/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/safe008_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:22:19,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:22:19,070 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 18:22:19,073 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:22:19,073 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:22:19,098 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:22:19,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:22:19,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:22:19,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:22:19,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:22:19,103 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:22:19,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:22:19,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:22:19,103 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:22:19,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:22:19,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:22:19,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:22:19,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:22:19,105 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:22:19,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:22:19,105 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:22:19,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:22:19,108 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:22:19,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:22:19,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:22:19,108 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:22:19,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:22:19,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:19,109 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:22:19,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:22:19,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:22:19,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:22:19,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:22:19,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:22:19,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:22:19,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:22:19,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:22:19,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:22:19,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:22:19,387 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:22:19,388 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:22:19,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2023-08-26 18:22:20,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:22:20,603 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:22:20,604 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe008_tso.i [2023-08-26 18:22:20,619 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131809f67/558078a4ab134cd2a56967b58114e36d/FLAGcc42f422d [2023-08-26 18:22:20,633 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/131809f67/558078a4ab134cd2a56967b58114e36d [2023-08-26 18:22:20,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:22:20,638 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:22:20,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:20,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:22:20,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:22:20,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:20" (1/1) ... [2023-08-26 18:22:20,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28343fe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:20, skipping insertion in model container [2023-08-26 18:22:20,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:22:20" (1/1) ... [2023-08-26 18:22:20,689 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:22:20,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:20,966 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:22:20,988 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:20,989 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:22:21,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:22:21,021 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:21,021 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:22:21,027 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:22:21,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21 WrapperNode [2023-08-26 18:22:21,028 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:22:21,029 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:21,029 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:22:21,029 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:22:21,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,080 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 18:22:21,080 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:22:21,081 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:22:21,081 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:22:21,081 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:22:21,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,088 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,092 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,093 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:22:21,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:22:21,098 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:22:21,098 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:22:21,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (1/1) ... [2023-08-26 18:22:21,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:22:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:22:21,122 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 18:22:21,165 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 18:22:21,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:22:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:22:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:22:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:22:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:22:21,188 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:22:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:22:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:22:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:22:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:22:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:22:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:22:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:22:21,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:22:21,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:22:21,191 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 18:22:21,309 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:22:21,310 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:22:21,449 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:22:21,453 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:22:21,454 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:22:21,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:21 BoogieIcfgContainer [2023-08-26 18:22:21,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:22:21,457 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:22:21,457 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:22:21,459 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:22:21,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:22:20" (1/3) ... [2023-08-26 18:22:21,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:21, skipping insertion in model container [2023-08-26 18:22:21,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:22:21" (2/3) ... [2023-08-26 18:22:21,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5978f29c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:22:21, skipping insertion in model container [2023-08-26 18:22:21,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:22:21" (3/3) ... [2023-08-26 18:22:21,461 INFO L112 eAbstractionObserver]: Analyzing ICFG safe008_tso.i [2023-08-26 18:22:21,472 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:22:21,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:22:21,473 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:22:21,525 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:22:21,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 18:22:21,596 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 18:22:21,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:21,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 3/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 18:22:21,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 18:22:21,602 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 18:22:21,604 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:22:21,609 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 18:22:21,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 18:22:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 18:22:21,623 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 18:22:21,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 78 events. 1/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 18:22:21,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 18:22:23,435 INFO L134 LiptonReduction]: Checked pairs total: 2218 [2023-08-26 18:22:23,435 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-26 18:22:23,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:22:23,456 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;@7ba30bc8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:22:23,456 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:22:23,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:22:23,458 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:22:23,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:23,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:23,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:22:23,459 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 18:22:23,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash 328, now seen corresponding path program 1 times [2023-08-26 18:22:23,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:23,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311854514] [2023-08-26 18:22:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:23,546 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 18:22:23,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311854514] [2023-08-26 18:22:23,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311854514] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:23,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:22:23,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652466546] [2023-08-26 18:22:23,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:23,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:22:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:22:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:22:23,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 169 [2023-08-26 18:22:23,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:23,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:23,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 169 [2023-08-26 18:22:23,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:23,658 INFO L124 PetriNetUnfolderBase]: 164/293 cut-off events. [2023-08-26 18:22:23,658 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:22:23,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 293 events. 164/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1201 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 583. Up to 271 conditions per place. [2023-08-26 18:22:23,662 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 18:22:23,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 18:22:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:22:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:22:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-08-26 18:22:23,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5798816568047337 [2023-08-26 18:22:23,673 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-08-26 18:22:23,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-08-26 18:22:23,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:23,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-08-26 18:22:23,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:23,685 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 18:22:23,686 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 18:22:23,687 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 55 flow. Second operand 2 states and 196 transitions. [2023-08-26 18:22:23,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 18:22:23,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:22:23,689 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 18:22:23,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 18:22:23,692 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 18:22:23,692 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 18:22:23,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:23,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:23,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:23,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:22:23,693 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 18:22:23,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1256343265, now seen corresponding path program 1 times [2023-08-26 18:22:23,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:23,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000978131] [2023-08-26 18:22:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:23,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:24,013 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 18:22:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000978131] [2023-08-26 18:22:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000978131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:22:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81634189] [2023-08-26 18:22:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:22:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:24,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:22:24,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:22:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 18:22:24,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:24,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 18:22:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:24,090 INFO L124 PetriNetUnfolderBase]: 265/479 cut-off events. [2023-08-26 18:22:24,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:22:24,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 479 events. 265/479 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2313 event pairs, 106 based on Foata normal form. 19/498 useless extension candidates. Maximal degree in co-relation 950. Up to 331 conditions per place. [2023-08-26 18:22:24,096 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 21 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-26 18:22:24,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 28 transitions, 118 flow [2023-08-26 18:22:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:22:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:22:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 18:22:24,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266272189349113 [2023-08-26 18:22:24,102 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 18:22:24,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 18:22:24,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:24,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 18:22:24,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,106 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 18:22:24,107 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 18:22:24,107 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 267 transitions. [2023-08-26 18:22:24,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 28 transitions, 118 flow [2023-08-26 18:22:24,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 118 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:22:24,111 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 69 flow [2023-08-26 18:22:24,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-26 18:22:24,112 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-26 18:22:24,112 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 69 flow [2023-08-26 18:22:24,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:24,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:24,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:22:24,116 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 18:22:24,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash 291934636, now seen corresponding path program 1 times [2023-08-26 18:22:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:24,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50059545] [2023-08-26 18:22:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:24,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:24,326 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 18:22:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:24,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50059545] [2023-08-26 18:22:24,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50059545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:24,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:24,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:24,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132165306] [2023-08-26 18:22:24,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:24,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:24,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 18:22:24,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:24,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 18:22:24,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:24,390 INFO L124 PetriNetUnfolderBase]: 247/441 cut-off events. [2023-08-26 18:22:24,390 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 18:22:24,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 441 events. 247/441 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2045 event pairs, 52 based on Foata normal form. 8/447 useless extension candidates. Maximal degree in co-relation 1109. Up to 225 conditions per place. [2023-08-26 18:22:24,393 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 23 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 18:22:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 159 flow [2023-08-26 18:22:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2023-08-26 18:22:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133136094674556 [2023-08-26 18:22:24,395 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2023-08-26 18:22:24,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2023-08-26 18:22:24,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:24,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2023-08-26 18:22:24,396 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 18:22:24,398 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 18:22:24,398 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 18:22:24,398 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 69 flow. Second operand 4 states and 347 transitions. [2023-08-26 18:22:24,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 159 flow [2023-08-26 18:22:24,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:22:24,401 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 96 flow [2023-08-26 18:22:24,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-26 18:22:24,402 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-26 18:22:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 96 flow [2023-08-26 18:22:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:24,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:22:24,405 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 18:22:24,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:24,406 INFO L85 PathProgramCache]: Analyzing trace with hash 291934574, now seen corresponding path program 1 times [2023-08-26 18:22:24,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:24,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725164551] [2023-08-26 18:22:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:24,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:24,524 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 18:22:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725164551] [2023-08-26 18:22:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725164551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:24,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812958729] [2023-08-26 18:22:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:24,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:24,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:24,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 169 [2023-08-26 18:22:24,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:24,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 169 [2023-08-26 18:22:24,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:24,587 INFO L124 PetriNetUnfolderBase]: 224/414 cut-off events. [2023-08-26 18:22:24,587 INFO L125 PetriNetUnfolderBase]: For 220/220 co-relation queries the response was YES. [2023-08-26 18:22:24,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 414 events. 224/414 cut-off events. For 220/220 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1935 event pairs, 44 based on Foata normal form. 7/420 useless extension candidates. Maximal degree in co-relation 1117. Up to 226 conditions per place. [2023-08-26 18:22:24,590 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 27 selfloop transitions, 6 changer transitions 0/35 dead transitions. [2023-08-26 18:22:24,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 207 flow [2023-08-26 18:22:24,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2023-08-26 18:22:24,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162721893491125 [2023-08-26 18:22:24,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2023-08-26 18:22:24,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2023-08-26 18:22:24,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:24,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2023-08-26 18:22:24,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,593 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 18:22:24,593 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 18:22:24,593 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 96 flow. Second operand 4 states and 349 transitions. [2023-08-26 18:22:24,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 207 flow [2023-08-26 18:22:24,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:24,598 INFO L231 Difference]: Finished difference. Result has 36 places, 24 transitions, 129 flow [2023-08-26 18:22:24,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=36, PETRI_TRANSITIONS=24} [2023-08-26 18:22:24,599 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-26 18:22:24,600 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 24 transitions, 129 flow [2023-08-26 18:22:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.25) internal successors, (329), 4 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:24,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:24,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:22:24,600 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 18:22:24,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:24,601 INFO L85 PathProgramCache]: Analyzing trace with hash 460025654, now seen corresponding path program 1 times [2023-08-26 18:22:24,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:24,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071029677] [2023-08-26 18:22:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:24,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:24,667 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 18:22:24,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:24,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071029677] [2023-08-26 18:22:24,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071029677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:24,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:24,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:24,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424662507] [2023-08-26 18:22:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:24,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:24,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:24,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 169 [2023-08-26 18:22:24,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 24 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:24,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 169 [2023-08-26 18:22:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:24,737 INFO L124 PetriNetUnfolderBase]: 301/561 cut-off events. [2023-08-26 18:22:24,737 INFO L125 PetriNetUnfolderBase]: For 674/682 co-relation queries the response was YES. [2023-08-26 18:22:24,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 561 events. 301/561 cut-off events. For 674/682 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2862 event pairs, 71 based on Foata normal form. 26/586 useless extension candidates. Maximal degree in co-relation 1550. Up to 182 conditions per place. [2023-08-26 18:22:24,739 INFO L140 encePairwiseOnDemand]: 165/169 looper letters, 28 selfloop transitions, 4 changer transitions 6/41 dead transitions. [2023-08-26 18:22:24,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 41 transitions, 265 flow [2023-08-26 18:22:24,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:22:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:22:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2023-08-26 18:22:24,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5399408284023669 [2023-08-26 18:22:24,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 365 transitions. [2023-08-26 18:22:24,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 365 transitions. [2023-08-26 18:22:24,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:24,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 365 transitions. [2023-08-26 18:22:24,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.25) internal successors, (365), 4 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,743 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 18:22:24,743 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 18:22:24,743 INFO L175 Difference]: Start difference. First operand has 36 places, 24 transitions, 129 flow. Second operand 4 states and 365 transitions. [2023-08-26 18:22:24,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 41 transitions, 265 flow [2023-08-26 18:22:24,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:22:24,745 INFO L231 Difference]: Finished difference. Result has 40 places, 22 transitions, 123 flow [2023-08-26 18:22:24,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=22} [2023-08-26 18:22:24,746 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 18:22:24,746 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 22 transitions, 123 flow [2023-08-26 18:22:24,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:24,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:24,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:22:24,746 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 18:22:24,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:24,747 INFO L85 PathProgramCache]: Analyzing trace with hash -251661933, now seen corresponding path program 1 times [2023-08-26 18:22:24,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:24,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249183185] [2023-08-26 18:22:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:24,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:24,822 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 18:22:24,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:24,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249183185] [2023-08-26 18:22:24,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249183185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:24,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:24,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:24,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602107954] [2023-08-26 18:22:24,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:24,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:24,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:24,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 169 [2023-08-26 18:22:24,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 22 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 169 [2023-08-26 18:22:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:24,886 INFO L124 PetriNetUnfolderBase]: 213/381 cut-off events. [2023-08-26 18:22:24,886 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2023-08-26 18:22:24,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 381 events. 213/381 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1514 event pairs, 71 based on Foata normal form. 18/398 useless extension candidates. Maximal degree in co-relation 1138. Up to 154 conditions per place. [2023-08-26 18:22:24,887 INFO L140 encePairwiseOnDemand]: 164/169 looper letters, 21 selfloop transitions, 4 changer transitions 11/37 dead transitions. [2023-08-26 18:22:24,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 246 flow [2023-08-26 18:22:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2023-08-26 18:22:24,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005917159763313 [2023-08-26 18:22:24,889 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2023-08-26 18:22:24,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2023-08-26 18:22:24,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:24,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2023-08-26 18:22:24,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,892 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 18:22:24,892 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 18:22:24,892 INFO L175 Difference]: Start difference. First operand has 40 places, 22 transitions, 123 flow. Second operand 5 states and 423 transitions. [2023-08-26 18:22:24,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 246 flow [2023-08-26 18:22:24,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 227 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-26 18:22:24,895 INFO L231 Difference]: Finished difference. Result has 41 places, 17 transitions, 89 flow [2023-08-26 18:22:24,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=17} [2023-08-26 18:22:24,897 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-26 18:22:24,898 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 17 transitions, 89 flow [2023-08-26 18:22:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:24,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:24,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:22:24,898 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 18:22:24,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1782616769, now seen corresponding path program 1 times [2023-08-26 18:22:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:24,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254837347] [2023-08-26 18:22:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:24,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:25,008 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 18:22:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254837347] [2023-08-26 18:22:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254837347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:22:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291759242] [2023-08-26 18:22:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:22:25,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:25,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:22:25,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:22:25,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:25,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 17 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:25,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:25,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:25,080 INFO L124 PetriNetUnfolderBase]: 62/137 cut-off events. [2023-08-26 18:22:25,080 INFO L125 PetriNetUnfolderBase]: For 206/208 co-relation queries the response was YES. [2023-08-26 18:22:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 137 events. 62/137 cut-off events. For 206/208 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 457 event pairs, 16 based on Foata normal form. 5/139 useless extension candidates. Maximal degree in co-relation 415. Up to 82 conditions per place. [2023-08-26 18:22:25,081 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 19 selfloop transitions, 3 changer transitions 13/38 dead transitions. [2023-08-26 18:22:25,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 245 flow [2023-08-26 18:22:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:22:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:22:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 442 transitions. [2023-08-26 18:22:25,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-26 18:22:25,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 442 transitions. [2023-08-26 18:22:25,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 442 transitions. [2023-08-26 18:22:25,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:25,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 442 transitions. [2023-08-26 18:22:25,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,086 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 18:22:25,087 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 18:22:25,087 INFO L175 Difference]: Start difference. First operand has 41 places, 17 transitions, 89 flow. Second operand 5 states and 442 transitions. [2023-08-26 18:22:25,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 245 flow [2023-08-26 18:22:25,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 182 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-08-26 18:22:25,088 INFO L231 Difference]: Finished difference. Result has 39 places, 19 transitions, 87 flow [2023-08-26 18:22:25,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=87, PETRI_PLACES=39, PETRI_TRANSITIONS=19} [2023-08-26 18:22:25,089 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 18:22:25,089 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 19 transitions, 87 flow [2023-08-26 18:22:25,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:25,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:25,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:22:25,090 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 18:22:25,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash 508315406, now seen corresponding path program 1 times [2023-08-26 18:22:25,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:25,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581606408] [2023-08-26 18:22:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:25,170 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 18:22:25,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:25,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581606408] [2023-08-26 18:22:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581606408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:25,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:25,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:22:25,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614370367] [2023-08-26 18:22:25,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:25,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:22:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:25,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:22:25,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:22:25,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:25,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 19 transitions, 87 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:25,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:25,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:25,224 INFO L124 PetriNetUnfolderBase]: 40/98 cut-off events. [2023-08-26 18:22:25,225 INFO L125 PetriNetUnfolderBase]: For 86/98 co-relation queries the response was YES. [2023-08-26 18:22:25,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 98 events. 40/98 cut-off events. For 86/98 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 7 based on Foata normal form. 9/104 useless extension candidates. Maximal degree in co-relation 328. Up to 50 conditions per place. [2023-08-26 18:22:25,225 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 20 selfloop transitions, 5 changer transitions 13/41 dead transitions. [2023-08-26 18:22:25,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 261 flow [2023-08-26 18:22:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:22:25,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:22:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2023-08-26 18:22:25,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187376725838264 [2023-08-26 18:22:25,227 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2023-08-26 18:22:25,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2023-08-26 18:22:25,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:25,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2023-08-26 18:22:25,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,230 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 169.0) internal successors, (1183), 7 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,230 INFO L175 Difference]: Start difference. First operand has 39 places, 19 transitions, 87 flow. Second operand 6 states and 526 transitions. [2023-08-26 18:22:25,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 261 flow [2023-08-26 18:22:25,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 256 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:22:25,231 INFO L231 Difference]: Finished difference. Result has 43 places, 19 transitions, 106 flow [2023-08-26 18:22:25,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=19} [2023-08-26 18:22:25,232 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-26 18:22:25,232 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 19 transitions, 106 flow [2023-08-26 18:22:25,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:22:25,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:25,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:22:25,233 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 18:22:25,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:22:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1043742278, now seen corresponding path program 1 times [2023-08-26 18:22:25,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:22:25,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803008009] [2023-08-26 18:22:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:22:25,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:22:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:22:25,320 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 18:22:25,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:22:25,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803008009] [2023-08-26 18:22:25,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803008009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:22:25,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:22:25,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:22:25,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49218281] [2023-08-26 18:22:25,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:22:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:22:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:22:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:22:25,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:22:25,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 169 [2023-08-26 18:22:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 19 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:22:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 169 [2023-08-26 18:22:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:22:25,366 INFO L124 PetriNetUnfolderBase]: 27/69 cut-off events. [2023-08-26 18:22:25,366 INFO L125 PetriNetUnfolderBase]: For 137/151 co-relation queries the response was YES. [2023-08-26 18:22:25,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 69 events. 27/69 cut-off events. For 137/151 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 6 based on Foata normal form. 8/75 useless extension candidates. Maximal degree in co-relation 246. Up to 27 conditions per place. [2023-08-26 18:22:25,366 INFO L140 encePairwiseOnDemand]: 163/169 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-26 18:22:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 30 transitions, 197 flow [2023-08-26 18:22:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:22:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:22:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 595 transitions. [2023-08-26 18:22:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029585798816568 [2023-08-26 18:22:25,368 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 595 transitions. [2023-08-26 18:22:25,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 595 transitions. [2023-08-26 18:22:25,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:22:25,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 595 transitions. [2023-08-26 18:22:25,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.0) internal successors, (595), 7 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,371 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,371 INFO L175 Difference]: Start difference. First operand has 43 places, 19 transitions, 106 flow. Second operand 7 states and 595 transitions. [2023-08-26 18:22:25,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 30 transitions, 197 flow [2023-08-26 18:22:25,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 167 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-26 18:22:25,372 INFO L231 Difference]: Finished difference. Result has 40 places, 0 transitions, 0 flow [2023-08-26 18:22:25,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=40, PETRI_TRANSITIONS=0} [2023-08-26 18:22:25,373 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 18:22:25,373 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 0 transitions, 0 flow [2023-08-26 18:22:25,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:22:25,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:22:25,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:22:25,376 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:22:25,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:22:25,377 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:22:25,379 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:22:25,379 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:22:25,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:22:25 BasicIcfg [2023-08-26 18:22:25,381 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:22:25,381 INFO L158 Benchmark]: Toolchain (without parser) took 4743.11ms. Allocated memory was 408.9MB in the beginning and 566.2MB in the end (delta: 157.3MB). Free memory was 383.6MB in the beginning and 452.0MB in the end (delta: -68.4MB). Peak memory consumption was 90.1MB. Max. memory is 16.0GB. [2023-08-26 18:22:25,382 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 408.9MB. Free memory is still 385.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:25,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 388.27ms. Allocated memory is still 408.9MB. Free memory was 383.2MB in the beginning and 363.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 18:22:25,382 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.38ms. Allocated memory is still 408.9MB. Free memory was 363.1MB in the beginning and 361.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:22:25,382 INFO L158 Benchmark]: Boogie Preprocessor took 16.17ms. Allocated memory is still 408.9MB. Free memory was 361.0MB in the beginning and 359.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:22:25,382 INFO L158 Benchmark]: RCFGBuilder took 357.84ms. Allocated memory is still 408.9MB. Free memory was 359.7MB in the beginning and 345.0MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 18:22:25,383 INFO L158 Benchmark]: TraceAbstraction took 3923.97ms. Allocated memory was 408.9MB in the beginning and 566.2MB in the end (delta: 157.3MB). Free memory was 344.2MB in the beginning and 452.0MB in the end (delta: -107.7MB). Peak memory consumption was 50.3MB. Max. memory is 16.0GB. [2023-08-26 18:22:25,383 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 408.9MB. Free memory is still 385.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 388.27ms. Allocated memory is still 408.9MB. Free memory was 383.2MB in the beginning and 363.1MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.38ms. Allocated memory is still 408.9MB. Free memory was 363.1MB in the beginning and 361.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.17ms. Allocated memory is still 408.9MB. Free memory was 361.0MB in the beginning and 359.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 357.84ms. Allocated memory is still 408.9MB. Free memory was 359.7MB in the beginning and 345.0MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3923.97ms. Allocated memory was 408.9MB in the beginning and 566.2MB in the end (delta: 157.3MB). Free memory was 344.2MB in the beginning and 452.0MB in the end (delta: -107.7MB). Peak memory consumption was 50.3MB. 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: 1.8s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 30 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 74 TotalNumberOfCompositions, 2218 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1344, independent: 1265, independent conditional: 0, independent unconditional: 1265, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 638, independent: 608, independent conditional: 0, independent unconditional: 608, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1344, independent: 657, independent conditional: 0, independent unconditional: 657, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 638, unknown conditional: 0, unknown unconditional: 638] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 117 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.8s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 110 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 110 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353 IncrementalHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 6 mSDtfsCounter, 353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129occurred in iteration=4, InterpolantAutomatonStates: 40, 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, 0.9s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 357 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 18:22:25,425 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...