/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/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:19:20,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:19:20,882 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 15:19:20,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:19:20,887 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:19:20,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:19:20,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:19:20,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:19:20,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:19:20,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:19:20,923 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:19:20,923 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:19:20,923 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:19:20,924 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:19:20,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:19:20,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:19:20,925 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:19:20,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:19:20,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:19:20,926 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:19:20,926 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:19:20,927 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:19:20,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:19:20,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:19:20,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:19:20,928 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:19:20,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:19:20,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:20,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:19:20,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:19:20,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:19:20,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:19:20,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:19:20,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:19:20,931 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:19:20,931 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:19:21,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:19:21,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:19:21,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:19:21,285 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:19:21,286 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:19:21,287 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 15:19:22,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:19:22,815 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:19:22,815 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 15:19:22,833 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d6f8438/57634151cab44e58b4e89e556e87cf1a/FLAG80dc77fb6 [2023-08-26 15:19:22,846 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5d6f8438/57634151cab44e58b4e89e556e87cf1a [2023-08-26 15:19:22,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:19:22,849 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:19:22,850 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:22,850 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:19:22,853 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:19:22,853 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:22" (1/1) ... [2023-08-26 15:19:22,854 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13b0d032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:22, skipping insertion in model container [2023-08-26 15:19:22,854 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:19:22" (1/1) ... [2023-08-26 15:19:22,891 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:19:23,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:23,247 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:19:23,272 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:19:23,274 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:19:23,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:19:23,333 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:23,333 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:19:23,339 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:19:23,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23 WrapperNode [2023-08-26 15:19:23,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:19:23,341 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:23,341 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:19:23,341 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:19:23,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,376 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,394 INFO L138 Inliner]: procedures = 177, calls = 63, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2023-08-26 15:19:23,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:19:23,395 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:19:23,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:19:23,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:19:23,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,419 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:19:23,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:19:23,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:19:23,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:19:23,440 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (1/1) ... [2023-08-26 15:19:23,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:19:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:19:23,471 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 15:19:23,500 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 15:19:23,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:19:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:19:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:19:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:19:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:19:23,513 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:19:23,514 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:19:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:19:23,514 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:19:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:19:23,514 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:19:23,514 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-26 15:19:23,514 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-26 15:19:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:19:23,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:19:23,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:19:23,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:19:23,517 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 15:19:23,670 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:19:23,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:19:23,833 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:19:23,839 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:19:23,840 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:19:23,841 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:23 BoogieIcfgContainer [2023-08-26 15:19:23,842 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:19:23,844 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:19:23,844 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:19:23,846 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:19:23,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:19:22" (1/3) ... [2023-08-26 15:19:23,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c304a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:23, skipping insertion in model container [2023-08-26 15:19:23,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:19:23" (2/3) ... [2023-08-26 15:19:23,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c304a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:19:23, skipping insertion in model container [2023-08-26 15:19:23,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:19:23" (3/3) ... [2023-08-26 15:19:23,849 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 15:19:23,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:19:23,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 15:19:23,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:19:23,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:19:23,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 110 transitions, 240 flow [2023-08-26 15:19:24,010 INFO L124 PetriNetUnfolderBase]: 3/106 cut-off events. [2023-08-26 15:19:24,010 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:24,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 106 events. 3/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-26 15:19:24,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 110 transitions, 240 flow [2023-08-26 15:19:24,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 90 transitions, 192 flow [2023-08-26 15:19:24,022 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:19:24,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 90 transitions, 192 flow [2023-08-26 15:19:24,032 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 90 transitions, 192 flow [2023-08-26 15:19:24,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 90 transitions, 192 flow [2023-08-26 15:19:24,053 INFO L124 PetriNetUnfolderBase]: 1/90 cut-off events. [2023-08-26 15:19:24,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:24,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 90 events. 1/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2023-08-26 15:19:24,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 1766 [2023-08-26 15:19:26,735 INFO L134 LiptonReduction]: Checked pairs total: 3202 [2023-08-26 15:19:26,735 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-26 15:19:26,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:19:26,752 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;@66717beb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:19:26,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-26 15:19:26,754 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:19:26,754 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 15:19:26,754 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:26,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:26,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:19:26,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:26,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:26,759 INFO L85 PathProgramCache]: Analyzing trace with hash 379, now seen corresponding path program 1 times [2023-08-26 15:19:26,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:26,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147691859] [2023-08-26 15:19:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:26,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:26,855 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 15:19:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147691859] [2023-08-26 15:19:26,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147691859] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:26,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:19:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276207032] [2023-08-26 15:19:26,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:26,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:19:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:19:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:19:26,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 202 [2023-08-26 15:19:26,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 68 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:26,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:26,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 202 [2023-08-26 15:19:26,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:27,066 INFO L124 PetriNetUnfolderBase]: 704/1046 cut-off events. [2023-08-26 15:19:27,066 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 15:19:27,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2158 conditions, 1046 events. 704/1046 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4373 event pairs, 704 based on Foata normal form. 0/1036 useless extension candidates. Maximal degree in co-relation 2146. Up to 1027 conditions per place. [2023-08-26 15:19:27,076 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 18 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-26 15:19:27,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 88 flow [2023-08-26 15:19:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:19:27,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:19:27,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 230 transitions. [2023-08-26 15:19:27,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693069306930693 [2023-08-26 15:19:27,088 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 230 transitions. [2023-08-26 15:19:27,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 230 transitions. [2023-08-26 15:19:27,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:27,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 230 transitions. [2023-08-26 15:19:27,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 115.0) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,097 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,098 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 68 flow. Second operand 2 states and 230 transitions. [2023-08-26 15:19:27,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 88 flow [2023-08-26 15:19:27,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 15:19:27,102 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 48 flow [2023-08-26 15:19:27,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=48, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 15:19:27,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -11 predicate places. [2023-08-26 15:19:27,107 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 48 flow [2023-08-26 15:19:27,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:27,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:19:27,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:27,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1516605352, now seen corresponding path program 1 times [2023-08-26 15:19:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:27,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973582902] [2023-08-26 15:19:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:27,525 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 15:19:27,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:27,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973582902] [2023-08-26 15:19:27,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973582902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:27,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:27,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:19:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221941581] [2023-08-26 15:19:27,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:27,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:19:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:27,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:19:27,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:19:27,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:27,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:27,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:27,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:27,766 INFO L124 PetriNetUnfolderBase]: 2019/2943 cut-off events. [2023-08-26 15:19:27,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:19:27,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6083 conditions, 2943 events. 2019/2943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13624 event pairs, 796 based on Foata normal form. 109/3052 useless extension candidates. Maximal degree in co-relation 6080. Up to 1819 conditions per place. [2023-08-26 15:19:27,787 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 30 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2023-08-26 15:19:27,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 162 flow [2023-08-26 15:19:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:19:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:19:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-08-26 15:19:27,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132013201320133 [2023-08-26 15:19:27,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-08-26 15:19:27,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-08-26 15:19:27,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:27,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-08-26 15:19:27,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,802 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 48 flow. Second operand 3 states and 311 transitions. [2023-08-26 15:19:27,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 162 flow [2023-08-26 15:19:27,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 162 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:19:27,806 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 102 flow [2023-08-26 15:19:27,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-08-26 15:19:27,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 15:19:27,808 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 102 flow [2023-08-26 15:19:27,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:27,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:27,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:27,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:19:27,813 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:27,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash 229872616, now seen corresponding path program 1 times [2023-08-26 15:19:27,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533123508] [2023-08-26 15:19:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:27,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:28,045 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 15:19:28,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:28,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533123508] [2023-08-26 15:19:28,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533123508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:28,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:28,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:19:28,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12988586] [2023-08-26 15:19:28,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:28,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:19:28,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:28,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:19:28,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:19:28,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:28,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:28,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:28,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:28,304 INFO L124 PetriNetUnfolderBase]: 1886/2759 cut-off events. [2023-08-26 15:19:28,304 INFO L125 PetriNetUnfolderBase]: For 1160/1160 co-relation queries the response was YES. [2023-08-26 15:19:28,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7640 conditions, 2759 events. 1886/2759 cut-off events. For 1160/1160 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12609 event pairs, 269 based on Foata normal form. 33/2792 useless extension candidates. Maximal degree in co-relation 7635. Up to 1394 conditions per place. [2023-08-26 15:19:28,321 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-26 15:19:28,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 260 flow [2023-08-26 15:19:28,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:19:28,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:19:28,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 407 transitions. [2023-08-26 15:19:28,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5037128712871287 [2023-08-26 15:19:28,323 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 407 transitions. [2023-08-26 15:19:28,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 407 transitions. [2023-08-26 15:19:28,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:28,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 407 transitions. [2023-08-26 15:19:28,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,327 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,327 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 102 flow. Second operand 4 states and 407 transitions. [2023-08-26 15:19:28,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 260 flow [2023-08-26 15:19:28,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:19:28,334 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 146 flow [2023-08-26 15:19:28,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-26 15:19:28,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-26 15:19:28,335 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 146 flow [2023-08-26 15:19:28,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:28,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:28,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:19:28,335 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:28,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:28,336 INFO L85 PathProgramCache]: Analyzing trace with hash 229872585, now seen corresponding path program 1 times [2023-08-26 15:19:28,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:28,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249136430] [2023-08-26 15:19:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:28,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:28,445 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 15:19:28,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:28,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249136430] [2023-08-26 15:19:28,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249136430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:28,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:28,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:19:28,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895021473] [2023-08-26 15:19:28,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:28,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:19:28,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:19:28,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:19:28,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:28,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:28,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:28,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:28,676 INFO L124 PetriNetUnfolderBase]: 1794/2633 cut-off events. [2023-08-26 15:19:28,676 INFO L125 PetriNetUnfolderBase]: For 2444/2444 co-relation queries the response was YES. [2023-08-26 15:19:28,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 2633 events. 1794/2633 cut-off events. For 2444/2444 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12115 event pairs, 287 based on Foata normal form. 16/2649 useless extension candidates. Maximal degree in co-relation 7997. Up to 1438 conditions per place. [2023-08-26 15:19:28,696 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 46 selfloop transitions, 16 changer transitions 0/62 dead transitions. [2023-08-26 15:19:28,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 406 flow [2023-08-26 15:19:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:19:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:19:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-26 15:19:28,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136138613861386 [2023-08-26 15:19:28,698 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-26 15:19:28,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-26 15:19:28,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:28,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-26 15:19:28,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,702 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 146 flow. Second operand 4 states and 415 transitions. [2023-08-26 15:19:28,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 406 flow [2023-08-26 15:19:28,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:19:28,711 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 296 flow [2023-08-26 15:19:28,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-26 15:19:28,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 15:19:28,712 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 296 flow [2023-08-26 15:19:28,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.75) internal successors, (375), 4 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:28,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:19:28,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:28,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1463879489, now seen corresponding path program 1 times [2023-08-26 15:19:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846818219] [2023-08-26 15:19:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:28,818 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 15:19:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846818219] [2023-08-26 15:19:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846818219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:28,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:19:28,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784510821] [2023-08-26 15:19:28,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:28,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:19:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:19:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:19:28,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 202 [2023-08-26 15:19:28,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:28,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:28,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 202 [2023-08-26 15:19:28,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:29,034 INFO L124 PetriNetUnfolderBase]: 1605/2384 cut-off events. [2023-08-26 15:19:29,035 INFO L125 PetriNetUnfolderBase]: For 5244/5367 co-relation queries the response was YES. [2023-08-26 15:19:29,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8276 conditions, 2384 events. 1605/2384 cut-off events. For 5244/5367 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10838 event pairs, 399 based on Foata normal form. 76/2449 useless extension candidates. Maximal degree in co-relation 8266. Up to 1923 conditions per place. [2023-08-26 15:19:29,052 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 44 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2023-08-26 15:19:29,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 512 flow [2023-08-26 15:19:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:19:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:19:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-26 15:19:29,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297029702970297 [2023-08-26 15:19:29,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-26 15:19:29,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-26 15:19:29,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:29,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-26 15:19:29,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,057 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,057 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 296 flow. Second operand 3 states and 321 transitions. [2023-08-26 15:19:29,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 512 flow [2023-08-26 15:19:29,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 512 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:19:29,067 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 374 flow [2023-08-26 15:19:29,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2023-08-26 15:19:29,068 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2023-08-26 15:19:29,068 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 374 flow [2023-08-26 15:19:29,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:29,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:29,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:19:29,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:29,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -897403478, now seen corresponding path program 1 times [2023-08-26 15:19:29,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:29,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27138654] [2023-08-26 15:19:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:29,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:29,168 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 15:19:29,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:29,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27138654] [2023-08-26 15:19:29,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27138654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:29,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:29,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:19:29,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165779547] [2023-08-26 15:19:29,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:29,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:19:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:29,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:19:29,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:19:29,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:29,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 374 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:29,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:29,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:29,390 INFO L124 PetriNetUnfolderBase]: 1673/2462 cut-off events. [2023-08-26 15:19:29,391 INFO L125 PetriNetUnfolderBase]: For 5970/5970 co-relation queries the response was YES. [2023-08-26 15:19:29,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9265 conditions, 2462 events. 1673/2462 cut-off events. For 5970/5970 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11048 event pairs, 387 based on Foata normal form. 16/2478 useless extension candidates. Maximal degree in co-relation 9253. Up to 1231 conditions per place. [2023-08-26 15:19:29,412 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 57 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2023-08-26 15:19:29,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 78 transitions, 702 flow [2023-08-26 15:19:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:19:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:19:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-26 15:19:29,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136138613861386 [2023-08-26 15:19:29,414 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-26 15:19:29,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-26 15:19:29,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:29,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-26 15:19:29,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,418 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 374 flow. Second operand 4 states and 415 transitions. [2023-08-26 15:19:29,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 78 transitions, 702 flow [2023-08-26 15:19:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 691 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:19:29,430 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 554 flow [2023-08-26 15:19:29,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-08-26 15:19:29,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-26 15:19:29,436 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 554 flow [2023-08-26 15:19:29,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:29,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:29,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:19:29,437 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:29,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1953952028, now seen corresponding path program 1 times [2023-08-26 15:19:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:29,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183430728] [2023-08-26 15:19:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:29,549 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 15:19:29,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:29,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183430728] [2023-08-26 15:19:29,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183430728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:29,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:29,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:19:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914186928] [2023-08-26 15:19:29,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:19:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:19:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:19:29,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:29,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 554 flow. Second operand has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:29,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:29,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:29,929 INFO L124 PetriNetUnfolderBase]: 2373/3514 cut-off events. [2023-08-26 15:19:29,929 INFO L125 PetriNetUnfolderBase]: For 14562/14562 co-relation queries the response was YES. [2023-08-26 15:19:29,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14309 conditions, 3514 events. 2373/3514 cut-off events. For 14562/14562 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16848 event pairs, 387 based on Foata normal form. 60/3574 useless extension candidates. Maximal degree in co-relation 14295. Up to 1564 conditions per place. [2023-08-26 15:19:29,951 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 49 selfloop transitions, 19 changer transitions 33/101 dead transitions. [2023-08-26 15:19:29,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 101 transitions, 1154 flow [2023-08-26 15:19:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:19:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:19:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 511 transitions. [2023-08-26 15:19:29,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505940594059406 [2023-08-26 15:19:29,953 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 511 transitions. [2023-08-26 15:19:29,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 511 transitions. [2023-08-26 15:19:29,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:29,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 511 transitions. [2023-08-26 15:19:29,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,957 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,957 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 554 flow. Second operand 5 states and 511 transitions. [2023-08-26 15:19:29,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 101 transitions, 1154 flow [2023-08-26 15:19:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:19:29,979 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 499 flow [2023-08-26 15:19:29,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-26 15:19:29,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-26 15:19:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 499 flow [2023-08-26 15:19:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.8) internal successors, (469), 5 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:29,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:29,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:19:29,980 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:29,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2049728834, now seen corresponding path program 1 times [2023-08-26 15:19:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:29,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915042848] [2023-08-26 15:19:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:30,064 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 15:19:30,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915042848] [2023-08-26 15:19:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915042848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:30,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:30,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:19:30,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506723931] [2023-08-26 15:19:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:30,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:19:30,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:19:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:19:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 202 [2023-08-26 15:19:30,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 499 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:30,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 202 [2023-08-26 15:19:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:30,239 INFO L124 PetriNetUnfolderBase]: 1257/1972 cut-off events. [2023-08-26 15:19:30,239 INFO L125 PetriNetUnfolderBase]: For 8380/8392 co-relation queries the response was YES. [2023-08-26 15:19:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8149 conditions, 1972 events. 1257/1972 cut-off events. For 8380/8392 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9745 event pairs, 513 based on Foata normal form. 48/1976 useless extension candidates. Maximal degree in co-relation 8133. Up to 973 conditions per place. [2023-08-26 15:19:30,253 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 38 selfloop transitions, 8 changer transitions 5/56 dead transitions. [2023-08-26 15:19:30,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 651 flow [2023-08-26 15:19:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:19:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:19:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-26 15:19:30,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297029702970297 [2023-08-26 15:19:30,255 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-26 15:19:30,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-26 15:19:30,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:30,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-26 15:19:30,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,257 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 499 flow. Second operand 3 states and 321 transitions. [2023-08-26 15:19:30,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 651 flow [2023-08-26 15:19:30,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 598 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 15:19:30,272 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 407 flow [2023-08-26 15:19:30,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=407, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-26 15:19:30,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-26 15:19:30,273 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 407 flow [2023-08-26 15:19:30,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:30,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:30,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:19:30,274 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:30,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2049705770, now seen corresponding path program 1 times [2023-08-26 15:19:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:30,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710373655] [2023-08-26 15:19:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:30,382 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 15:19:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710373655] [2023-08-26 15:19:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710373655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:30,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:19:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119866506] [2023-08-26 15:19:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:19:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:19:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:19:30,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-26 15:19:30,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:30,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-26 15:19:30,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:30,599 INFO L124 PetriNetUnfolderBase]: 1158/1867 cut-off events. [2023-08-26 15:19:30,599 INFO L125 PetriNetUnfolderBase]: For 9171/9341 co-relation queries the response was YES. [2023-08-26 15:19:30,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6948 conditions, 1867 events. 1158/1867 cut-off events. For 9171/9341 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 10149 event pairs, 272 based on Foata normal form. 176/2005 useless extension candidates. Maximal degree in co-relation 6932. Up to 1247 conditions per place. [2023-08-26 15:19:30,610 INFO L140 encePairwiseOnDemand]: 195/202 looper letters, 73 selfloop transitions, 10 changer transitions 14/106 dead transitions. [2023-08-26 15:19:30,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 106 transitions, 1227 flow [2023-08-26 15:19:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:19:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:19:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 519 transitions. [2023-08-26 15:19:30,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138613861386139 [2023-08-26 15:19:30,612 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 519 transitions. [2023-08-26 15:19:30,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 519 transitions. [2023-08-26 15:19:30,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:30,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 519 transitions. [2023-08-26 15:19:30,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,616 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,616 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 407 flow. Second operand 5 states and 519 transitions. [2023-08-26 15:19:30,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 106 transitions, 1227 flow [2023-08-26 15:19:30,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 106 transitions, 1149 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-26 15:19:30,624 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 455 flow [2023-08-26 15:19:30,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-26 15:19:30,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2023-08-26 15:19:30,625 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 455 flow [2023-08-26 15:19:30,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:30,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:30,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:19:30,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:30,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 831521779, now seen corresponding path program 1 times [2023-08-26 15:19:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955386030] [2023-08-26 15:19:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:30,731 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 15:19:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955386030] [2023-08-26 15:19:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955386030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:30,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:19:30,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395204416] [2023-08-26 15:19:30,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:19:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:30,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:19:30,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:19:30,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-26 15:19:30,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:30,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-26 15:19:30,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:30,965 INFO L124 PetriNetUnfolderBase]: 1152/1905 cut-off events. [2023-08-26 15:19:30,965 INFO L125 PetriNetUnfolderBase]: For 8649/9102 co-relation queries the response was YES. [2023-08-26 15:19:30,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9124 conditions, 1905 events. 1152/1905 cut-off events. For 8649/9102 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10791 event pairs, 77 based on Foata normal form. 251/2115 useless extension candidates. Maximal degree in co-relation 9105. Up to 1123 conditions per place. [2023-08-26 15:19:30,977 INFO L140 encePairwiseOnDemand]: 195/202 looper letters, 88 selfloop transitions, 18 changer transitions 24/139 dead transitions. [2023-08-26 15:19:30,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 139 transitions, 1590 flow [2023-08-26 15:19:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:19:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:19:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 726 transitions. [2023-08-26 15:19:30,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134370579915134 [2023-08-26 15:19:30,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 726 transitions. [2023-08-26 15:19:30,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 726 transitions. [2023-08-26 15:19:30,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:30,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 726 transitions. [2023-08-26 15:19:30,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 103.71428571428571) internal successors, (726), 7 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,985 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,985 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 455 flow. Second operand 7 states and 726 transitions. [2023-08-26 15:19:30,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 139 transitions, 1590 flow [2023-08-26 15:19:30,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 139 transitions, 1585 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:19:30,996 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 575 flow [2023-08-26 15:19:30,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-26 15:19:30,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2023-08-26 15:19:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 575 flow [2023-08-26 15:19:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:30,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:30,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:19:30,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:30,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash 7367041, now seen corresponding path program 1 times [2023-08-26 15:19:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991646309] [2023-08-26 15:19:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:31,123 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 15:19:31,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:31,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991646309] [2023-08-26 15:19:31,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991646309] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:31,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:31,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:19:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139287847] [2023-08-26 15:19:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:19:31,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:31,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:19:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:19:31,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-26 15:19:31,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:31,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-26 15:19:31,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:31,416 INFO L124 PetriNetUnfolderBase]: 1096/1838 cut-off events. [2023-08-26 15:19:31,417 INFO L125 PetriNetUnfolderBase]: For 10137/11092 co-relation queries the response was YES. [2023-08-26 15:19:31,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 1838 events. 1096/1838 cut-off events. For 10137/11092 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 10496 event pairs, 23 based on Foata normal form. 306/2111 useless extension candidates. Maximal degree in co-relation 10687. Up to 1091 conditions per place. [2023-08-26 15:19:31,426 INFO L140 encePairwiseOnDemand]: 195/202 looper letters, 72 selfloop transitions, 14 changer transitions 69/163 dead transitions. [2023-08-26 15:19:31,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 163 transitions, 1956 flow [2023-08-26 15:19:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:19:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:19:31,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 932 transitions. [2023-08-26 15:19:31,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126512651265126 [2023-08-26 15:19:31,429 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 932 transitions. [2023-08-26 15:19:31,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 932 transitions. [2023-08-26 15:19:31,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:31,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 932 transitions. [2023-08-26 15:19:31,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.55555555555556) internal successors, (932), 9 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,435 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,435 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 575 flow. Second operand 9 states and 932 transitions. [2023-08-26 15:19:31,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 163 transitions, 1956 flow [2023-08-26 15:19:31,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 163 transitions, 1907 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-26 15:19:31,464 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 564 flow [2023-08-26 15:19:31,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=564, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-26 15:19:31,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2023-08-26 15:19:31,465 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 564 flow [2023-08-26 15:19:31,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 96.66666666666667) internal successors, (580), 6 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:31,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:31,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:19:31,466 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:31,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash 931033192, now seen corresponding path program 1 times [2023-08-26 15:19:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:31,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206914549] [2023-08-26 15:19:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:31,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:19:31,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206914549] [2023-08-26 15:19:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206914549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:31,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:31,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:19:31,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939886069] [2023-08-26 15:19:31,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:31,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:19:31,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:31,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:19:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:19:31,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:31,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 564 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:31,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:31,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:31,760 INFO L124 PetriNetUnfolderBase]: 664/1138 cut-off events. [2023-08-26 15:19:31,760 INFO L125 PetriNetUnfolderBase]: For 6885/6885 co-relation queries the response was YES. [2023-08-26 15:19:31,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6702 conditions, 1138 events. 664/1138 cut-off events. For 6885/6885 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5422 event pairs, 71 based on Foata normal form. 7/1145 useless extension candidates. Maximal degree in co-relation 6677. Up to 449 conditions per place. [2023-08-26 15:19:31,767 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 56 selfloop transitions, 17 changer transitions 65/138 dead transitions. [2023-08-26 15:19:31,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 138 transitions, 1655 flow [2023-08-26 15:19:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:19:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:19:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 606 transitions. [2023-08-26 15:19:31,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 15:19:31,769 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 606 transitions. [2023-08-26 15:19:31,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 606 transitions. [2023-08-26 15:19:31,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:31,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 606 transitions. [2023-08-26 15:19:31,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 202.0) internal successors, (1414), 7 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,773 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 202.0) internal successors, (1414), 7 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,773 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 564 flow. Second operand 6 states and 606 transitions. [2023-08-26 15:19:31,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 138 transitions, 1655 flow [2023-08-26 15:19:31,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 138 transitions, 1346 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-08-26 15:19:31,794 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 473 flow [2023-08-26 15:19:31,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=473, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2023-08-26 15:19:31,794 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2023-08-26 15:19:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 473 flow [2023-08-26 15:19:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:31,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:31,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:19:31,795 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:31,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1381393382, now seen corresponding path program 2 times [2023-08-26 15:19:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562688535] [2023-08-26 15:19:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:31,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:31,920 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 15:19:31,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:31,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562688535] [2023-08-26 15:19:31,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562688535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:31,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:31,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:19:31,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789800112] [2023-08-26 15:19:31,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:31,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:19:31,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:19:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:19:31,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-26 15:19:31,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 473 flow. Second operand has 7 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:31,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:31,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-26 15:19:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:32,048 INFO L124 PetriNetUnfolderBase]: 238/449 cut-off events. [2023-08-26 15:19:32,048 INFO L125 PetriNetUnfolderBase]: For 2023/2164 co-relation queries the response was YES. [2023-08-26 15:19:32,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2246 conditions, 449 events. 238/449 cut-off events. For 2023/2164 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1954 event pairs, 12 based on Foata normal form. 60/495 useless extension candidates. Maximal degree in co-relation 2224. Up to 145 conditions per place. [2023-08-26 15:19:32,051 INFO L140 encePairwiseOnDemand]: 195/202 looper letters, 21 selfloop transitions, 17 changer transitions 48/88 dead transitions. [2023-08-26 15:19:32,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 1045 flow [2023-08-26 15:19:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:19:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:19:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 809 transitions. [2023-08-26 15:19:32,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006188118811881 [2023-08-26 15:19:32,054 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 809 transitions. [2023-08-26 15:19:32,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 809 transitions. [2023-08-26 15:19:32,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:32,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 809 transitions. [2023-08-26 15:19:32,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 101.125) internal successors, (809), 8 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,058 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,059 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 473 flow. Second operand 8 states and 809 transitions. [2023-08-26 15:19:32,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 1045 flow [2023-08-26 15:19:32,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 983 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-26 15:19:32,067 INFO L231 Difference]: Finished difference. Result has 70 places, 32 transitions, 286 flow [2023-08-26 15:19:32,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=286, PETRI_PLACES=70, PETRI_TRANSITIONS=32} [2023-08-26 15:19:32,067 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-08-26 15:19:32,067 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 32 transitions, 286 flow [2023-08-26 15:19:32,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:19:32,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:32,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:19:32,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 15:19:32,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:19:32,069 INFO L85 PathProgramCache]: Analyzing trace with hash 655228076, now seen corresponding path program 1 times [2023-08-26 15:19:32,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:19:32,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187347457] [2023-08-26 15:19:32,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:19:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:19:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:19:32,188 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 15:19:32,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:19:32,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187347457] [2023-08-26 15:19:32,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187347457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:19:32,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:19:32,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:19:32,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923622016] [2023-08-26 15:19:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:19:32,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:19:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:19:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:19:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:19:32,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-26 15:19:32,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 32 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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 15:19:32,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:19:32,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-26 15:19:32,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:19:32,225 INFO L124 PetriNetUnfolderBase]: 44/94 cut-off events. [2023-08-26 15:19:32,226 INFO L125 PetriNetUnfolderBase]: For 494/494 co-relation queries the response was YES. [2023-08-26 15:19:32,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 94 events. 44/94 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 181 event pairs, 14 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 523. Up to 57 conditions per place. [2023-08-26 15:19:32,226 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 0 selfloop transitions, 0 changer transitions 35/35 dead transitions. [2023-08-26 15:19:32,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 35 transitions, 370 flow [2023-08-26 15:19:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:19:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:19:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2023-08-26 15:19:32,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777227722772277 [2023-08-26 15:19:32,228 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2023-08-26 15:19:32,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2023-08-26 15:19:32,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:19:32,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2023-08-26 15:19:32,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,231 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:19:32,231 INFO L175 Difference]: Start difference. First operand has 70 places, 32 transitions, 286 flow. Second operand 4 states and 386 transitions. [2023-08-26 15:19:32,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 35 transitions, 370 flow [2023-08-26 15:19:32,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 35 transitions, 240 flow, removed 17 selfloop flow, removed 25 redundant places. [2023-08-26 15:19:32,233 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-26 15:19:32,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-26 15:19:32,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-26 15:19:32,233 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-26 15:19:32,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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 15:19:32,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2023-08-26 15:19:32,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-08-26 15:19:32,236 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (4 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2023-08-26 15:19:32,237 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 13 remaining) [2023-08-26 15:19:32,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 15:19:32,238 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:19:32,240 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:19:32,240 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:19:32,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:19:32 BasicIcfg [2023-08-26 15:19:32,243 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:19:32,243 INFO L158 Benchmark]: Toolchain (without parser) took 9394.22ms. Allocated memory was 367.0MB in the beginning and 578.8MB in the end (delta: 211.8MB). Free memory was 341.4MB in the beginning and 284.6MB in the end (delta: 56.8MB). Peak memory consumption was 270.7MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,243 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 367.0MB. Free memory was 343.8MB in the beginning and 343.7MB in the end (delta: 169.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,244 INFO L158 Benchmark]: CACSL2BoogieTranslator took 489.84ms. Allocated memory is still 367.0MB. Free memory was 341.4MB in the beginning and 320.7MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,244 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.02ms. Allocated memory is still 367.0MB. Free memory was 320.7MB in the beginning and 318.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,244 INFO L158 Benchmark]: Boogie Preprocessor took 43.13ms. Allocated memory is still 367.0MB. Free memory was 318.6MB in the beginning and 317.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:19:32,244 INFO L158 Benchmark]: RCFGBuilder took 402.66ms. Allocated memory is still 367.0MB. Free memory was 317.3MB in the beginning and 301.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,245 INFO L158 Benchmark]: TraceAbstraction took 8399.24ms. Allocated memory was 367.0MB in the beginning and 578.8MB in the end (delta: 211.8MB). Free memory was 300.5MB in the beginning and 284.6MB in the end (delta: 15.9MB). Peak memory consumption was 230.8MB. Max. memory is 16.0GB. [2023-08-26 15:19:32,246 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 367.0MB. Free memory was 343.8MB in the beginning and 343.7MB in the end (delta: 169.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 489.84ms. Allocated memory is still 367.0MB. Free memory was 341.4MB in the beginning and 320.7MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 54.02ms. Allocated memory is still 367.0MB. Free memory was 320.7MB in the beginning and 318.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.13ms. Allocated memory is still 367.0MB. Free memory was 318.6MB in the beginning and 317.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 402.66ms. Allocated memory is still 367.0MB. Free memory was 317.3MB in the beginning and 301.0MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 8399.24ms. Allocated memory was 367.0MB in the beginning and 578.8MB in the end (delta: 211.8MB). Free memory was 300.5MB in the beginning and 284.6MB in the end (delta: 15.9MB). Peak memory consumption was 230.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 102 PlacesBefore, 41 PlacesAfterwards, 90 TransitionsBefore, 28 TransitionsAfterwards, 1766 CoEnabledTransitionPairs, 5 FixpointIterations, 27 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 1 ChoiceCompositions, 92 TotalNumberOfCompositions, 3202 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1668, independent: 1588, independent conditional: 0, independent unconditional: 1588, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 906, independent: 877, independent conditional: 0, independent unconditional: 877, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1668, independent: 711, independent conditional: 0, independent unconditional: 711, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 906, unknown conditional: 0, unknown unconditional: 906] , Statistics on independence cache: Total cache size (in pairs): 55, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 138 locations, 13 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.3s, OverallIterations: 14, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 300 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 300 mSDsluCounter, 41 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 805 IncrementalHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 21 mSDtfsCounter, 805 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=575occurred in iteration=10, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 187 NumberOfCodeBlocks, 187 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 822 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:19:32,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...