/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 PROGRAM_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/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:22:28,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:22:29,013 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 18:22:29,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:22:29,022 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:22:29,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:22:29,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:22:29,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:22:29,054 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:22:29,058 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:22:29,058 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:22:29,058 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:22:29,059 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:22:29,060 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:22:29,060 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:22:29,060 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:22:29,061 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:22:29,061 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:22:29,061 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:22:29,061 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:22:29,061 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:22:29,062 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:22:29,062 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:22:29,063 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:22:29,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:22:29,063 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:22:29,063 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:22:29,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:29,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:22:29,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:22:29,065 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:22:29,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:22:29,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:22:29,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:22:29,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:22:29,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:22:29,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:22:29,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:22:29,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:22:29,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:22:29,412 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:22:29,414 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:22:30,628 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:22:30,851 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:22:30,851 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:22:30,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1af6b31c9/7b90b1b319ce4666b00bd083d2a402c6/FLAG0bc134a47 [2023-08-26 18:22:30,883 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1af6b31c9/7b90b1b319ce4666b00bd083d2a402c6 [2023-08-26 18:22:30,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:22:30,886 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:22:30,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:30,887 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:22:30,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:22:30,890 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:30" (1/1) ... [2023-08-26 18:22:30,891 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5301be8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:30, skipping insertion in model container [2023-08-26 18:22:30,891 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:30" (1/1) ... [2023-08-26 18:22:30,933 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:22:31,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:31,290 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:22:31,321 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:31,322 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:31,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:31,384 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:31,384 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:31,390 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:22:31,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31 WrapperNode [2023-08-26 18:22:31,391 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:31,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:31,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:22:31,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:22:31,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,420 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,448 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2023-08-26 18:22:31,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:31,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:22:31,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:22:31,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:22:31,459 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,485 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,489 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:22:31,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:22:31,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:22:31,490 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:22:31,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (1/1) ... [2023-08-26 18:22:31,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:31,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:22:31,534 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 18:22:31,541 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 18:22:31,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:22:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:22:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:22:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:22:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:22:31,596 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:22:31,596 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:22:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:22:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:22:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:22:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:22:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:22:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:22:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:22:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:22:31,600 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 18:22:31,755 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:22:31,757 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:22:31,985 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:22:31,991 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:22:31,991 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:22:31,993 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:31 BoogieIcfgContainer [2023-08-26 18:22:31,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:22:31,995 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:22:31,995 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:22:31,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:22:32,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:22:30" (1/3) ... [2023-08-26 18:22:32,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5caf99ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:32, skipping insertion in model container [2023-08-26 18:22:32,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:31" (2/3) ... [2023-08-26 18:22:32,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5caf99ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:32, skipping insertion in model container [2023-08-26 18:22:32,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:31" (3/3) ... [2023-08-26 18:22:32,003 INFO L112 eAbstractionObserver]: Analyzing ICFG safe009_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2023-08-26 18:22:32,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:22:32,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:22:32,019 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:22:32,096 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:22:32,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 93 transitions, 201 flow [2023-08-26 18:22:32,181 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-08-26 18:22:32,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:32,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 90 events. 3/90 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. 0/80 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-26 18:22:32,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 93 transitions, 201 flow [2023-08-26 18:22:32,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 76 transitions, 161 flow [2023-08-26 18:22:32,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:22:32,207 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 76 transitions, 161 flow [2023-08-26 18:22:32,210 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 76 transitions, 161 flow [2023-08-26 18:22:32,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 76 transitions, 161 flow [2023-08-26 18:22:32,240 INFO L124 PetriNetUnfolderBase]: 1/76 cut-off events. [2023-08-26 18:22:32,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 76 events. 1/76 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. 0/69 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2023-08-26 18:22:32,243 INFO L119 LiptonReduction]: Number of co-enabled transitions 1128 [2023-08-26 18:22:34,653 INFO L134 LiptonReduction]: Checked pairs total: 2066 [2023-08-26 18:22:34,653 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-26 18:22:34,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:22:34,669 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;@6d0e9c50, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:22:34,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:22:34,671 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:22:34,671 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:22:34,671 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:34,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:34,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:22:34,672 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 18:22:34,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 325, now seen corresponding path program 1 times [2023-08-26 18:22:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:34,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638038080] [2023-08-26 18:22:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:34,775 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 18:22:34,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638038080] [2023-08-26 18:22:34,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638038080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:34,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:34,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:22:34,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799090337] [2023-08-26 18:22:34,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:22:34,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:22:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:22:34,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 169 [2023-08-26 18:22:34,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:34,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:34,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 169 [2023-08-26 18:22:34,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:34,875 INFO L124 PetriNetUnfolderBase]: 164/275 cut-off events. [2023-08-26 18:22:34,876 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:22:34,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 275 events. 164/275 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1044 event pairs, 164 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 565. Up to 271 conditions per place. [2023-08-26 18:22:34,879 INFO L140 encePairwiseOnDemand]: 162/169 looper letters, 14 selfloop transitions, 0 changer transitions 0/16 dead transitions. [2023-08-26 18:22:34,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 16 transitions, 69 flow [2023-08-26 18:22:34,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:22:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:22:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2023-08-26 18:22:34,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710059171597633 [2023-08-26 18:22:34,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2023-08-26 18:22:34,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2023-08-26 18:22:34,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:34,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2023-08-26 18:22:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:34,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:34,903 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:34,905 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 55 flow. Second operand 2 states and 193 transitions. [2023-08-26 18:22:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 16 transitions, 69 flow [2023-08-26 18:22:34,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:22:34,909 INFO L231 Difference]: Finished difference. Result has 24 places, 16 transitions, 38 flow [2023-08-26 18:22:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=24, PETRI_TRANSITIONS=16} [2023-08-26 18:22:34,914 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -8 predicate places. [2023-08-26 18:22:34,914 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 16 transitions, 38 flow [2023-08-26 18:22:34,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:34,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:34,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:22:34,915 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 18:22:34,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash 175378234, now seen corresponding path program 1 times [2023-08-26 18:22:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650178385] [2023-08-26 18:22:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:34,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:35,287 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 18:22:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650178385] [2023-08-26 18:22:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650178385] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:35,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:35,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:22:35,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606470859] [2023-08-26 18:22:35,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:35,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:35,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:35,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:35,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:35,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 169 [2023-08-26 18:22:35,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:35,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 169 [2023-08-26 18:22:35,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:35,356 INFO L124 PetriNetUnfolderBase]: 143/259 cut-off events. [2023-08-26 18:22:35,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:35,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 259 events. 143/259 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1015 event pairs, 43 based on Foata normal form. 9/267 useless extension candidates. Maximal degree in co-relation 525. Up to 194 conditions per place. [2023-08-26 18:22:35,359 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 21 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-26 18:22:35,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 25 transitions, 106 flow [2023-08-26 18:22:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-26 18:22:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2023-08-26 18:22:35,363 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-26 18:22:35,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-26 18:22:35,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:35,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-26 18:22:35,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,367 INFO L175 Difference]: Start difference. First operand has 24 places, 16 transitions, 38 flow. Second operand 3 states and 273 transitions. [2023-08-26 18:22:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 25 transitions, 106 flow [2023-08-26 18:22:35,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:22:35,368 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 46 flow [2023-08-26 18:22:35,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-08-26 18:22:35,369 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-26 18:22:35,369 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 46 flow [2023-08-26 18:22:35,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:35,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:35,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:22:35,370 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 18:22:35,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1141757189, now seen corresponding path program 1 times [2023-08-26 18:22:35,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:35,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530977070] [2023-08-26 18:22:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:35,556 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 18:22:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530977070] [2023-08-26 18:22:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530977070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:35,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:35,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:35,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900472951] [2023-08-26 18:22:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:35,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:35,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-26 18:22:35,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-26 18:22:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:35,638 INFO L124 PetriNetUnfolderBase]: 241/422 cut-off events. [2023-08-26 18:22:35,638 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 18:22:35,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 422 events. 241/422 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1837 event pairs, 37 based on Foata normal form. 16/437 useless extension candidates. Maximal degree in co-relation 979. Up to 233 conditions per place. [2023-08-26 18:22:35,642 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 25 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-08-26 18:22:35,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 150 flow [2023-08-26 18:22:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 345 transitions. [2023-08-26 18:22:35,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103550295857988 [2023-08-26 18:22:35,645 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 345 transitions. [2023-08-26 18:22:35,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 345 transitions. [2023-08-26 18:22:35,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:35,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 345 transitions. [2023-08-26 18:22:35,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 18:22:35,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,650 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 46 flow. Second operand 4 states and 345 transitions. [2023-08-26 18:22:35,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 150 flow [2023-08-26 18:22:35,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:35,651 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 78 flow [2023-08-26 18:22:35,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 18:22:35,652 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -2 predicate places. [2023-08-26 18:22:35,652 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 78 flow [2023-08-26 18:22:35,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:35,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:35,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:22:35,653 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 18:22:35,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:35,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2001306099, now seen corresponding path program 1 times [2023-08-26 18:22:35,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:35,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865761393] [2023-08-26 18:22:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:35,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:35,794 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 18:22:35,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:35,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865761393] [2023-08-26 18:22:35,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865761393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:35,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:35,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:35,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806380110] [2023-08-26 18:22:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:35,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:35,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:35,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:35,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-26 18:22:35,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 78 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 18:22:35,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:35,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-26 18:22:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:35,919 INFO L124 PetriNetUnfolderBase]: 297/534 cut-off events. [2023-08-26 18:22:35,919 INFO L125 PetriNetUnfolderBase]: For 285/285 co-relation queries the response was YES. [2023-08-26 18:22:35,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1366 conditions, 534 events. 297/534 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2589 event pairs, 77 based on Foata normal form. 16/549 useless extension candidates. Maximal degree in co-relation 1359. Up to 218 conditions per place. [2023-08-26 18:22:35,924 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 27 selfloop transitions, 6 changer transitions 4/38 dead transitions. [2023-08-26 18:22:35,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 38 transitions, 198 flow [2023-08-26 18:22:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 427 transitions. [2023-08-26 18:22:35,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053254437869823 [2023-08-26 18:22:35,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 427 transitions. [2023-08-26 18:22:35,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 427 transitions. [2023-08-26 18:22:35,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:35,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 427 transitions. [2023-08-26 18:22:35,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,932 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:35,932 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 78 flow. Second operand 5 states and 427 transitions. [2023-08-26 18:22:35,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 38 transitions, 198 flow [2023-08-26 18:22:35,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:22:35,935 INFO L231 Difference]: Finished difference. Result has 36 places, 21 transitions, 107 flow [2023-08-26 18:22:35,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=5, PETRI_FLOW=107, PETRI_PLACES=36, PETRI_TRANSITIONS=21} [2023-08-26 18:22:35,937 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-26 18:22:35,937 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 21 transitions, 107 flow [2023-08-26 18:22:35,938 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 18:22:35,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:35,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:22:35,939 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 18:22:35,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1034732761, now seen corresponding path program 2 times [2023-08-26 18:22:35,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217311206] [2023-08-26 18:22:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:36,073 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 18:22:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:36,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217311206] [2023-08-26 18:22:36,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217311206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:36,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:36,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:22:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141545850] [2023-08-26 18:22:36,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:36,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:36,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:36,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:36,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 169 [2023-08-26 18:22:36,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 21 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:36,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 169 [2023-08-26 18:22:36,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:36,136 INFO L124 PetriNetUnfolderBase]: 150/289 cut-off events. [2023-08-26 18:22:36,136 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2023-08-26 18:22:36,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 289 events. 150/289 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1226 event pairs, 66 based on Foata normal form. 4/293 useless extension candidates. Maximal degree in co-relation 855. Up to 233 conditions per place. [2023-08-26 18:22:36,138 INFO L140 encePairwiseOnDemand]: 166/169 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-26 18:22:36,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 184 flow [2023-08-26 18:22:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-26 18:22:36,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534516765285996 [2023-08-26 18:22:36,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-26 18:22:36,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-26 18:22:36,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:36,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-26 18:22:36,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,144 INFO L175 Difference]: Start difference. First operand has 36 places, 21 transitions, 107 flow. Second operand 3 states and 271 transitions. [2023-08-26 18:22:36,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 184 flow [2023-08-26 18:22:36,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 162 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:22:36,149 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 98 flow [2023-08-26 18:22:36,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-08-26 18:22:36,151 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-26 18:22:36,151 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 98 flow [2023-08-26 18:22:36,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:36,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:36,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:22:36,153 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 18:22:36,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:36,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2011392136, now seen corresponding path program 1 times [2023-08-26 18:22:36,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:36,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410679411] [2023-08-26 18:22:36,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:36,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:36,281 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 18:22:36,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:36,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410679411] [2023-08-26 18:22:36,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410679411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:36,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:36,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:36,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722863466] [2023-08-26 18:22:36,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:36,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:36,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:36,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:36,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:36,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 169 [2023-08-26 18:22:36,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:36,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 169 [2023-08-26 18:22:36,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:36,370 INFO L124 PetriNetUnfolderBase]: 235/410 cut-off events. [2023-08-26 18:22:36,370 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-08-26 18:22:36,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 410 events. 235/410 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1600 event pairs, 71 based on Foata normal form. 24/434 useless extension candidates. Maximal degree in co-relation 1126. Up to 164 conditions per place. [2023-08-26 18:22:36,372 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 19 selfloop transitions, 4 changer transitions 14/37 dead transitions. [2023-08-26 18:22:36,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 223 flow [2023-08-26 18:22:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 414 transitions. [2023-08-26 18:22:36,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48994082840236686 [2023-08-26 18:22:36,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 414 transitions. [2023-08-26 18:22:36,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 414 transitions. [2023-08-26 18:22:36,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:36,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 414 transitions. [2023-08-26 18:22:36,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,378 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 98 flow. Second operand 5 states and 414 transitions. [2023-08-26 18:22:36,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 223 flow [2023-08-26 18:22:36,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 217 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:36,383 INFO L231 Difference]: Finished difference. Result has 39 places, 16 transitions, 80 flow [2023-08-26 18:22:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=16} [2023-08-26 18:22:36,385 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-26 18:22:36,388 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 16 transitions, 80 flow [2023-08-26 18:22:36,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:36,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:22:36,389 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 18:22:36,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1492609836, now seen corresponding path program 1 times [2023-08-26 18:22:36,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:36,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609117315] [2023-08-26 18:22:36,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:36,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:36,510 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 18:22:36,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:36,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609117315] [2023-08-26 18:22:36,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609117315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:36,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:36,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:36,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491692717] [2023-08-26 18:22:36,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:36,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:36,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:36,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:36,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:36,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:36,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 16 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:36,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:36,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:36,541 INFO L124 PetriNetUnfolderBase]: 29/77 cut-off events. [2023-08-26 18:22:36,541 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-26 18:22:36,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 77 events. 29/77 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 202 event pairs, 13 based on Foata normal form. 4/81 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2023-08-26 18:22:36,542 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 15 selfloop transitions, 3 changer transitions 1/21 dead transitions. [2023-08-26 18:22:36,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 21 transitions, 137 flow [2023-08-26 18:22:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-26 18:22:36,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187376725838264 [2023-08-26 18:22:36,543 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-26 18:22:36,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-26 18:22:36,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:36,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-26 18:22:36,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,546 INFO L175 Difference]: Start difference. First operand has 39 places, 16 transitions, 80 flow. Second operand 3 states and 263 transitions. [2023-08-26 18:22:36,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 21 transitions, 137 flow [2023-08-26 18:22:36,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 97 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-26 18:22:36,547 INFO L231 Difference]: Finished difference. Result has 32 places, 18 transitions, 69 flow [2023-08-26 18:22:36,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2023-08-26 18:22:36,548 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-26 18:22:36,548 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 69 flow [2023-08-26 18:22:36,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:36,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:36,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:22:36,549 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 18:22:36,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:36,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1764853970, now seen corresponding path program 1 times [2023-08-26 18:22:36,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:36,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510176063] [2023-08-26 18:22:36,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:36,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:36,643 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 18:22:36,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:36,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510176063] [2023-08-26 18:22:36,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510176063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:36,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:36,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874631106] [2023-08-26 18:22:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:36,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:36,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:36,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:36,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:36,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:36,672 INFO L124 PetriNetUnfolderBase]: 12/43 cut-off events. [2023-08-26 18:22:36,672 INFO L125 PetriNetUnfolderBase]: For 14/18 co-relation queries the response was YES. [2023-08-26 18:22:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 43 events. 12/43 cut-off events. For 14/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 1 based on Foata normal form. 7/50 useless extension candidates. Maximal degree in co-relation 135. Up to 24 conditions per place. [2023-08-26 18:22:36,673 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 14 selfloop transitions, 5 changer transitions 3/24 dead transitions. [2023-08-26 18:22:36,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 24 transitions, 133 flow [2023-08-26 18:22:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2023-08-26 18:22:36,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133136094674556 [2023-08-26 18:22:36,675 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2023-08-26 18:22:36,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2023-08-26 18:22:36,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:36,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2023-08-26 18:22:36,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 169.0) internal successors, (845), 5 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,678 INFO L175 Difference]: Start difference. First operand has 32 places, 18 transitions, 69 flow. Second operand 4 states and 347 transitions. [2023-08-26 18:22:36,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 24 transitions, 133 flow [2023-08-26 18:22:36,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 24 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:22:36,680 INFO L231 Difference]: Finished difference. Result has 35 places, 18 transitions, 84 flow [2023-08-26 18:22:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=35, PETRI_TRANSITIONS=18} [2023-08-26 18:22:36,682 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-26 18:22:36,682 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 18 transitions, 84 flow [2023-08-26 18:22:36,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:36,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:36,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:22:36,683 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 18:22:36,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:36,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1177348822, now seen corresponding path program 1 times [2023-08-26 18:22:36,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:36,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553519466] [2023-08-26 18:22:36,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:36,809 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 18:22:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:36,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553519466] [2023-08-26 18:22:36,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553519466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:36,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:36,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:22:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983903036] [2023-08-26 18:22:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:36,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:36,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 18 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:36,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:36,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:36,842 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2023-08-26 18:22:36,843 INFO L125 PetriNetUnfolderBase]: For 31/37 co-relation queries the response was YES. [2023-08-26 18:22:36,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 26 events. 6/26 cut-off events. For 31/37 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 28 event pairs, 0 based on Foata normal form. 6/32 useless extension candidates. Maximal degree in co-relation 91. Up to 12 conditions per place. [2023-08-26 18:22:36,843 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 18:22:36,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 20 transitions, 122 flow [2023-08-26 18:22:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 424 transitions. [2023-08-26 18:22:36,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5017751479289941 [2023-08-26 18:22:36,845 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 424 transitions. [2023-08-26 18:22:36,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 424 transitions. [2023-08-26 18:22:36,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:36,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 424 transitions. [2023-08-26 18:22:36,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,848 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 169.0) internal successors, (1014), 6 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,849 INFO L175 Difference]: Start difference. First operand has 35 places, 18 transitions, 84 flow. Second operand 5 states and 424 transitions. [2023-08-26 18:22:36,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 20 transitions, 122 flow [2023-08-26 18:22:36,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 20 transitions, 107 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 18:22:36,850 INFO L231 Difference]: Finished difference. Result has 34 places, 0 transitions, 0 flow [2023-08-26 18:22:36,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=5, PETRI_FLOW=0, PETRI_PLACES=34, PETRI_TRANSITIONS=0} [2023-08-26 18:22:36,851 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-26 18:22:36,851 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 0 transitions, 0 flow [2023-08-26 18:22:36,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:36,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:22:36,854 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:22:36,855 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:22:36,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:22:36,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:22:36,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:22:36,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:22:36,856 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:22:36,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:22:36,858 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:22:36,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:22:36,858 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:36,861 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:22:36,861 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:22:36,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:22:36 BasicIcfg [2023-08-26 18:22:36,865 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:22:36,866 INFO L158 Benchmark]: Toolchain (without parser) took 5979.25ms. Allocated memory was 346.0MB in the beginning and 436.2MB in the end (delta: 90.2MB). Free memory was 302.3MB in the beginning and 379.9MB in the end (delta: -77.5MB). Peak memory consumption was 13.3MB. Max. memory is 16.0GB. [2023-08-26 18:22:36,866 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 346.0MB. Free memory was 322.9MB in the beginning and 322.8MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:36,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 504.04ms. Allocated memory is still 346.0MB. Free memory was 302.0MB in the beginning and 281.7MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 18:22:36,866 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.43ms. Allocated memory is still 346.0MB. Free memory was 281.7MB in the beginning and 279.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:36,867 INFO L158 Benchmark]: Boogie Preprocessor took 38.32ms. Allocated memory is still 346.0MB. Free memory was 279.6MB in the beginning and 278.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:36,867 INFO L158 Benchmark]: RCFGBuilder took 503.69ms. Allocated memory is still 346.0MB. Free memory was 278.2MB in the beginning and 312.4MB in the end (delta: -34.1MB). Peak memory consumption was 9.5MB. Max. memory is 16.0GB. [2023-08-26 18:22:36,867 INFO L158 Benchmark]: TraceAbstraction took 4870.30ms. Allocated memory was 346.0MB in the beginning and 436.2MB in the end (delta: 90.2MB). Free memory was 311.7MB in the beginning and 379.9MB in the end (delta: -68.1MB). Peak memory consumption was 20.6MB. Max. memory is 16.0GB. [2023-08-26 18:22:36,871 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 346.0MB. Free memory was 322.9MB in the beginning and 322.8MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 504.04ms. Allocated memory is still 346.0MB. Free memory was 302.0MB in the beginning and 281.7MB in the end (delta: 20.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.43ms. Allocated memory is still 346.0MB. Free memory was 281.7MB in the beginning and 279.9MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 38.32ms. Allocated memory is still 346.0MB. Free memory was 279.6MB in the beginning and 278.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 503.69ms. Allocated memory is still 346.0MB. Free memory was 278.2MB in the beginning and 312.4MB in the end (delta: -34.1MB). Peak memory consumption was 9.5MB. Max. memory is 16.0GB. * TraceAbstraction took 4870.30ms. Allocated memory was 346.0MB in the beginning and 436.2MB in the end (delta: 90.2MB). Free memory was 311.7MB in the beginning and 379.9MB in the end (delta: -68.1MB). Peak memory consumption was 20.6MB. 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: 2.4s, 85 PlacesBefore, 32 PlacesAfterwards, 76 TransitionsBefore, 23 TransitionsAfterwards, 1128 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 76 TotalNumberOfCompositions, 2066 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1227, independent: 1157, independent conditional: 0, independent unconditional: 1157, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 618, independent: 590, independent conditional: 0, independent unconditional: 590, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1227, independent: 567, independent conditional: 0, independent unconditional: 567, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 618, unknown conditional: 0, unknown unconditional: 618] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, 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, 114 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: 4.7s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 79 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 79 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 260 IncrementalHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 4 mSDtfsCounter, 260 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=4, InterpolantAutomatonStates: 34, 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, 1.1s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 79 ConstructedInterpolants, 0 QuantifiedInterpolants, 255 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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 18:22:36,893 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...