/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 -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-atomic/peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:42:08,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:42:08,258 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 11:42:08,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:42:08,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:42:08,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:42:08,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:42:08,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:42:08,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:42:08,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:42:08,300 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:42:08,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:42:08,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:42:08,301 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:42:08,302 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:42:08,302 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:42:08,302 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:42:08,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:42:08,302 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:42:08,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:42:08,303 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:42:08,304 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:42:08,304 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:42:08,305 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:42:08,305 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:42:08,305 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:42:08,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:42:08,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:08,306 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:42:08,306 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:42:08,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:42:08,307 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:42:08,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:42:08,307 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:42:08,307 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:42:08,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:42:08,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:42:08,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:42:08,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:42:08,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:42:08,670 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:42:08,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/peterson.i [2023-08-26 11:42:09,794 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:42:10,036 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:42:10,036 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/peterson.i [2023-08-26 11:42:10,053 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6578310e5/dc1f072826394db491a3ad16a4346e9d/FLAGe0e5325bb [2023-08-26 11:42:10,066 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6578310e5/dc1f072826394db491a3ad16a4346e9d [2023-08-26 11:42:10,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:42:10,069 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:42:10,070 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:10,070 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:42:10,073 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:42:10,074 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55336776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10, skipping insertion in model container [2023-08-26 11:42:10,075 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,115 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:42:10,245 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:42:10,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:10,395 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:42:10,409 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:42:10,424 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 11:42:10,426 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 11:42:10,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:10,481 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:10,482 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:10,482 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:10,488 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:42:10,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10 WrapperNode [2023-08-26 11:42:10,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:10,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:10,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:42:10,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:42:10,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,553 INFO L138 Inliner]: procedures = 171, calls = 49, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 113 [2023-08-26 11:42:10,554 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:10,555 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:42:10,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:42:10,556 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:42:10,563 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,575 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,591 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,599 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,601 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:42:10,602 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:42:10,602 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:42:10,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:42:10,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (1/1) ... [2023-08-26 11:42:10,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:10,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:42:10,646 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 11:42:10,675 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 11:42:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:42:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 11:42:10,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 11:42:10,689 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:42:10,689 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:42:10,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:42:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:42:10,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:42:10,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:42:10,694 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 11:42:10,833 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:42:10,835 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:42:10,999 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:42:11,005 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:42:11,005 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:42:11,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:11 BoogieIcfgContainer [2023-08-26 11:42:11,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:42:11,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:42:11,010 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:42:11,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:42:11,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:42:10" (1/3) ... [2023-08-26 11:42:11,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd60583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:11, skipping insertion in model container [2023-08-26 11:42:11,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:10" (2/3) ... [2023-08-26 11:42:11,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd60583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:11, skipping insertion in model container [2023-08-26 11:42:11,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:11" (3/3) ... [2023-08-26 11:42:11,015 INFO L112 eAbstractionObserver]: Analyzing ICFG peterson.i [2023-08-26 11:42:11,027 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:42:11,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 11:42:11,028 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:42:11,102 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:42:11,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 208 flow [2023-08-26 11:42:11,192 INFO L124 PetriNetUnfolderBase]: 8/94 cut-off events. [2023-08-26 11:42:11,192 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:42:11,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 94 events. 8/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2023-08-26 11:42:11,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 208 flow [2023-08-26 11:42:11,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 85 transitions, 179 flow [2023-08-26 11:42:11,210 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:42:11,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 85 transitions, 179 flow [2023-08-26 11:42:11,231 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 85 transitions, 179 flow [2023-08-26 11:42:11,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 85 transitions, 179 flow [2023-08-26 11:42:11,261 INFO L124 PetriNetUnfolderBase]: 8/85 cut-off events. [2023-08-26 11:42:11,261 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:42:11,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 8/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 143 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2023-08-26 11:42:11,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 2116 [2023-08-26 11:42:13,439 INFO L134 LiptonReduction]: Checked pairs total: 6174 [2023-08-26 11:42:13,439 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-26 11:42:13,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:42:13,467 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;@7b1b22c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:42:13,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 11:42:13,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:42:13,469 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:42:13,469 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:42:13,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:13,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:42:13,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:13,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash 385, now seen corresponding path program 1 times [2023-08-26 11:42:13,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:13,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573071732] [2023-08-26 11:42:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:13,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:13,562 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 11:42:13,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:13,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573071732] [2023-08-26 11:42:13,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573071732] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:13,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:13,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:42:13,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139943272] [2023-08-26 11:42:13,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:13,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:42:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:13,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:42:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:42:13,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 173 [2023-08-26 11:42:13,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 95 flow. Second operand has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:13,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:13,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 173 [2023-08-26 11:42:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:13,732 INFO L124 PetriNetUnfolderBase]: 308/613 cut-off events. [2023-08-26 11:42:13,732 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 11:42:13,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 613 events. 308/613 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3400 event pairs, 287 based on Foata normal form. 28/412 useless extension candidates. Maximal degree in co-relation 1043. Up to 509 conditions per place. [2023-08-26 11:42:13,743 INFO L140 encePairwiseOnDemand]: 167/173 looper letters, 24 selfloop transitions, 0 changer transitions 0/34 dead transitions. [2023-08-26 11:42:13,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 125 flow [2023-08-26 11:42:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:42:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:42:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2023-08-26 11:42:13,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838150289017341 [2023-08-26 11:42:13,756 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2023-08-26 11:42:13,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2023-08-26 11:42:13,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:13,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2023-08-26 11:42:13,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:13,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:13,768 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:13,769 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 95 flow. Second operand 2 states and 202 transitions. [2023-08-26 11:42:13,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 125 flow [2023-08-26 11:42:13,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:42:13,774 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 72 flow [2023-08-26 11:42:13,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=72, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2023-08-26 11:42:13,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-26 11:42:13,782 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 72 flow [2023-08-26 11:42:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:13,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:13,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:42:13,785 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:13,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:13,786 INFO L85 PathProgramCache]: Analyzing trace with hash 377827, now seen corresponding path program 1 times [2023-08-26 11:42:13,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:13,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354626191] [2023-08-26 11:42:13,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:13,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:13,996 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 11:42:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:13,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354626191] [2023-08-26 11:42:13,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354626191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:13,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:13,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:13,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395673581] [2023-08-26 11:42:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:14,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:14,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:14,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 173 [2023-08-26 11:42:14,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 173 [2023-08-26 11:42:14,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,093 INFO L124 PetriNetUnfolderBase]: 297/589 cut-off events. [2023-08-26 11:42:14,094 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:42:14,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 589 events. 297/589 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3237 event pairs, 276 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 1088. Up to 484 conditions per place. [2023-08-26 11:42:14,100 INFO L140 encePairwiseOnDemand]: 170/173 looper letters, 21 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-26 11:42:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 112 flow [2023-08-26 11:42:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-26 11:42:14,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44508670520231214 [2023-08-26 11:42:14,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-26 11:42:14,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-26 11:42:14,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-26 11:42:14,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,112 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 72 flow. Second operand 3 states and 231 transitions. [2023-08-26 11:42:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 112 flow [2023-08-26 11:42:14,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:14,116 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 70 flow [2023-08-26 11:42:14,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-26 11:42:14,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2023-08-26 11:42:14,118 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 70 flow [2023-08-26 11:42:14,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:14,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:42:14,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,124 INFO L85 PathProgramCache]: Analyzing trace with hash 377829, now seen corresponding path program 1 times [2023-08-26 11:42:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350390256] [2023-08-26 11:42:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,232 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 11:42:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350390256] [2023-08-26 11:42:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350390256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616375849] [2023-08-26 11:42:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:14,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 173 [2023-08-26 11:42:14,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 173 [2023-08-26 11:42:14,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,300 INFO L124 PetriNetUnfolderBase]: 286/565 cut-off events. [2023-08-26 11:42:14,300 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:42:14,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045 conditions, 565 events. 286/565 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3063 event pairs, 265 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 1041. Up to 460 conditions per place. [2023-08-26 11:42:14,305 INFO L140 encePairwiseOnDemand]: 170/173 looper letters, 19 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 11:42:14,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 106 flow [2023-08-26 11:42:14,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-08-26 11:42:14,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4296724470134875 [2023-08-26 11:42:14,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-08-26 11:42:14,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-08-26 11:42:14,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-08-26 11:42:14,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,310 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 70 flow. Second operand 3 states and 223 transitions. [2023-08-26 11:42:14,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 106 flow [2023-08-26 11:42:14,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 105 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:14,311 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 67 flow [2023-08-26 11:42:14,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-26 11:42:14,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-26 11:42:14,313 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 67 flow [2023-08-26 11:42:14,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:14,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:42:14,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 363101561, now seen corresponding path program 1 times [2023-08-26 11:42:14,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584045710] [2023-08-26 11:42:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,485 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 11:42:14,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584045710] [2023-08-26 11:42:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584045710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966828592] [2023-08-26 11:42:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 173 [2023-08-26 11:42:14,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 173 [2023-08-26 11:42:14,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,539 INFO L124 PetriNetUnfolderBase]: 210/427 cut-off events. [2023-08-26 11:42:14,540 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:42:14,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795 conditions, 427 events. 210/427 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2202 event pairs, 194 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 791. Up to 347 conditions per place. [2023-08-26 11:42:14,542 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 18 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 11:42:14,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 103 flow [2023-08-26 11:42:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2023-08-26 11:42:14,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142581888246628 [2023-08-26 11:42:14,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2023-08-26 11:42:14,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2023-08-26 11:42:14,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2023-08-26 11:42:14,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,546 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 67 flow. Second operand 3 states and 215 transitions. [2023-08-26 11:42:14,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 103 flow [2023-08-26 11:42:14,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:14,547 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 66 flow [2023-08-26 11:42:14,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-08-26 11:42:14,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-26 11:42:14,548 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 66 flow [2023-08-26 11:42:14,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:42:14,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash 363101560, now seen corresponding path program 1 times [2023-08-26 11:42:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792999506] [2023-08-26 11:42:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,602 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 11:42:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792999506] [2023-08-26 11:42:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792999506] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753727246] [2023-08-26 11:42:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:14,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:14,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 173 [2023-08-26 11:42:14,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 173 [2023-08-26 11:42:14,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,647 INFO L124 PetriNetUnfolderBase]: 134/289 cut-off events. [2023-08-26 11:42:14,647 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:42:14,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 289 events. 134/289 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1387 event pairs, 123 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 541. Up to 234 conditions per place. [2023-08-26 11:42:14,649 INFO L140 encePairwiseOnDemand]: 171/173 looper letters, 17 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 11:42:14,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 100 flow [2023-08-26 11:42:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-26 11:42:14,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40655105973025046 [2023-08-26 11:42:14,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-26 11:42:14,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-26 11:42:14,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-26 11:42:14,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,653 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 66 flow. Second operand 3 states and 211 transitions. [2023-08-26 11:42:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 100 flow [2023-08-26 11:42:14,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:14,654 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 65 flow [2023-08-26 11:42:14,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-26 11:42:14,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -8 predicate places. [2023-08-26 11:42:14,655 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 65 flow [2023-08-26 11:42:14,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:42:14,656 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 689027864, now seen corresponding path program 1 times [2023-08-26 11:42:14,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101092370] [2023-08-26 11:42:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,683 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 11:42:14,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101092370] [2023-08-26 11:42:14,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101092370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:14,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216359956] [2023-08-26 11:42:14,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:14,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:14,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-26 11:42:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-26 11:42:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,743 INFO L124 PetriNetUnfolderBase]: 172/358 cut-off events. [2023-08-26 11:42:14,743 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 11:42:14,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 358 events. 172/358 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1623 event pairs, 75 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 697. Up to 166 conditions per place. [2023-08-26 11:42:14,745 INFO L140 encePairwiseOnDemand]: 167/173 looper letters, 26 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2023-08-26 11:42:14,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 146 flow [2023-08-26 11:42:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-08-26 11:42:14,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202312138728323 [2023-08-26 11:42:14,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-08-26 11:42:14,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-08-26 11:42:14,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-08-26 11:42:14,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,749 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 65 flow. Second operand 3 states and 270 transitions. [2023-08-26 11:42:14,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 146 flow [2023-08-26 11:42:14,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 145 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:14,751 INFO L231 Difference]: Finished difference. Result has 39 places, 29 transitions, 86 flow [2023-08-26 11:42:14,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2023-08-26 11:42:14,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-26 11:42:14,752 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 86 flow [2023-08-26 11:42:14,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:14,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:42:14,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr2Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1215851456, now seen corresponding path program 1 times [2023-08-26 11:42:14,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638895612] [2023-08-26 11:42:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,777 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 11:42:14,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638895612] [2023-08-26 11:42:14,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638895612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:42:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353831761] [2023-08-26 11:42:14,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:14,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 173 [2023-08-26 11:42:14,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 173 [2023-08-26 11:42:14,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:14,850 INFO L124 PetriNetUnfolderBase]: 142/310 cut-off events. [2023-08-26 11:42:14,850 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 11:42:14,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 686 conditions, 310 events. 142/310 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1378 event pairs, 77 based on Foata normal form. 24/312 useless extension candidates. Maximal degree in co-relation 681. Up to 165 conditions per place. [2023-08-26 11:42:14,852 INFO L140 encePairwiseOnDemand]: 169/173 looper letters, 21 selfloop transitions, 2 changer transitions 5/36 dead transitions. [2023-08-26 11:42:14,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 157 flow [2023-08-26 11:42:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 11:42:14,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144508670520231 [2023-08-26 11:42:14,854 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 11:42:14,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 11:42:14,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:14,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 11:42:14,855 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 11:42:14,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 173.0) internal successors, (692), 4 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,856 INFO L175 Difference]: Start difference. First operand has 39 places, 29 transitions, 86 flow. Second operand 3 states and 267 transitions. [2023-08-26 11:42:14,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 157 flow [2023-08-26 11:42:14,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:42:14,858 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 86 flow [2023-08-26 11:42:14,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-26 11:42:14,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2023-08-26 11:42:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 86 flow [2023-08-26 11:42:14,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:14,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:14,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:42:14,859 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:14,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1222495592, now seen corresponding path program 1 times [2023-08-26 11:42:14,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:14,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749076921] [2023-08-26 11:42:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:14,921 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 11:42:14,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:14,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749076921] [2023-08-26 11:42:14,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749076921] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:14,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:14,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:42:14,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659515248] [2023-08-26 11:42:14,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:14,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:42:14,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:42:14,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:42:14,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-26 11:42:14,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:14,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:14,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-26 11:42:14,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:15,140 INFO L124 PetriNetUnfolderBase]: 339/646 cut-off events. [2023-08-26 11:42:15,141 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2023-08-26 11:42:15,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 646 events. 339/646 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2979 event pairs, 55 based on Foata normal form. 28/672 useless extension candidates. Maximal degree in co-relation 1386. Up to 262 conditions per place. [2023-08-26 11:42:15,144 INFO L140 encePairwiseOnDemand]: 164/173 looper letters, 44 selfloop transitions, 10 changer transitions 31/88 dead transitions. [2023-08-26 11:42:15,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 88 transitions, 396 flow [2023-08-26 11:42:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:42:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:42:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 808 transitions. [2023-08-26 11:42:15,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46705202312138727 [2023-08-26 11:42:15,147 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 808 transitions. [2023-08-26 11:42:15,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 808 transitions. [2023-08-26 11:42:15,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:15,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 808 transitions. [2023-08-26 11:42:15,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 80.8) internal successors, (808), 10 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 173.0) internal successors, (1903), 11 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,154 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 173.0) internal successors, (1903), 11 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,154 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 86 flow. Second operand 10 states and 808 transitions. [2023-08-26 11:42:15,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 88 transitions, 396 flow [2023-08-26 11:42:15,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 88 transitions, 393 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:15,159 INFO L231 Difference]: Finished difference. Result has 55 places, 37 transitions, 170 flow [2023-08-26 11:42:15,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=37} [2023-08-26 11:42:15,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2023-08-26 11:42:15,162 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 37 transitions, 170 flow [2023-08-26 11:42:15,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:15,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:15,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:42:15,163 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 11:42:15,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash 125445220, now seen corresponding path program 2 times [2023-08-26 11:42:15,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:15,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439680983] [2023-08-26 11:42:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:15,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:15,243 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 11:42:15,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:15,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439680983] [2023-08-26 11:42:15,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439680983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:15,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:15,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:42:15,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894557052] [2023-08-26 11:42:15,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:15,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:42:15,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:15,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:42:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:42:15,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 173 [2023-08-26 11:42:15,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 37 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:15,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 173 [2023-08-26 11:42:15,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:15,422 INFO L124 PetriNetUnfolderBase]: 295/554 cut-off events. [2023-08-26 11:42:15,422 INFO L125 PetriNetUnfolderBase]: For 691/693 co-relation queries the response was YES. [2023-08-26 11:42:15,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1644 conditions, 554 events. 295/554 cut-off events. For 691/693 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2350 event pairs, 36 based on Foata normal form. 24/576 useless extension candidates. Maximal degree in co-relation 1630. Up to 211 conditions per place. [2023-08-26 11:42:15,424 INFO L140 encePairwiseOnDemand]: 164/173 looper letters, 0 selfloop transitions, 0 changer transitions 89/89 dead transitions. [2023-08-26 11:42:15,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 89 transitions, 583 flow [2023-08-26 11:42:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:42:15,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:42:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 721 transitions. [2023-08-26 11:42:15,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630700064226076 [2023-08-26 11:42:15,427 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 721 transitions. [2023-08-26 11:42:15,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 721 transitions. [2023-08-26 11:42:15,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:15,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 721 transitions. [2023-08-26 11:42:15,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.11111111111111) internal successors, (721), 9 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 173.0) internal successors, (1730), 10 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,431 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 173.0) internal successors, (1730), 10 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,432 INFO L175 Difference]: Start difference. First operand has 55 places, 37 transitions, 170 flow. Second operand 9 states and 721 transitions. [2023-08-26 11:42:15,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 89 transitions, 583 flow [2023-08-26 11:42:15,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 89 transitions, 521 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-26 11:42:15,437 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-26 11:42:15,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-26 11:42:15,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2023-08-26 11:42:15,438 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-26 11:42:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 74.33333333333333) internal successors, (446), 6 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:42:15,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (12 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-08-26 11:42:15,441 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 14 remaining) [2023-08-26 11:42:15,442 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 14 remaining) [2023-08-26 11:42:15,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:42:15,443 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:15,447 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:42:15,447 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:42:15,450 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:42:15 BasicIcfg [2023-08-26 11:42:15,450 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:42:15,450 INFO L158 Benchmark]: Toolchain (without parser) took 5381.06ms. Allocated memory was 346.0MB in the beginning and 448.8MB in the end (delta: 102.8MB). Free memory was 320.7MB in the beginning and 309.5MB in the end (delta: 11.2MB). Peak memory consumption was 114.7MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,450 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 346.0MB. Free memory is still 322.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:42:15,451 INFO L158 Benchmark]: CACSL2BoogieTranslator took 418.73ms. Allocated memory is still 346.0MB. Free memory was 320.7MB in the beginning and 300.6MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,451 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.98ms. Allocated memory is still 346.0MB. Free memory was 300.6MB in the beginning and 298.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,451 INFO L158 Benchmark]: Boogie Preprocessor took 46.27ms. Allocated memory is still 346.0MB. Free memory was 298.6MB in the beginning and 296.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,451 INFO L158 Benchmark]: RCFGBuilder took 405.92ms. Allocated memory is still 346.0MB. Free memory was 296.9MB in the beginning and 282.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,452 INFO L158 Benchmark]: TraceAbstraction took 4440.54ms. Allocated memory was 346.0MB in the beginning and 448.8MB in the end (delta: 102.8MB). Free memory was 281.8MB in the beginning and 309.5MB in the end (delta: -27.7MB). Peak memory consumption was 76.9MB. Max. memory is 16.0GB. [2023-08-26 11:42:15,453 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 346.0MB. Free memory is still 322.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 418.73ms. Allocated memory is still 346.0MB. Free memory was 320.7MB in the beginning and 300.6MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 63.98ms. Allocated memory is still 346.0MB. Free memory was 300.6MB in the beginning and 298.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.27ms. Allocated memory is still 346.0MB. Free memory was 298.6MB in the beginning and 296.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 405.92ms. Allocated memory is still 346.0MB. Free memory was 296.9MB in the beginning and 282.8MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4440.54ms. Allocated memory was 346.0MB in the beginning and 448.8MB in the end (delta: 102.8MB). Free memory was 281.8MB in the beginning and 309.5MB in the end (delta: -27.7MB). Peak memory consumption was 76.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] - GenericResultAtLocation [Line: 265]: Unsoundness Warning unspecified type, defaulting to int C: short [265] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 84 PlacesBefore, 44 PlacesAfterwards, 85 TransitionsBefore, 43 TransitionsAfterwards, 2116 CoEnabledTransitionPairs, 5 FixpointIterations, 25 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 2 ChoiceCompositions, 77 TotalNumberOfCompositions, 6174 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3715, independent: 3520, independent conditional: 0, independent unconditional: 3520, dependent: 195, dependent conditional: 0, dependent unconditional: 195, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1273, independent: 1232, independent conditional: 0, independent unconditional: 1232, dependent: 41, dependent conditional: 0, dependent unconditional: 41, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3715, independent: 2288, independent conditional: 0, independent unconditional: 2288, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 1273, unknown conditional: 0, unknown unconditional: 1273] , Statistics on independence cache: Total cache size (in pairs): 293, Positive cache size: 268, Positive conditional cache size: 0, Positive unconditional cache size: 268, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 12]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 131 locations, 14 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 206 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 206 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 592 IncrementalHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 30 mSDtfsCounter, 592 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=8, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 210 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 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 11:42:15,477 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...