/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-atomic/szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:44:08,514 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:44:08,576 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 17:44:08,579 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:44:08,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:44:08,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:44:08,599 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:44:08,599 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:44:08,600 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:44:08,603 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:44:08,603 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:44:08,603 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:44:08,603 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:44:08,604 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:44:08,604 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:44:08,604 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:44:08,605 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:44:08,605 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:44:08,605 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:44:08,605 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:44:08,605 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:44:08,606 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:44:08,606 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:44:08,606 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:44:08,606 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:44:08,607 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:44:08,607 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:44:08,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:44:08,607 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:44:08,607 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:44:08,608 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:44:08,608 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:44:08,608 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:44:08,608 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:44:08,608 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:44:08,609 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:44:08,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:44:08,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:44:08,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:44:08,885 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:44:08,885 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:44:08,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-26 17:44:10,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:44:10,184 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:44:10,185 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/szymanski.i [2023-08-26 17:44:10,195 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80621a714/b066866e99ed49d5a416095d22669469/FLAGfa3b62d57 [2023-08-26 17:44:10,205 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80621a714/b066866e99ed49d5a416095d22669469 [2023-08-26 17:44:10,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:44:10,207 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:44:10,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:44:10,208 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:44:10,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:44:10,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b6dc9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10, skipping insertion in model container [2023-08-26 17:44:10,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,242 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:44:10,381 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 17:44:10,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:44:10,506 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:44:10,521 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 17:44:10,532 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 17:44:10,538 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-26 17:44:10,549 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:44:10,583 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:44:10,583 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:44:10,583 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:44:10,588 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:44:10,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10 WrapperNode [2023-08-26 17:44:10,589 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:44:10,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:44:10,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:44:10,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:44:10,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,634 INFO L138 Inliner]: procedures = 171, calls = 77, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 180 [2023-08-26 17:44:10,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:44:10,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:44:10,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:44:10,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:44:10,642 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,654 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,655 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,660 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,661 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:44:10,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:44:10,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:44:10,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:44:10,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (1/1) ... [2023-08-26 17:44:10,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:44:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:44:10,696 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 17:44:10,727 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 17:44:10,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:44:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 17:44:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 17:44:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 17:44:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 17:44:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:44:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 17:44:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:44:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:44:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:44:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:44:10,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 17:44:10,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:44:10,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:44:10,741 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 17:44:10,859 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:44:10,860 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:44:11,041 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:44:11,045 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:44:11,045 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-26 17:44:11,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:44:11 BoogieIcfgContainer [2023-08-26 17:44:11,047 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:44:11,048 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:44:11,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:44:11,050 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:44:11,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:44:10" (1/3) ... [2023-08-26 17:44:11,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c02d4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:44:11, skipping insertion in model container [2023-08-26 17:44:11,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:44:10" (2/3) ... [2023-08-26 17:44:11,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c02d4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:44:11, skipping insertion in model container [2023-08-26 17:44:11,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:44:11" (3/3) ... [2023-08-26 17:44:11,052 INFO L112 eAbstractionObserver]: Analyzing ICFG szymanski.i [2023-08-26 17:44:11,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:44:11,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 17:44:11,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:44:11,112 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:44:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 131 transitions, 278 flow [2023-08-26 17:44:11,183 INFO L124 PetriNetUnfolderBase]: 22/129 cut-off events. [2023-08-26 17:44:11,183 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:44:11,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 129 events. 22/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 97. Up to 3 conditions per place. [2023-08-26 17:44:11,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 131 transitions, 278 flow [2023-08-26 17:44:11,197 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 120 transitions, 249 flow [2023-08-26 17:44:11,199 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:44:11,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 120 transitions, 249 flow [2023-08-26 17:44:11,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 120 transitions, 249 flow [2023-08-26 17:44:11,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 120 transitions, 249 flow [2023-08-26 17:44:11,225 INFO L124 PetriNetUnfolderBase]: 22/120 cut-off events. [2023-08-26 17:44:11,226 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:44:11,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 120 events. 22/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 97. Up to 3 conditions per place. [2023-08-26 17:44:11,229 INFO L119 LiptonReduction]: Number of co-enabled transitions 5248 [2023-08-26 17:44:12,983 INFO L134 LiptonReduction]: Checked pairs total: 13851 [2023-08-26 17:44:12,984 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-26 17:44:12,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:44:13,002 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;@3b2f7abd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:44:13,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2023-08-26 17:44:13,003 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:44:13,003 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:44:13,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:44:13,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:13,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:44:13,004 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 17:44:13,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:13,008 INFO L85 PathProgramCache]: Analyzing trace with hash 574, now seen corresponding path program 1 times [2023-08-26 17:44:13,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:13,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737076736] [2023-08-26 17:44:13,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:13,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:13,091 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 17:44:13,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737076736] [2023-08-26 17:44:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737076736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:44:13,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218295123] [2023-08-26 17:44:13,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:13,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:44:13,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:13,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:44:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:44:13,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 229 [2023-08-26 17:44:13,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 129 flow. Second operand has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 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 17:44:13,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:13,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 229 [2023-08-26 17:44:13,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:13,302 INFO L124 PetriNetUnfolderBase]: 1534/2411 cut-off events. [2023-08-26 17:44:13,302 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 17:44:13,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 2411 events. 1534/2411 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12011 event pairs, 732 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 4245. Up to 2078 conditions per place. [2023-08-26 17:44:13,317 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 37 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2023-08-26 17:44:13,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 185 flow [2023-08-26 17:44:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:44:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:44:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2023-08-26 17:44:13,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5960698689956332 [2023-08-26 17:44:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2023-08-26 17:44:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2023-08-26 17:44:13,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:13,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2023-08-26 17:44:13,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:13,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 17:44:13,340 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 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 17:44:13,341 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 129 flow. Second operand 2 states and 273 transitions. [2023-08-26 17:44:13,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 185 flow [2023-08-26 17:44:13,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:44:13,345 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 106 flow [2023-08-26 17:44:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=106, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2023-08-26 17:44:13,349 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2023-08-26 17:44:13,349 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 106 flow [2023-08-26 17:44:13,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 115.5) internal successors, (231), 2 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 17:44:13,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:13,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:44:13,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:44:13,350 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 17:44:13,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:13,350 INFO L85 PathProgramCache]: Analyzing trace with hash 563958, now seen corresponding path program 1 times [2023-08-26 17:44:13,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:13,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437440557] [2023-08-26 17:44:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:13,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:13,509 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 17:44:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437440557] [2023-08-26 17:44:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437440557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:13,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:13,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:44:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260635343] [2023-08-26 17:44:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:13,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:44:13,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:44:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:44:13,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 229 [2023-08-26 17:44:13,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 17:44:13,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:13,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 229 [2023-08-26 17:44:13,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:13,631 INFO L124 PetriNetUnfolderBase]: 1501/2350 cut-off events. [2023-08-26 17:44:13,631 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:44:13,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4394 conditions, 2350 events. 1501/2350 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11665 event pairs, 713 based on Foata normal form. 0/1307 useless extension candidates. Maximal degree in co-relation 4391. Up to 2022 conditions per place. [2023-08-26 17:44:13,641 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 34 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-26 17:44:13,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 49 transitions, 172 flow [2023-08-26 17:44:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:13,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-26 17:44:13,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48180494905385735 [2023-08-26 17:44:13,644 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-26 17:44:13,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-26 17:44:13,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:13,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-26 17:44:13,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 17:44:13,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:13,649 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:13,649 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 106 flow. Second operand 3 states and 331 transitions. [2023-08-26 17:44:13,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 49 transitions, 172 flow [2023-08-26 17:44:13,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:44:13,652 INFO L231 Difference]: Finished difference. Result has 46 places, 49 transitions, 104 flow [2023-08-26 17:44:13,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=49} [2023-08-26 17:44:13,653 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -7 predicate places. [2023-08-26 17:44:13,653 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 49 transitions, 104 flow [2023-08-26 17:44:13,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 17:44:13,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:13,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:44:13,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:44:13,657 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 17:44:13,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 563959, now seen corresponding path program 1 times [2023-08-26 17:44:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348914639] [2023-08-26 17:44:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:13,719 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 17:44:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348914639] [2023-08-26 17:44:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348914639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:13,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:44:13,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056881287] [2023-08-26 17:44:13,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:44:13,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:13,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:44:13,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:44:13,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 229 [2023-08-26 17:44:13,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 49 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 17:44:13,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:13,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 229 [2023-08-26 17:44:13,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:13,869 INFO L124 PetriNetUnfolderBase]: 1468/2289 cut-off events. [2023-08-26 17:44:13,870 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:44:13,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4280 conditions, 2289 events. 1468/2289 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11274 event pairs, 694 based on Foata normal form. 0/1283 useless extension candidates. Maximal degree in co-relation 4276. Up to 1967 conditions per place. [2023-08-26 17:44:13,881 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 32 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-08-26 17:44:13,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 166 flow [2023-08-26 17:44:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:13,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 17:44:13,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47016011644832606 [2023-08-26 17:44:13,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 17:44:13,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 17:44:13,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:13,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 17:44:13,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 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 17:44:13,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:13,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:13,885 INFO L175 Difference]: Start difference. First operand has 46 places, 49 transitions, 104 flow. Second operand 3 states and 323 transitions. [2023-08-26 17:44:13,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 166 flow [2023-08-26 17:44:13,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:44:13,887 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 101 flow [2023-08-26 17:44:13,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-08-26 17:44:13,888 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-08-26 17:44:13,889 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 101 flow [2023-08-26 17:44:13,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 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 17:44:13,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:13,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:44:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:44:13,892 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 17:44:13,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 541976866, now seen corresponding path program 1 times [2023-08-26 17:44:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868247575] [2023-08-26 17:44:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:13,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868247575] [2023-08-26 17:44:14,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868247575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:44:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119826728] [2023-08-26 17:44:14,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:44:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:44:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:44:14,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 229 [2023-08-26 17:44:14,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:14,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 229 [2023-08-26 17:44:14,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,129 INFO L124 PetriNetUnfolderBase]: 1084/1714 cut-off events. [2023-08-26 17:44:14,129 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:44:14,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1714 events. 1084/1714 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8074 event pairs, 498 based on Foata normal form. 0/1014 useless extension candidates. Maximal degree in co-relation 3203. Up to 1468 conditions per place. [2023-08-26 17:44:14,136 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 31 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 17:44:14,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 163 flow [2023-08-26 17:44:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:14,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-26 17:44:14,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45414847161572053 [2023-08-26 17:44:14,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-26 17:44:14,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-26 17:44:14,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-26 17:44:14,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 17:44:14,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,141 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 101 flow. Second operand 3 states and 312 transitions. [2023-08-26 17:44:14,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 163 flow [2023-08-26 17:44:14,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:44:14,142 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 100 flow [2023-08-26 17:44:14,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-26 17:44:14,143 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-08-26 17:44:14,143 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 100 flow [2023-08-26 17:44:14,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:14,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:44:14,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:44:14,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 17:44:14,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,144 INFO L85 PathProgramCache]: Analyzing trace with hash 541976867, now seen corresponding path program 1 times [2023-08-26 17:44:14,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076603532] [2023-08-26 17:44:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,237 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 17:44:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076603532] [2023-08-26 17:44:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076603532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:44:14,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082419562] [2023-08-26 17:44:14,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:44:14,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:44:14,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:44:14,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-08-26 17:44:14,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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 17:44:14,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-08-26 17:44:14,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,313 INFO L124 PetriNetUnfolderBase]: 700/1139 cut-off events. [2023-08-26 17:44:14,313 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:44:14,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2134 conditions, 1139 events. 700/1139 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5056 event pairs, 302 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 2130. Up to 969 conditions per place. [2023-08-26 17:44:14,317 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 30 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 17:44:14,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 160 flow [2023-08-26 17:44:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-26 17:44:14,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570596797671033 [2023-08-26 17:44:14,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-26 17:44:14,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-26 17:44:14,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-26 17:44:14,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 17:44:14,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,321 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 100 flow. Second operand 3 states and 314 transitions. [2023-08-26 17:44:14,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 160 flow [2023-08-26 17:44:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:44:14,321 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 99 flow [2023-08-26 17:44:14,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-26 17:44:14,322 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -8 predicate places. [2023-08-26 17:44:14,322 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 99 flow [2023-08-26 17:44:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 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 17:44:14,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:44:14,323 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 17:44:14,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1169261730, now seen corresponding path program 1 times [2023-08-26 17:44:14,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813133769] [2023-08-26 17:44:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,339 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 17:44:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813133769] [2023-08-26 17:44:14,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813133769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:44:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364789202] [2023-08-26 17:44:14,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:44:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:44:14,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:44:14,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 229 [2023-08-26 17:44:14,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 17:44:14,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 229 [2023-08-26 17:44:14,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,424 INFO L124 PetriNetUnfolderBase]: 801/1302 cut-off events. [2023-08-26 17:44:14,424 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 17:44:14,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1302 events. 801/1302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5804 event pairs, 222 based on Foata normal form. 0/845 useless extension candidates. Maximal degree in co-relation 2472. Up to 757 conditions per place. [2023-08-26 17:44:14,429 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 46 selfloop transitions, 3 changer transitions 2/63 dead transitions. [2023-08-26 17:44:14,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 238 flow [2023-08-26 17:44:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-26 17:44:14,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487627365356623 [2023-08-26 17:44:14,430 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-26 17:44:14,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-26 17:44:14,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-26 17:44:14,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:14,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,433 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,433 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 99 flow. Second operand 3 states and 377 transitions. [2023-08-26 17:44:14,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 238 flow [2023-08-26 17:44:14,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 63 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:44:14,434 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 118 flow [2023-08-26 17:44:14,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-26 17:44:14,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-08-26 17:44:14,435 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 118 flow [2023-08-26 17:44:14,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 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 17:44:14,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:14,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:44:14,435 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 17:44:14,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1533666279, now seen corresponding path program 1 times [2023-08-26 17:44:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580012687] [2023-08-26 17:44:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,474 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 17:44:14,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580012687] [2023-08-26 17:44:14,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580012687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:44:14,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624729069] [2023-08-26 17:44:14,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:44:14,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:44:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:44:14,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 229 [2023-08-26 17:44:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 17:44:14,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 229 [2023-08-26 17:44:14,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,567 INFO L124 PetriNetUnfolderBase]: 740/1211 cut-off events. [2023-08-26 17:44:14,567 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2023-08-26 17:44:14,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2465 conditions, 1211 events. 740/1211 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5365 event pairs, 225 based on Foata normal form. 36/914 useless extension candidates. Maximal degree in co-relation 2460. Up to 759 conditions per place. [2023-08-26 17:44:14,571 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 41 selfloop transitions, 2 changer transitions 6/61 dead transitions. [2023-08-26 17:44:14,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 247 flow [2023-08-26 17:44:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-26 17:44:14,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458515283842795 [2023-08-26 17:44:14,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-26 17:44:14,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-26 17:44:14,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-26 17:44:14,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:14,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,574 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 118 flow. Second operand 3 states and 375 transitions. [2023-08-26 17:44:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 247 flow [2023-08-26 17:44:14,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 241 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:44:14,577 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 122 flow [2023-08-26 17:44:14,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-08-26 17:44:14,577 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-08-26 17:44:14,577 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 122 flow [2023-08-26 17:44:14,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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 17:44:14,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:14,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:44:14,578 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 17:44:14,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash -105469467, now seen corresponding path program 1 times [2023-08-26 17:44:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901333433] [2023-08-26 17:44:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,604 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 17:44:14,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901333433] [2023-08-26 17:44:14,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901333433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:44:14,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605489408] [2023-08-26 17:44:14,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:44:14,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:44:14,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:44:14,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2023-08-26 17:44:14,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 17:44:14,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2023-08-26 17:44:14,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,755 INFO L124 PetriNetUnfolderBase]: 1004/1625 cut-off events. [2023-08-26 17:44:14,756 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-26 17:44:14,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3342 conditions, 1625 events. 1004/1625 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7283 event pairs, 208 based on Foata normal form. 20/1281 useless extension candidates. Maximal degree in co-relation 3336. Up to 552 conditions per place. [2023-08-26 17:44:14,760 INFO L140 encePairwiseOnDemand]: 212/229 looper letters, 52 selfloop transitions, 20 changer transitions 17/97 dead transitions. [2023-08-26 17:44:14,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 97 transitions, 421 flow [2023-08-26 17:44:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:44:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:44:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 542 transitions. [2023-08-26 17:44:14,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733624454148472 [2023-08-26 17:44:14,762 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 542 transitions. [2023-08-26 17:44:14,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 542 transitions. [2023-08-26 17:44:14,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 542 transitions. [2023-08-26 17:44:14,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.4) internal successors, (542), 5 states have internal predecessors, (542), 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 17:44:14,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 17:44:14,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 17:44:14,764 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 122 flow. Second operand 5 states and 542 transitions. [2023-08-26 17:44:14,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 97 transitions, 421 flow [2023-08-26 17:44:14,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 97 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:44:14,766 INFO L231 Difference]: Finished difference. Result has 56 places, 61 transitions, 270 flow [2023-08-26 17:44:14,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=56, PETRI_TRANSITIONS=61} [2023-08-26 17:44:14,767 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-26 17:44:14,767 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 61 transitions, 270 flow [2023-08-26 17:44:14,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 17:44:14,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:14,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:44:14,767 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 17:44:14,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -865393491, now seen corresponding path program 2 times [2023-08-26 17:44:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306739038] [2023-08-26 17:44:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,789 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 17:44:14,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306739038] [2023-08-26 17:44:14,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306739038] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:44:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075789985] [2023-08-26 17:44:14,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:44:14,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:44:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:44:14,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 229 [2023-08-26 17:44:14,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 61 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 17:44:14,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 229 [2023-08-26 17:44:14,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:14,894 INFO L124 PetriNetUnfolderBase]: 819/1396 cut-off events. [2023-08-26 17:44:14,894 INFO L125 PetriNetUnfolderBase]: For 1147/1159 co-relation queries the response was YES. [2023-08-26 17:44:14,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3935 conditions, 1396 events. 819/1396 cut-off events. For 1147/1159 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6509 event pairs, 314 based on Foata normal form. 0/1320 useless extension candidates. Maximal degree in co-relation 3926. Up to 1014 conditions per place. [2023-08-26 17:44:14,899 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 66 selfloop transitions, 5 changer transitions 2/81 dead transitions. [2023-08-26 17:44:14,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 505 flow [2023-08-26 17:44:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:44:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:44:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2023-08-26 17:44:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519650655021834 [2023-08-26 17:44:14,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 357 transitions. [2023-08-26 17:44:14,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 357 transitions. [2023-08-26 17:44:14,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:14,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 357 transitions. [2023-08-26 17:44:14,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 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 17:44:14,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 17:44:14,902 INFO L175 Difference]: Start difference. First operand has 56 places, 61 transitions, 270 flow. Second operand 3 states and 357 transitions. [2023-08-26 17:44:14,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 505 flow [2023-08-26 17:44:14,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 503 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 17:44:14,906 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 308 flow [2023-08-26 17:44:14,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-08-26 17:44:14,907 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-26 17:44:14,907 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 308 flow [2023-08-26 17:44:14,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 17:44:14,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:14,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:44:14,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr2Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2023-08-26 17:44:14,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1705619629, now seen corresponding path program 3 times [2023-08-26 17:44:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554315006] [2023-08-26 17:44:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:14,930 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 17:44:14,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:14,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554315006] [2023-08-26 17:44:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554315006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:44:14,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:44:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:44:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668325723] [2023-08-26 17:44:14,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:44:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:44:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:14,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:44:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:44:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 229 [2023-08-26 17:44:14,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 17:44:14,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:14,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 229 [2023-08-26 17:44:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:15,078 INFO L124 PetriNetUnfolderBase]: 847/1456 cut-off events. [2023-08-26 17:44:15,079 INFO L125 PetriNetUnfolderBase]: For 1679/1737 co-relation queries the response was YES. [2023-08-26 17:44:15,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4290 conditions, 1456 events. 847/1456 cut-off events. For 1679/1737 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6922 event pairs, 247 based on Foata normal form. 54/1455 useless extension candidates. Maximal degree in co-relation 4279. Up to 719 conditions per place. [2023-08-26 17:44:15,082 INFO L140 encePairwiseOnDemand]: 213/229 looper letters, 0 selfloop transitions, 0 changer transitions 113/113 dead transitions. [2023-08-26 17:44:15,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 113 transitions, 712 flow [2023-08-26 17:44:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:44:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:44:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 533 transitions. [2023-08-26 17:44:15,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46550218340611355 [2023-08-26 17:44:15,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 533 transitions. [2023-08-26 17:44:15,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 533 transitions. [2023-08-26 17:44:15,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:15,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 533 transitions. [2023-08-26 17:44:15,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.6) internal successors, (533), 5 states have internal predecessors, (533), 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 17:44:15,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 17:44:15,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 17:44:15,088 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 308 flow. Second operand 5 states and 533 transitions. [2023-08-26 17:44:15,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 113 transitions, 712 flow [2023-08-26 17:44:15,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 113 transitions, 686 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 17:44:15,093 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-26 17:44:15,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-26 17:44:15,093 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-26 17:44:15,094 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-26 17:44:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (13 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (12 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2023-08-26 17:44:15,096 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONASSERT (1 of 14 remaining) [2023-08-26 17:44:15,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 14 remaining) [2023-08-26 17:44:15,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 17:44:15,097 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:15,100 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:44:15,101 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:44:15,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:44:15 BasicIcfg [2023-08-26 17:44:15,103 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:44:15,103 INFO L158 Benchmark]: Toolchain (without parser) took 4895.59ms. Allocated memory was 373.3MB in the beginning and 539.0MB in the end (delta: 165.7MB). Free memory was 329.1MB in the beginning and 253.1MB in the end (delta: 76.0MB). Peak memory consumption was 243.7MB. Max. memory is 16.0GB. [2023-08-26 17:44:15,103 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory was 350.5MB in the beginning and 350.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:44:15,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.59ms. Allocated memory is still 373.3MB. Free memory was 329.1MB in the beginning and 308.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:44:15,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.39ms. Allocated memory is still 373.3MB. Free memory was 308.1MB in the beginning and 306.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:44:15,104 INFO L158 Benchmark]: Boogie Preprocessor took 36.94ms. Allocated memory is still 373.3MB. Free memory was 306.0MB in the beginning and 305.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:44:15,104 INFO L158 Benchmark]: RCFGBuilder took 374.05ms. Allocated memory is still 373.3MB. Free memory was 305.0MB in the beginning and 288.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 17:44:15,104 INFO L158 Benchmark]: TraceAbstraction took 4054.42ms. Allocated memory was 373.3MB in the beginning and 539.0MB in the end (delta: 165.7MB). Free memory was 287.1MB in the beginning and 253.1MB in the end (delta: 34.0MB). Peak memory consumption was 201.8MB. Max. memory is 16.0GB. [2023-08-26 17:44:15,105 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 373.3MB. Free memory was 350.5MB in the beginning and 350.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 380.59ms. Allocated memory is still 373.3MB. Free memory was 329.1MB in the beginning and 308.1MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.39ms. Allocated memory is still 373.3MB. Free memory was 308.1MB in the beginning and 306.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.94ms. Allocated memory is still 373.3MB. Free memory was 306.0MB in the beginning and 305.0MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 374.05ms. Allocated memory is still 373.3MB. Free memory was 305.0MB in the beginning and 288.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 4054.42ms. Allocated memory was 373.3MB in the beginning and 539.0MB in the end (delta: 165.7MB). Free memory was 287.1MB in the beginning and 253.1MB in the end (delta: 34.0MB). Peak memory consumption was 201.8MB. 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: 1.8s, 105 PlacesBefore, 53 PlacesAfterwards, 120 TransitionsBefore, 60 TransitionsAfterwards, 5248 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 8 ChoiceCompositions, 98 TotalNumberOfCompositions, 13851 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6097, independent: 5783, independent conditional: 0, independent unconditional: 5783, dependent: 314, dependent conditional: 0, dependent unconditional: 314, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2726, independent: 2665, independent conditional: 0, independent unconditional: 2665, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6097, independent: 3118, independent conditional: 0, independent unconditional: 3118, dependent: 253, dependent conditional: 0, dependent unconditional: 253, unknown: 2726, unknown conditional: 0, unknown unconditional: 2726] , Statistics on independence cache: Total cache size (in pairs): 382, Positive cache size: 337, Positive conditional cache size: 0, Positive unconditional cache size: 337, Negative cache size: 45, Negative conditional cache size: 0, Negative unconditional cache size: 45, 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, 174 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: 4.0s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 285 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 285 mSDsluCounter, 29 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 693 IncrementalHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 25 mSDtfsCounter, 693 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=308occurred in iteration=9, InterpolantAutomatonStates: 33, 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, 0.4s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 210 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 17:44:15,133 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...