/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_34-traces-minepp-L-needs-to-be-um_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:33:04,012 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:33:04,095 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:33:04,100 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:33:04,100 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:33:04,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:33:04,101 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:33:04,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:33:04,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:33:04,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:33:04,135 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:33:04,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:33:04,137 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:33:04,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:33:04,138 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:33:04,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:33:04,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:33:04,139 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:33:04,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:33:04,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:33:04,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:33:04,140 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:33:04,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:33:04,141 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:33:04,142 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:33:04,142 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:33:04,143 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:33:04,143 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:33:04,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:33:04,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:33:04,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:33:04,145 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:33:04,145 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:33:04,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:33:04,145 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:33:04,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:33:04,145 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:33:04,146 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:33:04,146 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:33:04,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:33:04,146 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:33:04,146 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:33:04,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:33:04,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:33:04,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:33:04,410 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:33:04,410 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:33:04,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_34-traces-minepp-L-needs-to-be-um_true_bound2.i [2023-08-04 04:33:05,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:33:05,778 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:33:05,778 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_34-traces-minepp-L-needs-to-be-um_true_bound2.i [2023-08-04 04:33:05,792 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef933bde5/64868f791dc644d7950011bb2729bdb1/FLAG0c4a4a5fa [2023-08-04 04:33:05,804 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef933bde5/64868f791dc644d7950011bb2729bdb1 [2023-08-04 04:33:05,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:33:05,807 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:33:05,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:33:05,808 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:33:05,812 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:33:05,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:33:05" (1/1) ... [2023-08-04 04:33:05,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@370c79a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:05, skipping insertion in model container [2023-08-04 04:33:05,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:33:05" (1/1) ... [2023-08-04 04:33:05,860 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:33:05,992 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_34-traces-minepp-L-needs-to-be-um_true_bound2.i[1107,1120] [2023-08-04 04:33:06,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:33:06,105 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:33:06,115 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_34-traces-minepp-L-needs-to-be-um_true_bound2.i[1107,1120] [2023-08-04 04:33:06,130 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-04 04:33:06,131 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-04 04:33:06,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:33:06,198 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:33:06,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06 WrapperNode [2023-08-04 04:33:06,199 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:33:06,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:33:06,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:33:06,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:33:06,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,265 INFO L138 Inliner]: procedures = 163, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-08-04 04:33:06,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:33:06,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:33:06,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:33:06,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:33:06,273 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,274 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,277 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,291 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,293 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,294 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:33:06,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:33:06,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:33:06,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:33:06,298 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (1/1) ... [2023-08-04 04:33:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:33:06,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:33:06,336 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) [2023-08-04 04:33:06,342 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 [2023-08-04 04:33:06,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 04:33:06,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:33:06,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:33:06,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:33:06,371 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:33:06,521 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:33:06,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:33:06,763 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:33:06,770 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:33:06,770 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-04 04:33:06,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:33:06 BoogieIcfgContainer [2023-08-04 04:33:06,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:33:06,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:33:06,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:33:06,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:33:06,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:33:05" (1/3) ... [2023-08-04 04:33:06,780 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d490f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:33:06, skipping insertion in model container [2023-08-04 04:33:06,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:33:06" (2/3) ... [2023-08-04 04:33:06,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d490f0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:33:06, skipping insertion in model container [2023-08-04 04:33:06,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:33:06" (3/3) ... [2023-08-04 04:33:06,783 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_34-traces-minepp-L-needs-to-be-um_true_bound2.i [2023-08-04 04:33:06,792 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:33:06,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:33:06,802 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:33:06,803 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:33:06,879 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:33:06,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 92 transitions, 189 flow [2023-08-04 04:33:06,989 INFO L124 PetriNetUnfolderBase]: 6/127 cut-off events. [2023-08-04 04:33:06,989 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:06,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 127 events. 6/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-04 04:33:06,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 92 transitions, 189 flow [2023-08-04 04:33:07,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 83 transitions, 169 flow [2023-08-04 04:33:07,006 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:33:07,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 83 transitions, 169 flow [2023-08-04 04:33:07,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 83 transitions, 169 flow [2023-08-04 04:33:07,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 83 transitions, 169 flow [2023-08-04 04:33:07,074 INFO L124 PetriNetUnfolderBase]: 4/110 cut-off events. [2023-08-04 04:33:07,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:07,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 4/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 168 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2023-08-04 04:33:07,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 1088 [2023-08-04 04:33:10,091 INFO L134 LiptonReduction]: Checked pairs total: 2915 [2023-08-04 04:33:10,091 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-04 04:33:10,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:33:10,108 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;@2a7dcd3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:33:10,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:33:10,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:33:10,114 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-04 04:33:10,114 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:10,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:10,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:33:10,115 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:10,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:10,120 INFO L85 PathProgramCache]: Analyzing trace with hash 691939544, now seen corresponding path program 1 times [2023-08-04 04:33:10,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:10,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715033569] [2023-08-04 04:33:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:10,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:10,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:10,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715033569] [2023-08-04 04:33:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715033569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:10,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:33:10,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075816159] [2023-08-04 04:33:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:10,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:33:10,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:10,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:33:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:33:10,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 156 [2023-08-04 04:33:10,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2023-08-04 04:33:10,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:10,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 156 [2023-08-04 04:33:10,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:10,477 INFO L124 PetriNetUnfolderBase]: 41/108 cut-off events. [2023-08-04 04:33:10,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:10,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 108 events. 41/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 378 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 187. Up to 78 conditions per place. [2023-08-04 04:33:10,480 INFO L140 encePairwiseOnDemand]: 152/156 looper letters, 17 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 04:33:10,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 99 flow [2023-08-04 04:33:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:33:10,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:33:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-04 04:33:10,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854700854700855 [2023-08-04 04:33:10,501 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-04 04:33:10,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-04 04:33:10,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:10,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-04 04:33:10,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2023-08-04 04:33:10,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-08-04 04:33:10,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 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) [2023-08-04 04:33:10,519 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 47 flow. Second operand 3 states and 274 transitions. [2023-08-04 04:33:10,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 99 flow [2023-08-04 04:33:10,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 99 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:33:10,522 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 57 flow [2023-08-04 04:33:10,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-04 04:33:10,527 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-04 04:33:10,527 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 57 flow [2023-08-04 04:33:10,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2023-08-04 04:33:10,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:10,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:10,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:33:10,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:10,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:10,537 INFO L85 PathProgramCache]: Analyzing trace with hash -376619152, now seen corresponding path program 1 times [2023-08-04 04:33:10,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:10,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816486399] [2023-08-04 04:33:10,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:10,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816486399] [2023-08-04 04:33:10,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816486399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:33:10,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252214299] [2023-08-04 04:33:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:10,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:10,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:33:10,637 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) [2023-08-04 04:33:10,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:33:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:10,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:33:10,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:33:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:10,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:33:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:10,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252214299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:33:10,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:33:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:33:10,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653615755] [2023-08-04 04:33:10,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:33:10,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:33:10,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:33:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:33:10,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 156 [2023-08-04 04:33:10,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 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) [2023-08-04 04:33:10,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:10,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 156 [2023-08-04 04:33:10,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:10,954 INFO L124 PetriNetUnfolderBase]: 10/35 cut-off events. [2023-08-04 04:33:10,954 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 04:33:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 35 events. 10/35 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 6/39 useless extension candidates. Maximal degree in co-relation 71. Up to 22 conditions per place. [2023-08-04 04:33:10,955 INFO L140 encePairwiseOnDemand]: 152/156 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-04 04:33:10,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 20 transitions, 79 flow [2023-08-04 04:33:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 349 transitions. [2023-08-04 04:33:10,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592948717948718 [2023-08-04 04:33:10,957 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 349 transitions. [2023-08-04 04:33:10,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 349 transitions. [2023-08-04 04:33:10,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:10,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 349 transitions. [2023-08-04 04:33:10,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 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) [2023-08-04 04:33:10,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 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) [2023-08-04 04:33:10,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 156.0) internal successors, (780), 5 states have internal predecessors, (780), 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) [2023-08-04 04:33:10,961 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 57 flow. Second operand 4 states and 349 transitions. [2023-08-04 04:33:10,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 20 transitions, 79 flow [2023-08-04 04:33:10,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 73 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:33:10,962 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 04:33:10,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 04:33:10,963 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, -4 predicate places. [2023-08-04 04:33:10,963 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 04:33:10,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.2) internal successors, (426), 5 states have internal predecessors, (426), 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) [2023-08-04 04:33:10,966 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:33:10,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 04:33:11,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:11,172 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 04:33:11,174 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:33:11,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 92 transitions, 189 flow [2023-08-04 04:33:11,202 INFO L124 PetriNetUnfolderBase]: 6/127 cut-off events. [2023-08-04 04:33:11,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:11,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 127 events. 6/127 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 228 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-08-04 04:33:11,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 92 transitions, 189 flow [2023-08-04 04:33:11,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 61 transitions, 127 flow [2023-08-04 04:33:11,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:33:11,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 61 transitions, 127 flow [2023-08-04 04:33:11,207 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 61 transitions, 127 flow [2023-08-04 04:33:11,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 127 flow [2023-08-04 04:33:11,216 INFO L124 PetriNetUnfolderBase]: 0/65 cut-off events. [2023-08-04 04:33:11,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:11,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 0/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-04 04:33:11,217 INFO L119 LiptonReduction]: Number of co-enabled transitions 340 [2023-08-04 04:33:14,080 INFO L134 LiptonReduction]: Checked pairs total: 260 [2023-08-04 04:33:14,081 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-04 04:33:14,083 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:33:14,084 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;@2a7dcd3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:33:14,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:33:14,101 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:33:14,101 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-04 04:33:14,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:33:14,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:14,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:33:14,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:33:14,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash 11363920, now seen corresponding path program 1 times [2023-08-04 04:33:14,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:14,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628090682] [2023-08-04 04:33:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:14,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:33:14,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:33:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:33:14,150 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:33:14,151 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:33:14,151 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:33:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:33:14,151 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:33:14,152 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:33:14,153 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:33:14,153 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:33:14,166 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:33:14,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 110 transitions, 232 flow [2023-08-04 04:33:14,191 INFO L124 PetriNetUnfolderBase]: 9/185 cut-off events. [2023-08-04 04:33:14,192 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:33:14,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 185 events. 9/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-08-04 04:33:14,193 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 110 transitions, 232 flow [2023-08-04 04:33:14,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 101 transitions, 210 flow [2023-08-04 04:33:14,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:33:14,194 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 101 transitions, 210 flow [2023-08-04 04:33:14,194 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 101 transitions, 210 flow [2023-08-04 04:33:14,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 101 transitions, 210 flow [2023-08-04 04:33:14,210 INFO L124 PetriNetUnfolderBase]: 6/160 cut-off events. [2023-08-04 04:33:14,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:33:14,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 160 events. 6/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 338 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 112. Up to 6 conditions per place. [2023-08-04 04:33:14,215 INFO L119 LiptonReduction]: Number of co-enabled transitions 2788 [2023-08-04 04:33:16,723 INFO L134 LiptonReduction]: Checked pairs total: 8890 [2023-08-04 04:33:16,724 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-04 04:33:16,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:33:16,726 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;@2a7dcd3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:33:16,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:33:16,729 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:33:16,729 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-04 04:33:16,729 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:33:16,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:16,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 04:33:16,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:16,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:16,730 INFO L85 PathProgramCache]: Analyzing trace with hash -299021328, now seen corresponding path program 1 times [2023-08-04 04:33:16,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:16,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244342510] [2023-08-04 04:33:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:16,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244342510] [2023-08-04 04:33:16,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244342510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:16,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:16,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:33:16,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569073448] [2023-08-04 04:33:16,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:16,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:33:16,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:16,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:33:16,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:33:16,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 180 [2023-08-04 04:33:16,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2023-08-04 04:33:16,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:16,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 180 [2023-08-04 04:33:16,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:16,980 INFO L124 PetriNetUnfolderBase]: 691/1374 cut-off events. [2023-08-04 04:33:16,980 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:33:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 1374 events. 691/1374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8230 event pairs, 428 based on Foata normal form. 0/1263 useless extension candidates. Maximal degree in co-relation 402. Up to 1118 conditions per place. [2023-08-04 04:33:16,989 INFO L140 encePairwiseOnDemand]: 176/180 looper letters, 28 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 04:33:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 150 flow [2023-08-04 04:33:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:33:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:33:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 04:33:16,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203703703703703 [2023-08-04 04:33:16,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 04:33:16,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 04:33:16,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:16,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 04:33:16,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:33:16,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:16,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:16,994 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 76 flow. Second operand 3 states and 335 transitions. [2023-08-04 04:33:16,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 150 flow [2023-08-04 04:33:16,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 150 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:33:16,996 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 90 flow [2023-08-04 04:33:16,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-08-04 04:33:16,997 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-04 04:33:16,997 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 90 flow [2023-08-04 04:33:16,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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) [2023-08-04 04:33:16,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:16,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:33:16,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:16,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash -644205049, now seen corresponding path program 1 times [2023-08-04 04:33:16,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:16,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577385282] [2023-08-04 04:33:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:17,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:17,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:17,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577385282] [2023-08-04 04:33:17,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577385282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:33:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046372132] [2023-08-04 04:33:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:17,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:17,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:33:17,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:33:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:33:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:17,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:33:17,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:33:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:17,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:33:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046372132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:33:17,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:33:17,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:33:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179918698] [2023-08-04 04:33:17,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:33:17,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:33:17,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:33:17,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:33:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 180 [2023-08-04 04:33:17,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 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) [2023-08-04 04:33:17,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:17,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 180 [2023-08-04 04:33:17,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:17,361 INFO L124 PetriNetUnfolderBase]: 655/1155 cut-off events. [2023-08-04 04:33:17,362 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-04 04:33:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2373 conditions, 1155 events. 655/1155 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6336 event pairs, 96 based on Foata normal form. 6/1093 useless extension candidates. Maximal degree in co-relation 411. Up to 834 conditions per place. [2023-08-04 04:33:17,367 INFO L140 encePairwiseOnDemand]: 175/180 looper letters, 38 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 04:33:17,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 53 transitions, 210 flow [2023-08-04 04:33:17,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2023-08-04 04:33:17,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-08-04 04:33:17,369 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 444 transitions. [2023-08-04 04:33:17,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 444 transitions. [2023-08-04 04:33:17,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:17,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 444 transitions. [2023-08-04 04:33:17,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 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) [2023-08-04 04:33:17,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:17,372 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:17,373 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 90 flow. Second operand 4 states and 444 transitions. [2023-08-04 04:33:17,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 53 transitions, 210 flow [2023-08-04 04:33:17,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:33:17,374 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 104 flow [2023-08-04 04:33:17,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-08-04 04:33:17,375 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-04 04:33:17,375 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 104 flow [2023-08-04 04:33:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.4) internal successors, (512), 5 states have internal predecessors, (512), 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) [2023-08-04 04:33:17,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:17,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:17,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:33:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:17,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:17,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 2041014653, now seen corresponding path program 1 times [2023-08-04 04:33:17,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:17,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662680045] [2023-08-04 04:33:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:17,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:33:17,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:17,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662680045] [2023-08-04 04:33:17,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662680045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:17,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:17,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:33:17,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535681348] [2023-08-04 04:33:17,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:17,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:33:17,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:33:17,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:33:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 180 [2023-08-04 04:33:17,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-04 04:33:17,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:17,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 180 [2023-08-04 04:33:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:17,891 INFO L124 PetriNetUnfolderBase]: 972/1928 cut-off events. [2023-08-04 04:33:17,891 INFO L125 PetriNetUnfolderBase]: For 623/623 co-relation queries the response was YES. [2023-08-04 04:33:17,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4009 conditions, 1928 events. 972/1928 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12099 event pairs, 502 based on Foata normal form. 62/1891 useless extension candidates. Maximal degree in co-relation 2558. Up to 956 conditions per place. [2023-08-04 04:33:17,900 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 46 selfloop transitions, 5 changer transitions 27/86 dead transitions. [2023-08-04 04:33:17,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 388 flow [2023-08-04 04:33:17,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:33:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:33:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-04 04:33:17,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2023-08-04 04:33:17,903 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-04 04:33:17,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-04 04:33:17,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:17,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-04 04:33:17,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 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) [2023-08-04 04:33:17,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2023-08-04 04:33:17,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2023-08-04 04:33:17,907 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 104 flow. Second operand 5 states and 573 transitions. [2023-08-04 04:33:17,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 388 flow [2023-08-04 04:33:17,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 376 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 04:33:17,910 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 147 flow [2023-08-04 04:33:17,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2023-08-04 04:33:17,910 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-04 04:33:17,911 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 147 flow [2023-08-04 04:33:17,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-04 04:33:17,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:17,911 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:17,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:33:17,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:17,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:17,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1365192520, now seen corresponding path program 1 times [2023-08-04 04:33:17,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:17,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674197492] [2023-08-04 04:33:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:18,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:18,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674197492] [2023-08-04 04:33:18,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674197492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:33:18,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805029055] [2023-08-04 04:33:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:18,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:33:18,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:33:18,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 04:33:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:18,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 04:33:18,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:33:18,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 04:33:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:33:18,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:33:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:18,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:33:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805029055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:18,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:33:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-08-04 04:33:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277604417] [2023-08-04 04:33:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:33:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:33:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:33:18,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 180 [2023-08-04 04:33:18,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 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) [2023-08-04 04:33:18,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:18,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 180 [2023-08-04 04:33:18,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:18,737 INFO L124 PetriNetUnfolderBase]: 1372/2565 cut-off events. [2023-08-04 04:33:18,737 INFO L125 PetriNetUnfolderBase]: For 1528/1543 co-relation queries the response was YES. [2023-08-04 04:33:18,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6488 conditions, 2565 events. 1372/2565 cut-off events. For 1528/1543 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15469 event pairs, 607 based on Foata normal form. 300/2734 useless extension candidates. Maximal degree in co-relation 5366. Up to 1345 conditions per place. [2023-08-04 04:33:18,751 INFO L140 encePairwiseOnDemand]: 166/180 looper letters, 43 selfloop transitions, 14 changer transitions 0/63 dead transitions. [2023-08-04 04:33:18,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 63 transitions, 346 flow [2023-08-04 04:33:18,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-08-04 04:33:18,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2023-08-04 04:33:18,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-08-04 04:33:18,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-08-04 04:33:18,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:18,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-08-04 04:33:18,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-04 04:33:18,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:18,758 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:18,758 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 147 flow. Second operand 4 states and 406 transitions. [2023-08-04 04:33:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 63 transitions, 346 flow [2023-08-04 04:33:18,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:33:18,767 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 206 flow [2023-08-04 04:33:18,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-04 04:33:18,768 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-04 04:33:18,768 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 206 flow [2023-08-04 04:33:18,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 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) [2023-08-04 04:33:18,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:18,768 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:18,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 04:33:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:18,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:18,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1527507732, now seen corresponding path program 1 times [2023-08-04 04:33:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942711930] [2023-08-04 04:33:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942711930] [2023-08-04 04:33:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942711930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:33:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927415258] [2023-08-04 04:33:19,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:19,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:33:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:33:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:33:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 180 [2023-08-04 04:33:19,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2023-08-04 04:33:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 180 [2023-08-04 04:33:19,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:19,376 INFO L124 PetriNetUnfolderBase]: 1472/2825 cut-off events. [2023-08-04 04:33:19,377 INFO L125 PetriNetUnfolderBase]: For 2393/2397 co-relation queries the response was YES. [2023-08-04 04:33:19,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 2825 events. 1472/2825 cut-off events. For 2393/2397 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18111 event pairs, 614 based on Foata normal form. 53/2760 useless extension candidates. Maximal degree in co-relation 7094. Up to 2052 conditions per place. [2023-08-04 04:33:19,391 INFO L140 encePairwiseOnDemand]: 167/180 looper letters, 51 selfloop transitions, 18 changer transitions 3/79 dead transitions. [2023-08-04 04:33:19,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 495 flow [2023-08-04 04:33:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:33:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:33:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-04 04:33:19,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6092592592592593 [2023-08-04 04:33:19,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-04 04:33:19,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-04 04:33:19,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:19,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-04 04:33:19,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2023-08-04 04:33:19,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:19,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:19,395 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 206 flow. Second operand 3 states and 329 transitions. [2023-08-04 04:33:19,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 495 flow [2023-08-04 04:33:19,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:33:19,402 INFO L231 Difference]: Finished difference. Result has 52 places, 61 transitions, 354 flow [2023-08-04 04:33:19,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=52, PETRI_TRANSITIONS=61} [2023-08-04 04:33:19,402 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-04 04:33:19,402 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 61 transitions, 354 flow [2023-08-04 04:33:19,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2023-08-04 04:33:19,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:19,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 04:33:19,403 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:19,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash 261488848, now seen corresponding path program 2 times [2023-08-04 04:33:19,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:19,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955755965] [2023-08-04 04:33:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:33:19,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955755965] [2023-08-04 04:33:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955755965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:19,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:19,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:33:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521773959] [2023-08-04 04:33:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:33:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:33:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:33:19,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 180 [2023-08-04 04:33:19,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 61 transitions, 354 flow. Second operand has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 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) [2023-08-04 04:33:19,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:19,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 180 [2023-08-04 04:33:19,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:19,874 INFO L124 PetriNetUnfolderBase]: 1248/2549 cut-off events. [2023-08-04 04:33:19,874 INFO L125 PetriNetUnfolderBase]: For 3537/3540 co-relation queries the response was YES. [2023-08-04 04:33:19,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9241 conditions, 2549 events. 1248/2549 cut-off events. For 3537/3540 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16716 event pairs, 405 based on Foata normal form. 97/2636 useless extension candidates. Maximal degree in co-relation 8536. Up to 1367 conditions per place. [2023-08-04 04:33:19,889 INFO L140 encePairwiseOnDemand]: 166/180 looper letters, 68 selfloop transitions, 27 changer transitions 6/107 dead transitions. [2023-08-04 04:33:19,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 107 transitions, 835 flow [2023-08-04 04:33:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-08-04 04:33:19,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2023-08-04 04:33:19,891 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-08-04 04:33:19,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-08-04 04:33:19,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:19,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-08-04 04:33:19,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 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) [2023-08-04 04:33:19,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:19,893 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:19,893 INFO L175 Difference]: Start difference. First operand has 52 places, 61 transitions, 354 flow. Second operand 4 states and 406 transitions. [2023-08-04 04:33:19,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 107 transitions, 835 flow [2023-08-04 04:33:19,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 107 transitions, 787 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-04 04:33:19,906 INFO L231 Difference]: Finished difference. Result has 54 places, 76 transitions, 524 flow [2023-08-04 04:33:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=54, PETRI_TRANSITIONS=76} [2023-08-04 04:33:19,907 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-04 04:33:19,908 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 76 transitions, 524 flow [2023-08-04 04:33:19,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.4) internal successors, (447), 5 states have internal predecessors, (447), 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) [2023-08-04 04:33:19,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:19,908 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:19,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:33:19,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:19,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1819370585, now seen corresponding path program 1 times [2023-08-04 04:33:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077254724] [2023-08-04 04:33:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:20,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077254724] [2023-08-04 04:33:20,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077254724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:20,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:20,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:33:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587756238] [2023-08-04 04:33:20,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:20,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:33:20,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:33:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:33:20,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 180 [2023-08-04 04:33:20,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 76 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 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) [2023-08-04 04:33:20,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:20,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 180 [2023-08-04 04:33:20,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:20,250 INFO L124 PetriNetUnfolderBase]: 551/1306 cut-off events. [2023-08-04 04:33:20,250 INFO L125 PetriNetUnfolderBase]: For 2229/2257 co-relation queries the response was YES. [2023-08-04 04:33:20,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1306 events. 551/1306 cut-off events. For 2229/2257 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8056 event pairs, 184 based on Foata normal form. 53/1344 useless extension candidates. Maximal degree in co-relation 5000. Up to 708 conditions per place. [2023-08-04 04:33:20,257 INFO L140 encePairwiseOnDemand]: 170/180 looper letters, 41 selfloop transitions, 24 changer transitions 6/88 dead transitions. [2023-08-04 04:33:20,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 88 transitions, 709 flow [2023-08-04 04:33:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 424 transitions. [2023-08-04 04:33:20,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-04 04:33:20,259 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 424 transitions. [2023-08-04 04:33:20,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 424 transitions. [2023-08-04 04:33:20,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:20,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 424 transitions. [2023-08-04 04:33:20,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 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) [2023-08-04 04:33:20,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:20,262 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:20,262 INFO L175 Difference]: Start difference. First operand has 54 places, 76 transitions, 524 flow. Second operand 4 states and 424 transitions. [2023-08-04 04:33:20,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 88 transitions, 709 flow [2023-08-04 04:33:20,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 701 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:33:20,267 INFO L231 Difference]: Finished difference. Result has 56 places, 68 transitions, 539 flow [2023-08-04 04:33:20,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=539, PETRI_PLACES=56, PETRI_TRANSITIONS=68} [2023-08-04 04:33:20,267 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-04 04:33:20,267 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 68 transitions, 539 flow [2023-08-04 04:33:20,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.25) internal successors, (389), 4 states have internal predecessors, (389), 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) [2023-08-04 04:33:20,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:20,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:20,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 04:33:20,268 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:20,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1842436479, now seen corresponding path program 1 times [2023-08-04 04:33:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:20,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348345393] [2023-08-04 04:33:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:20,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348345393] [2023-08-04 04:33:20,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348345393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:20,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:20,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:33:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477108761] [2023-08-04 04:33:20,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:20,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:33:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:33:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:33:20,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 180 [2023-08-04 04:33:20,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 539 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2023-08-04 04:33:20,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:20,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 180 [2023-08-04 04:33:20,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:20,573 INFO L124 PetriNetUnfolderBase]: 681/1600 cut-off events. [2023-08-04 04:33:20,573 INFO L125 PetriNetUnfolderBase]: For 4043/4048 co-relation queries the response was YES. [2023-08-04 04:33:20,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7450 conditions, 1600 events. 681/1600 cut-off events. For 4043/4048 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 10623 event pairs, 116 based on Foata normal form. 75/1663 useless extension candidates. Maximal degree in co-relation 7438. Up to 1135 conditions per place. [2023-08-04 04:33:20,582 INFO L140 encePairwiseOnDemand]: 167/180 looper letters, 75 selfloop transitions, 38 changer transitions 4/122 dead transitions. [2023-08-04 04:33:20,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 122 transitions, 1230 flow [2023-08-04 04:33:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:33:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:33:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-04 04:33:20,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6092592592592593 [2023-08-04 04:33:20,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-04 04:33:20,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-04 04:33:20,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:20,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-04 04:33:20,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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) [2023-08-04 04:33:20,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:20,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 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) [2023-08-04 04:33:20,586 INFO L175 Difference]: Start difference. First operand has 56 places, 68 transitions, 539 flow. Second operand 3 states and 329 transitions. [2023-08-04 04:33:20,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 122 transitions, 1230 flow [2023-08-04 04:33:20,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 122 transitions, 1229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:33:20,592 INFO L231 Difference]: Finished difference. Result has 58 places, 103 transitions, 1059 flow [2023-08-04 04:33:20,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1059, PETRI_PLACES=58, PETRI_TRANSITIONS=103} [2023-08-04 04:33:20,593 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-04 04:33:20,593 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 103 transitions, 1059 flow [2023-08-04 04:33:20,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2023-08-04 04:33:20,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:20,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:20,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 04:33:20,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:20,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:20,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1214537861, now seen corresponding path program 2 times [2023-08-04 04:33:20,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:20,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412763393] [2023-08-04 04:33:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:20,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412763393] [2023-08-04 04:33:20,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412763393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:33:20,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340288215] [2023-08-04 04:33:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 04:33:20,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:33:20,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:33:20,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 04:33:20,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 04:33:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 04:33:20,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 04:33:20,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:33:20,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 04:33:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:33:20,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:33:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:33:20,928 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:33:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:33:20,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:33:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:33:20,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:33:20,988 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_234 (Array Int Int))) (not (= (select (select (store |c_#pthreadsMutex| |c_~#C~0.base| v_ArrVal_234) |c_~#A~0.base|) |c_~#A~0.offset|) 0))) is different from false [2023-08-04 04:33:21,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:33:21,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-08-04 04:33:21,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-08-04 04:33:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-08-04 04:33:21,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340288215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:33:21,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:33:21,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-04 04:33:21,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226756895] [2023-08-04 04:33:21,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:33:21,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 04:33:21,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:21,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 04:33:21,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=85, Unknown=3, NotChecked=20, Total=156 [2023-08-04 04:33:21,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 180 [2023-08-04 04:33:21,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 103 transitions, 1059 flow. Second operand has 13 states, 13 states have (on average 67.76923076923077) internal successors, (881), 13 states have internal predecessors, (881), 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) [2023-08-04 04:33:21,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:21,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 180 [2023-08-04 04:33:21,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:21,264 INFO L124 PetriNetUnfolderBase]: 124/448 cut-off events. [2023-08-04 04:33:21,264 INFO L125 PetriNetUnfolderBase]: For 1457/1457 co-relation queries the response was YES. [2023-08-04 04:33:21,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 448 events. 124/448 cut-off events. For 1457/1457 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2423 event pairs, 51 based on Foata normal form. 46/488 useless extension candidates. Maximal degree in co-relation 2112. Up to 339 conditions per place. [2023-08-04 04:33:21,266 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 38 selfloop transitions, 11 changer transitions 9/62 dead transitions. [2023-08-04 04:33:21,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 650 flow [2023-08-04 04:33:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 300 transitions. [2023-08-04 04:33:21,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-04 04:33:21,268 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 300 transitions. [2023-08-04 04:33:21,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 300 transitions. [2023-08-04 04:33:21,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:21,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 300 transitions. [2023-08-04 04:33:21,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 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) [2023-08-04 04:33:21,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:21,271 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:21,271 INFO L175 Difference]: Start difference. First operand has 58 places, 103 transitions, 1059 flow. Second operand 4 states and 300 transitions. [2023-08-04 04:33:21,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 650 flow [2023-08-04 04:33:21,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 62 transitions, 618 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-04 04:33:21,275 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 416 flow [2023-08-04 04:33:21,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-04 04:33:21,276 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-08-04 04:33:21,276 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 416 flow [2023-08-04 04:33:21,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.76923076923077) internal successors, (881), 13 states have internal predecessors, (881), 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) [2023-08-04 04:33:21,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:21,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:21,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 04:33:21,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:33:21,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:21,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1995460452, now seen corresponding path program 1 times [2023-08-04 04:33:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:21,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101942835] [2023-08-04 04:33:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:21,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:33:21,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101942835] [2023-08-04 04:33:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101942835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:21,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:21,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:33:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506166073] [2023-08-04 04:33:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:21,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:33:21,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:33:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:33:21,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 180 [2023-08-04 04:33:21,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 416 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) [2023-08-04 04:33:21,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:21,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 180 [2023-08-04 04:33:21,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:21,807 INFO L124 PetriNetUnfolderBase]: 97/334 cut-off events. [2023-08-04 04:33:21,807 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2023-08-04 04:33:21,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1547 conditions, 334 events. 97/334 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1510 event pairs, 31 based on Foata normal form. 6/336 useless extension candidates. Maximal degree in co-relation 1534. Up to 194 conditions per place. [2023-08-04 04:33:21,809 INFO L140 encePairwiseOnDemand]: 173/180 looper letters, 33 selfloop transitions, 9 changer transitions 3/50 dead transitions. [2023-08-04 04:33:21,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 491 flow [2023-08-04 04:33:21,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2023-08-04 04:33:21,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2023-08-04 04:33:21,810 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2023-08-04 04:33:21,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2023-08-04 04:33:21,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:21,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2023-08-04 04:33:21,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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) [2023-08-04 04:33:21,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:21,813 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:21,813 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 416 flow. Second operand 4 states and 392 transitions. [2023-08-04 04:33:21,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 491 flow [2023-08-04 04:33:21,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 50 transitions, 388 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-08-04 04:33:21,816 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 256 flow [2023-08-04 04:33:21,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2023-08-04 04:33:21,817 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-04 04:33:21,817 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 256 flow [2023-08-04 04:33:21,817 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) [2023-08-04 04:33:21,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:21,818 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:33:21,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 04:33:21,818 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:33:21,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:21,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1120468488, now seen corresponding path program 2 times [2023-08-04 04:33:21,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792427250] [2023-08-04 04:33:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:33:21,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:21,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792427250] [2023-08-04 04:33:21,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792427250] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:21,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:21,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:33:21,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645517077] [2023-08-04 04:33:21,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:21,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:33:21,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:33:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:33:22,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 180 [2023-08-04 04:33:22,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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) [2023-08-04 04:33:22,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:22,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 180 [2023-08-04 04:33:22,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:22,221 INFO L124 PetriNetUnfolderBase]: 74/250 cut-off events. [2023-08-04 04:33:22,221 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2023-08-04 04:33:22,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 250 events. 74/250 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1023 event pairs, 47 based on Foata normal form. 4/254 useless extension candidates. Maximal degree in co-relation 961. Up to 130 conditions per place. [2023-08-04 04:33:22,222 INFO L140 encePairwiseOnDemand]: 170/180 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2023-08-04 04:33:22,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 44 transitions, 361 flow [2023-08-04 04:33:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:22,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 381 transitions. [2023-08-04 04:33:22,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2023-08-04 04:33:22,224 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 381 transitions. [2023-08-04 04:33:22,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 381 transitions. [2023-08-04 04:33:22,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:22,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 381 transitions. [2023-08-04 04:33:22,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:33:22,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:22,227 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 180.0) internal successors, (900), 5 states have internal predecessors, (900), 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) [2023-08-04 04:33:22,227 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 256 flow. Second operand 4 states and 381 transitions. [2023-08-04 04:33:22,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 44 transitions, 361 flow [2023-08-04 04:33:22,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 334 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 04:33:22,229 INFO L231 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2023-08-04 04:33:22,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2023-08-04 04:33:22,229 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-08-04 04:33:22,229 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2023-08-04 04:33:22,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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) [2023-08-04 04:33:22,230 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 04:33:22,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:33:22,230 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 04:33:22,230 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 04:33:22,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 110 transitions, 232 flow [2023-08-04 04:33:22,243 INFO L124 PetriNetUnfolderBase]: 9/185 cut-off events. [2023-08-04 04:33:22,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:33:22,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 185 events. 9/185 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 458 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 128. Up to 6 conditions per place. [2023-08-04 04:33:22,244 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 110 transitions, 232 flow [2023-08-04 04:33:22,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 79 transitions, 170 flow [2023-08-04 04:33:22,245 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:33:22,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 79 transitions, 170 flow [2023-08-04 04:33:22,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 79 transitions, 170 flow [2023-08-04 04:33:22,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 79 transitions, 170 flow [2023-08-04 04:33:22,265 INFO L124 PetriNetUnfolderBase]: 0/92 cut-off events. [2023-08-04 04:33:22,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:33:22,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 92 events. 0/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-04 04:33:22,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 1292 [2023-08-04 04:33:25,021 INFO L134 LiptonReduction]: Checked pairs total: 5217 [2023-08-04 04:33:25,021 INFO L136 LiptonReduction]: Total number of compositions: 56 [2023-08-04 04:33:25,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:33:25,022 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;@2a7dcd3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:33:25,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:33:25,025 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:33:25,025 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 04:33:25,025 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:33:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:33:25,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-04 04:33:25,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:33:25,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:33:25,026 INFO L85 PathProgramCache]: Analyzing trace with hash -860832672, now seen corresponding path program 1 times [2023-08-04 04:33:25,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:33:25,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152240554] [2023-08-04 04:33:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:33:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:33:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:33:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:33:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:33:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152240554] [2023-08-04 04:33:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152240554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:33:25,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:33:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:33:25,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619116642] [2023-08-04 04:33:25,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:33:25,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:33:25,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:33:25,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:33:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:33:25,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 166 [2023-08-04 04:33:25,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 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) [2023-08-04 04:33:25,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:33:25,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 166 [2023-08-04 04:33:25,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:33:25,107 INFO L124 PetriNetUnfolderBase]: 40/131 cut-off events. [2023-08-04 04:33:25,107 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:33:25,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 131 events. 40/131 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 487 event pairs, 0 based on Foata normal form. 42/171 useless extension candidates. Maximal degree in co-relation 44. Up to 88 conditions per place. [2023-08-04 04:33:25,108 INFO L140 encePairwiseOnDemand]: 164/166 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-04 04:33:25,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 108 flow [2023-08-04 04:33:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:33:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:33:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2023-08-04 04:33:25,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6400602409638554 [2023-08-04 04:33:25,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2023-08-04 04:33:25,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2023-08-04 04:33:25,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:33:25,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2023-08-04 04:33:25,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 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) [2023-08-04 04:33:25,112 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) [2023-08-04 04:33:25,112 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) [2023-08-04 04:33:25,112 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 4 states and 425 transitions. [2023-08-04 04:33:25,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 108 flow [2023-08-04 04:33:25,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:33:25,113 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-04 04:33:25,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=166, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, 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=4, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-04 04:33:25,113 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-04 04:33:25,113 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-04 04:33:25,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 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) [2023-08-04 04:33:25,114 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:33:25,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:33:25,114 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:33:25,115 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 04:33:25,115 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 04:33:25,115 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 04:33:25,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 04:33:25 BasicIcfg [2023-08-04 04:33:25,121 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 04:33:25,121 INFO L158 Benchmark]: Toolchain (without parser) took 19314.21ms. Allocated memory was 513.8MB in the beginning and 759.2MB in the end (delta: 245.4MB). Free memory was 460.5MB in the beginning and 437.5MB in the end (delta: 23.0MB). Peak memory consumption was 269.2MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,121 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 337.6MB. Free memory is still 286.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:33:25,122 INFO L158 Benchmark]: CACSL2BoogieTranslator took 391.20ms. Allocated memory is still 513.8MB. Free memory was 460.5MB in the beginning and 440.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.06ms. Allocated memory is still 513.8MB. Free memory was 440.7MB in the beginning and 438.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,122 INFO L158 Benchmark]: Boogie Preprocessor took 30.33ms. Allocated memory is still 513.8MB. Free memory was 438.6MB in the beginning and 437.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,122 INFO L158 Benchmark]: RCFGBuilder took 476.37ms. Allocated memory is still 513.8MB. Free memory was 437.4MB in the beginning and 422.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,123 INFO L158 Benchmark]: TraceAbstraction took 18344.68ms. Allocated memory was 513.8MB in the beginning and 759.2MB in the end (delta: 245.4MB). Free memory was 422.3MB in the beginning and 437.5MB in the end (delta: -15.2MB). Peak memory consumption was 231.5MB. Max. memory is 16.0GB. [2023-08-04 04:33:25,126 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 337.6MB. Free memory is still 286.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 391.20ms. Allocated memory is still 513.8MB. Free memory was 460.5MB in the beginning and 440.7MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 65.06ms. Allocated memory is still 513.8MB. Free memory was 440.7MB in the beginning and 438.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.33ms. Allocated memory is still 513.8MB. Free memory was 438.6MB in the beginning and 437.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 476.37ms. Allocated memory is still 513.8MB. Free memory was 437.4MB in the beginning and 422.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 18344.68ms. Allocated memory was 513.8MB in the beginning and 759.2MB in the end (delta: 245.4MB). Free memory was 422.3MB in the beginning and 437.5MB in the end (delta: -15.2MB). Peak memory consumption was 231.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 84 PlacesBefore, 24 PlacesAfterwards, 83 TransitionsBefore, 22 TransitionsAfterwards, 1088 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 64 TotalNumberOfCompositions, 2915 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1115, independent: 931, independent conditional: 0, independent unconditional: 931, dependent: 184, dependent conditional: 0, dependent unconditional: 184, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 546, independent: 503, independent conditional: 0, independent unconditional: 503, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1115, independent: 428, independent conditional: 0, independent unconditional: 428, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 546, unknown conditional: 0, unknown unconditional: 546] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 29, Positive conditional cache size: 0, Positive unconditional cache size: 29, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 64 PlacesBefore, 8 PlacesAfterwards, 61 TransitionsBefore, 5 TransitionsAfterwards, 340 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 59 TotalNumberOfCompositions, 260 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 260, independent: 260, independent conditional: 0, independent unconditional: 260, 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: 172, independent: 172, independent conditional: 0, independent unconditional: 172, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 260, independent: 88, independent conditional: 0, independent unconditional: 88, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 172, unknown conditional: 0, unknown unconditional: 172] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 104 PlacesBefore, 38 PlacesAfterwards, 101 TransitionsBefore, 34 TransitionsAfterwards, 2788 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 70 TotalNumberOfCompositions, 8890 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2656, independent: 2359, independent conditional: 0, independent unconditional: 2359, dependent: 297, dependent conditional: 0, dependent unconditional: 297, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1267, independent: 1214, independent conditional: 0, independent unconditional: 1214, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2656, independent: 1145, independent conditional: 0, independent unconditional: 1145, dependent: 244, dependent conditional: 0, dependent unconditional: 244, unknown: 1267, unknown conditional: 0, unknown unconditional: 1267] , Statistics on independence cache: Total cache size (in pairs): 153, Positive cache size: 116, Positive conditional cache size: 0, Positive unconditional cache size: 116, Negative cache size: 37, Negative conditional cache size: 0, Negative unconditional cache size: 37, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 84 PlacesBefore, 31 PlacesAfterwards, 79 TransitionsBefore, 26 TransitionsAfterwards, 1292 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 18 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 56 TotalNumberOfCompositions, 5217 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1795, independent: 1526, independent conditional: 0, independent unconditional: 1526, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 613, independent: 584, independent conditional: 0, independent unconditional: 584, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1795, independent: 942, independent conditional: 0, independent unconditional: 942, dependent: 240, dependent conditional: 0, dependent unconditional: 240, unknown: 613, unknown conditional: 0, unknown unconditional: 613] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 62, Positive conditional cache size: 0, Positive unconditional cache size: 62, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 108 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 2 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=1, InterpolantAutomatonStates: 7, 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, 0.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 55 SizeOfPredicates, 0 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 2 thread instances CFG has 4 procedures, 126 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.1s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 922 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 493 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 70 IncrementalHoareTripleChecker+Unchecked, 79 mSDsCounter, 299 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1741 IncrementalHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 299 mSolverCounterUnsat, 74 mSDtfsCounter, 1741 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1059occurred in iteration=8, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 257 ConstructedInterpolants, 6 QuantifiedInterpolants, 1550 SizeOfPredicates, 5 NumberOfNonLiveVariables, 510 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 16 InterpolantComputations, 9 PerfectInterpolantSequences, 52/75 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 1 thread instances CFG has 3 procedures, 108 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, 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, 126 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 40 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 43 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=64occurred 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, 0.0s 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 04:33:25,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...