/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_30-traces-oplus-vs-meet_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:06:12,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:06:12,136 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:06:12,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:06:12,140 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:06:12,140 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:06:12,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:06:12,159 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:06:12,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:06:12,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:06:12,161 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:06:12,161 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:06:12,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:06:12,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:06:12,162 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:06:12,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:06:12,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:06:12,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:06:12,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:06:12,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:06:12,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:06:12,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:06:12,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:06:12,165 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:06:12,165 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:06:12,165 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:06:12,166 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:06:12,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:06:12,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:06:12,167 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:06:12,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:12,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:06:12,168 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:06:12,168 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:06:12,168 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:06:12,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:06:12,169 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:06:12,169 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:06:12,169 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:06:12,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:06:12,170 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:06:12,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:06:12,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:06:12,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:06:12,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:06:12,379 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:06:12,379 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:06:12,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_30-traces-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:13,563 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:06:13,773 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:06:13,774 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_30-traces-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:13,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d252e28c/63420e57d0e24b19a5bf30262cb79946/FLAG27ae10a41 [2023-08-03 22:06:13,802 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d252e28c/63420e57d0e24b19a5bf30262cb79946 [2023-08-03 22:06:13,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:06:13,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:06:13,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:13,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:06:13,808 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:06:13,809 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:13" (1/1) ... [2023-08-03 22:06:13,810 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f1f253c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:13, skipping insertion in model container [2023-08-03 22:06:13,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:13" (1/1) ... [2023-08-03 22:06:13,854 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:06:13,976 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_30-traces-oplus-vs-meet_true_bound2.i[1097,1110] [2023-08-03 22:06:14,125 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:14,133 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:06:14,146 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_30-traces-oplus-vs-meet_true_bound2.i[1097,1110] [2023-08-03 22:06:14,164 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:06:14,166 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:06:14,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:14,219 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:06:14,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14 WrapperNode [2023-08-03 22:06:14,219 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:14,220 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:14,221 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:06:14,221 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:06:14,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,239 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,256 INFO L138 Inliner]: procedures = 162, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-08-03 22:06:14,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:14,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:06:14,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:06:14,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:06:14,262 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,265 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,272 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,274 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,274 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,277 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:06:14,277 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:06:14,277 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:06:14,277 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:06:14,278 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (1/1) ... [2023-08-03 22:06:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:14,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:14,314 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 22:06:14,339 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 22:06:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:06:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:06:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:06:14,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:06:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:06:14,360 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 22:06:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 22:06:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:06:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:06:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:06:14,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:06:14,363 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 22:06:14,502 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:06:14,504 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:06:14,699 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:06:14,705 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:06:14,705 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:06:14,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:14 BoogieIcfgContainer [2023-08-03 22:06:14,707 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:06:14,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:06:14,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:06:14,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:06:14,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:06:13" (1/3) ... [2023-08-03 22:06:14,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ab5f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:14, skipping insertion in model container [2023-08-03 22:06:14,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:14" (2/3) ... [2023-08-03 22:06:14,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ab5f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:14, skipping insertion in model container [2023-08-03 22:06:14,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:14" (3/3) ... [2023-08-03 22:06:14,713 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_30-traces-oplus-vs-meet_true_bound2.i [2023-08-03 22:06:14,720 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:06:14,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:06:14,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 22:06:14,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:06:14,768 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 22:06:14,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 90 transitions, 188 flow [2023-08-03 22:06:14,839 INFO L124 PetriNetUnfolderBase]: 8/120 cut-off events. [2023-08-03 22:06:14,839 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:14,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 120 events. 8/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 178 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 64. Up to 4 conditions per place. [2023-08-03 22:06:14,845 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 90 transitions, 188 flow [2023-08-03 22:06:14,848 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 58 transitions, 121 flow [2023-08-03 22:06:14,850 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:14,859 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 60 places, 58 transitions, 121 flow [2023-08-03 22:06:14,861 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 60 places, 58 transitions, 121 flow [2023-08-03 22:06:14,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 58 transitions, 121 flow [2023-08-03 22:06:14,886 INFO L124 PetriNetUnfolderBase]: 1/62 cut-off events. [2023-08-03 22:06:14,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:14,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 62 events. 1/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 24 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-08-03 22:06:14,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 280 [2023-08-03 22:06:17,410 INFO L134 LiptonReduction]: Checked pairs total: 187 [2023-08-03 22:06:17,410 INFO L136 LiptonReduction]: Total number of compositions: 57 [2023-08-03 22:06:17,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:17,436 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;@535e77d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:17,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:17,442 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:17,442 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:06:17,442 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:17,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:17,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:17,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:17,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 9517780, now seen corresponding path program 1 times [2023-08-03 22:06:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:17,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542044601] [2023-08-03 22:06:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:17,559 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:06:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:17,600 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:06:17,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:06:17,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:17,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:06:17,604 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:17,606 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:06:17,607 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:06:17,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:06:17,621 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 22:06:17,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 106 transitions, 230 flow [2023-08-03 22:06:17,657 INFO L124 PetriNetUnfolderBase]: 14/190 cut-off events. [2023-08-03 22:06:17,657 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:17,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 190 events. 14/190 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 408 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 122. Up to 8 conditions per place. [2023-08-03 22:06:17,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 106 transitions, 230 flow [2023-08-03 22:06:17,661 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 73 transitions, 158 flow [2023-08-03 22:06:17,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:17,661 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 73 transitions, 158 flow [2023-08-03 22:06:17,661 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 73 transitions, 158 flow [2023-08-03 22:06:17,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 73 transitions, 158 flow [2023-08-03 22:06:17,675 INFO L124 PetriNetUnfolderBase]: 1/86 cut-off events. [2023-08-03 22:06:17,676 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:17,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 86 events. 1/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 59 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 63. Up to 3 conditions per place. [2023-08-03 22:06:17,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 980 [2023-08-03 22:06:19,685 INFO L134 LiptonReduction]: Checked pairs total: 3458 [2023-08-03 22:06:19,685 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-03 22:06:19,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:19,688 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;@535e77d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:19,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:19,691 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:19,691 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:06:19,692 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:19,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:19,692 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:06:19,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:19,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2103164480, now seen corresponding path program 1 times [2023-08-03 22:06:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013456862] [2023-08-03 22:06:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:19,858 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 22:06:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:19,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013456862] [2023-08-03 22:06:19,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013456862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:19,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576700229] [2023-08-03 22:06:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:19,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:06:19,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:19,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:06:19,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:06:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 166 [2023-08-03 22:06:19,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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 22:06:19,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:19,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 166 [2023-08-03 22:06:19,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:19,955 INFO L124 PetriNetUnfolderBase]: 35/112 cut-off events. [2023-08-03 22:06:19,956 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:06:19,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 112 events. 35/112 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 388 event pairs, 6 based on Foata normal form. 36/148 useless extension candidates. Maximal degree in co-relation 42. Up to 77 conditions per place. [2023-08-03 22:06:19,957 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-03 22:06:19,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 98 flow [2023-08-03 22:06:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 388 transitions. [2023-08-03 22:06:19,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843373493975904 [2023-08-03 22:06:19,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 388 transitions. [2023-08-03 22:06:19,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 388 transitions. [2023-08-03 22:06:19,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:19,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 388 transitions. [2023-08-03 22:06:19,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 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 22:06:19,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 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 22:06:19,980 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 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 22:06:19,982 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 56 flow. Second operand 4 states and 388 transitions. [2023-08-03 22:06:19,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 98 flow [2023-08-03 22:06:19,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 97 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:19,985 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-03 22:06:19,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, 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 22:06:19,989 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-03 22:06:19,989 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-03 22:06:19,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.25) internal successors, (373), 4 states have internal predecessors, (373), 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 22:06:19,989 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:19,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:06:19,990 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:19,991 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:06:19,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 106 transitions, 230 flow [2023-08-03 22:06:20,015 INFO L124 PetriNetUnfolderBase]: 14/190 cut-off events. [2023-08-03 22:06:20,015 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:20,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 190 events. 14/190 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 408 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 122. Up to 8 conditions per place. [2023-08-03 22:06:20,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 106 transitions, 230 flow [2023-08-03 22:06:20,017 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 84 transitions, 176 flow [2023-08-03 22:06:20,017 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:20,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 87 places, 84 transitions, 176 flow [2023-08-03 22:06:20,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 87 places, 84 transitions, 176 flow [2023-08-03 22:06:20,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 84 transitions, 176 flow [2023-08-03 22:06:20,030 INFO L124 PetriNetUnfolderBase]: 4/119 cut-off events. [2023-08-03 22:06:20,031 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:20,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 4/119 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 166 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2023-08-03 22:06:20,033 INFO L119 LiptonReduction]: Number of co-enabled transitions 1540 [2023-08-03 22:06:22,123 INFO L134 LiptonReduction]: Checked pairs total: 4608 [2023-08-03 22:06:22,123 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-03 22:06:22,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:06:22,126 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;@535e77d9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:22,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:06:22,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:22,127 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-03 22:06:22,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:22,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-03 22:06:22,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 558, now seen corresponding path program 1 times [2023-08-03 22:06:22,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042058401] [2023-08-03 22:06:22,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,135 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 22:06:22,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:22,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042058401] [2023-08-03 22:06:22,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042058401] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:22,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:22,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-03 22:06:22,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39956715] [2023-08-03 22:06:22,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:22,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-03 22:06:22,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:22,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-03 22:06:22,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-03 22:06:22,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 171 [2023-08-03 22:06:22,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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 22:06:22,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:22,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 171 [2023-08-03 22:06:22,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:22,218 INFO L124 PetriNetUnfolderBase]: 355/745 cut-off events. [2023-08-03 22:06:22,218 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 22:06:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381 conditions, 745 events. 355/745 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4001 event pairs, 355 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 213. Up to 613 conditions per place. [2023-08-03 22:06:22,225 INFO L140 encePairwiseOnDemand]: 170/171 looper letters, 18 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2023-08-03 22:06:22,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 94 flow [2023-08-03 22:06:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-03 22:06:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-03 22:06:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 211 transitions. [2023-08-03 22:06:22,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6169590643274854 [2023-08-03 22:06:22,229 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 211 transitions. [2023-08-03 22:06:22,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 211 transitions. [2023-08-03 22:06:22,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:22,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 211 transitions. [2023-08-03 22:06:22,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,234 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,235 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 60 flow. Second operand 2 states and 211 transitions. [2023-08-03 22:06:22,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 94 flow [2023-08-03 22:06:22,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 94 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:06:22,237 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 58 flow [2023-08-03 22:06:22,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2023-08-03 22:06:22,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-03 22:06:22,240 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 58 flow [2023-08-03 22:06:22,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 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 22:06:22,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:22,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:06:22,242 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 17147142, now seen corresponding path program 1 times [2023-08-03 22:06:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069391425] [2023-08-03 22:06:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,317 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 22:06:22,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:22,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069391425] [2023-08-03 22:06:22,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069391425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:22,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:22,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:06:22,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938389710] [2023-08-03 22:06:22,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:22,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:22,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:22,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:22,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 171 [2023-08-03 22:06:22,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 22:06:22,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:22,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 171 [2023-08-03 22:06:22,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:22,421 INFO L124 PetriNetUnfolderBase]: 355/727 cut-off events. [2023-08-03 22:06:22,421 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:22,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 727 events. 355/727 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3817 event pairs, 190 based on Foata normal form. 0/685 useless extension candidates. Maximal degree in co-relation 1356. Up to 602 conditions per place. [2023-08-03 22:06:22,424 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 23 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 22:06:22,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 122 flow [2023-08-03 22:06:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-03 22:06:22,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886939571150097 [2023-08-03 22:06:22,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-03 22:06:22,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-03 22:06:22,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:22,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-03 22:06:22,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 22:06:22,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,431 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 58 flow. Second operand 3 states and 302 transitions. [2023-08-03 22:06:22,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 122 flow [2023-08-03 22:06:22,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:06:22,432 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 70 flow [2023-08-03 22:06:22,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=34, PETRI_TRANSITIONS=26} [2023-08-03 22:06:22,434 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-03 22:06:22,435 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 70 flow [2023-08-03 22:06:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 22:06:22,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:22,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 22:06:22,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1462467524, now seen corresponding path program 1 times [2023-08-03 22:06:22,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454452280] [2023-08-03 22:06:22,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,513 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 22:06:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454452280] [2023-08-03 22:06:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454452280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983786655] [2023-08-03 22:06:22,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:22,525 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 22:06:22,549 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 22:06:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:06:22,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:22,640 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 22:06:22,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:22,656 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 22:06:22,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983786655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:22,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:22,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:06:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875955890] [2023-08-03 22:06:22,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:22,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:22,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:22,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:22,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-08-03 22:06:22,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 70 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 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 22:06:22,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:22,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-08-03 22:06:22,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:22,768 INFO L124 PetriNetUnfolderBase]: 340/622 cut-off events. [2023-08-03 22:06:22,768 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-03 22:06:22,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1310 conditions, 622 events. 340/622 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3032 event pairs, 54 based on Foata normal form. 6/622 useless extension candidates. Maximal degree in co-relation 1303. Up to 385 conditions per place. [2023-08-03 22:06:22,774 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 32 selfloop transitions, 3 changer transitions 1/43 dead transitions. [2023-08-03 22:06:22,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 176 flow [2023-08-03 22:06:22,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:22,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 401 transitions. [2023-08-03 22:06:22,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862573099415205 [2023-08-03 22:06:22,776 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 401 transitions. [2023-08-03 22:06:22,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 401 transitions. [2023-08-03 22:06:22,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:22,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 401 transitions. [2023-08-03 22:06:22,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.25) internal successors, (401), 4 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,779 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,779 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 70 flow. Second operand 4 states and 401 transitions. [2023-08-03 22:06:22,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 176 flow [2023-08-03 22:06:22,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:22,783 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 82 flow [2023-08-03 22:06:22,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=38, PETRI_TRANSITIONS=26} [2023-08-03 22:06:22,787 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2023-08-03 22:06:22,787 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 82 flow [2023-08-03 22:06:22,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 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 22:06:22,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,788 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:22,800 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 22:06:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:22,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash -425681887, now seen corresponding path program 1 times [2023-08-03 22:06:22,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13519853] [2023-08-03 22:06:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,081 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 22:06:23,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:23,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13519853] [2023-08-03 22:06:23,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13519853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:23,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:23,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:06:23,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704746495] [2023-08-03 22:06:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:23,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:23,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:23,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-08-03 22:06:23,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 22:06:23,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:23,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-08-03 22:06:23,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:23,178 INFO L124 PetriNetUnfolderBase]: 331/705 cut-off events. [2023-08-03 22:06:23,179 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2023-08-03 22:06:23,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 705 events. 331/705 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3869 event pairs, 194 based on Foata normal form. 31/719 useless extension candidates. Maximal degree in co-relation 1578. Up to 371 conditions per place. [2023-08-03 22:06:23,182 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 32 selfloop transitions, 5 changer transitions 0/43 dead transitions. [2023-08-03 22:06:23,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 212 flow [2023-08-03 22:06:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-03 22:06:23,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2023-08-03 22:06:23,183 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-03 22:06:23,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-03 22:06:23,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:23,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-03 22:06:23,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 22:06:23,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,186 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,186 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 82 flow. Second operand 3 states and 309 transitions. [2023-08-03 22:06:23,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 212 flow [2023-08-03 22:06:23,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 200 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:23,188 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 113 flow [2023-08-03 22:06:23,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=35, 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=39, PETRI_TRANSITIONS=30} [2023-08-03 22:06:23,189 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-08-03 22:06:23,189 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 113 flow [2023-08-03 22:06:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 22:06:23,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:23,190 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:06:23,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:23,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:23,190 INFO L85 PathProgramCache]: Analyzing trace with hash 326673570, now seen corresponding path program 1 times [2023-08-03 22:06:23,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:23,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144345164] [2023-08-03 22:06:23,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:23,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,273 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 22:06:23,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:23,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144345164] [2023-08-03 22:06:23,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144345164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:23,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:23,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:23,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228899016] [2023-08-03 22:06:23,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:23,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:23,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:23,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:23,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 171 [2023-08-03 22:06:23,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:23,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 171 [2023-08-03 22:06:23,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:23,413 INFO L124 PetriNetUnfolderBase]: 241/556 cut-off events. [2023-08-03 22:06:23,413 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2023-08-03 22:06:23,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1449 conditions, 556 events. 241/556 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2759 event pairs, 111 based on Foata normal form. 127/683 useless extension candidates. Maximal degree in co-relation 1441. Up to 287 conditions per place. [2023-08-03 22:06:23,416 INFO L140 encePairwiseOnDemand]: 160/171 looper letters, 29 selfloop transitions, 11 changer transitions 5/48 dead transitions. [2023-08-03 22:06:23,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 268 flow [2023-08-03 22:06:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-03 22:06:23,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653021442495126 [2023-08-03 22:06:23,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-03 22:06:23,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-03 22:06:23,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:23,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-03 22:06:23,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 22:06:23,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,421 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 113 flow. Second operand 3 states and 290 transitions. [2023-08-03 22:06:23,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 268 flow [2023-08-03 22:06:23,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 48 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:06:23,425 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 148 flow [2023-08-03 22:06:23,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=37, 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=148, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-03 22:06:23,427 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-08-03 22:06:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 148 flow [2023-08-03 22:06:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:23,427 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:06:23,428 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:23,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1044674771, now seen corresponding path program 1 times [2023-08-03 22:06:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141724197] [2023-08-03 22:06:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,598 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 22:06:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141724197] [2023-08-03 22:06:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141724197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938366905] [2023-08-03 22:06:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:23,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 171 [2023-08-03 22:06:23,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:23,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 171 [2023-08-03 22:06:23,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:23,719 INFO L124 PetriNetUnfolderBase]: 57/193 cut-off events. [2023-08-03 22:06:23,719 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-03 22:06:23,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 193 events. 57/193 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 763 event pairs, 9 based on Foata normal form. 60/253 useless extension candidates. Maximal degree in co-relation 625. Up to 143 conditions per place. [2023-08-03 22:06:23,720 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-03 22:06:23,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 212 flow [2023-08-03 22:06:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:23,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2023-08-03 22:06:23,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5263157894736842 [2023-08-03 22:06:23,722 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 360 transitions. [2023-08-03 22:06:23,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 360 transitions. [2023-08-03 22:06:23,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:23,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 360 transitions. [2023-08-03 22:06:23,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 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 22:06:23,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,726 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,726 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 148 flow. Second operand 4 states and 360 transitions. [2023-08-03 22:06:23,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 212 flow [2023-08-03 22:06:23,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:23,728 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-03 22:06:23,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, 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=39, PETRI_TRANSITIONS=0} [2023-08-03 22:06:23,729 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2023-08-03 22:06:23,729 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-03 22:06:23,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 22:06:23,729 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 22:06:23,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 22:06:23,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-03 22:06:23,731 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (2/2) [2023-08-03 22:06:23,731 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:06:23,731 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:06:23,735 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:06:23 BasicIcfg [2023-08-03 22:06:23,735 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:06:23,735 INFO L158 Benchmark]: Toolchain (without parser) took 9930.61ms. Allocated memory was 465.6MB in the beginning and 559.9MB in the end (delta: 94.4MB). Free memory was 420.0MB in the beginning and 437.7MB in the end (delta: -17.7MB). Peak memory consumption was 78.5MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,735 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 307.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:06:23,736 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.96ms. Allocated memory is still 465.6MB. Free memory was 420.0MB in the beginning and 400.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,736 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.08ms. Allocated memory is still 465.6MB. Free memory was 400.7MB in the beginning and 398.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,736 INFO L158 Benchmark]: Boogie Preprocessor took 19.78ms. Allocated memory is still 465.6MB. Free memory was 398.6MB in the beginning and 397.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,736 INFO L158 Benchmark]: RCFGBuilder took 429.36ms. Allocated memory is still 465.6MB. Free memory was 397.0MB in the beginning and 383.2MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,737 INFO L158 Benchmark]: TraceAbstraction took 9026.42ms. Allocated memory was 465.6MB in the beginning and 559.9MB in the end (delta: 94.4MB). Free memory was 382.3MB in the beginning and 437.7MB in the end (delta: -55.5MB). Peak memory consumption was 40.8MB. Max. memory is 16.0GB. [2023-08-03 22:06:23,739 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 307.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 413.96ms. Allocated memory is still 465.6MB. Free memory was 420.0MB in the beginning and 400.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.08ms. Allocated memory is still 465.6MB. Free memory was 400.7MB in the beginning and 398.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.78ms. Allocated memory is still 465.6MB. Free memory was 398.6MB in the beginning and 397.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 429.36ms. Allocated memory is still 465.6MB. Free memory was 397.0MB in the beginning and 383.2MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 9026.42ms. Allocated memory was 465.6MB in the beginning and 559.9MB in the end (delta: 94.4MB). Free memory was 382.3MB in the beginning and 437.7MB in the end (delta: -55.5MB). Peak memory consumption was 40.8MB. 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: 2.5s, 60 PlacesBefore, 8 PlacesAfterwards, 58 TransitionsBefore, 5 TransitionsAfterwards, 280 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 57 TotalNumberOfCompositions, 187 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 187, independent: 187, independent conditional: 0, independent unconditional: 187, 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: 187, independent: 45, independent conditional: 0, independent unconditional: 45, 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): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, 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: 2.0s, 77 PlacesBefore, 27 PlacesAfterwards, 73 TransitionsBefore, 22 TransitionsAfterwards, 980 CoEnabledTransitionPairs, 7 FixpointIterations, 35 TrivialSequentialCompositions, 16 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 60 TotalNumberOfCompositions, 3458 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1369, independent: 1155, independent conditional: 0, independent unconditional: 1155, dependent: 214, dependent conditional: 0, dependent unconditional: 214, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 465, independent: 434, independent conditional: 0, independent unconditional: 434, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1369, independent: 721, independent conditional: 0, independent unconditional: 721, dependent: 183, dependent conditional: 0, dependent unconditional: 183, unknown: 465, unknown conditional: 0, unknown unconditional: 465] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, 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: 2.1s, 87 PlacesBefore, 31 PlacesAfterwards, 84 TransitionsBefore, 26 TransitionsAfterwards, 1540 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 65 TotalNumberOfCompositions, 4608 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1505, independent: 1294, independent conditional: 0, independent unconditional: 1294, dependent: 211, dependent conditional: 0, dependent unconditional: 211, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 717, independent: 678, independent conditional: 0, independent unconditional: 678, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1505, independent: 616, independent conditional: 0, independent unconditional: 616, dependent: 172, dependent conditional: 0, dependent unconditional: 172, unknown: 717, unknown conditional: 0, unknown unconditional: 717] , Statistics on independence cache: Total cache size (in pairs): 87, Positive cache size: 67, Positive conditional cache size: 0, Positive unconditional cache size: 67, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, 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 - 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, 101 locations, 3 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: 2.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, 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, 116 locations, 3 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: 2.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 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, 116 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.7s, OverallIterations: 6, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 228 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 118 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396 IncrementalHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 24 mSDtfsCounter, 396 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=148occurred in iteration=5, InterpolantAutomatonStates: 19, 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, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 SizeOfPredicates, 0 NumberOfNonLiveVariables, 116 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 22:06:23,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...