/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/safe013_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:18:35,843 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:18:35,923 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 15:18:35,927 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:18:35,928 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:18:35,955 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:18:35,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:18:35,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:18:35,957 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:18:35,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:18:35,961 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:18:35,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:18:35,962 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:18:35,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:18:35,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:18:35,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:18:35,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:18:35,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:18:35,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:18:35,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:18:35,965 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:18:35,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:18:35,966 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:18:35,966 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:18:35,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:18:35,967 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:18:35,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:18:35,967 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:18:35,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:18:35,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:18:35,969 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:18:35,969 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:18:35,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:18:35,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:18:35,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:18:35,970 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:18:36,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:18:36,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:18:36,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:18:36,303 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:18:36,304 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:18:36,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2023-08-26 15:18:37,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:18:37,872 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:18:37,873 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2023-08-26 15:18:37,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e4a8a90/750245b270a54e768f7874829d84557e/FLAG669d17c4b [2023-08-26 15:18:37,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75e4a8a90/750245b270a54e768f7874829d84557e [2023-08-26 15:18:37,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:18:37,916 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:18:37,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:18:37,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:18:37,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:18:37,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:18:37" (1/1) ... [2023-08-26 15:18:37,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569d4869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:37, skipping insertion in model container [2023-08-26 15:18:37,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:18:37" (1/1) ... [2023-08-26 15:18:37,974 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:18:38,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:18:38,311 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:18:38,333 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:18:38,335 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:18:38,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:18:38,382 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:18:38,382 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:18:38,388 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:18:38,389 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38 WrapperNode [2023-08-26 15:18:38,389 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:18:38,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:18:38,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:18:38,390 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:18:38,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,447 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 15:18:38,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:18:38,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:18:38,449 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:18:38,449 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:18:38,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,462 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,468 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:18:38,469 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:18:38,469 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:18:38,469 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:18:38,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (1/1) ... [2023-08-26 15:18:38,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:18:38,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:18:38,504 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 15:18:38,511 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 15:18:38,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:18:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:18:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:18:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:18:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:18:38,535 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:18:38,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:18:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:18:38,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:18:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:18:38,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:18:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:18:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:18:38,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:18:38,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:18:38,539 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 15:18:38,681 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:18:38,682 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:18:38,929 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:18:38,935 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:18:38,936 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:18:38,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:18:38 BoogieIcfgContainer [2023-08-26 15:18:38,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:18:38,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:18:38,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:18:38,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:18:38,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:18:37" (1/3) ... [2023-08-26 15:18:38,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19045e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:18:38, skipping insertion in model container [2023-08-26 15:18:38,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:18:38" (2/3) ... [2023-08-26 15:18:38,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19045e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:18:38, skipping insertion in model container [2023-08-26 15:18:38,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:18:38" (3/3) ... [2023-08-26 15:18:38,949 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2023-08-26 15:18:38,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:18:38,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 15:18:38,969 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:18:39,037 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:18:39,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 15:18:39,146 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 15:18:39,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:18:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 3/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 76 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 15:18:39,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 15:18:39,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 15:18:39,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:18:39,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 15:18:39,177 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 15:18:39,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 15:18:39,192 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 15:18:39,192 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:18:39,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 78 events. 1/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 15:18:39,194 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 15:18:41,376 INFO L134 LiptonReduction]: Checked pairs total: 2448 [2023-08-26 15:18:41,376 INFO L136 LiptonReduction]: Total number of compositions: 71 [2023-08-26 15:18:41,387 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:18:41,392 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;@6e687b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:18:41,393 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 15:18:41,394 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:18:41,394 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:18:41,394 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:18:41,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:41,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:18:41,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:41,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:41,399 INFO L85 PathProgramCache]: Analyzing trace with hash 323, now seen corresponding path program 1 times [2023-08-26 15:18:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5529245] [2023-08-26 15:18:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:41,486 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 15:18:41,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:41,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5529245] [2023-08-26 15:18:41,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5529245] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:41,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:41,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:18:41,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584213225] [2023-08-26 15:18:41,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:41,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:18:41,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:18:41,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:18:41,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 166 [2023-08-26 15:18:41,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 24 transitions, 57 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:41,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:41,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 166 [2023-08-26 15:18:41,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:41,584 INFO L124 PetriNetUnfolderBase]: 164/293 cut-off events. [2023-08-26 15:18:41,584 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:18:41,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 293 events. 164/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1206 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 583. Up to 271 conditions per place. [2023-08-26 15:18:41,588 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 15:18:41,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 15:18:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:18:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:18:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 197 transitions. [2023-08-26 15:18:41,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933734939759037 [2023-08-26 15:18:41,603 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 197 transitions. [2023-08-26 15:18:41,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 197 transitions. [2023-08-26 15:18:41,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:41,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 197 transitions. [2023-08-26 15:18:41,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.5) internal successors, (197), 2 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:41,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:41,617 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:41,619 INFO L175 Difference]: Start difference. First operand has 33 places, 24 transitions, 57 flow. Second operand 2 states and 197 transitions. [2023-08-26 15:18:41,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 15:18:41,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:18:41,623 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 15:18:41,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 15:18:41,627 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 15:18:41,628 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 15:18:41,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:41,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:41,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:41,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:18:41,629 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:41,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 294190685, now seen corresponding path program 1 times [2023-08-26 15:18:41,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:41,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912724147] [2023-08-26 15:18:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:41,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:42,045 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 15:18:42,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:42,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912724147] [2023-08-26 15:18:42,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912724147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:42,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:42,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:18:42,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103196478] [2023-08-26 15:18:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:42,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:18:42,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:42,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:18:42,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:18:42,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 166 [2023-08-26 15:18:42,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:42,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 166 [2023-08-26 15:18:42,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:42,150 INFO L124 PetriNetUnfolderBase]: 354/583 cut-off events. [2023-08-26 15:18:42,150 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:18:42,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 583 events. 354/583 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2696 event pairs, 129 based on Foata normal form. 27/609 useless extension candidates. Maximal degree in co-relation 1199. Up to 400 conditions per place. [2023-08-26 15:18:42,155 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 23 selfloop transitions, 5 changer transitions 0/29 dead transitions. [2023-08-26 15:18:42,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 29 transitions, 124 flow [2023-08-26 15:18:42,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:18:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:18:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 15:18:42,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5401606425702812 [2023-08-26 15:18:42,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 15:18:42,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 15:18:42,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:42,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 15:18:42,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,167 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 269 transitions. [2023-08-26 15:18:42,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 29 transitions, 124 flow [2023-08-26 15:18:42,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 29 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:18:42,171 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 69 flow [2023-08-26 15:18:42,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-26 15:18:42,172 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 15:18:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 69 flow [2023-08-26 15:18:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:42,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:42,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:18:42,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:42,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:42,181 INFO L85 PathProgramCache]: Analyzing trace with hash 529976086, now seen corresponding path program 1 times [2023-08-26 15:18:42,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:42,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634369327] [2023-08-26 15:18:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:42,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:42,416 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 15:18:42,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:42,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634369327] [2023-08-26 15:18:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634369327] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:42,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:42,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:42,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421469060] [2023-08-26 15:18:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:42,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:42,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:42,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:42,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:42,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 166 [2023-08-26 15:18:42,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:42,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 166 [2023-08-26 15:18:42,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:42,490 INFO L124 PetriNetUnfolderBase]: 333/556 cut-off events. [2023-08-26 15:18:42,490 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-08-26 15:18:42,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 556 events. 333/556 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2409 event pairs, 81 based on Foata normal form. 9/561 useless extension candidates. Maximal degree in co-relation 1389. Up to 271 conditions per place. [2023-08-26 15:18:42,494 INFO L140 encePairwiseOnDemand]: 160/166 looper letters, 24 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 15:18:42,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 156 flow [2023-08-26 15:18:42,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:18:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:18:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-08-26 15:18:42,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271084337349398 [2023-08-26 15:18:42,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-08-26 15:18:42,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-08-26 15:18:42,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:42,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-08-26 15:18:42,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,499 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,499 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 69 flow. Second operand 4 states and 350 transitions. [2023-08-26 15:18:42,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 156 flow [2023-08-26 15:18:42,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:18:42,502 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 90 flow [2023-08-26 15:18:42,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-26 15:18:42,503 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-26 15:18:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 90 flow [2023-08-26 15:18:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:18:42,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:42,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash 529976024, now seen corresponding path program 1 times [2023-08-26 15:18:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854058600] [2023-08-26 15:18:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:42,640 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 15:18:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854058600] [2023-08-26 15:18:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854058600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:42,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902296246] [2023-08-26 15:18:42,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:42,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:42,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:42,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:42,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 166 [2023-08-26 15:18:42,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:42,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 166 [2023-08-26 15:18:42,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:42,736 INFO L124 PetriNetUnfolderBase]: 318/529 cut-off events. [2023-08-26 15:18:42,736 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2023-08-26 15:18:42,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 529 events. 318/529 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2269 event pairs, 74 based on Foata normal form. 3/531 useless extension candidates. Maximal degree in co-relation 1450. Up to 343 conditions per place. [2023-08-26 15:18:42,740 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 26 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-08-26 15:18:42,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 191 flow [2023-08-26 15:18:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:18:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:18:42,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2023-08-26 15:18:42,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316265060240963 [2023-08-26 15:18:42,742 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 353 transitions. [2023-08-26 15:18:42,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 353 transitions. [2023-08-26 15:18:42,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:42,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 353 transitions. [2023-08-26 15:18:42,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,762 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,762 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 90 flow. Second operand 4 states and 353 transitions. [2023-08-26 15:18:42,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 191 flow [2023-08-26 15:18:42,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:18:42,767 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 107 flow [2023-08-26 15:18:42,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-26 15:18:42,769 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-26 15:18:42,769 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 107 flow [2023-08-26 15:18:42,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:42,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:42,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:18:42,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:42,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:42,770 INFO L85 PathProgramCache]: Analyzing trace with hash -750611137, now seen corresponding path program 1 times [2023-08-26 15:18:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:42,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174687943] [2023-08-26 15:18:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:42,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:18:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:42,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174687943] [2023-08-26 15:18:42,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174687943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:42,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:42,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128586487] [2023-08-26 15:18:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:42,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 166 [2023-08-26 15:18:42,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:42,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:42,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 166 [2023-08-26 15:18:42,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:42,997 INFO L124 PetriNetUnfolderBase]: 498/803 cut-off events. [2023-08-26 15:18:42,997 INFO L125 PetriNetUnfolderBase]: For 745/745 co-relation queries the response was YES. [2023-08-26 15:18:42,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2348 conditions, 803 events. 498/803 cut-off events. For 745/745 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3367 event pairs, 75 based on Foata normal form. 12/815 useless extension candidates. Maximal degree in co-relation 2340. Up to 263 conditions per place. [2023-08-26 15:18:43,002 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 40 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-08-26 15:18:43,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 58 transitions, 382 flow [2023-08-26 15:18:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:43,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 441 transitions. [2023-08-26 15:18:43,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5313253012048192 [2023-08-26 15:18:43,005 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 441 transitions. [2023-08-26 15:18:43,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 441 transitions. [2023-08-26 15:18:43,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 441 transitions. [2023-08-26 15:18:43,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,008 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,008 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 107 flow. Second operand 5 states and 441 transitions. [2023-08-26 15:18:43,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 58 transitions, 382 flow [2023-08-26 15:18:43,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 58 transitions, 356 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 15:18:43,012 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 261 flow [2023-08-26 15:18:43,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=261, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-26 15:18:43,013 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 15:18:43,013 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 261 flow [2023-08-26 15:18:43,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:43,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:18:43,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:43,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:43,015 INFO L85 PathProgramCache]: Analyzing trace with hash -750612997, now seen corresponding path program 2 times [2023-08-26 15:18:43,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:43,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152998999] [2023-08-26 15:18:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:43,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:43,116 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 15:18:43,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:43,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152998999] [2023-08-26 15:18:43,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152998999] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:43,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:43,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:18:43,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168009722] [2023-08-26 15:18:43,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:43,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:18:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:43,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:18:43,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:18:43,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 166 [2023-08-26 15:18:43,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:43,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 166 [2023-08-26 15:18:43,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:43,234 INFO L124 PetriNetUnfolderBase]: 530/873 cut-off events. [2023-08-26 15:18:43,235 INFO L125 PetriNetUnfolderBase]: For 1652/1652 co-relation queries the response was YES. [2023-08-26 15:18:43,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2995 conditions, 873 events. 530/873 cut-off events. For 1652/1652 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3807 event pairs, 167 based on Foata normal form. 36/909 useless extension candidates. Maximal degree in co-relation 2984. Up to 322 conditions per place. [2023-08-26 15:18:43,240 INFO L140 encePairwiseOnDemand]: 159/166 looper letters, 28 selfloop transitions, 9 changer transitions 18/55 dead transitions. [2023-08-26 15:18:43,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 464 flow [2023-08-26 15:18:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 431 transitions. [2023-08-26 15:18:43,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519277108433735 [2023-08-26 15:18:43,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 431 transitions. [2023-08-26 15:18:43,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 431 transitions. [2023-08-26 15:18:43,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 431 transitions. [2023-08-26 15:18:43,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.2) internal successors, (431), 5 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,245 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 261 flow. Second operand 5 states and 431 transitions. [2023-08-26 15:18:43,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 464 flow [2023-08-26 15:18:43,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:18:43,250 INFO L231 Difference]: Finished difference. Result has 46 places, 24 transitions, 187 flow [2023-08-26 15:18:43,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=46, PETRI_TRANSITIONS=24} [2023-08-26 15:18:43,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2023-08-26 15:18:43,251 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 24 transitions, 187 flow [2023-08-26 15:18:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:43,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:18:43,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:43,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1244857882, now seen corresponding path program 1 times [2023-08-26 15:18:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:43,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063947692] [2023-08-26 15:18:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:43,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:43,335 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 15:18:43,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:43,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063947692] [2023-08-26 15:18:43,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063947692] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:43,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:43,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:18:43,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643696246] [2023-08-26 15:18:43,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:43,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:18:43,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:43,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:18:43,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:18:43,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 166 [2023-08-26 15:18:43,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 24 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:43,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 166 [2023-08-26 15:18:43,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:43,396 INFO L124 PetriNetUnfolderBase]: 136/264 cut-off events. [2023-08-26 15:18:43,397 INFO L125 PetriNetUnfolderBase]: For 747/756 co-relation queries the response was YES. [2023-08-26 15:18:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 264 events. 136/264 cut-off events. For 747/756 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1024 event pairs, 42 based on Foata normal form. 11/262 useless extension candidates. Maximal degree in co-relation 982. Up to 197 conditions per place. [2023-08-26 15:18:43,399 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 27 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-26 15:18:43,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 323 flow [2023-08-26 15:18:43,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:18:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:18:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-26 15:18:43,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502008032128514 [2023-08-26 15:18:43,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-26 15:18:43,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-26 15:18:43,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-26 15:18:43,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,403 INFO L175 Difference]: Start difference. First operand has 46 places, 24 transitions, 187 flow. Second operand 3 states and 274 transitions. [2023-08-26 15:18:43,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 323 flow [2023-08-26 15:18:43,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 243 flow, removed 8 selfloop flow, removed 10 redundant places. [2023-08-26 15:18:43,406 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 150 flow [2023-08-26 15:18:43,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-26 15:18:43,407 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 15:18:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 150 flow [2023-08-26 15:18:43,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:43,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:18:43,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:43,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:43,408 INFO L85 PathProgramCache]: Analyzing trace with hash 332187860, now seen corresponding path program 1 times [2023-08-26 15:18:43,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:43,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676256728] [2023-08-26 15:18:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:43,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:43,502 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 15:18:43,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:43,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676256728] [2023-08-26 15:18:43,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676256728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:43,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:43,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:18:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436562237] [2023-08-26 15:18:43,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:43,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:43,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:43,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 166 [2023-08-26 15:18:43,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:43,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 166 [2023-08-26 15:18:43,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:43,590 INFO L124 PetriNetUnfolderBase]: 169/353 cut-off events. [2023-08-26 15:18:43,590 INFO L125 PetriNetUnfolderBase]: For 329/343 co-relation queries the response was YES. [2023-08-26 15:18:43,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 353 events. 169/353 cut-off events. For 329/343 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1555 event pairs, 40 based on Foata normal form. 10/355 useless extension candidates. Maximal degree in co-relation 1212. Up to 181 conditions per place. [2023-08-26 15:18:43,592 INFO L140 encePairwiseOnDemand]: 163/166 looper letters, 29 selfloop transitions, 3 changer transitions 7/43 dead transitions. [2023-08-26 15:18:43,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 298 flow [2023-08-26 15:18:43,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:18:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:18:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 361 transitions. [2023-08-26 15:18:43,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436746987951807 [2023-08-26 15:18:43,594 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 361 transitions. [2023-08-26 15:18:43,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 361 transitions. [2023-08-26 15:18:43,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 361 transitions. [2023-08-26 15:18:43,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.25) internal successors, (361), 4 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,597 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 150 flow. Second operand 4 states and 361 transitions. [2023-08-26 15:18:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 298 flow [2023-08-26 15:18:43,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:18:43,599 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 165 flow [2023-08-26 15:18:43,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-26 15:18:43,600 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-26 15:18:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 165 flow [2023-08-26 15:18:43,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.25) internal successors, (345), 4 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:43,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:18:43,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:43,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1534545626, now seen corresponding path program 1 times [2023-08-26 15:18:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:43,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476160869] [2023-08-26 15:18:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:43,704 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 15:18:43,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:43,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476160869] [2023-08-26 15:18:43,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476160869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:43,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:43,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:18:43,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940423817] [2023-08-26 15:18:43,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:43,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:18:43,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:43,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:18:43,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:18:43,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 166 [2023-08-26 15:18:43,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 165 flow. Second operand has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:43,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 166 [2023-08-26 15:18:43,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:43,770 INFO L124 PetriNetUnfolderBase]: 99/220 cut-off events. [2023-08-26 15:18:43,770 INFO L125 PetriNetUnfolderBase]: For 237/272 co-relation queries the response was YES. [2023-08-26 15:18:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 220 events. 99/220 cut-off events. For 237/272 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 870 event pairs, 17 based on Foata normal form. 36/244 useless extension candidates. Maximal degree in co-relation 758. Up to 112 conditions per place. [2023-08-26 15:18:43,772 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 26 selfloop transitions, 7 changer transitions 6/45 dead transitions. [2023-08-26 15:18:43,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 326 flow [2023-08-26 15:18:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:18:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:18:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2023-08-26 15:18:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481927710843374 [2023-08-26 15:18:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 364 transitions. [2023-08-26 15:18:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 364 transitions. [2023-08-26 15:18:43,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 364 transitions. [2023-08-26 15:18:43,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,777 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 165 flow. Second operand 4 states and 364 transitions. [2023-08-26 15:18:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 326 flow [2023-08-26 15:18:43,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 315 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 15:18:43,779 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 165 flow [2023-08-26 15:18:43,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-26 15:18:43,780 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-26 15:18:43,780 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 165 flow [2023-08-26 15:18:43,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.0) internal successors, (344), 4 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:18:43,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:18:43,781 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:18:43,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:18:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash -290351771, now seen corresponding path program 1 times [2023-08-26 15:18:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:18:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956096154] [2023-08-26 15:18:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:18:43,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:18:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:18:43,931 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 15:18:43,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:18:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956096154] [2023-08-26 15:18:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956096154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:18:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:18:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:18:43,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376408891] [2023-08-26 15:18:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:18:43,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:18:43,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:18:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:18:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:18:43,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 166 [2023-08-26 15:18:43,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:18:43,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 166 [2023-08-26 15:18:43,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:18:43,984 INFO L124 PetriNetUnfolderBase]: 67/166 cut-off events. [2023-08-26 15:18:43,984 INFO L125 PetriNetUnfolderBase]: For 331/378 co-relation queries the response was YES. [2023-08-26 15:18:43,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 671 conditions, 166 events. 67/166 cut-off events. For 331/378 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 655 event pairs, 14 based on Foata normal form. 34/190 useless extension candidates. Maximal degree in co-relation 659. Up to 78 conditions per place. [2023-08-26 15:18:43,985 INFO L140 encePairwiseOnDemand]: 161/166 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2023-08-26 15:18:43,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 276 flow [2023-08-26 15:18:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:18:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:18:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2023-08-26 15:18:43,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536144578313253 [2023-08-26 15:18:43,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 445 transitions. [2023-08-26 15:18:43,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 445 transitions. [2023-08-26 15:18:43,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:18:43,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 445 transitions. [2023-08-26 15:18:43,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 166.0) internal successors, (996), 6 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,990 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 165 flow. Second operand 5 states and 445 transitions. [2023-08-26 15:18:43,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 38 transitions, 276 flow [2023-08-26 15:18:43,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 246 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 15:18:43,992 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-26 15:18:43,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-26 15:18:43,993 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-26 15:18:43,993 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-26 15:18:43,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:18:43,995 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 15:18:43,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 15:18:43,997 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 15:18:43,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:18:43,997 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:18:43,999 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:18:44,000 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:18:44,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:18:44 BasicIcfg [2023-08-26 15:18:44,002 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:18:44,003 INFO L158 Benchmark]: Toolchain (without parser) took 6087.27ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 334.1MB in the beginning and 343.7MB in the end (delta: -9.6MB). Peak memory consumption was 67.0MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,003 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 358.6MB. Free memory is still 335.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:18:44,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.41ms. Allocated memory is still 358.6MB. Free memory was 333.7MB in the beginning and 313.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.62ms. Allocated memory is still 358.6MB. Free memory was 313.9MB in the beginning and 311.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,004 INFO L158 Benchmark]: Boogie Preprocessor took 19.67ms. Allocated memory is still 358.6MB. Free memory was 311.8MB in the beginning and 310.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,004 INFO L158 Benchmark]: RCFGBuilder took 471.16ms. Allocated memory is still 358.6MB. Free memory was 310.1MB in the beginning and 295.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,004 INFO L158 Benchmark]: TraceAbstraction took 5059.92ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 294.6MB in the beginning and 343.7MB in the end (delta: -49.1MB). Peak memory consumption was 27.1MB. Max. memory is 16.0GB. [2023-08-26 15:18:44,005 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 358.6MB. Free memory is still 335.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 469.41ms. Allocated memory is still 358.6MB. Free memory was 333.7MB in the beginning and 313.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.62ms. Allocated memory is still 358.6MB. Free memory was 313.9MB in the beginning and 311.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.67ms. Allocated memory is still 358.6MB. Free memory was 311.8MB in the beginning and 310.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 471.16ms. Allocated memory is still 358.6MB. Free memory was 310.1MB in the beginning and 295.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5059.92ms. Allocated memory was 358.6MB in the beginning and 432.0MB in the end (delta: 73.4MB). Free memory was 294.6MB in the beginning and 343.7MB in the end (delta: -49.1MB). Peak memory consumption was 27.1MB. 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: 2.2s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 24 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 26 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 71 TotalNumberOfCompositions, 2448 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1353, independent: 1268, independent conditional: 0, independent unconditional: 1268, dependent: 85, dependent conditional: 0, dependent unconditional: 85, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 668, independent: 639, independent conditional: 0, independent unconditional: 639, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1353, independent: 629, independent conditional: 0, independent unconditional: 629, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 668, unknown conditional: 0, unknown unconditional: 668] , Statistics on independence cache: Total cache size (in pairs): 70, Positive cache size: 61, Positive conditional cache size: 0, Positive unconditional cache size: 61, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, 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: 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 7 procedures, 117 locations, 10 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: 4.9s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 120 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 366 IncrementalHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 16 mSDtfsCounter, 366 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=261occurred in iteration=5, InterpolantAutomatonStates: 39, 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, 1.2s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 363 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:18:44,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...