/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:07:15,482 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:07:15,529 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:07:15,537 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:07:15,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:07:15,538 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:07:15,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:07:15,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:07:15,576 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:07:15,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:07:15,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:07:15,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:07:15,580 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:07:15,580 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:07:15,581 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:07:15,581 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:07:15,581 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:07:15,581 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:07:15,582 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:07:15,582 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:07:15,582 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:07:15,584 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:07:15,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:07:15,584 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:07:15,585 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:07:15,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:07:15,586 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:07:15,586 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:07:15,586 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:07:15,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:07:15,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:07:15,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:07:15,588 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:07:15,589 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:07:15,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:07:15,589 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:07:15,589 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:07:15,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:07:15,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:07:15,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:07:15,816 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:07:15,818 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:07:15,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i [2023-08-03 22:07:17,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:07:17,221 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:07:17,222 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i [2023-08-03 22:07:17,233 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc3909bd/a9e0b107e0114d46a2bbf812e6545a55/FLAG3044319ee [2023-08-03 22:07:17,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc3909bd/a9e0b107e0114d46a2bbf812e6545a55 [2023-08-03 22:07:17,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:07:17,247 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:07:17,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:07:17,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:07:17,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:07:17,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b279fbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17, skipping insertion in model container [2023-08-03 22:07:17,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,295 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:07:17,427 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i[1095,1108] [2023-08-03 22:07:17,573 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:07:17,585 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:07:17,599 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i[1095,1108] [2023-08-03 22:07:17,618 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:07:17,620 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:07:17,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:07:17,678 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:07:17,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17 WrapperNode [2023-08-03 22:07:17,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:07:17,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:07:17,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:07:17,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:07:17,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,725 INFO L138 Inliner]: procedures = 162, calls = 29, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2023-08-03 22:07:17,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:07:17,726 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:07:17,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:07:17,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:07:17,734 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,738 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,757 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,758 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,759 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,761 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:07:17,762 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:07:17,762 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:07:17,762 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:07:17,762 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (1/1) ... [2023-08-03 22:07:17,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:07:17,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:07:17,788 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) [2023-08-03 22:07:17,802 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 [2023-08-03 22:07:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:07:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:07:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:07:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:07:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 22:07:17,824 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 22:07:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:07:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:07:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:07:17,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:07:17,825 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:07:17,917 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:07:17,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:07:18,053 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:07:18,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:07:18,063 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-03 22:07:18,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:07:18 BoogieIcfgContainer [2023-08-03 22:07:18,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:07:18,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:07:18,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:07:18,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:07:18,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:07:17" (1/3) ... [2023-08-03 22:07:18,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7889a5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:07:18, skipping insertion in model container [2023-08-03 22:07:18,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:07:17" (2/3) ... [2023-08-03 22:07:18,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7889a5ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:07:18, skipping insertion in model container [2023-08-03 22:07:18,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:07:18" (3/3) ... [2023-08-03 22:07:18,072 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_38-traces-ex-4-switch_true_bound2.i [2023-08-03 22:07:18,079 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:07:18,087 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:07:18,087 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:07:18,088 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:07:18,133 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:07:18,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 149 flow [2023-08-03 22:07:18,197 INFO L124 PetriNetUnfolderBase]: 4/97 cut-off events. [2023-08-03 22:07:18,197 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 97 events. 4/97 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 51. Up to 4 conditions per place. [2023-08-03 22:07:18,201 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 72 transitions, 149 flow [2023-08-03 22:07:18,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 51 transitions, 107 flow [2023-08-03 22:07:18,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:18,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 51 transitions, 107 flow [2023-08-03 22:07:18,216 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 51 transitions, 107 flow [2023-08-03 22:07:18,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 51 transitions, 107 flow [2023-08-03 22:07:18,230 INFO L124 PetriNetUnfolderBase]: 0/55 cut-off events. [2023-08-03 22:07:18,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:18,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 55 events. 0/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-03 22:07:18,231 INFO L119 LiptonReduction]: Number of co-enabled transitions 280 [2023-08-03 22:07:20,568 INFO L134 LiptonReduction]: Checked pairs total: 221 [2023-08-03 22:07:20,568 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-03 22:07:20,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:07:20,584 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=true, 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;@571d6b8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:07:20,585 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:07:20,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:07:20,587 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:07:20,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:20,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:20,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:07:20,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:07:20,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:20,591 INFO L85 PathProgramCache]: Analyzing trace with hash 7710337, now seen corresponding path program 1 times [2023-08-03 22:07:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527193882] [2023-08-03 22:07:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:07:20,684 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:07:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:07:20,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:07:20,718 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:07:20,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:07:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:07:20,720 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:07:20,723 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:07:20,723 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:07:20,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:07:20,736 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:07:20,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 186 flow [2023-08-03 22:07:20,762 INFO L124 PetriNetUnfolderBase]: 6/142 cut-off events. [2023-08-03 22:07:20,762 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:20,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 6/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 285 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-03 22:07:20,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 186 flow [2023-08-03 22:07:20,764 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 66 transitions, 144 flow [2023-08-03 22:07:20,764 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:20,764 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 66 transitions, 144 flow [2023-08-03 22:07:20,765 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 66 transitions, 144 flow [2023-08-03 22:07:20,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 66 transitions, 144 flow [2023-08-03 22:07:20,776 INFO L124 PetriNetUnfolderBase]: 0/79 cut-off events. [2023-08-03 22:07:20,776 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:20,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 0/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-03 22:07:20,777 INFO L119 LiptonReduction]: Number of co-enabled transitions 980 [2023-08-03 22:07:22,566 INFO L134 LiptonReduction]: Checked pairs total: 3287 [2023-08-03 22:07:22,566 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-03 22:07:22,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:07:22,569 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=true, 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;@571d6b8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:07:22,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:07:22,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:07:22,573 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:07:22,573 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:22,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:22,574 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:07:22,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:07:22,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1937298865, now seen corresponding path program 1 times [2023-08-03 22:07:22,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328211614] [2023-08-03 22:07:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:22,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:22,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328211614] [2023-08-03 22:07:22,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328211614] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:22,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:07:22,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:07:22,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163730385] [2023-08-03 22:07:22,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:07:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:22,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:07:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:07:22,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 134 [2023-08-03 22:07:22,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 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) [2023-08-03 22:07:22,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:22,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 134 [2023-08-03 22:07:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:22,815 INFO L124 PetriNetUnfolderBase]: 28/95 cut-off events. [2023-08-03 22:07:22,815 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-03 22:07:22,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 95 events. 28/95 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 311 event pairs, 12 based on Foata normal form. 30/122 useless extension candidates. Maximal degree in co-relation 38. Up to 63 conditions per place. [2023-08-03 22:07:22,816 INFO L140 encePairwiseOnDemand]: 132/134 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-03 22:07:22,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 92 flow [2023-08-03 22:07:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:07:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:07:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 330 transitions. [2023-08-03 22:07:22,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156716417910447 [2023-08-03 22:07:22,832 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 330 transitions. [2023-08-03 22:07:22,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 330 transitions. [2023-08-03 22:07:22,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:22,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 330 transitions. [2023-08-03 22:07:22,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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) [2023-08-03 22:07:22,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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) [2023-08-03 22:07:22,843 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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) [2023-08-03 22:07:22,844 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 4 states and 330 transitions. [2023-08-03 22:07:22,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 92 flow [2023-08-03 22:07:22,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:07:22,847 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-03 22:07:22,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=134, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-03 22:07:22,851 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-03 22:07:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-03 22:07:22,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.25) internal successors, (317), 4 states have internal predecessors, (317), 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) [2023-08-03 22:07:22,852 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:07:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:07:22,853 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:07:22,853 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:07:22,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 186 flow [2023-08-03 22:07:22,873 INFO L124 PetriNetUnfolderBase]: 6/142 cut-off events. [2023-08-03 22:07:22,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:07:22,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 6/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 285 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2023-08-03 22:07:22,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 186 flow [2023-08-03 22:07:22,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 76 transitions, 160 flow [2023-08-03 22:07:22,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:07:22,875 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 76 transitions, 160 flow [2023-08-03 22:07:22,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 76 transitions, 160 flow [2023-08-03 22:07:22,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 76 transitions, 160 flow [2023-08-03 22:07:22,887 INFO L124 PetriNetUnfolderBase]: 3/111 cut-off events. [2023-08-03 22:07:22,887 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:07:22,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 111 events. 3/111 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 165 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 78. Up to 6 conditions per place. [2023-08-03 22:07:22,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 1540 [2023-08-03 22:07:24,606 INFO L134 LiptonReduction]: Checked pairs total: 4596 [2023-08-03 22:07:24,606 INFO L136 LiptonReduction]: Total number of compositions: 52 [2023-08-03 22:07:24,608 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:07:24,609 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=true, 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;@571d6b8d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:07:24,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:07:24,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:07:24,611 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-03 22:07:24,611 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:07:24,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:24,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:07:24,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:07:24,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:24,612 INFO L85 PathProgramCache]: Analyzing trace with hash 13923817, now seen corresponding path program 1 times [2023-08-03 22:07:24,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:24,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182052797] [2023-08-03 22:07:24,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:24,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182052797] [2023-08-03 22:07:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182052797] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:24,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:07:24,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:07:24,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91215974] [2023-08-03 22:07:24,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:24,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:07:24,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:24,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:07:24,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:07:24,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 139 [2023-08-03 22:07:24,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-08-03 22:07:24,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:24,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 139 [2023-08-03 22:07:24,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:24,808 INFO L124 PetriNetUnfolderBase]: 289/602 cut-off events. [2023-08-03 22:07:24,808 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 22:07:24,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 602 events. 289/602 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3169 event pairs, 205 based on Foata normal form. 0/562 useless extension candidates. Maximal degree in co-relation 214. Up to 495 conditions per place. [2023-08-03 22:07:24,815 INFO L140 encePairwiseOnDemand]: 136/139 looper letters, 21 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-03 22:07:24,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 116 flow [2023-08-03 22:07:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:07:24,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:07:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-03 22:07:24,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6187050359712231 [2023-08-03 22:07:24,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-03 22:07:24,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-03 22:07:24,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:24,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-03 22:07:24,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-08-03 22:07:24,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:24,829 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:24,829 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 58 flow. Second operand 3 states and 258 transitions. [2023-08-03 22:07:24,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 116 flow [2023-08-03 22:07:24,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 116 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:07:24,831 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 70 flow [2023-08-03 22:07:24,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-03 22:07:24,834 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-03 22:07:24,834 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 70 flow [2023-08-03 22:07:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-08-03 22:07:24,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:24,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:07:24,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:07:24,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:07:24,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash 55366238, now seen corresponding path program 1 times [2023-08-03 22:07:24,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:24,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382304641] [2023-08-03 22:07:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:24,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:24,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:24,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382304641] [2023-08-03 22:07:24,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382304641] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:07:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204701568] [2023-08-03 22:07:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:24,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:07:24,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:07:24,929 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:07:24,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:07:24,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:24,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:07:24,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:07:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:25,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:07:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:07:25,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204701568] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:07:25,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:07:25,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:07:25,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117360912] [2023-08-03 22:07:25,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:07:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:07:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:07:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:07:25,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-08-03 22:07:25,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 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) [2023-08-03 22:07:25,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:25,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-08-03 22:07:25,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:25,169 INFO L124 PetriNetUnfolderBase]: 277/515 cut-off events. [2023-08-03 22:07:25,170 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-03 22:07:25,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 515 events. 277/515 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2524 event pairs, 51 based on Foata normal form. 5/517 useless extension candidates. Maximal degree in co-relation 594. Up to 317 conditions per place. [2023-08-03 22:07:25,172 INFO L140 encePairwiseOnDemand]: 135/139 looper letters, 29 selfloop transitions, 3 changer transitions 1/41 dead transitions. [2023-08-03 22:07:25,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 166 flow [2023-08-03 22:07:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:07:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:07:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2023-08-03 22:07:25,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151079136690647 [2023-08-03 22:07:25,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 342 transitions. [2023-08-03 22:07:25,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 342 transitions. [2023-08-03 22:07:25,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:25,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 342 transitions. [2023-08-03 22:07:25,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 85.5) internal successors, (342), 4 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:25,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-08-03 22:07:25,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-08-03 22:07:25,177 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 70 flow. Second operand 4 states and 342 transitions. [2023-08-03 22:07:25,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 166 flow [2023-08-03 22:07:25,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:07:25,179 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 82 flow [2023-08-03 22:07:25,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-03 22:07:25,180 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-08-03 22:07:25,180 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 82 flow [2023-08-03 22:07:25,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.2) internal successors, (396), 5 states have internal predecessors, (396), 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) [2023-08-03 22:07:25,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:25,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:07:25,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:07:25,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:07:25,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:07:25,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:25,387 INFO L85 PathProgramCache]: Analyzing trace with hash 576505074, now seen corresponding path program 1 times [2023-08-03 22:07:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:25,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79796650] [2023-08-03 22:07:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:07:25,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:25,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79796650] [2023-08-03 22:07:25,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79796650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:25,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:07:25,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:07:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237345728] [2023-08-03 22:07:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:25,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:07:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:25,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:07:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:07:25,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 139 [2023-08-03 22:07:25,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-08-03 22:07:25,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:25,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 139 [2023-08-03 22:07:25,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:25,563 INFO L124 PetriNetUnfolderBase]: 268/611 cut-off events. [2023-08-03 22:07:25,563 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2023-08-03 22:07:25,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 611 events. 268/611 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3339 event pairs, 177 based on Foata normal form. 29/616 useless extension candidates. Maximal degree in co-relation 546. Up to 345 conditions per place. [2023-08-03 22:07:25,570 INFO L140 encePairwiseOnDemand]: 133/139 looper letters, 30 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-08-03 22:07:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 206 flow [2023-08-03 22:07:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:07:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:07:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-03 22:07:25,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6354916067146283 [2023-08-03 22:07:25,572 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-03 22:07:25,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-03 22:07:25,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:25,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-03 22:07:25,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:25,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:25,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:25,574 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 82 flow. Second operand 3 states and 265 transitions. [2023-08-03 22:07:25,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 206 flow [2023-08-03 22:07:25,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 194 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:07:25,578 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 113 flow [2023-08-03 22:07:25,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2023-08-03 22:07:25,580 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-03 22:07:25,580 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 113 flow [2023-08-03 22:07:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2023-08-03 22:07:25,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:25,581 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:07:25,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:07:25,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:07:25,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2088979353, now seen corresponding path program 1 times [2023-08-03 22:07:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158941066] [2023-08-03 22:07:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:07:25,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:25,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158941066] [2023-08-03 22:07:25,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158941066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:25,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:07:25,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:07:25,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044262624] [2023-08-03 22:07:25,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:25,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:07:25,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:25,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:07:25,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:07:25,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 139 [2023-08-03 22:07:25,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:25,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:25,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 139 [2023-08-03 22:07:25,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:25,798 INFO L124 PetriNetUnfolderBase]: 245/560 cut-off events. [2023-08-03 22:07:25,798 INFO L125 PetriNetUnfolderBase]: For 576/576 co-relation queries the response was YES. [2023-08-03 22:07:25,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1465 conditions, 560 events. 245/560 cut-off events. For 576/576 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2777 event pairs, 111 based on Foata normal form. 127/686 useless extension candidates. Maximal degree in co-relation 886. Up to 294 conditions per place. [2023-08-03 22:07:25,801 INFO L140 encePairwiseOnDemand]: 128/139 looper letters, 27 selfloop transitions, 11 changer transitions 8/49 dead transitions. [2023-08-03 22:07:25,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 274 flow [2023-08-03 22:07:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:07:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:07:25,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2023-08-03 22:07:25,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947242206235012 [2023-08-03 22:07:25,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 248 transitions. [2023-08-03 22:07:25,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 248 transitions. [2023-08-03 22:07:25,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:25,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 248 transitions. [2023-08-03 22:07:25,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:25,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:25,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 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) [2023-08-03 22:07:25,805 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 113 flow. Second operand 3 states and 248 transitions. [2023-08-03 22:07:25,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 274 flow [2023-08-03 22:07:25,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:07:25,807 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 144 flow [2023-08-03 22:07:25,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-08-03 22:07:25,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2023-08-03 22:07:25,808 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 144 flow [2023-08-03 22:07:25,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:25,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:07:25,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:07:25,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:07:25,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:07:25,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:07:25,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1883325875, now seen corresponding path program 1 times [2023-08-03 22:07:25,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:07:25,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918644439] [2023-08-03 22:07:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:07:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:07:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:07:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:07:25,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:07:25,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918644439] [2023-08-03 22:07:25,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918644439] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:07:25,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:07:25,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:07:25,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486748620] [2023-08-03 22:07:25,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:07:25,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:07:25,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:07:25,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:07:25,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:07:26,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 139 [2023-08-03 22:07:26,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:26,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:07:26,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 139 [2023-08-03 22:07:26,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:26,081 INFO L124 PetriNetUnfolderBase]: 52/188 cut-off events. [2023-08-03 22:07:26,082 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2023-08-03 22:07:26,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 188 events. 52/188 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 765 event pairs, 9 based on Foata normal form. 57/245 useless extension candidates. Maximal degree in co-relation 370. Up to 130 conditions per place. [2023-08-03 22:07:26,082 INFO L140 encePairwiseOnDemand]: 133/139 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-03 22:07:26,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 210 flow [2023-08-03 22:07:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:07:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:07:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-03 22:07:26,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5449640287769785 [2023-08-03 22:07:26,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-03 22:07:26,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-03 22:07:26,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:26,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-03 22:07:26,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 states have internal predecessors, (303), 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) [2023-08-03 22:07:26,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-08-03 22:07:26,087 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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) [2023-08-03 22:07:26,087 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 144 flow. Second operand 4 states and 303 transitions. [2023-08-03 22:07:26,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 210 flow [2023-08-03 22:07:26,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 22:07:26,089 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-03 22:07:26,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-03 22:07:26,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-03 22:07:26,091 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-03 22:07:26,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:07:26,092 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 22:07:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:07:26,092 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-03 22:07:26,093 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (2/2) [2023-08-03 22:07:26,093 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:07:26,093 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:07:26,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:07:26 BasicIcfg [2023-08-03 22:07:26,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:07:26,103 INFO L158 Benchmark]: Toolchain (without parser) took 8856.06ms. Allocated memory was 482.3MB in the beginning and 578.8MB in the end (delta: 96.5MB). Free memory was 430.3MB in the beginning and 532.7MB in the end (delta: -102.4MB). Peak memory consumption was 324.6MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,103 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory was 301.3MB in the beginning and 301.3MB in the end (delta: 57.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:07:26,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 431.39ms. Allocated memory is still 482.3MB. Free memory was 430.3MB in the beginning and 411.0MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.12ms. Allocated memory is still 482.3MB. Free memory was 411.0MB in the beginning and 409.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,104 INFO L158 Benchmark]: Boogie Preprocessor took 34.70ms. Allocated memory is still 482.3MB. Free memory was 409.1MB in the beginning and 407.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,104 INFO L158 Benchmark]: RCFGBuilder took 303.62ms. Allocated memory is still 482.3MB. Free memory was 407.7MB in the beginning and 444.8MB in the end (delta: -37.1MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,104 INFO L158 Benchmark]: TraceAbstraction took 8035.18ms. Allocated memory was 482.3MB in the beginning and 578.8MB in the end (delta: 96.5MB). Free memory was 444.1MB in the beginning and 532.7MB in the end (delta: -88.6MB). Peak memory consumption was 335.7MB. Max. memory is 16.0GB. [2023-08-03 22:07:26,106 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory was 301.3MB in the beginning and 301.3MB in the end (delta: 57.7kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 431.39ms. Allocated memory is still 482.3MB. Free memory was 430.3MB in the beginning and 411.0MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.12ms. Allocated memory is still 482.3MB. Free memory was 411.0MB in the beginning and 409.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.70ms. Allocated memory is still 482.3MB. Free memory was 409.1MB in the beginning and 407.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 303.62ms. Allocated memory is still 482.3MB. Free memory was 407.7MB in the beginning and 444.8MB in the end (delta: -37.1MB). Peak memory consumption was 18.3MB. Max. memory is 16.0GB. * TraceAbstraction took 8035.18ms. Allocated memory was 482.3MB in the beginning and 578.8MB in the end (delta: 96.5MB). Free memory was 444.1MB in the beginning and 532.7MB in the end (delta: -88.6MB). Peak memory consumption was 335.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 54 PlacesBefore, 8 PlacesAfterwards, 51 TransitionsBefore, 5 TransitionsAfterwards, 280 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 49 TotalNumberOfCompositions, 221 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 221, independent: 221, independent conditional: 0, independent unconditional: 221, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 142, independent: 142, independent conditional: 0, independent unconditional: 142, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 221, independent: 79, independent conditional: 0, independent unconditional: 79, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 142, unknown conditional: 0, unknown unconditional: 142] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 71 PlacesBefore, 27 PlacesAfterwards, 66 TransitionsBefore, 22 TransitionsAfterwards, 980 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 47 TotalNumberOfCompositions, 3287 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1525, independent: 1343, independent conditional: 0, independent unconditional: 1343, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 477, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1525, independent: 897, independent conditional: 0, independent unconditional: 897, dependent: 151, dependent conditional: 0, dependent unconditional: 151, unknown: 477, unknown conditional: 0, unknown unconditional: 477] , Statistics on independence cache: Total cache size (in pairs): 68, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 14, Negative conditional cache size: 0, Negative unconditional cache size: 14, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 80 PlacesBefore, 30 PlacesAfterwards, 76 TransitionsBefore, 25 TransitionsAfterwards, 1540 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 52 TotalNumberOfCompositions, 4596 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1530, independent: 1325, independent conditional: 0, independent unconditional: 1325, dependent: 205, dependent conditional: 0, dependent unconditional: 205, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 699, independent: 665, independent conditional: 0, independent unconditional: 665, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1530, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 699, unknown conditional: 0, unknown unconditional: 699] , Statistics on independence cache: Total cache size (in pairs): 63, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 86 locations, 2 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: 2.6s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 101 locations, 2 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: 2.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 38 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=0, InterpolantAutomatonStates: 4, 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, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 5/5 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 101 locations, 2 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: 3.2s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 208 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 113 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 375 IncrementalHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 9 mSDtfsCounter, 375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=4, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 113 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 18/21 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 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:07:26,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...