./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 09:38:32,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 09:38:32,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 09:38:32,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 09:38:32,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 09:38:32,694 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 09:38:32,695 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 09:38:32,696 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 09:38:32,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 09:38:32,697 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 09:38:32,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 09:38:32,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 09:38:32,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 09:38:32,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 09:38:32,701 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 09:38:32,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 09:38:32,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 09:38:32,702 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 09:38:32,702 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 09:38:32,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 09:38:32,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 09:38:32,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 09:38:32,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 09:38:32,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 09:38:32,708 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 09:38:32,708 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 09:38:32,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 09:38:32,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 09:38:32,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 09:38:32,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 09:38:32,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 09:38:32,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 09:38:32,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:38:32,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 09:38:32,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 09:38:32,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 09:38:32,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 09:38:32,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 09:38:32,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 09:38:32,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 09:38:32,713 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 09:38:32,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 09:38:32,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2024-11-08 09:38:32,976 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 09:38:33,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 09:38:33,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 09:38:33,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 09:38:33,005 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 09:38:33,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2024-11-08 09:38:34,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 09:38:34,665 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 09:38:34,666 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2024-11-08 09:38:34,673 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a2123fe/50f6ef7a25864918a639902bc54e9d5b/FLAG88e697245 [2024-11-08 09:38:34,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76a2123fe/50f6ef7a25864918a639902bc54e9d5b [2024-11-08 09:38:34,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 09:38:34,690 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 09:38:34,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 09:38:34,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 09:38:34,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 09:38:34,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:34,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@982734e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34, skipping insertion in model container [2024-11-08 09:38:34,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:34,720 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 09:38:34,892 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2024-11-08 09:38:34,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:38:34,937 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 09:38:34,947 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2024-11-08 09:38:34,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:38:34,975 INFO L204 MainTranslator]: Completed translation [2024-11-08 09:38:34,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34 WrapperNode [2024-11-08 09:38:34,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 09:38:34,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 09:38:34,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 09:38:34,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 09:38:34,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:34,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,016 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 138 [2024-11-08 09:38:35,016 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 09:38:35,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 09:38:35,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 09:38:35,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 09:38:35,028 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,031 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,045 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 7, 3]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-11-08 09:38:35,045 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,062 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 09:38:35,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 09:38:35,066 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 09:38:35,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 09:38:35,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (1/1) ... [2024-11-08 09:38:35,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:38:35,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:35,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 09:38:35,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 09:38:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 09:38:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 09:38:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 09:38:35,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 09:38:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 09:38:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 09:38:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 09:38:35,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-08 09:38:35,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-08 09:38:35,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 09:38:35,230 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 09:38:35,232 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 09:38:35,462 INFO L? ?]: Removed 32 outVars from TransFormulas that were not future-live. [2024-11-08 09:38:35,462 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 09:38:35,479 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 09:38:35,479 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-08 09:38:35,479 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:38:35 BoogieIcfgContainer [2024-11-08 09:38:35,479 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 09:38:35,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 09:38:35,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 09:38:35,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 09:38:35,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 09:38:34" (1/3) ... [2024-11-08 09:38:35,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230de047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:38:35, skipping insertion in model container [2024-11-08 09:38:35,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:38:34" (2/3) ... [2024-11-08 09:38:35,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230de047 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:38:35, skipping insertion in model container [2024-11-08 09:38:35,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:38:35" (3/3) ... [2024-11-08 09:38:35,488 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2024-11-08 09:38:35,502 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 09:38:35,502 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 09:38:35,559 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 09:38:35,565 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1be04194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 09:38:35,565 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 09:38:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 09:38:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-08 09:38:35,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:35,575 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:35,576 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:35,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:35,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2024-11-08 09:38:35,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:35,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683788927] [2024-11-08 09:38:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:38:35,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:35,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683788927] [2024-11-08 09:38:35,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683788927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:35,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:35,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:38:35,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875096114] [2024-11-08 09:38:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:35,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:38:35,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:35,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:38:35,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:35,821 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:35,893 INFO L93 Difference]: Finished difference Result 92 states and 144 transitions. [2024-11-08 09:38:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:38:35,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-08 09:38:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:35,905 INFO L225 Difference]: With dead ends: 92 [2024-11-08 09:38:35,905 INFO L226 Difference]: Without dead ends: 51 [2024-11-08 09:38:35,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:35,914 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:35,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 80 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:35,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-08 09:38:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2024-11-08 09:38:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 09:38:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-08 09:38:35,953 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2024-11-08 09:38:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:35,954 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-08 09:38:35,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-08 09:38:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-08 09:38:35,955 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:35,955 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:35,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 09:38:35,956 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:35,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2024-11-08 09:38:35,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:35,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052164310] [2024-11-08 09:38:35,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:38:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052164310] [2024-11-08 09:38:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052164310] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731806411] [2024-11-08 09:38:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:36,082 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) [2024-11-08 09:38:36,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 09:38:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 09:38:36,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:38:36,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:38:36,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731806411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:36,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:36,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 09:38:36,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927151634] [2024-11-08 09:38:36,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:36,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 09:38:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 09:38:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:38:36,214 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:36,352 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2024-11-08 09:38:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 09:38:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-08 09:38:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:36,355 INFO L225 Difference]: With dead ends: 125 [2024-11-08 09:38:36,357 INFO L226 Difference]: Without dead ends: 92 [2024-11-08 09:38:36,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:38:36,360 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:36,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 163 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:38:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-08 09:38:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 44. [2024-11-08 09:38:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-08 09:38:36,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-11-08 09:38:36,377 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2024-11-08 09:38:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:36,378 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-11-08 09:38:36,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,378 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-11-08 09:38:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-08 09:38:36,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,380 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 09:38:36,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:36,585 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2024-11-08 09:38:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803340959] [2024-11-08 09:38:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:36,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:38:36,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803340959] [2024-11-08 09:38:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803340959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:36,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:36,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:38:36,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844167349] [2024-11-08 09:38:36,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:36,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:38:36,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:38:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:36,765 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:36,818 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2024-11-08 09:38:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:38:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-08 09:38:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:36,819 INFO L225 Difference]: With dead ends: 81 [2024-11-08 09:38:36,820 INFO L226 Difference]: Without dead ends: 47 [2024-11-08 09:38:36,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:36,821 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:36,822 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-08 09:38:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-11-08 09:38:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-11-08 09:38:36,829 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2024-11-08 09:38:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:36,829 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-11-08 09:38:36,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-11-08 09:38:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-08 09:38:36,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,831 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 09:38:36,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2024-11-08 09:38:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065637506] [2024-11-08 09:38:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:38:36,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:36,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065637506] [2024-11-08 09:38:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065637506] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:36,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:38:36,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471466270] [2024-11-08 09:38:36,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:36,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:38:36,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:38:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:36,936 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:36,959 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2024-11-08 09:38:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:38:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-11-08 09:38:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:36,961 INFO L225 Difference]: With dead ends: 90 [2024-11-08 09:38:36,961 INFO L226 Difference]: Without dead ends: 59 [2024-11-08 09:38:36,962 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:38:36,963 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:36,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-08 09:38:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2024-11-08 09:38:36,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-11-08 09:38:36,970 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2024-11-08 09:38:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:36,970 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-11-08 09:38:36,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-11-08 09:38:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-08 09:38:36,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:36,972 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:36,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 09:38:36,973 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:36,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2024-11-08 09:38:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:36,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208055494] [2024-11-08 09:38:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-08 09:38:37,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:37,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208055494] [2024-11-08 09:38:37,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208055494] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:37,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452328497] [2024-11-08 09:38:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:37,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:37,101 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) [2024-11-08 09:38:37,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 09:38:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 09:38:37,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 09:38:37,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 09:38:37,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452328497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:37,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:37,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-11-08 09:38:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701804809] [2024-11-08 09:38:37,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:37,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 09:38:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 09:38:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:38:37,360 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:37,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:37,560 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2024-11-08 09:38:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 09:38:37,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-08 09:38:37,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:37,564 INFO L225 Difference]: With dead ends: 187 [2024-11-08 09:38:37,565 INFO L226 Difference]: Without dead ends: 150 [2024-11-08 09:38:37,565 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:38:37,566 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 91 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:37,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 239 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-08 09:38:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2024-11-08 09:38:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2024-11-08 09:38:37,606 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2024-11-08 09:38:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:37,607 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2024-11-08 09:38:37,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2024-11-08 09:38:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-08 09:38:37,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:37,608 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:37,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 09:38:37,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:37,809 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:37,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:37,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2024-11-08 09:38:37,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:37,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146654694] [2024-11-08 09:38:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-11-08 09:38:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146654694] [2024-11-08 09:38:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146654694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:38:37,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:38:37,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:38:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700295595] [2024-11-08 09:38:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:38:37,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:38:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:38:37,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:37,960 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:37,980 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2024-11-08 09:38:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:38:37,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-08 09:38:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:37,981 INFO L225 Difference]: With dead ends: 94 [2024-11-08 09:38:37,982 INFO L226 Difference]: Without dead ends: 64 [2024-11-08 09:38:37,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:38:37,983 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:37,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 104 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:38:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-08 09:38:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-08 09:38:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-11-08 09:38:37,992 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2024-11-08 09:38:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:37,993 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-11-08 09:38:37,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-11-08 09:38:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 09:38:37,994 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:37,994 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:37,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 09:38:37,995 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:37,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1385301982, now seen corresponding path program 2 times [2024-11-08 09:38:37,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:37,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29310687] [2024-11-08 09:38:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:38:38,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29310687] [2024-11-08 09:38:38,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29310687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:38,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476556144] [2024-11-08 09:38:38,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:38:38,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:38,298 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) [2024-11-08 09:38:38,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 09:38:38,428 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:38:38,429 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:38,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:38:38,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:38:38,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:38:38,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476556144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:38,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:38,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-11-08 09:38:38,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294474512] [2024-11-08 09:38:38,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:38,758 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 09:38:38,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:38,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 09:38:38,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:38:38,760 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:39,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:39,036 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2024-11-08 09:38:39,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-08 09:38:39,038 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-08 09:38:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:39,041 INFO L225 Difference]: With dead ends: 261 [2024-11-08 09:38:39,042 INFO L226 Difference]: Without dead ends: 220 [2024-11-08 09:38:39,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:38:39,045 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 251 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:39,045 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 190 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2024-11-08 09:38:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 88. [2024-11-08 09:38:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2024-11-08 09:38:39,068 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2024-11-08 09:38:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:39,069 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2024-11-08 09:38:39,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2024-11-08 09:38:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-08 09:38:39,071 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:39,071 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:39,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 09:38:39,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:39,272 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:39,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash 359833914, now seen corresponding path program 3 times [2024-11-08 09:38:39,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:39,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804729340] [2024-11-08 09:38:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:39,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-08 09:38:39,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:39,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804729340] [2024-11-08 09:38:39,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804729340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:39,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369172802] [2024-11-08 09:38:39,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:38:39,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:39,949 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) [2024-11-08 09:38:39,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 09:38:40,072 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 09:38:40,073 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:40,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 09:38:40,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-11-08 09:38:40,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-11-08 09:38:40,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369172802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:40,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2024-11-08 09:38:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147730625] [2024-11-08 09:38:40,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:40,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-08 09:38:40,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-08 09:38:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-11-08 09:38:40,202 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:40,497 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2024-11-08 09:38:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 09:38:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2024-11-08 09:38:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:40,500 INFO L225 Difference]: With dead ends: 314 [2024-11-08 09:38:40,500 INFO L226 Difference]: Without dead ends: 273 [2024-11-08 09:38:40,501 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2024-11-08 09:38:40,502 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 330 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:40,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 278 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 09:38:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-08 09:38:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 134. [2024-11-08 09:38:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2024-11-08 09:38:40,516 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 78 [2024-11-08 09:38:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:40,516 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2024-11-08 09:38:40,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2024-11-08 09:38:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-08 09:38:40,518 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:40,518 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:40,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 09:38:40,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:40,723 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:40,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash 140841668, now seen corresponding path program 4 times [2024-11-08 09:38:40,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:40,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857816366] [2024-11-08 09:38:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:40,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-08 09:38:41,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:41,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857816366] [2024-11-08 09:38:41,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857816366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:41,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552813252] [2024-11-08 09:38:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:38:41,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:41,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:41,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:38:41,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 09:38:41,863 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:38:41,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:38:41,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 09:38:41,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:38:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-08 09:38:41,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:38:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-08 09:38:42,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552813252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:38:42,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:38:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2024-11-08 09:38:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110479321] [2024-11-08 09:38:42,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:38:42,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-08 09:38:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:38:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-08 09:38:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 09:38:42,842 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:38:43,430 INFO L93 Difference]: Finished difference Result 557 states and 709 transitions. [2024-11-08 09:38:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-08 09:38:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-11-08 09:38:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:38:43,433 INFO L225 Difference]: With dead ends: 557 [2024-11-08 09:38:43,433 INFO L226 Difference]: Without dead ends: 472 [2024-11-08 09:38:43,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2024-11-08 09:38:43,434 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 668 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 09:38:43,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 350 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 09:38:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2024-11-08 09:38:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 184. [2024-11-08 09:38:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 181 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 09:38:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2024-11-08 09:38:43,454 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 116 [2024-11-08 09:38:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:38:43,454 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2024-11-08 09:38:43,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:38:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2024-11-08 09:38:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-08 09:38:43,456 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:38:43,457 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:38:43,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 09:38:43,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:43,658 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:38:43,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:38:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2022982902, now seen corresponding path program 5 times [2024-11-08 09:38:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:38:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805431014] [2024-11-08 09:38:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:38:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:38:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:38:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-08 09:38:45,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:38:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805431014] [2024-11-08 09:38:45,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805431014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:38:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700464019] [2024-11-08 09:38:45,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:38:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:38:45,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:38:45,891 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 09:38:45,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process