./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:48:50,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:48:50,326 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:48:50,332 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:48:50,333 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:48:50,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:48:50,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:48:50,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:48:50,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:48:50,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:48:50,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:48:50,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:48:50,369 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:48:50,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:48:50,370 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:48:50,371 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:48:50,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:48:50,373 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:48:50,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:48:50,374 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:48:50,375 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:48:50,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:48:50,376 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:48:50,377 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:48:50,378 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:48:50,379 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:48:50,379 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:48:50,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:48:50,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:48:50,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:48:50,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:48:50,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:48:50,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:48:50,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:48:50,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:48:50,385 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:48:50,386 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:48:50,386 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:48:50,386 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:48:50,387 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 [2023-11-06 22:48:50,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:48:50,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:48:50,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:48:50,826 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:48:50,827 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:48:50,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-11-06 22:48:54,188 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:48:54,708 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:48:54,709 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2023-11-06 22:48:54,742 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/data/6ea0848fd/c1557c23acf1465a8f85844800bef9ef/FLAGb89e8b509 [2023-11-06 22:48:54,760 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/data/6ea0848fd/c1557c23acf1465a8f85844800bef9ef [2023-11-06 22:48:54,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:48:54,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:48:54,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:48:54,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:48:54,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:48:54,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:54" (1/1) ... [2023-11-06 22:48:54,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4072a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:54, skipping insertion in model container [2023-11-06 22:48:54,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:54" (1/1) ... [2023-11-06 22:48:54,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:48:55,716 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2023-11-06 22:48:55,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:48:55,798 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:48:56,140 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2023-11-06 22:48:56,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:48:56,190 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:48:56,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56 WrapperNode [2023-11-06 22:48:56,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:48:56,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:48:56,193 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:48:56,193 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:48:56,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,266 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,367 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-06 22:48:56,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:48:56,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:48:56,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:48:56,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:48:56,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,571 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,602 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,612 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,623 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:48:56,627 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:48:56,627 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:48:56,627 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:48:56,629 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (1/1) ... [2023-11-06 22:48:56,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:48:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:48:56,682 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:48:56,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:48:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:48:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:48:56,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:48:56,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:48:56,826 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:48:56,828 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:48:58,965 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:48:58,977 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:48:58,977 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:48:58,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:58 BoogieIcfgContainer [2023-11-06 22:48:58,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:48:58,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:48:58,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:48:58,986 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:48:58,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:54" (1/3) ... [2023-11-06 22:48:58,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdeeac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:58, skipping insertion in model container [2023-11-06 22:48:58,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:56" (2/3) ... [2023-11-06 22:48:58,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fdeeac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:48:58, skipping insertion in model container [2023-11-06 22:48:58,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:48:58" (3/3) ... [2023-11-06 22:48:58,990 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2023-11-06 22:48:59,011 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:48:59,011 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:48:59,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:48:59,082 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@231b3d85, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:48:59,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:48:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:48:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:48:59,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:48:59,107 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2023-11-06 22:48:59,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:48:59,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:48:59,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1366884082, now seen corresponding path program 1 times [2023-11-06 22:48:59,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:48:59,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614219330] [2023-11-06 22:48:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:48:59,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:48:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:00,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:00,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614219330] [2023-11-06 22:49:00,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614219330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:00,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38461263] [2023-11-06 22:49:00,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:00,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:00,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:00,157 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:01,796 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2023-11-06 22:49:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-11-06 22:49:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:01,820 INFO L225 Difference]: With dead ends: 829 [2023-11-06 22:49:01,820 INFO L226 Difference]: Without dead ends: 463 [2023-11-06 22:49:01,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:01,830 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 135 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:01,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:49:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-06 22:49:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2023-11-06 22:49:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2023-11-06 22:49:01,902 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 156 [2023-11-06 22:49:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:01,904 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2023-11-06 22:49:01,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:01,904 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2023-11-06 22:49:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-06 22:49:01,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:01,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:01,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:49:01,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:01,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:01,911 INFO L85 PathProgramCache]: Analyzing trace with hash 651571138, now seen corresponding path program 1 times [2023-11-06 22:49:01,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:01,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590367685] [2023-11-06 22:49:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:01,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:02,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:02,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590367685] [2023-11-06 22:49:02,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590367685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:02,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:02,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:02,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200008334] [2023-11-06 22:49:02,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:02,478 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:03,621 INFO L93 Difference]: Finished difference Result 1321 states and 2139 transitions. [2023-11-06 22:49:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2023-11-06 22:49:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:03,629 INFO L225 Difference]: With dead ends: 1321 [2023-11-06 22:49:03,629 INFO L226 Difference]: Without dead ends: 874 [2023-11-06 22:49:03,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:03,633 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:03,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 149 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:49:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2023-11-06 22:49:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 870. [2023-11-06 22:49:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2023-11-06 22:49:03,681 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 161 [2023-11-06 22:49:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:03,682 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2023-11-06 22:49:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2023-11-06 22:49:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-06 22:49:03,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:03,691 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:03,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:49:03,691 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:03,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash 230881053, now seen corresponding path program 1 times [2023-11-06 22:49:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605049155] [2023-11-06 22:49:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:03,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:04,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:04,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605049155] [2023-11-06 22:49:04,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605049155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:04,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326509106] [2023-11-06 22:49:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:04,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:04,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:04,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:04,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:49:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:04,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:49:04,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:04,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:49:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326509106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:04,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:04,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 22:49:04,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570270561] [2023-11-06 22:49:04,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:04,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:04,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:04,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:04,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:04,878 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:06,253 INFO L93 Difference]: Finished difference Result 2575 states and 3906 transitions. [2023-11-06 22:49:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-11-06 22:49:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:06,273 INFO L225 Difference]: With dead ends: 2575 [2023-11-06 22:49:06,274 INFO L226 Difference]: Without dead ends: 1707 [2023-11-06 22:49:06,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:06,278 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:06,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 176 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:49:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-11-06 22:49:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1700. [2023-11-06 22:49:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 1.4484991171277222) internal successors, (2461), 1699 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2461 transitions. [2023-11-06 22:49:06,387 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2461 transitions. Word has length 163 [2023-11-06 22:49:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:06,389 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2461 transitions. [2023-11-06 22:49:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2461 transitions. [2023-11-06 22:49:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-06 22:49:06,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:06,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:49:06,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:49:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:06,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:06,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash 134146819, now seen corresponding path program 1 times [2023-11-06 22:49:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:06,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547586544] [2023-11-06 22:49:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:49:07,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:07,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547586544] [2023-11-06 22:49:07,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547586544] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:07,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:07,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443212944] [2023-11-06 22:49:07,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:07,090 INFO L87 Difference]: Start difference. First operand 1700 states and 2461 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:08,403 INFO L93 Difference]: Finished difference Result 4226 states and 6097 transitions. [2023-11-06 22:49:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2023-11-06 22:49:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:08,422 INFO L225 Difference]: With dead ends: 4226 [2023-11-06 22:49:08,422 INFO L226 Difference]: Without dead ends: 2528 [2023-11-06 22:49:08,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:08,427 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:08,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:49:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2023-11-06 22:49:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2527. [2023-11-06 22:49:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 1.4180522565320666) internal successors, (3582), 2526 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 3582 transitions. [2023-11-06 22:49:08,513 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 3582 transitions. Word has length 173 [2023-11-06 22:49:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:08,513 INFO L495 AbstractCegarLoop]: Abstraction has 2527 states and 3582 transitions. [2023-11-06 22:49:08,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 3582 transitions. [2023-11-06 22:49:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-11-06 22:49:08,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:08,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 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, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:49:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:49:08,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:08,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -224481352, now seen corresponding path program 1 times [2023-11-06 22:49:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:08,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585180698] [2023-11-06 22:49:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:08,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:08,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:08,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585180698] [2023-11-06 22:49:08,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585180698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:08,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:08,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:49:08,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610948591] [2023-11-06 22:49:08,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:08,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:08,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:08,944 INFO L87 Difference]: Start difference. First operand 2527 states and 3582 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:10,171 INFO L93 Difference]: Finished difference Result 7492 states and 10627 transitions. [2023-11-06 22:49:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-11-06 22:49:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:10,203 INFO L225 Difference]: With dead ends: 7492 [2023-11-06 22:49:10,204 INFO L226 Difference]: Without dead ends: 4967 [2023-11-06 22:49:10,208 INFO L412 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 [2023-11-06 22:49:10,211 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 228 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:10,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 421 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:49:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2023-11-06 22:49:10,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4965. [2023-11-06 22:49:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.267324738114424) internal successors, (6291), 4964 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6291 transitions. [2023-11-06 22:49:10,358 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6291 transitions. Word has length 176 [2023-11-06 22:49:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:10,358 INFO L495 AbstractCegarLoop]: Abstraction has 4965 states and 6291 transitions. [2023-11-06 22:49:10,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6291 transitions. [2023-11-06 22:49:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-06 22:49:10,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:10,369 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 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, 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, 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, 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, 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, 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, 1, 1] [2023-11-06 22:49:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:49:10,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:10,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash 36301232, now seen corresponding path program 1 times [2023-11-06 22:49:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869199285] [2023-11-06 22:49:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:49:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869199285] [2023-11-06 22:49:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869199285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211481847] [2023-11-06 22:49:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:11,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:11,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:49:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:11,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:49:11,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:49:11,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:49:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211481847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:11,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:11,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 22:49:11,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069869786] [2023-11-06 22:49:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:11,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:11,610 INFO L87 Difference]: Start difference. First operand 4965 states and 6291 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:12,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:12,957 INFO L93 Difference]: Finished difference Result 14628 states and 18569 transitions. [2023-11-06 22:49:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2023-11-06 22:49:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:13,018 INFO L225 Difference]: With dead ends: 14628 [2023-11-06 22:49:13,019 INFO L226 Difference]: Without dead ends: 9665 [2023-11-06 22:49:13,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:13,032 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:13,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 179 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:49:13,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9665 states. [2023-11-06 22:49:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9665 to 9662. [2023-11-06 22:49:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 1.231860055894835) internal successors, (11901), 9661 states have internal predecessors, (11901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 11901 transitions. [2023-11-06 22:49:13,407 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 11901 transitions. Word has length 190 [2023-11-06 22:49:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:13,408 INFO L495 AbstractCegarLoop]: Abstraction has 9662 states and 11901 transitions. [2023-11-06 22:49:13,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 11901 transitions. [2023-11-06 22:49:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-06 22:49:13,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:13,433 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:13,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:13,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:13,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:13,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1225881526, now seen corresponding path program 1 times [2023-11-06 22:49:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:13,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165773946] [2023-11-06 22:49:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:13,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:14,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165773946] [2023-11-06 22:49:14,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165773946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:14,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850671512] [2023-11-06 22:49:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:14,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:14,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:14,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:14,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:49:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:14,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:49:14,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:14,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:49:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850671512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:14,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:14,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:49:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642861135] [2023-11-06 22:49:14,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:14,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:14,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:14,748 INFO L87 Difference]: Start difference. First operand 9662 states and 11901 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:16,118 INFO L93 Difference]: Finished difference Result 27274 states and 33746 transitions. [2023-11-06 22:49:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:16,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2023-11-06 22:49:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:16,214 INFO L225 Difference]: With dead ends: 27274 [2023-11-06 22:49:16,214 INFO L226 Difference]: Without dead ends: 17614 [2023-11-06 22:49:16,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:16,232 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 83 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:16,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 443 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:49:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17614 states. [2023-11-06 22:49:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17614 to 17579. [2023-11-06 22:49:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17579 states, 17578 states have (on average 1.2199340084196155) internal successors, (21444), 17578 states have internal predecessors, (21444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17579 states to 17579 states and 21444 transitions. [2023-11-06 22:49:16,784 INFO L78 Accepts]: Start accepts. Automaton has 17579 states and 21444 transitions. Word has length 194 [2023-11-06 22:49:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:16,784 INFO L495 AbstractCegarLoop]: Abstraction has 17579 states and 21444 transitions. [2023-11-06 22:49:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 17579 states and 21444 transitions. [2023-11-06 22:49:16,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-06 22:49:16,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:16,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:16,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:17,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:17,035 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:17,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:17,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1479704765, now seen corresponding path program 1 times [2023-11-06 22:49:17,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:17,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524389465] [2023-11-06 22:49:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:49:17,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:17,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524389465] [2023-11-06 22:49:17,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524389465] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:17,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169101243] [2023-11-06 22:49:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:17,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:17,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:17,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:17,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:49:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:17,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:49:17,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:49:18,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:49:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169101243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:18,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:49:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648835727] [2023-11-06 22:49:18,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:49:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:49:18,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:18,074 INFO L87 Difference]: Start difference. First operand 17579 states and 21444 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:19,800 INFO L93 Difference]: Finished difference Result 60850 states and 74308 transitions. [2023-11-06 22:49:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:49:19,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2023-11-06 22:49:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:19,905 INFO L225 Difference]: With dead ends: 60850 [2023-11-06 22:49:19,906 INFO L226 Difference]: Without dead ends: 43273 [2023-11-06 22:49:19,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:19,935 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 559 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:19,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 439 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:49:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43273 states. [2023-11-06 22:49:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43273 to 41842. [2023-11-06 22:49:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41842 states, 41841 states have (on average 1.211252121125212) internal successors, (50680), 41841 states have internal predecessors, (50680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:21,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41842 states to 41842 states and 50680 transitions. [2023-11-06 22:49:21,316 INFO L78 Accepts]: Start accepts. Automaton has 41842 states and 50680 transitions. Word has length 204 [2023-11-06 22:49:21,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:21,317 INFO L495 AbstractCegarLoop]: Abstraction has 41842 states and 50680 transitions. [2023-11-06 22:49:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:21,317 INFO L276 IsEmpty]: Start isEmpty. Operand 41842 states and 50680 transitions. [2023-11-06 22:49:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-06 22:49:21,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:21,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1] [2023-11-06 22:49:21,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:21,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:21,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:21,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:21,570 INFO L85 PathProgramCache]: Analyzing trace with hash -954878154, now seen corresponding path program 1 times [2023-11-06 22:49:21,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:21,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497432546] [2023-11-06 22:49:21,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:21,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:49:22,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:22,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497432546] [2023-11-06 22:49:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497432546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204485992] [2023-11-06 22:49:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:22,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:22,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:22,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:22,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:49:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:22,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:49:22,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:22,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:49:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204485992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:22,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:49:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:49:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438274661] [2023-11-06 22:49:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:22,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:22,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:22,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:22,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:22,866 INFO L87 Difference]: Start difference. First operand 41842 states and 50680 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:24,004 INFO L93 Difference]: Finished difference Result 83688 states and 101368 transitions. [2023-11-06 22:49:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2023-11-06 22:49:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:24,081 INFO L225 Difference]: With dead ends: 83688 [2023-11-06 22:49:24,081 INFO L226 Difference]: Without dead ends: 41848 [2023-11-06 22:49:24,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:49:24,119 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 122 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:24,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:49:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41848 states. [2023-11-06 22:49:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41848 to 41842. [2023-11-06 22:49:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41842 states, 41841 states have (on average 1.204990320499032) internal successors, (50418), 41841 states have internal predecessors, (50418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41842 states to 41842 states and 50418 transitions. [2023-11-06 22:49:25,185 INFO L78 Accepts]: Start accepts. Automaton has 41842 states and 50418 transitions. Word has length 204 [2023-11-06 22:49:25,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:25,186 INFO L495 AbstractCegarLoop]: Abstraction has 41842 states and 50418 transitions. [2023-11-06 22:49:25,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:25,186 INFO L276 IsEmpty]: Start isEmpty. Operand 41842 states and 50418 transitions. [2023-11-06 22:49:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 22:49:25,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:25,231 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:25,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:25,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:25,438 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:25,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash 288029418, now seen corresponding path program 1 times [2023-11-06 22:49:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:25,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542215129] [2023-11-06 22:49:25,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:25,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 22:49:26,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542215129] [2023-11-06 22:49:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542215129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:49:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162385233] [2023-11-06 22:49:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:26,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:49:26,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:49:26,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:49:26,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:49:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:26,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:49:26,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:49:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:26,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:49:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:26,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162385233] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:49:26,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:49:26,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-06 22:49:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866122618] [2023-11-06 22:49:26,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:49:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:49:26,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:49:26,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:49:26,806 INFO L87 Difference]: Start difference. First operand 41842 states and 50418 transitions. Second operand has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:32,298 INFO L93 Difference]: Finished difference Result 131242 states and 157949 transitions. [2023-11-06 22:49:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:49:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2023-11-06 22:49:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:32,405 INFO L225 Difference]: With dead ends: 131242 [2023-11-06 22:49:32,406 INFO L226 Difference]: Without dead ends: 89401 [2023-11-06 22:49:32,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:49:32,450 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 2810 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 734 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2810 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 4567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:32,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2810 Valid, 411 Invalid, 4567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 22:49:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2023-11-06 22:49:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 87300. [2023-11-06 22:49:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87300 states, 87299 states have (on average 1.1552022359935394) internal successors, (100848), 87299 states have internal predecessors, (100848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87300 states to 87300 states and 100848 transitions. [2023-11-06 22:49:34,362 INFO L78 Accepts]: Start accepts. Automaton has 87300 states and 100848 transitions. Word has length 207 [2023-11-06 22:49:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:34,362 INFO L495 AbstractCegarLoop]: Abstraction has 87300 states and 100848 transitions. [2023-11-06 22:49:34,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 87300 states and 100848 transitions. [2023-11-06 22:49:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-06 22:49:34,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:34,399 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:34,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:49:34,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_679905af-5c7c-4e10-bb06-e55f0e6e9622/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:49:34,607 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:34,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:34,608 INFO L85 PathProgramCache]: Analyzing trace with hash -874272386, now seen corresponding path program 1 times [2023-11-06 22:49:34,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:34,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837235483] [2023-11-06 22:49:34,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:34,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:49:35,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:35,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837235483] [2023-11-06 22:49:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837235483] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:35,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:35,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:49:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631911944] [2023-11-06 22:49:35,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:35,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:35,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:35,246 INFO L87 Difference]: Start difference. First operand 87300 states and 100848 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:36,814 INFO L93 Difference]: Finished difference Result 188238 states and 217751 transitions. [2023-11-06 22:49:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:36,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2023-11-06 22:49:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:36,969 INFO L225 Difference]: With dead ends: 188238 [2023-11-06 22:49:36,969 INFO L226 Difference]: Without dead ends: 100940 [2023-11-06 22:49:37,012 INFO L412 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 [2023-11-06 22:49:37,012 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 142 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:37,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 408 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:49:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100940 states. [2023-11-06 22:49:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100940 to 100922. [2023-11-06 22:49:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100922 states, 100921 states have (on average 1.1462530097799268) internal successors, (115681), 100921 states have internal predecessors, (115681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100922 states to 100922 states and 115681 transitions. [2023-11-06 22:49:38,904 INFO L78 Accepts]: Start accepts. Automaton has 100922 states and 115681 transitions. Word has length 249 [2023-11-06 22:49:38,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:38,904 INFO L495 AbstractCegarLoop]: Abstraction has 100922 states and 115681 transitions. [2023-11-06 22:49:38,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 100922 states and 115681 transitions. [2023-11-06 22:49:39,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-11-06 22:49:39,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:39,391 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:49:39,392 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:39,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:39,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2121214106, now seen corresponding path program 1 times [2023-11-06 22:49:39,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511572268] [2023-11-06 22:49:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-11-06 22:49:39,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:39,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511572268] [2023-11-06 22:49:39,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511572268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:39,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:39,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:39,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382212757] [2023-11-06 22:49:39,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:39,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:39,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:39,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:39,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:39,976 INFO L87 Difference]: Start difference. First operand 100922 states and 115681 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:41,798 INFO L93 Difference]: Finished difference Result 226702 states and 260308 transitions. [2023-11-06 22:49:41,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:41,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2023-11-06 22:49:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:41,944 INFO L225 Difference]: With dead ends: 226702 [2023-11-06 22:49:41,944 INFO L226 Difference]: Without dead ends: 125782 [2023-11-06 22:49:41,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:41,989 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:41,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 138 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:49:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125782 states. [2023-11-06 22:49:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125782 to 125753. [2023-11-06 22:49:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125753 states, 125752 states have (on average 1.141969909027292) internal successors, (143605), 125752 states have internal predecessors, (143605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125753 states to 125753 states and 143605 transitions. [2023-11-06 22:49:44,389 INFO L78 Accepts]: Start accepts. Automaton has 125753 states and 143605 transitions. Word has length 262 [2023-11-06 22:49:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 125753 states and 143605 transitions. [2023-11-06 22:49:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:44,390 INFO L276 IsEmpty]: Start isEmpty. Operand 125753 states and 143605 transitions. [2023-11-06 22:49:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-06 22:49:44,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:44,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:44,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:49:44,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:44,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:44,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1876449921, now seen corresponding path program 1 times [2023-11-06 22:49:44,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:44,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163685792] [2023-11-06 22:49:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2023-11-06 22:49:44,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:44,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163685792] [2023-11-06 22:49:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163685792] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:44,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:49:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583155574] [2023-11-06 22:49:44,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:49:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:44,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:49:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:44,881 INFO L87 Difference]: Start difference. First operand 125753 states and 143605 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:46,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:46,702 INFO L93 Difference]: Finished difference Result 288446 states and 332227 transitions. [2023-11-06 22:49:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:49:46,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2023-11-06 22:49:46,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:46,882 INFO L225 Difference]: With dead ends: 288446 [2023-11-06 22:49:46,882 INFO L226 Difference]: Without dead ends: 163304 [2023-11-06 22:49:46,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:49:46,936 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 154 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:46,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 201 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:49:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163304 states. [2023-11-06 22:49:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163304 to 163304. [2023-11-06 22:49:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163304 states, 163303 states have (on average 1.1156745436397373) internal successors, (182193), 163303 states have internal predecessors, (182193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163304 states to 163304 states and 182193 transitions. [2023-11-06 22:49:50,152 INFO L78 Accepts]: Start accepts. Automaton has 163304 states and 182193 transitions. Word has length 270 [2023-11-06 22:49:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:49:50,152 INFO L495 AbstractCegarLoop]: Abstraction has 163304 states and 182193 transitions. [2023-11-06 22:49:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 163304 states and 182193 transitions. [2023-11-06 22:49:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-06 22:49:50,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:49:50,181 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:49:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:49:50,182 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:49:50,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:49:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash 691194018, now seen corresponding path program 1 times [2023-11-06 22:49:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:49:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671419275] [2023-11-06 22:49:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:49:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:49:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:49:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2023-11-06 22:49:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:49:50,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671419275] [2023-11-06 22:49:50,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671419275] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:49:50,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:49:50,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:49:50,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270674366] [2023-11-06 22:49:50,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:49:50,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:49:50,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:49:50,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:49:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:49:50,516 INFO L87 Difference]: Start difference. First operand 163304 states and 182193 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:49:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:49:54,030 INFO L93 Difference]: Finished difference Result 488504 states and 545339 transitions. [2023-11-06 22:49:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:49:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2023-11-06 22:49:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:49:54,492 INFO L225 Difference]: With dead ends: 488504 [2023-11-06 22:49:54,493 INFO L226 Difference]: Without dead ends: 325811 [2023-11-06 22:49:54,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:49:54,576 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 809 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:49:54,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 385 Invalid, 818 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [107 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:49:54,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325811 states. [2023-11-06 22:49:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325811 to 325791. [2023-11-06 22:49:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325791 states, 325790 states have (on average 1.1155069216366371) internal successors, (363421), 325790 states have internal predecessors, (363421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325791 states to 325791 states and 363421 transitions. [2023-11-06 22:50:01,219 INFO L78 Accepts]: Start accepts. Automaton has 325791 states and 363421 transitions. Word has length 271 [2023-11-06 22:50:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:50:01,220 INFO L495 AbstractCegarLoop]: Abstraction has 325791 states and 363421 transitions. [2023-11-06 22:50:01,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:01,220 INFO L276 IsEmpty]: Start isEmpty. Operand 325791 states and 363421 transitions. [2023-11-06 22:50:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-06 22:50:01,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:50:01,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:50:01,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:50:01,276 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:50:01,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:50:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash 863852814, now seen corresponding path program 1 times [2023-11-06 22:50:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:50:01,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155092357] [2023-11-06 22:50:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:50:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:50:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:50:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-06 22:50:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:50:01,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155092357] [2023-11-06 22:50:01,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155092357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:50:01,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:50:01,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:50:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091112060] [2023-11-06 22:50:01,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:50:01,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:50:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:50:01,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:50:01,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:50:01,980 INFO L87 Difference]: Start difference. First operand 325791 states and 363421 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:50:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:50:05,959 INFO L93 Difference]: Finished difference Result 730811 states and 816541 transitions. [2023-11-06 22:50:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:50:05,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2023-11-06 22:50:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:50:06,546 INFO L225 Difference]: With dead ends: 730811 [2023-11-06 22:50:06,546 INFO L226 Difference]: Without dead ends: 405631 [2023-11-06 22:50:06,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:50:06,656 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:50:06,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 208 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:50:07,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405631 states.