/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:16:10,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:16:10,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 15:16:10,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:16:10,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:16:10,528 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:16:10,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:16:10,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:16:10,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:16:10,533 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:16:10,533 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:16:10,534 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:16:10,534 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:16:10,535 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:16:10,535 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:16:10,535 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:16:10,536 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:16:10,536 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:16:10,536 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:16:10,536 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:16:10,537 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:16:10,537 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:16:10,538 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:16:10,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:16:10,538 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:16:10,539 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:16:10,539 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:16:10,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:16:10,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:16:10,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:16:10,540 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:16:10,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:16:10,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:16:10,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:16:10,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:16:10,542 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:16:10,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:16:10,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:16:10,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:16:10,902 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:16:10,902 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:16:10,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2023-08-26 15:16:12,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:16:12,323 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:16:12,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2023-08-26 15:16:12,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f842b22/b9f36145efa64391a315df064eab2b36/FLAG888108fb9 [2023-08-26 15:16:12,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f842b22/b9f36145efa64391a315df064eab2b36 [2023-08-26 15:16:12,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:16:12,355 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:16:12,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:16:12,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:16:12,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:16:12,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232b1bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12, skipping insertion in model container [2023-08-26 15:16:12,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,411 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:16:12,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:16:12,714 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:16:12,744 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:16:12,745 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 15:16:12,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:16:12,802 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:16:12,802 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 15:16:12,808 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:16:12,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12 WrapperNode [2023-08-26 15:16:12,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:16:12,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:16:12,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:16:12,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:16:12,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,866 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 15:16:12,867 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:16:12,868 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:16:12,868 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:16:12,868 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:16:12,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,893 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,893 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,897 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,900 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,901 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,903 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:16:12,903 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:16:12,904 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:16:12,904 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:16:12,904 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (1/1) ... [2023-08-26 15:16:12,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:16:12,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:16:12,942 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 15:16:12,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 15:16:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:16:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 15:16:12,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:16:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:16:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:16:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 15:16:12,984 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 15:16:12,984 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 15:16:12,985 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 15:16:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 15:16:12,985 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 15:16:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:16:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 15:16:12,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:16:12,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:16:12,987 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 15:16:13,134 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:16:13,135 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:16:13,302 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:16:13,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:16:13,308 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:16:13,310 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:16:13 BoogieIcfgContainer [2023-08-26 15:16:13,311 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:16:13,313 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:16:13,313 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:16:13,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:16:13,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:16:12" (1/3) ... [2023-08-26 15:16:13,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2879de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:16:13, skipping insertion in model container [2023-08-26 15:16:13,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:16:12" (2/3) ... [2023-08-26 15:16:13,317 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2879de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:16:13, skipping insertion in model container [2023-08-26 15:16:13,317 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:16:13" (3/3) ... [2023-08-26 15:16:13,318 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2023-08-26 15:16:13,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:16:13,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 15:16:13,336 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:16:13,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:16:13,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 15:16:13,485 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-08-26 15:16:13,485 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:16:13,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 3/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 15:16:13,490 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 95 transitions, 205 flow [2023-08-26 15:16:13,493 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 78 transitions, 165 flow [2023-08-26 15:16:13,496 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:16:13,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 15:16:13,506 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 78 transitions, 165 flow [2023-08-26 15:16:13,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 78 transitions, 165 flow [2023-08-26 15:16:13,522 INFO L124 PetriNetUnfolderBase]: 1/78 cut-off events. [2023-08-26 15:16:13,523 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:16:13,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 78 events. 1/78 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 15:16:13,524 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 15:16:15,662 INFO L134 LiptonReduction]: Checked pairs total: 2223 [2023-08-26 15:16:15,662 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-08-26 15:16:15,674 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:16:15,680 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;@68b71471, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:16:15,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 15:16:15,681 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:16:15,681 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:16:15,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:16:15,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:15,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:16:15,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:15,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash 328, now seen corresponding path program 1 times [2023-08-26 15:16:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:15,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590853009] [2023-08-26 15:16:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:15,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590853009] [2023-08-26 15:16:15,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590853009] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:15,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:15,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:16:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122729952] [2023-08-26 15:16:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:15,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:16:15,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:16:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:16:15,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 171 [2023-08-26 15:16:15,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:15,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:15,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 171 [2023-08-26 15:16:15,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:15,924 INFO L124 PetriNetUnfolderBase]: 164/284 cut-off events. [2023-08-26 15:16:15,924 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:16:15,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 284 events. 164/284 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1127 event pairs, 164 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 574. Up to 271 conditions per place. [2023-08-26 15:16:15,928 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 15:16:15,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 15:16:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:16:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:16:15,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 196 transitions. [2023-08-26 15:16:15,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5730994152046783 [2023-08-26 15:16:15,946 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 196 transitions. [2023-08-26 15:16:15,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 196 transitions. [2023-08-26 15:16:15,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:15,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 196 transitions. [2023-08-26 15:16:15,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 98.0) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:15,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:15,962 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:15,964 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 55 flow. Second operand 2 states and 196 transitions. [2023-08-26 15:16:15,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 15:16:15,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:16:15,968 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 15:16:15,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 15:16:15,972 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 15:16:15,973 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 15:16:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 88.5) internal successors, (177), 2 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:15,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:15,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:16:15,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:15,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 447086169, now seen corresponding path program 1 times [2023-08-26 15:16:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644935511] [2023-08-26 15:16:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:15,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:16,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:16,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644935511] [2023-08-26 15:16:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644935511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:16,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:16,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:16:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998938228] [2023-08-26 15:16:16,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:16:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:16:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:16:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:16,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:16,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:16,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:16,479 INFO L124 PetriNetUnfolderBase]: 557/896 cut-off events. [2023-08-26 15:16:16,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:16:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 896 events. 557/896 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3885 event pairs, 184 based on Foata normal form. 42/938 useless extension candidates. Maximal degree in co-relation 1846. Up to 579 conditions per place. [2023-08-26 15:16:16,488 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 25 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 15:16:16,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 134 flow [2023-08-26 15:16:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:16:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:16:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 15:16:16,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-26 15:16:16,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 15:16:16,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 15:16:16,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:16,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 15:16:16,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,500 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,500 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 266 transitions. [2023-08-26 15:16:16,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 134 flow [2023-08-26 15:16:16,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 31 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:16:16,504 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 86 flow [2023-08-26 15:16:16,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-08-26 15:16:16,505 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-26 15:16:16,505 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 86 flow [2023-08-26 15:16:16,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:16,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:16,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:16:16,510 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:16,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:16,512 INFO L85 PathProgramCache]: Analyzing trace with hash 974768376, now seen corresponding path program 1 times [2023-08-26 15:16:16,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:16,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284896490] [2023-08-26 15:16:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:16,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:16,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284896490] [2023-08-26 15:16:16,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284896490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:16,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:16,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:16:16,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81503005] [2023-08-26 15:16:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:16,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:16:16,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:16:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:16:16,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 171 [2023-08-26 15:16:16,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:16,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 171 [2023-08-26 15:16:16,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:16,711 INFO L124 PetriNetUnfolderBase]: 355/626 cut-off events. [2023-08-26 15:16:16,711 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-26 15:16:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 626 events. 355/626 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2954 event pairs, 120 based on Foata normal form. 8/605 useless extension candidates. Maximal degree in co-relation 1576. Up to 359 conditions per place. [2023-08-26 15:16:16,715 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 18 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-26 15:16:16,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 142 flow [2023-08-26 15:16:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:16:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:16:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 15:16:16,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360623781676414 [2023-08-26 15:16:16,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 15:16:16,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 15:16:16,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:16,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 15:16:16,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,720 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 86 flow. Second operand 3 states and 275 transitions. [2023-08-26 15:16:16,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 142 flow [2023-08-26 15:16:16,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 128 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:16:16,723 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 85 flow [2023-08-26 15:16:16,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-26 15:16:16,723 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-08-26 15:16:16,724 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 85 flow [2023-08-26 15:16:16,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:16,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:16:16,724 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:16,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash 153045687, now seen corresponding path program 1 times [2023-08-26 15:16:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:16,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689155605] [2023-08-26 15:16:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689155605] [2023-08-26 15:16:16,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689155605] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:16,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:16,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:16:16,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092913634] [2023-08-26 15:16:16,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:16,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:16:16,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:16:16,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:16:16,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:16,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:16,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:16,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:16,950 INFO L124 PetriNetUnfolderBase]: 488/791 cut-off events. [2023-08-26 15:16:16,950 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2023-08-26 15:16:16,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 791 events. 488/791 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3224 event pairs, 89 based on Foata normal form. 6/797 useless extension candidates. Maximal degree in co-relation 2104. Up to 422 conditions per place. [2023-08-26 15:16:16,956 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 31 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2023-08-26 15:16:16,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 231 flow [2023-08-26 15:16:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:16:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:16:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-08-26 15:16:16,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2023-08-26 15:16:16,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-08-26 15:16:16,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-08-26 15:16:16,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:16,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-08-26 15:16:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,961 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 85 flow. Second operand 4 states and 350 transitions. [2023-08-26 15:16:16,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 231 flow [2023-08-26 15:16:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:16:16,964 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 154 flow [2023-08-26 15:16:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-26 15:16:16,965 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-26 15:16:16,966 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 154 flow [2023-08-26 15:16:16,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:16,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:16,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:16,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:16:16,966 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:16,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:16,967 INFO L85 PathProgramCache]: Analyzing trace with hash 152121856, now seen corresponding path program 1 times [2023-08-26 15:16:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690194718] [2023-08-26 15:16:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:17,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:17,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690194718] [2023-08-26 15:16:17,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690194718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:17,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:17,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:16:17,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039388340] [2023-08-26 15:16:17,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:17,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:16:17,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:17,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:16:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:16:17,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:17,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:17,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:17,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:17,147 INFO L124 PetriNetUnfolderBase]: 466/757 cut-off events. [2023-08-26 15:16:17,148 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2023-08-26 15:16:17,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2353 conditions, 757 events. 466/757 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3100 event pairs, 105 based on Foata normal form. 8/765 useless extension candidates. Maximal degree in co-relation 2345. Up to 456 conditions per place. [2023-08-26 15:16:17,153 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 36 selfloop transitions, 12 changer transitions 0/48 dead transitions. [2023-08-26 15:16:17,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 323 flow [2023-08-26 15:16:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:16:17,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:16:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-08-26 15:16:17,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-08-26 15:16:17,154 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-08-26 15:16:17,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-08-26 15:16:17,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:17,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-08-26 15:16:17,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,157 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,157 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 154 flow. Second operand 4 states and 352 transitions. [2023-08-26 15:16:17,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 323 flow [2023-08-26 15:16:17,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 48 transitions, 323 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:16:17,162 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 234 flow [2023-08-26 15:16:17,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-26 15:16:17,165 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 15:16:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 234 flow [2023-08-26 15:16:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.5) internal successors, (322), 4 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:17,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:17,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:16:17,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:17,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 420847395, now seen corresponding path program 1 times [2023-08-26 15:16:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654483896] [2023-08-26 15:16:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:17,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:17,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:17,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654483896] [2023-08-26 15:16:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654483896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:17,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:16:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597834840] [2023-08-26 15:16:17,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:17,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:16:17,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:16:17,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:16:17,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:17,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:17,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:17,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:17,434 INFO L124 PetriNetUnfolderBase]: 614/1013 cut-off events. [2023-08-26 15:16:17,434 INFO L125 PetriNetUnfolderBase]: For 2241/2241 co-relation queries the response was YES. [2023-08-26 15:16:17,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3504 conditions, 1013 events. 614/1013 cut-off events. For 2241/2241 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4529 event pairs, 163 based on Foata normal form. 28/1041 useless extension candidates. Maximal degree in co-relation 3493. Up to 434 conditions per place. [2023-08-26 15:16:17,440 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 31 selfloop transitions, 9 changer transitions 15/55 dead transitions. [2023-08-26 15:16:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 448 flow [2023-08-26 15:16:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:16:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:16:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 435 transitions. [2023-08-26 15:16:17,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5087719298245614 [2023-08-26 15:16:17,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 435 transitions. [2023-08-26 15:16:17,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 435 transitions. [2023-08-26 15:16:17,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:17,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 435 transitions. [2023-08-26 15:16:17,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,447 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,447 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 234 flow. Second operand 5 states and 435 transitions. [2023-08-26 15:16:17,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 448 flow [2023-08-26 15:16:17,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 444 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:16:17,457 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 192 flow [2023-08-26 15:16:17,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-08-26 15:16:17,459 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-08-26 15:16:17,461 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 192 flow [2023-08-26 15:16:17,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:17,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:17,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:16:17,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:17,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:17,463 INFO L85 PathProgramCache]: Analyzing trace with hash 420809265, now seen corresponding path program 2 times [2023-08-26 15:16:17,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:17,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674744194] [2023-08-26 15:16:17,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:17,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:17,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:17,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674744194] [2023-08-26 15:16:17,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674744194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:17,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:17,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:16:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15718821] [2023-08-26 15:16:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:16:17,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:16:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:16:17,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:17,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 25 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:17,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:17,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:17,698 INFO L124 PetriNetUnfolderBase]: 350/587 cut-off events. [2023-08-26 15:16:17,698 INFO L125 PetriNetUnfolderBase]: For 1470/1470 co-relation queries the response was YES. [2023-08-26 15:16:17,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2108 conditions, 587 events. 350/587 cut-off events. For 1470/1470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2402 event pairs, 101 based on Foata normal form. 30/617 useless extension candidates. Maximal degree in co-relation 2095. Up to 350 conditions per place. [2023-08-26 15:16:17,702 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 25 selfloop transitions, 8 changer transitions 10/43 dead transitions. [2023-08-26 15:16:17,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 365 flow [2023-08-26 15:16:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:16:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:16:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2023-08-26 15:16:17,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005847953216375 [2023-08-26 15:16:17,704 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2023-08-26 15:16:17,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2023-08-26 15:16:17,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:17,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2023-08-26 15:16:17,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,707 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,707 INFO L175 Difference]: Start difference. First operand has 44 places, 25 transitions, 192 flow. Second operand 5 states and 428 transitions. [2023-08-26 15:16:17,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 365 flow [2023-08-26 15:16:17,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 288 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-26 15:16:17,713 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 149 flow [2023-08-26 15:16:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2023-08-26 15:16:17,714 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-08-26 15:16:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 149 flow [2023-08-26 15:16:17,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:17,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:16:17,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:17,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1687136485, now seen corresponding path program 1 times [2023-08-26 15:16:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:17,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123775069] [2023-08-26 15:16:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:17,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:17,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123775069] [2023-08-26 15:16:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123775069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:16:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110321495] [2023-08-26 15:16:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:17,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:16:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:16:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:16:17,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:17,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:17,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:17,887 INFO L124 PetriNetUnfolderBase]: 163/278 cut-off events. [2023-08-26 15:16:17,887 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2023-08-26 15:16:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 278 events. 163/278 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 871 event pairs, 39 based on Foata normal form. 6/284 useless extension candidates. Maximal degree in co-relation 955. Up to 133 conditions per place. [2023-08-26 15:16:17,889 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 25 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-26 15:16:17,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 30 transitions, 227 flow [2023-08-26 15:16:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:16:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:16:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2023-08-26 15:16:17,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49415204678362573 [2023-08-26 15:16:17,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 338 transitions. [2023-08-26 15:16:17,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 338 transitions. [2023-08-26 15:16:17,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:17,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 338 transitions. [2023-08-26 15:16:17,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.5) internal successors, (338), 4 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,893 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 149 flow. Second operand 4 states and 338 transitions. [2023-08-26 15:16:17,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 30 transitions, 227 flow [2023-08-26 15:16:17,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 204 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 15:16:17,896 INFO L231 Difference]: Finished difference. Result has 40 places, 23 transitions, 142 flow [2023-08-26 15:16:17,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=40, PETRI_TRANSITIONS=23} [2023-08-26 15:16:17,896 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-26 15:16:17,897 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 23 transitions, 142 flow [2023-08-26 15:16:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:17,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:17,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:16:17,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:17,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -761568069, now seen corresponding path program 1 times [2023-08-26 15:16:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416608060] [2023-08-26 15:16:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:17,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:17,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416608060] [2023-08-26 15:16:17,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416608060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:17,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:17,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:16:17,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522606021] [2023-08-26 15:16:17,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:17,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:16:17,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:17,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:16:17,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:16:17,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2023-08-26 15:16:17,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 23 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:17,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:17,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2023-08-26 15:16:17,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:18,063 INFO L124 PetriNetUnfolderBase]: 191/330 cut-off events. [2023-08-26 15:16:18,063 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2023-08-26 15:16:18,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 330 events. 191/330 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1115 event pairs, 35 based on Foata normal form. 12/342 useless extension candidates. Maximal degree in co-relation 1069. Up to 110 conditions per place. [2023-08-26 15:16:18,065 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 19 selfloop transitions, 3 changer transitions 17/39 dead transitions. [2023-08-26 15:16:18,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 260 flow [2023-08-26 15:16:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:16:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:16:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 505 transitions. [2023-08-26 15:16:18,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4922027290448343 [2023-08-26 15:16:18,067 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 505 transitions. [2023-08-26 15:16:18,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 505 transitions. [2023-08-26 15:16:18,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:18,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 505 transitions. [2023-08-26 15:16:18,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.16666666666667) internal successors, (505), 6 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,070 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,070 INFO L175 Difference]: Start difference. First operand has 40 places, 23 transitions, 142 flow. Second operand 6 states and 505 transitions. [2023-08-26 15:16:18,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 260 flow [2023-08-26 15:16:18,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 250 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:16:18,073 INFO L231 Difference]: Finished difference. Result has 43 places, 17 transitions, 84 flow [2023-08-26 15:16:18,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=84, PETRI_PLACES=43, PETRI_TRANSITIONS=17} [2023-08-26 15:16:18,074 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-26 15:16:18,074 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 17 transitions, 84 flow [2023-08-26 15:16:18,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:18,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:18,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:16:18,075 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:18,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash -761663859, now seen corresponding path program 2 times [2023-08-26 15:16:18,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:18,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412126306] [2023-08-26 15:16:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:18,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:18,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:18,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412126306] [2023-08-26 15:16:18,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412126306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:18,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:18,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:16:18,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216422961] [2023-08-26 15:16:18,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:18,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:16:18,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:16:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:16:18,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2023-08-26 15:16:18,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 17 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:18,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2023-08-26 15:16:18,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:18,226 INFO L124 PetriNetUnfolderBase]: 56/123 cut-off events. [2023-08-26 15:16:18,226 INFO L125 PetriNetUnfolderBase]: For 317/318 co-relation queries the response was YES. [2023-08-26 15:16:18,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 123 events. 56/123 cut-off events. For 317/318 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 385 event pairs, 23 based on Foata normal form. 10/129 useless extension candidates. Maximal degree in co-relation 362. Up to 73 conditions per place. [2023-08-26 15:16:18,227 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 17 selfloop transitions, 4 changer transitions 12/36 dead transitions. [2023-08-26 15:16:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 220 flow [2023-08-26 15:16:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:16:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:16:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2023-08-26 15:16:18,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2023-08-26 15:16:18,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2023-08-26 15:16:18,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2023-08-26 15:16:18,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:18,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2023-08-26 15:16:18,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,232 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,232 INFO L175 Difference]: Start difference. First operand has 43 places, 17 transitions, 84 flow. Second operand 5 states and 440 transitions. [2023-08-26 15:16:18,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 220 flow [2023-08-26 15:16:18,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 172 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-08-26 15:16:18,233 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 90 flow [2023-08-26 15:16:18,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-26 15:16:18,235 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-26 15:16:18,235 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 90 flow [2023-08-26 15:16:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.75) internal successors, (335), 4 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:18,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:16:18,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:18,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash 730212254, now seen corresponding path program 1 times [2023-08-26 15:16:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:18,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365328957] [2023-08-26 15:16:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:18,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:18,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:18,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365328957] [2023-08-26 15:16:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365328957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:18,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:18,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:16:18,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112218195] [2023-08-26 15:16:18,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:16:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:16:18,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:16:18,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2023-08-26 15:16:18,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:18,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2023-08-26 15:16:18,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:18,443 INFO L124 PetriNetUnfolderBase]: 32/82 cut-off events. [2023-08-26 15:16:18,443 INFO L125 PetriNetUnfolderBase]: For 154/171 co-relation queries the response was YES. [2023-08-26 15:16:18,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 82 events. 32/82 cut-off events. For 154/171 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 215 event pairs, 5 based on Foata normal form. 14/94 useless extension candidates. Maximal degree in co-relation 294. Up to 48 conditions per place. [2023-08-26 15:16:18,444 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 18 selfloop transitions, 7 changer transitions 10/38 dead transitions. [2023-08-26 15:16:18,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 250 flow [2023-08-26 15:16:18,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:16:18,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:16:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 523 transitions. [2023-08-26 15:16:18,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097465886939572 [2023-08-26 15:16:18,446 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 523 transitions. [2023-08-26 15:16:18,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 523 transitions. [2023-08-26 15:16:18,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:18,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 523 transitions. [2023-08-26 15:16:18,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.16666666666667) internal successors, (523), 6 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,450 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,450 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 90 flow. Second operand 6 states and 523 transitions. [2023-08-26 15:16:18,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 250 flow [2023-08-26 15:16:18,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 244 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 15:16:18,452 INFO L231 Difference]: Finished difference. Result has 39 places, 23 transitions, 140 flow [2023-08-26 15:16:18,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=140, PETRI_PLACES=39, PETRI_TRANSITIONS=23} [2023-08-26 15:16:18,453 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-26 15:16:18,453 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 23 transitions, 140 flow [2023-08-26 15:16:18,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.4) internal successors, (417), 5 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:18,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:18,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:16:18,454 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:18,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:18,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1125933022, now seen corresponding path program 1 times [2023-08-26 15:16:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:18,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82131545] [2023-08-26 15:16:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82131545] [2023-08-26 15:16:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82131545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:18,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:18,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:16:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800655742] [2023-08-26 15:16:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:18,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:16:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:16:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:16:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 171 [2023-08-26 15:16:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 23 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 171 [2023-08-26 15:16:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:18,624 INFO L124 PetriNetUnfolderBase]: 17/53 cut-off events. [2023-08-26 15:16:18,625 INFO L125 PetriNetUnfolderBase]: For 170/182 co-relation queries the response was YES. [2023-08-26 15:16:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 53 events. 17/53 cut-off events. For 170/182 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 94 event pairs, 2 based on Foata normal form. 10/62 useless extension candidates. Maximal degree in co-relation 215. Up to 28 conditions per place. [2023-08-26 15:16:18,625 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 15 selfloop transitions, 10 changer transitions 5/33 dead transitions. [2023-08-26 15:16:18,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 260 flow [2023-08-26 15:16:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:16:18,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:16:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 599 transitions. [2023-08-26 15:16:18,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004177109440268 [2023-08-26 15:16:18,628 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 599 transitions. [2023-08-26 15:16:18,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 599 transitions. [2023-08-26 15:16:18,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:18,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 599 transitions. [2023-08-26 15:16:18,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.57142857142857) internal successors, (599), 7 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,632 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,632 INFO L175 Difference]: Start difference. First operand has 39 places, 23 transitions, 140 flow. Second operand 7 states and 599 transitions. [2023-08-26 15:16:18,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 260 flow [2023-08-26 15:16:18,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 222 flow, removed 15 selfloop flow, removed 4 redundant places. [2023-08-26 15:16:18,635 INFO L231 Difference]: Finished difference. Result has 42 places, 23 transitions, 140 flow [2023-08-26 15:16:18,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=42, PETRI_TRANSITIONS=23} [2023-08-26 15:16:18,635 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 9 predicate places. [2023-08-26 15:16:18,636 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 23 transitions, 140 flow [2023-08-26 15:16:18,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 83.16666666666667) internal successors, (499), 6 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:16:18,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:18,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 15:16:18,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 15:16:18,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:16:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash 252227565, now seen corresponding path program 1 times [2023-08-26 15:16:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:16:18,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554948542] [2023-08-26 15:16:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:16:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:16:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:16:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:16:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:16:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554948542] [2023-08-26 15:16:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554948542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:16:18,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:16:18,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:16:18,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499683954] [2023-08-26 15:16:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:16:18,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:16:18,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:16:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:16:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:16:18,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2023-08-26 15:16:18,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 23 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:16:18,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2023-08-26 15:16:18,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:16:18,771 INFO L124 PetriNetUnfolderBase]: 21/55 cut-off events. [2023-08-26 15:16:18,771 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-08-26 15:16:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 55 events. 21/55 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 4 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 210. Up to 35 conditions per place. [2023-08-26 15:16:18,772 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-26 15:16:18,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 220 flow [2023-08-26 15:16:18,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:16:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:16:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 401 transitions. [2023-08-26 15:16:18,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46900584795321637 [2023-08-26 15:16:18,773 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 401 transitions. [2023-08-26 15:16:18,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 401 transitions. [2023-08-26 15:16:18,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:16:18,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 401 transitions. [2023-08-26 15:16:18,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,776 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,776 INFO L175 Difference]: Start difference. First operand has 42 places, 23 transitions, 140 flow. Second operand 5 states and 401 transitions. [2023-08-26 15:16:18,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 220 flow [2023-08-26 15:16:18,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 180 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 15:16:18,777 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-26 15:16:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-26 15:16:18,778 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 15:16:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-26 15:16:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 15:16:18,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 15:16:18,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 15:16:18,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 15:16:18,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 15:16:18,782 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 15:16:18,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 15:16:18,782 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:16:18,785 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:16:18,785 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:16:18,787 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:16:18 BasicIcfg [2023-08-26 15:16:18,788 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:16:18,788 INFO L158 Benchmark]: Toolchain (without parser) took 6433.46ms. Allocated memory was 348.1MB in the beginning and 457.2MB in the end (delta: 109.1MB). Free memory was 323.2MB in the beginning and 197.7MB in the end (delta: 125.5MB). Peak memory consumption was 235.2MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,788 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:16:18,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 453.10ms. Allocated memory is still 348.1MB. Free memory was 323.2MB in the beginning and 302.9MB in the end (delta: 20.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,789 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.74ms. Allocated memory is still 348.1MB. Free memory was 302.9MB in the beginning and 300.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,789 INFO L158 Benchmark]: Boogie Preprocessor took 34.65ms. Allocated memory is still 348.1MB. Free memory was 300.9MB in the beginning and 299.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,789 INFO L158 Benchmark]: RCFGBuilder took 407.27ms. Allocated memory is still 348.1MB. Free memory was 299.3MB in the beginning and 284.6MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,789 INFO L158 Benchmark]: TraceAbstraction took 5475.02ms. Allocated memory was 348.1MB in the beginning and 457.2MB in the end (delta: 109.1MB). Free memory was 284.2MB in the beginning and 197.7MB in the end (delta: 86.4MB). Peak memory consumption was 197.4MB. Max. memory is 16.0GB. [2023-08-26 15:16:18,790 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 348.1MB. Free memory is still 324.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 453.10ms. Allocated memory is still 348.1MB. Free memory was 323.2MB in the beginning and 302.9MB in the end (delta: 20.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.74ms. Allocated memory is still 348.1MB. Free memory was 302.9MB in the beginning and 300.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.65ms. Allocated memory is still 348.1MB. Free memory was 300.9MB in the beginning and 299.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 407.27ms. Allocated memory is still 348.1MB. Free memory was 299.3MB in the beginning and 284.6MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5475.02ms. Allocated memory was 348.1MB in the beginning and 457.2MB in the end (delta: 109.1MB). Free memory was 284.2MB in the beginning and 197.7MB in the end (delta: 86.4MB). Peak memory consumption was 197.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 87 PlacesBefore, 33 PlacesAfterwards, 78 TransitionsBefore, 23 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 5 FixpointIterations, 30 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 76 TotalNumberOfCompositions, 2223 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1114, independent: 1035, independent conditional: 0, independent unconditional: 1035, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 626, independent: 594, independent conditional: 0, independent unconditional: 594, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1114, independent: 441, independent conditional: 0, independent unconditional: 441, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 626, unknown conditional: 0, unknown unconditional: 626] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 17]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 117 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.4s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 191 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 191 mSDsluCounter, 36 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 524 IncrementalHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 26 mSDtfsCounter, 524 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=5, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 144 NumberOfCodeBlocks, 144 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:16:18,810 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...