/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:29:25,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:29:25,788 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:29:25,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:29:25,798 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:29:25,831 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:29:25,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:29:25,831 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:29:25,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:29:25,834 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:29:25,835 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:29:25,835 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:29:25,835 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:29:25,835 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:29:25,835 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:29:25,836 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:29:25,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:29:25,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:29:25,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:29:25,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:29:25,839 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:29:25,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:29:25,839 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:29:25,839 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:29:25,839 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:29:25,840 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:29:25,840 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:29:25,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:29:25,840 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:29:25,840 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:29:25,841 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:29:26,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:29:26,066 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:29:26,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:29:26,068 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:29:26,068 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:29:26,069 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2023-08-26 18:29:26,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:29:27,195 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:29:27,195 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2023-08-26 18:29:27,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e66427e2/9bb29c142e2948fea4ad1ab6a85b6d47/FLAG168a54800 [2023-08-26 18:29:27,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e66427e2/9bb29c142e2948fea4ad1ab6a85b6d47 [2023-08-26 18:29:27,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:29:27,219 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:29:27,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:29:27,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:29:27,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:29:27,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7115e1e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27, skipping insertion in model container [2023-08-26 18:29:27,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,258 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:29:27,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:29:27,435 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:29:27,448 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:29:27,449 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-26 18:29:27,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:29:27,479 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:29:27,479 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 18:29:27,484 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:29:27,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27 WrapperNode [2023-08-26 18:29:27,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:29:27,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:29:27,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:29:27,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:29:27,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,515 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2023-08-26 18:29:27,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:29:27,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:29:27,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:29:27,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:29:27,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,522 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,544 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:29:27,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:29:27,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:29:27,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:29:27,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (1/1) ... [2023-08-26 18:29:27,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:29:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:29:27,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:29:27,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:29:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:29:27,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 18:29:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:29:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:29:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:29:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-26 18:29:27,612 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-26 18:29:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-26 18:29:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-26 18:29:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-26 18:29:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-26 18:29:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:29:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 18:29:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:29:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:29:27,615 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:29:27,747 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:29:27,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:29:27,918 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:29:27,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:29:27,924 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:29:27,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:27 BoogieIcfgContainer [2023-08-26 18:29:27,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:29:27,928 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:29:27,928 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:29:27,930 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:29:27,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:29:27" (1/3) ... [2023-08-26 18:29:27,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7862d8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:27, skipping insertion in model container [2023-08-26 18:29:27,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:29:27" (2/3) ... [2023-08-26 18:29:27,931 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7862d8e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:29:27, skipping insertion in model container [2023-08-26 18:29:27,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:29:27" (3/3) ... [2023-08-26 18:29:27,932 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2023-08-26 18:29:27,943 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:29:27,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-26 18:29:27,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:29:27,993 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:29:28,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 94 transitions, 203 flow [2023-08-26 18:29:28,050 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-08-26 18:29:28,050 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:28,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 91 events. 3/91 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. 0/81 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2023-08-26 18:29:28,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 94 transitions, 203 flow [2023-08-26 18:29:28,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 77 transitions, 163 flow [2023-08-26 18:29:28,058 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:29:28,067 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 77 transitions, 163 flow [2023-08-26 18:29:28,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 77 transitions, 163 flow [2023-08-26 18:29:28,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 77 transitions, 163 flow [2023-08-26 18:29:28,082 INFO L124 PetriNetUnfolderBase]: 1/77 cut-off events. [2023-08-26 18:29:28,082 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:28,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 77 events. 1/77 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. 0/70 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2023-08-26 18:29:28,083 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-26 18:29:29,866 INFO L134 LiptonReduction]: Checked pairs total: 2389 [2023-08-26 18:29:29,866 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-26 18:29:29,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:29:29,879 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;@16575104, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:29:29,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 18:29:29,880 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:29:29,880 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:29:29,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:29,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:29,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:29:29,881 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 18:29:29,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash 318, now seen corresponding path program 1 times [2023-08-26 18:29:29,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:29,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812610919] [2023-08-26 18:29:29,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:29,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:29,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:29,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812610919] [2023-08-26 18:29:29,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812610919] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:29,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:29:29,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682104171] [2023-08-26 18:29:29,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:29:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:29,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:29:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:29:29,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 161 [2023-08-26 18:29:29,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:29,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:29,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 161 [2023-08-26 18:29:29,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:30,067 INFO L124 PetriNetUnfolderBase]: 164/293 cut-off events. [2023-08-26 18:29:30,067 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:29:30,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 293 events. 164/293 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1198 event pairs, 164 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 583. Up to 271 conditions per place. [2023-08-26 18:29:30,072 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 18:29:30,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 71 flow [2023-08-26 18:29:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:29:30,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:29:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 194 transitions. [2023-08-26 18:29:30,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2023-08-26 18:29:30,083 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 194 transitions. [2023-08-26 18:29:30,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 194 transitions. [2023-08-26 18:29:30,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:30,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 194 transitions. [2023-08-26 18:29:30,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,090 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,091 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 55 flow. Second operand 2 states and 194 transitions. [2023-08-26 18:29:30,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 71 flow [2023-08-26 18:29:30,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 68 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 18:29:30,094 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2023-08-26 18:29:30,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 18:29:30,097 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -8 predicate places. [2023-08-26 18:29:30,098 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2023-08-26 18:29:30,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:30,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:30,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:29:30,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:30,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:30,099 INFO L85 PathProgramCache]: Analyzing trace with hash -940790540, now seen corresponding path program 1 times [2023-08-26 18:29:30,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:30,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882085098] [2023-08-26 18:29:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:30,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:30,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882085098] [2023-08-26 18:29:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882085098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:30,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:30,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:29:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248601495] [2023-08-26 18:29:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:30,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:30,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 161 [2023-08-26 18:29:30,354 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 18:29:30,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:30,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 161 [2023-08-26 18:29:30,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:30,436 INFO L124 PetriNetUnfolderBase]: 573/928 cut-off events. [2023-08-26 18:29:30,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:29:30,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 928 events. 573/928 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4155 event pairs, 207 based on Foata normal form. 50/978 useless extension candidates. Maximal degree in co-relation 1910. Up to 539 conditions per place. [2023-08-26 18:29:30,442 INFO L140 encePairwiseOnDemand]: 154/161 looper letters, 25 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-08-26 18:29:30,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 134 flow [2023-08-26 18:29:30,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 18:29:30,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-08-26 18:29:30,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 18:29:30,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 18:29:30,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:30,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 18:29:30,451 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 18:29:30,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,453 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 266 transitions. [2023-08-26 18:29:30,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 134 flow [2023-08-26 18:29:30,454 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 18:29:30,456 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 86 flow [2023-08-26 18:29:30,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, 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 18:29:30,457 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-26 18:29:30,458 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 86 flow [2023-08-26 18:29:30,458 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 18:29:30,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:30,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:30,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:29:30,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:30,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 900263625, now seen corresponding path program 1 times [2023-08-26 18:29:30,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:30,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77544229] [2023-08-26 18:29:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:30,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77544229] [2023-08-26 18:29:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77544229] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:29:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351737571] [2023-08-26 18:29:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:30,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-26 18:29:30,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:30,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-26 18:29:30,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:30,664 INFO L124 PetriNetUnfolderBase]: 409/731 cut-off events. [2023-08-26 18:29:30,664 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2023-08-26 18:29:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1916 conditions, 731 events. 409/731 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3521 event pairs, 136 based on Foata normal form. 4/719 useless extension candidates. Maximal degree in co-relation 1911. Up to 564 conditions per place. [2023-08-26 18:29:30,668 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 23 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-26 18:29:30,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 180 flow [2023-08-26 18:29:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-26 18:29:30,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2023-08-26 18:29:30,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-26 18:29:30,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-26 18:29:30,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:30,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-26 18:29:30,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,672 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 86 flow. Second operand 3 states and 273 transitions. [2023-08-26 18:29:30,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 180 flow [2023-08-26 18:29:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 162 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:29:30,676 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 115 flow [2023-08-26 18:29:30,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-08-26 18:29:30,677 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2023-08-26 18:29:30,677 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 115 flow [2023-08-26 18:29:30,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:30,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:30,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:29:30,680 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:30,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash 900263563, now seen corresponding path program 1 times [2023-08-26 18:29:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916370996] [2023-08-26 18:29:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:30,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:30,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916370996] [2023-08-26 18:29:30,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916370996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:30,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:30,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:29:30,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890719320] [2023-08-26 18:29:30,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:30,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:30,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:30,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:30,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-26 18:29:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-26 18:29:30,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:30,843 INFO L124 PetriNetUnfolderBase]: 418/732 cut-off events. [2023-08-26 18:29:30,843 INFO L125 PetriNetUnfolderBase]: For 251/255 co-relation queries the response was YES. [2023-08-26 18:29:30,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 732 events. 418/732 cut-off events. For 251/255 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3377 event pairs, 120 based on Foata normal form. 4/726 useless extension candidates. Maximal degree in co-relation 1863. Up to 586 conditions per place. [2023-08-26 18:29:30,847 INFO L140 encePairwiseOnDemand]: 157/161 looper letters, 26 selfloop transitions, 5 changer transitions 0/37 dead transitions. [2023-08-26 18:29:30,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 37 transitions, 213 flow [2023-08-26 18:29:30,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 18:29:30,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5693581780538303 [2023-08-26 18:29:30,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 18:29:30,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 18:29:30,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:30,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 18:29:30,849 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 18:29:30,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,850 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,850 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 115 flow. Second operand 3 states and 275 transitions. [2023-08-26 18:29:30,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 37 transitions, 213 flow [2023-08-26 18:29:30,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:30,852 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 145 flow [2023-08-26 18:29:30,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-26 18:29:30,853 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-26 18:29:30,853 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 145 flow [2023-08-26 18:29:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:30,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:29:30,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:30,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:30,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2138367830, now seen corresponding path program 1 times [2023-08-26 18:29:30,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:30,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392924647] [2023-08-26 18:29:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:30,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392924647] [2023-08-26 18:29:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392924647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:30,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:30,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:30,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153643356] [2023-08-26 18:29:30,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 161 [2023-08-26 18:29:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:30,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:30,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 161 [2023-08-26 18:29:30,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:31,022 INFO L124 PetriNetUnfolderBase]: 321/613 cut-off events. [2023-08-26 18:29:31,022 INFO L125 PetriNetUnfolderBase]: For 732/800 co-relation queries the response was YES. [2023-08-26 18:29:31,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1668 conditions, 613 events. 321/613 cut-off events. For 732/800 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3258 event pairs, 56 based on Foata normal form. 63/649 useless extension candidates. Maximal degree in co-relation 1661. Up to 330 conditions per place. [2023-08-26 18:29:31,025 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 41 selfloop transitions, 8 changer transitions 6/65 dead transitions. [2023-08-26 18:29:31,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 65 transitions, 413 flow [2023-08-26 18:29:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:29:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:29:31,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 439 transitions. [2023-08-26 18:29:31,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5453416149068323 [2023-08-26 18:29:31,026 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 439 transitions. [2023-08-26 18:29:31,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 439 transitions. [2023-08-26 18:29:31,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:31,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 439 transitions. [2023-08-26 18:29:31,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,029 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,029 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 145 flow. Second operand 5 states and 439 transitions. [2023-08-26 18:29:31,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 65 transitions, 413 flow [2023-08-26 18:29:31,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 65 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:31,031 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 200 flow [2023-08-26 18:29:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-26 18:29:31,032 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-26 18:29:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 200 flow [2023-08-26 18:29:31,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 4 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:31,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:31,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:29:31,032 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:31,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1738334933, now seen corresponding path program 1 times [2023-08-26 18:29:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:31,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541610397] [2023-08-26 18:29:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:31,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:31,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541610397] [2023-08-26 18:29:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541610397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:31,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:31,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:29:31,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088215457] [2023-08-26 18:29:31,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:31,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:29:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:31,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:29:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:29:31,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 161 [2023-08-26 18:29:31,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:31,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 161 [2023-08-26 18:29:31,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:31,213 INFO L124 PetriNetUnfolderBase]: 275/551 cut-off events. [2023-08-26 18:29:31,213 INFO L125 PetriNetUnfolderBase]: For 1158/1335 co-relation queries the response was YES. [2023-08-26 18:29:31,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 551 events. 275/551 cut-off events. For 1158/1335 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3013 event pairs, 22 based on Foata normal form. 126/652 useless extension candidates. Maximal degree in co-relation 1984. Up to 251 conditions per place. [2023-08-26 18:29:31,216 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 47 selfloop transitions, 15 changer transitions 10/82 dead transitions. [2023-08-26 18:29:31,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 82 transitions, 580 flow [2023-08-26 18:29:31,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:29:31,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:29:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 614 transitions. [2023-08-26 18:29:31,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448092280390417 [2023-08-26 18:29:31,218 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 614 transitions. [2023-08-26 18:29:31,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 614 transitions. [2023-08-26 18:29:31,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:31,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 614 transitions. [2023-08-26 18:29:31,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,222 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,222 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 200 flow. Second operand 7 states and 614 transitions. [2023-08-26 18:29:31,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 82 transitions, 580 flow [2023-08-26 18:29:31,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 82 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:29:31,225 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 295 flow [2023-08-26 18:29:31,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=295, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-26 18:29:31,227 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2023-08-26 18:29:31,227 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 295 flow [2023-08-26 18:29:31,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:31,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:31,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:29:31,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:31,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2142688484, now seen corresponding path program 1 times [2023-08-26 18:29:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:31,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224812832] [2023-08-26 18:29:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:31,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:31,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224812832] [2023-08-26 18:29:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224812832] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:31,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:29:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563685384] [2023-08-26 18:29:31,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:29:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:29:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:29:31,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 161 [2023-08-26 18:29:31,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:31,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 161 [2023-08-26 18:29:31,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:31,454 INFO L124 PetriNetUnfolderBase]: 496/879 cut-off events. [2023-08-26 18:29:31,454 INFO L125 PetriNetUnfolderBase]: For 2568/2568 co-relation queries the response was YES. [2023-08-26 18:29:31,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3680 conditions, 879 events. 496/879 cut-off events. For 2568/2568 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4398 event pairs, 33 based on Foata normal form. 7/886 useless extension candidates. Maximal degree in co-relation 3667. Up to 534 conditions per place. [2023-08-26 18:29:31,457 INFO L140 encePairwiseOnDemand]: 153/161 looper letters, 46 selfloop transitions, 19 changer transitions 39/104 dead transitions. [2023-08-26 18:29:31,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 104 transitions, 936 flow [2023-08-26 18:29:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:29:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:29:31,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 430 transitions. [2023-08-26 18:29:31,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-08-26 18:29:31,458 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 430 transitions. [2023-08-26 18:29:31,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 430 transitions. [2023-08-26 18:29:31,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:31,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 430 transitions. [2023-08-26 18:29:31,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 86.0) internal successors, (430), 5 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,463 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 295 flow. Second operand 5 states and 430 transitions. [2023-08-26 18:29:31,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 104 transitions, 936 flow [2023-08-26 18:29:31,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 104 transitions, 819 flow, removed 44 selfloop flow, removed 2 redundant places. [2023-08-26 18:29:31,472 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 324 flow [2023-08-26 18:29:31,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-08-26 18:29:31,473 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-08-26 18:29:31,473 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 324 flow [2023-08-26 18:29:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 4 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:31,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:29:31,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:31,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:31,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1661351136, now seen corresponding path program 1 times [2023-08-26 18:29:31,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:31,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640431738] [2023-08-26 18:29:31,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:31,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:31,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640431738] [2023-08-26 18:29:31,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640431738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:31,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:31,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:29:31,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891760469] [2023-08-26 18:29:31,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:31,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:29:31,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:29:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:29:31,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 161 [2023-08-26 18:29:31,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:31,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 161 [2023-08-26 18:29:31,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:31,580 INFO L124 PetriNetUnfolderBase]: 166/392 cut-off events. [2023-08-26 18:29:31,580 INFO L125 PetriNetUnfolderBase]: For 1009/1025 co-relation queries the response was YES. [2023-08-26 18:29:31,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 392 events. 166/392 cut-off events. For 1009/1025 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1993 event pairs, 64 based on Foata normal form. 2/382 useless extension candidates. Maximal degree in co-relation 1677. Up to 234 conditions per place. [2023-08-26 18:29:31,582 INFO L140 encePairwiseOnDemand]: 158/161 looper letters, 31 selfloop transitions, 6 changer transitions 10/55 dead transitions. [2023-08-26 18:29:31,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 55 transitions, 490 flow [2023-08-26 18:29:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:29:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:29:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-26 18:29:31,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610766045548654 [2023-08-26 18:29:31,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-26 18:29:31,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-26 18:29:31,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:31,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-26 18:29:31,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,585 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,585 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 324 flow. Second operand 3 states and 271 transitions. [2023-08-26 18:29:31,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 55 transitions, 490 flow [2023-08-26 18:29:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 470 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-26 18:29:31,588 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 300 flow [2023-08-26 18:29:31,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-08-26 18:29:31,588 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2023-08-26 18:29:31,589 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 300 flow [2023-08-26 18:29:31,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:29:31,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:31,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:29:31,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 18:29:31,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:29:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash -903379534, now seen corresponding path program 2 times [2023-08-26 18:29:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:29:31,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573758199] [2023-08-26 18:29:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:29:31,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:29:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:29:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:29:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:29:31,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573758199] [2023-08-26 18:29:31,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573758199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:29:31,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:29:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:29:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279967504] [2023-08-26 18:29:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:29:31,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:29:31,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:29:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:29:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:29:31,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 161 [2023-08-26 18:29:31,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 300 flow. Second operand has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:29:31,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 161 [2023-08-26 18:29:31,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:29:31,738 INFO L124 PetriNetUnfolderBase]: 117/277 cut-off events. [2023-08-26 18:29:31,738 INFO L125 PetriNetUnfolderBase]: For 701/737 co-relation queries the response was YES. [2023-08-26 18:29:31,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 277 events. 117/277 cut-off events. For 701/737 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1316 event pairs, 12 based on Foata normal form. 26/292 useless extension candidates. Maximal degree in co-relation 1162. Up to 97 conditions per place. [2023-08-26 18:29:31,739 INFO L140 encePairwiseOnDemand]: 155/161 looper letters, 0 selfloop transitions, 0 changer transitions 63/63 dead transitions. [2023-08-26 18:29:31,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 574 flow [2023-08-26 18:29:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:29:31,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:29:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 599 transitions. [2023-08-26 18:29:31,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314995563442768 [2023-08-26 18:29:31,741 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 599 transitions. [2023-08-26 18:29:31,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 599 transitions. [2023-08-26 18:29:31,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:29:31,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 599 transitions. [2023-08-26 18:29:31,742 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 18:29:31,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 161.0) internal successors, (1288), 8 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,743 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 300 flow. Second operand 7 states and 599 transitions. [2023-08-26 18:29:31,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 574 flow [2023-08-26 18:29:31,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 508 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-26 18:29:31,745 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-26 18:29:31,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-26 18:29:31,746 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 14 predicate places. [2023-08-26 18:29:31,746 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-26 18:29:31,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 82.0) internal successors, (492), 6 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:29:31,748 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-08-26 18:29:31,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 18:29:31,749 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 18:29:31,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 18:29:31,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 18:29:31,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-08-26 18:29:31,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 18:29:31,750 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 10 remaining) [2023-08-26 18:29:31,751 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-08-26 18:29:31,751 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-08-26 18:29:31,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:29:31,752 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:29:31,754 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:29:31,754 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:29:31,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:29:31 BasicIcfg [2023-08-26 18:29:31,756 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:29:31,756 INFO L158 Benchmark]: Toolchain (without parser) took 4537.09ms. Allocated memory was 350.2MB in the beginning and 480.2MB in the end (delta: 130.0MB). Free memory was 325.8MB in the beginning and 431.9MB in the end (delta: -106.1MB). Peak memory consumption was 27.0MB. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 350.2MB. Free memory is still 326.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 264.16ms. Allocated memory is still 350.2MB. Free memory was 325.3MB in the beginning and 305.4MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.26ms. Allocated memory is still 350.2MB. Free memory was 304.9MB in the beginning and 303.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: Boogie Preprocessor took 34.90ms. Allocated memory is still 350.2MB. Free memory was 303.3MB in the beginning and 301.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: RCFGBuilder took 375.61ms. Allocated memory is still 350.2MB. Free memory was 301.7MB in the beginning and 287.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 18:29:31,757 INFO L158 Benchmark]: TraceAbstraction took 3828.07ms. Allocated memory was 350.2MB in the beginning and 480.2MB in the end (delta: 130.0MB). Free memory was 286.1MB in the beginning and 431.9MB in the end (delta: -145.9MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:29:31,759 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 350.2MB. Free memory is still 326.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 264.16ms. Allocated memory is still 350.2MB. Free memory was 325.3MB in the beginning and 305.4MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.26ms. Allocated memory is still 350.2MB. Free memory was 304.9MB in the beginning and 303.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.90ms. Allocated memory is still 350.2MB. Free memory was 303.3MB in the beginning and 301.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 375.61ms. Allocated memory is still 350.2MB. Free memory was 301.7MB in the beginning and 287.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 3828.07ms. Allocated memory was 350.2MB in the beginning and 480.2MB in the end (delta: 130.0MB). Free memory was 286.1MB in the beginning and 431.9MB in the end (delta: -145.9MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 86 PlacesBefore, 33 PlacesAfterwards, 77 TransitionsBefore, 23 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 3 ConcurrentYvCompositions, 1 ChoiceCompositions, 67 TotalNumberOfCompositions, 2389 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1205, independent: 1112, independent conditional: 0, independent unconditional: 1112, dependent: 93, dependent conditional: 0, dependent unconditional: 93, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 630, independent: 597, independent conditional: 0, independent unconditional: 597, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1205, independent: 515, independent conditional: 0, independent unconditional: 515, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 630, unknown conditional: 0, unknown unconditional: 630] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, 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, 116 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.7s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 94 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 94 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 370 IncrementalHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 13 mSDtfsCounter, 370 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=324occurred in iteration=7, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 352 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:29:31,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...