26 15:22:57,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219427 conditions, 74538 events. 52213/74538 cut-off events. For 45392/45584 co-relation queries the response was YES. Maximal size of possible extension queue 3778. Compared 530413 event pairs, 19476 based on Foata normal form. 384/70542 useless extension candidates. Maximal degree in co-relation 219419. Up to 40188 conditions per place. [2023-08-26 15:22:58,139 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 85 selfloop transitions, 3 changer transitions 0/91 dead transitions. [2023-08-26 15:22:58,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 91 transitions, 579 flow [2023-08-26 15:22:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:22:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:22:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-26 15:22:58,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4290876242095754 [2023-08-26 15:22:58,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-26 15:22:58,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-26 15:22:58,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:22:58,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-26 15:22:58,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:58,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:58,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:58,144 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 269 flow. Second operand 3 states and 475 transitions. [2023-08-26 15:22:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 91 transitions, 579 flow [2023-08-26 15:22:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 91 transitions, 569 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:22:58,163 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 270 flow [2023-08-26 15:22:58,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-26 15:22:58,164 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -37 predicate places. [2023-08-26 15:22:58,164 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 270 flow [2023-08-26 15:22:58,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:58,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:22:58,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:22:58,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:22:58,165 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:22:58,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:22:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1546586714, now seen corresponding path program 1 times [2023-08-26 15:22:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:22:58,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092503381] [2023-08-26 15:22:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:22:58,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:22:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:22:58,402 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 15:22:58,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:22:58,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092503381] [2023-08-26 15:22:58,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092503381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:22:58,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:22:58,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:22:58,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739534194] [2023-08-26 15:22:58,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:22:58,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:22:58,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:22:58,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:22:58,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:22:58,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 369 [2023-08-26 15:22:58,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:22:58,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:22:58,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 369 [2023-08-26 15:22:58,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:06,835 INFO L124 PetriNetUnfolderBase]: 46705/67442 cut-off events. [2023-08-26 15:23:06,835 INFO L125 PetriNetUnfolderBase]: For 39215/39503 co-relation queries the response was YES. [2023-08-26 15:23:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200539 conditions, 67442 events. 46705/67442 cut-off events. For 39215/39503 co-relation queries the response was YES. Maximal size of possible extension queue 3885. Compared 493657 event pairs, 21222 based on Foata normal form. 116/63322 useless extension candidates. Maximal degree in co-relation 200530. Up to 53762 conditions per place. [2023-08-26 15:23:07,259 INFO L140 encePairwiseOnDemand]: 366/369 looper letters, 88 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-26 15:23:07,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 603 flow [2023-08-26 15:23:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:23:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:23:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2023-08-26 15:23:07,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372177055103884 [2023-08-26 15:23:07,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2023-08-26 15:23:07,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2023-08-26 15:23:07,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:07,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2023-08-26 15:23:07,263 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 15:23:07,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:07,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:07,265 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 270 flow. Second operand 3 states and 484 transitions. [2023-08-26 15:23:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 603 flow [2023-08-26 15:23:07,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 96 transitions, 595 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 15:23:07,282 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 276 flow [2023-08-26 15:23:07,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-08-26 15:23:07,283 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -35 predicate places. [2023-08-26 15:23:07,283 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 276 flow [2023-08-26 15:23:07,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:07,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:07,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:23:07,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:23:07,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting P2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:23:07,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1625420527, now seen corresponding path program 1 times [2023-08-26 15:23:07,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:07,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560418425] [2023-08-26 15:23:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:07,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:23:07,493 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 15:23:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:23:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560418425] [2023-08-26 15:23:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560418425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:23:07,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:23:07,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:23:07,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967364095] [2023-08-26 15:23:07,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:23:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:23:07,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:23:07,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:23:07,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:23:07,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 369 [2023-08-26 15:23:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 276 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 15:23:07,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:23:07,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 369 [2023-08-26 15:23:07,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:14,671 INFO L124 PetriNetUnfolderBase]: 40183/57514 cut-off events. [2023-08-26 15:23:14,671 INFO L125 PetriNetUnfolderBase]: For 37956/38072 co-relation queries the response was YES. [2023-08-26 15:23:14,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177523 conditions, 57514 events. 40183/57514 cut-off events. For 37956/38072 co-relation queries the response was YES. Maximal size of possible extension queue 3357. Compared 398643 event pairs, 11954 based on Foata normal form. 500/54887 useless extension candidates. Maximal degree in co-relation 177513. Up to 25189 conditions per place. [2023-08-26 15:23:15,033 INFO L140 encePairwiseOnDemand]: 351/369 looper letters, 69 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2023-08-26 15:23:15,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 590 flow [2023-08-26 15:23:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:23:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:23:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 529 transitions. [2023-08-26 15:23:15,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3584010840108401 [2023-08-26 15:23:15,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 529 transitions. [2023-08-26 15:23:15,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 529 transitions. [2023-08-26 15:23:15,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:15,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 529 transitions. [2023-08-26 15:23:15,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:15,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:15,039 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:15,039 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 276 flow. Second operand 4 states and 529 transitions. [2023-08-26 15:23:15,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 590 flow [2023-08-26 15:23:15,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 576 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:23:15,089 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 403 flow [2023-08-26 15:23:15,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=403, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2023-08-26 15:23:15,090 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -32 predicate places. [2023-08-26 15:23:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 403 flow [2023-08-26 15:23:15,090 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 15:23:15,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:15,090 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 15:23:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:23:15,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:23:15,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1655321896, now seen corresponding path program 1 times [2023-08-26 15:23:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827427674] [2023-08-26 15:23:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:23:15,291 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 15:23:15,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:23:15,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827427674] [2023-08-26 15:23:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827427674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:23:15,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:23:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:23:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122069574] [2023-08-26 15:23:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:23:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:23:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:23:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:23:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:23:15,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 369 [2023-08-26 15:23:15,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 403 flow. Second operand has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:15,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:23:15,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 369 [2023-08-26 15:23:15,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:29,024 INFO L124 PetriNetUnfolderBase]: 75049/107270 cut-off events. [2023-08-26 15:23:29,024 INFO L125 PetriNetUnfolderBase]: For 168590/169405 co-relation queries the response was YES. [2023-08-26 15:23:29,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379711 conditions, 107270 events. 75049/107270 cut-off events. For 168590/169405 co-relation queries the response was YES. Maximal size of possible extension queue 5634. Compared 810039 event pairs, 13955 based on Foata normal form. 432/101847 useless extension candidates. Maximal degree in co-relation 379700. Up to 55292 conditions per place. [2023-08-26 15:23:29,739 INFO L140 encePairwiseOnDemand]: 364/369 looper letters, 134 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2023-08-26 15:23:29,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 142 transitions, 1189 flow [2023-08-26 15:23:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:23:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:23:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 631 transitions. [2023-08-26 15:23:29,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275067750677507 [2023-08-26 15:23:29,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 631 transitions. [2023-08-26 15:23:29,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 631 transitions. [2023-08-26 15:23:29,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:29,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 631 transitions. [2023-08-26 15:23:29,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:29,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:29,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 369.0) internal successors, (1845), 5 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:29,745 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 403 flow. Second operand 4 states and 631 transitions. [2023-08-26 15:23:29,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 142 transitions, 1189 flow [2023-08-26 15:23:30,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 142 transitions, 1182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:23:30,088 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 430 flow [2023-08-26 15:23:30,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-08-26 15:23:30,088 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -29 predicate places. [2023-08-26 15:23:30,088 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 430 flow [2023-08-26 15:23:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:30,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:30,089 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 15:23:30,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:23:30,089 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:23:30,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:30,089 INFO L85 PathProgramCache]: Analyzing trace with hash -696032928, now seen corresponding path program 2 times [2023-08-26 15:23:30,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:30,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352976570] [2023-08-26 15:23:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:30,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:30,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:23:31,651 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 15:23:31,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:23:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352976570] [2023-08-26 15:23:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352976570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:23:31,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:23:31,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 15:23:31,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905699404] [2023-08-26 15:23:31,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:23:31,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 15:23:31,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:23:31,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 15:23:31,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-26 15:23:31,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 369 [2023-08-26 15:23:31,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 430 flow. Second operand has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:31,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:23:31,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 369 [2023-08-26 15:23:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:23:49,888 INFO L124 PetriNetUnfolderBase]: 99524/140261 cut-off events. [2023-08-26 15:23:49,888 INFO L125 PetriNetUnfolderBase]: For 191720/191880 co-relation queries the response was YES. [2023-08-26 15:23:50,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506133 conditions, 140261 events. 99524/140261 cut-off events. For 191720/191880 co-relation queries the response was YES. Maximal size of possible extension queue 8077. Compared 1053154 event pairs, 48156 based on Foata normal form. 474/131327 useless extension candidates. Maximal degree in co-relation 506120. Up to 105966 conditions per place. [2023-08-26 15:23:50,937 INFO L140 encePairwiseOnDemand]: 348/369 looper letters, 170 selfloop transitions, 44 changer transitions 0/216 dead transitions. [2023-08-26 15:23:50,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 216 transitions, 1662 flow [2023-08-26 15:23:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:23:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:23:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1393 transitions. [2023-08-26 15:23:50,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31458897922312556 [2023-08-26 15:23:50,941 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1393 transitions. [2023-08-26 15:23:50,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1393 transitions. [2023-08-26 15:23:50,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:23:50,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1393 transitions. [2023-08-26 15:23:50,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.08333333333333) internal successors, (1393), 12 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:50,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:50,950 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 369.0) internal successors, (4797), 13 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:50,950 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 430 flow. Second operand 12 states and 1393 transitions. [2023-08-26 15:23:50,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 216 transitions, 1662 flow [2023-08-26 15:23:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 216 transitions, 1643 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:23:51,481 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 923 flow [2023-08-26 15:23:51,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=923, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2023-08-26 15:23:51,482 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2023-08-26 15:23:51,482 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 923 flow [2023-08-26 15:23:51,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 103.7) internal successors, (1037), 10 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:23:51,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:23:51,482 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 15:23:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 15:23:51,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONASSERT === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2023-08-26 15:23:51,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:23:51,483 INFO L85 PathProgramCache]: Analyzing trace with hash -58373450, now seen corresponding path program 3 times [2023-08-26 15:23:51,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:23:51,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419523151] [2023-08-26 15:23:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:23:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:23:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat