./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/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_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/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_a835813c-9686-4b48-aad1-bfaf3fcfae51/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 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:25:39,564 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:25:39,714 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:25:39,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:25:39,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:25:39,777 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:25:39,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:25:39,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:25:39,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:25:39,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:25:39,789 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:25:39,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:25:39,790 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:25:39,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:25:39,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:25:39,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:25:39,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:25:39,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:25:39,796 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:25:39,796 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:25:39,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:25:39,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:25:39,798 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:25:39,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:25:39,799 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:25:39,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:25:39,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:25:39,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:25:39,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:39,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:25:39,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:25:39,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:25:39,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:25:39,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:25:39,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:25:39,807 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:25:39,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:25:39,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:25:39,808 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:25:39,808 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_a835813c-9686-4b48-aad1-bfaf3fcfae51/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62e9241ba979767c8bca2756b2edfc882f7b20aa81fc6f783856c8cd54d80552 [2023-11-06 22:25:40,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:25:40,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:25:40,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:25:40,225 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:25:40,225 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:25:40,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-11-06 22:25:43,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:25:44,354 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:25:44,355 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-11-06 22:25:44,384 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/data/d0076d93f/b42262db77774a0d8c0bc21ca518e2ad/FLAGde334d85b [2023-11-06 22:25:44,403 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/data/d0076d93f/b42262db77774a0d8c0bc21ca518e2ad [2023-11-06 22:25:44,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:25:44,412 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:25:44,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:44,417 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:25:44,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:25:44,425 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:44" (1/1) ... [2023-11-06 22:25:44,426 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28d2f7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:44, skipping insertion in model container [2023-11-06 22:25:44,427 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:25:44" (1/1) ... [2023-11-06 22:25:44,545 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:25:45,314 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_a835813c-9686-4b48-aad1-bfaf3fcfae51/sv-benchmarks/c/eca-rers2012/Problem03_label36.c[58393,58406] [2023-11-06 22:25:45,362 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:45,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:25:45,720 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_a835813c-9686-4b48-aad1-bfaf3fcfae51/sv-benchmarks/c/eca-rers2012/Problem03_label36.c[58393,58406] [2023-11-06 22:25:45,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:25:45,760 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:25:45,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45 WrapperNode [2023-11-06 22:25:45,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:25:45,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:45,763 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:25:45,763 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:25:45,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,836 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,942 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-06 22:25:45,943 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:25:45,944 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:25:45,944 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:25:45,944 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:25:45,965 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,977 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:45,977 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,048 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,073 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,104 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:25:46,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:25:46,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:25:46,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:25:46,125 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (1/1) ... [2023-11-06 22:25:46,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:25:46,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:25:46,164 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:25:46,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:25:46,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:25:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:25:46,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:25:46,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:25:46,355 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:25:46,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:25:48,820 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:25:48,843 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:25:48,844 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:25:48,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:48 BoogieIcfgContainer [2023-11-06 22:25:48,849 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:25:48,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:25:48,853 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:25:48,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:25:48,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:25:44" (1/3) ... [2023-11-06 22:25:48,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce47b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:48, skipping insertion in model container [2023-11-06 22:25:48,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:25:45" (2/3) ... [2023-11-06 22:25:48,864 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ce47b20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:25:48, skipping insertion in model container [2023-11-06 22:25:48,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:25:48" (3/3) ... [2023-11-06 22:25:48,866 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label36.c [2023-11-06 22:25:48,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:25:48,892 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:25:48,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:25:49,007 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;@4900b647, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:25:49,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:25:49,019 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 22:25:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-06 22:25:49,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:49,051 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, 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 22:25:49,052 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:49,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -946453597, now seen corresponding path program 1 times [2023-11-06 22:25:49,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826335113] [2023-11-06 22:25:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:50,363 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 22:25:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:50,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826335113] [2023-11-06 22:25:50,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826335113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:50,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:50,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679842417] [2023-11-06 22:25:50,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:50,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:50,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:50,428 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 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 22:25:52,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:52,056 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2023-11-06 22:25:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:52,058 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 179 [2023-11-06 22:25:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:52,078 INFO L225 Difference]: With dead ends: 857 [2023-11-06 22:25:52,078 INFO L226 Difference]: Without dead ends: 462 [2023-11-06 22:25:52,084 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 22:25:52,089 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 109 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:52,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 22:25:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-06 22:25:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2023-11-06 22:25:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 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 22:25:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2023-11-06 22:25:52,236 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 179 [2023-11-06 22:25:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:52,241 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2023-11-06 22:25:52,242 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 22:25:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2023-11-06 22:25:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-06 22:25:52,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:52,260 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:25:52,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:25:52,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:52,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:52,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1056624732, now seen corresponding path program 1 times [2023-11-06 22:25:52,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:52,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588901630] [2023-11-06 22:25:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:52,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:52,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:52,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588901630] [2023-11-06 22:25:52,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588901630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:52,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470763505] [2023-11-06 22:25:52,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:52,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:52,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:52,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:52,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:52,786 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 22:25:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:54,062 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2023-11-06 22:25:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:54,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 187 [2023-11-06 22:25:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:54,076 INFO L225 Difference]: With dead ends: 1344 [2023-11-06 22:25:54,077 INFO L226 Difference]: Without dead ends: 886 [2023-11-06 22:25:54,080 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 22:25:54,082 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:54,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:25:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-06 22:25:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2023-11-06 22:25:54,127 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 22:25:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2023-11-06 22:25:54,133 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 187 [2023-11-06 22:25:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:54,133 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2023-11-06 22:25:54,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 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 22:25:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2023-11-06 22:25:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-06 22:25:54,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:54,139 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:25:54,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:25:54,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:54,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:54,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1503064601, now seen corresponding path program 1 times [2023-11-06 22:25:54,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:54,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918806170] [2023-11-06 22:25:54,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:54,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:25:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918806170] [2023-11-06 22:25:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918806170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:55,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:55,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:25:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937517001] [2023-11-06 22:25:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:55,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:25:55,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:55,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:25:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:25:55,289 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 47.25) 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 22:25:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:56,641 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2023-11-06 22:25:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:25:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) 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 22:25:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:56,649 INFO L225 Difference]: With dead ends: 1884 [2023-11-06 22:25:56,649 INFO L226 Difference]: Without dead ends: 842 [2023-11-06 22:25:56,656 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 22:25:56,660 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 330 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:56,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:25:56,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2023-11-06 22:25:56,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2023-11-06 22:25:56,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 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 22:25:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2023-11-06 22:25:56,699 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 194 [2023-11-06 22:25:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:56,703 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2023-11-06 22:25:56,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) 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 22:25:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2023-11-06 22:25:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-06 22:25:56,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:56,710 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 22:25:56,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:25:56,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:56,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1846501408, now seen corresponding path program 1 times [2023-11-06 22:25:56,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:56,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764447779] [2023-11-06 22:25:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:56,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:57,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:57,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764447779] [2023-11-06 22:25:57,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764447779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:57,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:57,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971514903] [2023-11-06 22:25:57,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:57,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:57,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:57,403 INFO L87 Difference]: Start difference. First operand 842 states and 1148 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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 22:25:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:58,381 INFO L93 Difference]: Finished difference Result 2507 states and 3424 transitions. [2023-11-06 22:25:58,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:58,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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 202 [2023-11-06 22:25:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:58,394 INFO L225 Difference]: With dead ends: 2507 [2023-11-06 22:25:58,395 INFO L226 Difference]: Without dead ends: 1667 [2023-11-06 22:25:58,397 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 22:25:58,409 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:25:58,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:25:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2023-11-06 22:25:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1658. [2023-11-06 22:25:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.3566686783343391) internal successors, (2248), 1657 states have internal predecessors, (2248), 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 22:25:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2248 transitions. [2023-11-06 22:25:58,497 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2248 transitions. Word has length 202 [2023-11-06 22:25:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:25:58,497 INFO L495 AbstractCegarLoop]: Abstraction has 1658 states and 2248 transitions. [2023-11-06 22:25:58,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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 22:25:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2248 transitions. [2023-11-06 22:25:58,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-06 22:25:58,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:25:58,506 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 22:25:58,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:25:58,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:25:58,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:25:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -778094728, now seen corresponding path program 1 times [2023-11-06 22:25:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:25:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134661242] [2023-11-06 22:25:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:25:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:25:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:25:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:25:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:25:58,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134661242] [2023-11-06 22:25:58,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134661242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:25:58,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:25:58,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:25:58,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624729210] [2023-11-06 22:25:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:25:58,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:25:58,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:25:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:25:58,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:25:58,956 INFO L87 Difference]: Start difference. First operand 1658 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 22:25:59,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:25:59,975 INFO L93 Difference]: Finished difference Result 4952 states and 6720 transitions. [2023-11-06 22:25:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:25:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 205 [2023-11-06 22:25:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:25:59,997 INFO L225 Difference]: With dead ends: 4952 [2023-11-06 22:25:59,997 INFO L226 Difference]: Without dead ends: 3296 [2023-11-06 22:26:00,000 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 22:26:00,001 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 205 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:00,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 120 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:26:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2023-11-06 22:26:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3288. [2023-11-06 22:26:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 1.3428658351080012) internal successors, (4414), 3287 states have internal predecessors, (4414), 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 22:26:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 4414 transitions. [2023-11-06 22:26:00,114 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 4414 transitions. Word has length 205 [2023-11-06 22:26:00,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:00,114 INFO L495 AbstractCegarLoop]: Abstraction has 3288 states and 4414 transitions. [2023-11-06 22:26:00,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 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 22:26:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 4414 transitions. [2023-11-06 22:26:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2023-11-06 22:26:00,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:00,125 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:00,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:26:00,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:00,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 315085437, now seen corresponding path program 1 times [2023-11-06 22:26:00,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:00,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957944808] [2023-11-06 22:26:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:00,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:00,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:00,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957944808] [2023-11-06 22:26:00,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957944808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:00,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:00,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:00,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186068430] [2023-11-06 22:26:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:00,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:00,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:00,729 INFO L87 Difference]: Start difference. First operand 3288 states and 4414 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 22:26:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:01,902 INFO L93 Difference]: Finished difference Result 9841 states and 13219 transitions. [2023-11-06 22:26:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 22:26:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:01,947 INFO L225 Difference]: With dead ends: 9841 [2023-11-06 22:26:01,947 INFO L226 Difference]: Without dead ends: 6555 [2023-11-06 22:26:01,953 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 22:26:01,954 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:01,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 98 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:26:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6555 states. [2023-11-06 22:26:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6555 to 6544. [2023-11-06 22:26:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6544 states, 6543 states have (on average 1.3201895155127616) internal successors, (8638), 6543 states have internal predecessors, (8638), 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 22:26:02,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6544 states to 6544 states and 8638 transitions. [2023-11-06 22:26:02,308 INFO L78 Accepts]: Start accepts. Automaton has 6544 states and 8638 transitions. Word has length 207 [2023-11-06 22:26:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:02,310 INFO L495 AbstractCegarLoop]: Abstraction has 6544 states and 8638 transitions. [2023-11-06 22:26:02,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 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 22:26:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6544 states and 8638 transitions. [2023-11-06 22:26:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-06 22:26:02,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:02,339 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:02,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:26:02,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:02,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1170665858, now seen corresponding path program 1 times [2023-11-06 22:26:02,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:02,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613473677] [2023-11-06 22:26:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:02,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:02,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:02,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613473677] [2023-11-06 22:26:02,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613473677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:02,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:02,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:02,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495627069] [2023-11-06 22:26:02,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:02,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:02,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:02,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:02,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:02,974 INFO L87 Difference]: Start difference. First operand 6544 states and 8638 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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 22:26:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:04,152 INFO L93 Difference]: Finished difference Result 18800 states and 24832 transitions. [2023-11-06 22:26:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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 209 [2023-11-06 22:26:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:04,261 INFO L225 Difference]: With dead ends: 18800 [2023-11-06 22:26:04,261 INFO L226 Difference]: Without dead ends: 12258 [2023-11-06 22:26:04,272 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 22:26:04,273 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 200 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:04,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 112 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:26:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2023-11-06 22:26:04,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 12248. [2023-11-06 22:26:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12248 states, 12247 states have (on average 1.315750796113334) internal successors, (16114), 12247 states have internal predecessors, (16114), 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 22:26:04,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12248 states to 12248 states and 16114 transitions. [2023-11-06 22:26:04,691 INFO L78 Accepts]: Start accepts. Automaton has 12248 states and 16114 transitions. Word has length 209 [2023-11-06 22:26:04,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:04,691 INFO L495 AbstractCegarLoop]: Abstraction has 12248 states and 16114 transitions. [2023-11-06 22:26:04,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 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 22:26:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12248 states and 16114 transitions. [2023-11-06 22:26:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-11-06 22:26:04,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:04,713 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:04,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:26:04,714 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:04,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1948273350, now seen corresponding path program 1 times [2023-11-06 22:26:04,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:04,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019108889] [2023-11-06 22:26:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:05,195 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-06 22:26:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019108889] [2023-11-06 22:26:05,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019108889] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844706477] [2023-11-06 22:26:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:05,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:05,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:05,199 INFO L87 Difference]: Start difference. First operand 12248 states and 16114 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 22:26:06,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:06,588 INFO L93 Difference]: Finished difference Result 30595 states and 40159 transitions. [2023-11-06 22:26:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:06,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 212 [2023-11-06 22:26:06,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:06,635 INFO L225 Difference]: With dead ends: 30595 [2023-11-06 22:26:06,635 INFO L226 Difference]: Without dead ends: 18349 [2023-11-06 22:26:06,654 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 22:26:06,656 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 224 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:06,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 58 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:26:06,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18349 states. [2023-11-06 22:26:07,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 18348. [2023-11-06 22:26:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18348 states, 18347 states have (on average 1.3007576170491089) internal successors, (23865), 18347 states have internal predecessors, (23865), 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 22:26:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18348 states to 18348 states and 23865 transitions. [2023-11-06 22:26:07,139 INFO L78 Accepts]: Start accepts. Automaton has 18348 states and 23865 transitions. Word has length 212 [2023-11-06 22:26:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:07,139 INFO L495 AbstractCegarLoop]: Abstraction has 18348 states and 23865 transitions. [2023-11-06 22:26:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 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 22:26:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18348 states and 23865 transitions. [2023-11-06 22:26:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-06 22:26:07,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:07,168 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:07,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:26:07,168 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:07,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:07,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1194849960, now seen corresponding path program 1 times [2023-11-06 22:26:07,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:07,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498447841] [2023-11-06 22:26:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:07,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:07,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:07,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498447841] [2023-11-06 22:26:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498447841] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:07,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:07,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860018143] [2023-11-06 22:26:07,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:07,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:07,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:07,827 INFO L87 Difference]: Start difference. First operand 18348 states and 23865 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 22:26:09,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:09,194 INFO L93 Difference]: Finished difference Result 41170 states and 53663 transitions. [2023-11-06 22:26:09,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:09,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 216 [2023-11-06 22:26:09,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:09,248 INFO L225 Difference]: With dead ends: 41170 [2023-11-06 22:26:09,249 INFO L226 Difference]: Without dead ends: 22824 [2023-11-06 22:26:09,273 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 22:26:09,276 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 209 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:09,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 325 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:26:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22824 states. [2023-11-06 22:26:09,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22824 to 22821. [2023-11-06 22:26:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22821 states, 22820 states have (on average 1.2676161262050833) internal successors, (28927), 22820 states have internal predecessors, (28927), 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 22:26:09,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22821 states to 22821 states and 28927 transitions. [2023-11-06 22:26:09,875 INFO L78 Accepts]: Start accepts. Automaton has 22821 states and 28927 transitions. Word has length 216 [2023-11-06 22:26:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:09,877 INFO L495 AbstractCegarLoop]: Abstraction has 22821 states and 28927 transitions. [2023-11-06 22:26:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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 22:26:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22821 states and 28927 transitions. [2023-11-06 22:26:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-06 22:26:09,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:09,916 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:09,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:26:09,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:09,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2096332885, now seen corresponding path program 1 times [2023-11-06 22:26:09,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:09,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196070563] [2023-11-06 22:26:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:09,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:26:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:10,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196070563] [2023-11-06 22:26:10,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196070563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:10,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:10,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:10,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784950518] [2023-11-06 22:26:10,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:10,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:10,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:10,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:10,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:10,592 INFO L87 Difference]: Start difference. First operand 22821 states and 28927 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 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 22:26:11,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:11,902 INFO L93 Difference]: Finished difference Result 52760 states and 66812 transitions. [2023-11-06 22:26:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 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 224 [2023-11-06 22:26:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:11,985 INFO L225 Difference]: With dead ends: 52760 [2023-11-06 22:26:11,986 INFO L226 Difference]: Without dead ends: 29941 [2023-11-06 22:26:12,018 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 22:26:12,019 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 199 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:12,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 110 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:26:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29941 states. [2023-11-06 22:26:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29941 to 29926. [2023-11-06 22:26:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29926 states, 29925 states have (on average 1.2474185463659149) internal successors, (37329), 29925 states have internal predecessors, (37329), 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 22:26:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29926 states to 29926 states and 37329 transitions. [2023-11-06 22:26:12,705 INFO L78 Accepts]: Start accepts. Automaton has 29926 states and 37329 transitions. Word has length 224 [2023-11-06 22:26:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:12,705 INFO L495 AbstractCegarLoop]: Abstraction has 29926 states and 37329 transitions. [2023-11-06 22:26:12,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 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 22:26:12,706 INFO L276 IsEmpty]: Start isEmpty. Operand 29926 states and 37329 transitions. [2023-11-06 22:26:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-06 22:26:12,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:12,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:12,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:26:12,755 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:12,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1232235946, now seen corresponding path program 1 times [2023-11-06 22:26:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987284447] [2023-11-06 22:26:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:12,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:26:13,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987284447] [2023-11-06 22:26:13,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987284447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:13,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279773000] [2023-11-06 22:26:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:13,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:13,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:13,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:26:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:14,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:14,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-06 22:26:14,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:14,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279773000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:14,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:14,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 22:26:14,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532000264] [2023-11-06 22:26:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:14,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:14,234 INFO L87 Difference]: Start difference. First operand 29926 states and 37329 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 22:26:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:15,812 INFO L93 Difference]: Finished difference Result 78563 states and 98243 transitions. [2023-11-06 22:26:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 231 [2023-11-06 22:26:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:15,919 INFO L225 Difference]: With dead ends: 78563 [2023-11-06 22:26:15,919 INFO L226 Difference]: Without dead ends: 48842 [2023-11-06 22:26:15,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 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 22:26:15,949 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 221 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 87 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:26:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48842 states. [2023-11-06 22:26:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48842 to 48840. [2023-11-06 22:26:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48840 states, 48839 states have (on average 1.233522389893323) internal successors, (60244), 48839 states have internal predecessors, (60244), 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 22:26:17,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48840 states to 48840 states and 60244 transitions. [2023-11-06 22:26:17,295 INFO L78 Accepts]: Start accepts. Automaton has 48840 states and 60244 transitions. Word has length 231 [2023-11-06 22:26:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:17,295 INFO L495 AbstractCegarLoop]: Abstraction has 48840 states and 60244 transitions. [2023-11-06 22:26:17,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 22:26:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 48840 states and 60244 transitions. [2023-11-06 22:26:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-06 22:26:17,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:17,339 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:17,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:17,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:17,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:17,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 397552662, now seen corresponding path program 1 times [2023-11-06 22:26:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478892730] [2023-11-06 22:26:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-06 22:26:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:18,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478892730] [2023-11-06 22:26:18,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478892730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:18,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56150578] [2023-11-06 22:26:18,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:18,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:18,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:18,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:26:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:19,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:19,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-06 22:26:19,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:19,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56150578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:19,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:19,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 22:26:19,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770193058] [2023-11-06 22:26:19,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:19,131 INFO L87 Difference]: Start difference. First operand 48840 states and 60244 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 22:26:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:20,696 INFO L93 Difference]: Finished difference Result 109452 states and 135875 transitions. [2023-11-06 22:26:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 246 [2023-11-06 22:26:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:20,823 INFO L225 Difference]: With dead ends: 109452 [2023-11-06 22:26:20,824 INFO L226 Difference]: Without dead ends: 60817 [2023-11-06 22:26:20,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 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 22:26:20,863 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 203 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:20,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 113 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:26:21,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60817 states. [2023-11-06 22:26:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60817 to 60407. [2023-11-06 22:26:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60407 states, 60406 states have (on average 1.147915769956627) internal successors, (69341), 60406 states have internal predecessors, (69341), 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 22:26:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60407 states to 60407 states and 69341 transitions. [2023-11-06 22:26:22,249 INFO L78 Accepts]: Start accepts. Automaton has 60407 states and 69341 transitions. Word has length 246 [2023-11-06 22:26:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:22,250 INFO L495 AbstractCegarLoop]: Abstraction has 60407 states and 69341 transitions. [2023-11-06 22:26:22,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 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 22:26:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 60407 states and 69341 transitions. [2023-11-06 22:26:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-06 22:26:22,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:22,295 INFO L195 NwaCegarLoop]: trace histogram [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, 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 22:26:22,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:22,503 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:22,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -636127658, now seen corresponding path program 1 times [2023-11-06 22:26:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:22,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005810404] [2023-11-06 22:26:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:22,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-11-06 22:26:23,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:23,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005810404] [2023-11-06 22:26:23,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005810404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:23,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:23,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56239585] [2023-11-06 22:26:23,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:23,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:26:23,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:26:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:26:23,323 INFO L87 Difference]: Start difference. First operand 60407 states and 69341 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 22:26:25,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:25,423 INFO L93 Difference]: Finished difference Result 178506 states and 204855 transitions. [2023-11-06 22:26:25,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:26:25,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 261 [2023-11-06 22:26:25,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:25,659 INFO L225 Difference]: With dead ends: 178506 [2023-11-06 22:26:25,660 INFO L226 Difference]: Without dead ends: 118710 [2023-11-06 22:26:25,718 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 22:26:25,720 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 703 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:25,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 301 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:26:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118710 states. [2023-11-06 22:26:27,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118710 to 98981. [2023-11-06 22:26:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98981 states, 98980 states have (on average 1.1429682764194786) internal successors, (113131), 98980 states have internal predecessors, (113131), 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 22:26:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98981 states to 98981 states and 113131 transitions. [2023-11-06 22:26:28,164 INFO L78 Accepts]: Start accepts. Automaton has 98981 states and 113131 transitions. Word has length 261 [2023-11-06 22:26:28,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:28,164 INFO L495 AbstractCegarLoop]: Abstraction has 98981 states and 113131 transitions. [2023-11-06 22:26:28,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 3 states have internal predecessors, (221), 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 22:26:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 98981 states and 113131 transitions. [2023-11-06 22:26:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-11-06 22:26:28,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:28,217 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 22:26:28,218 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:28,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash 949138708, now seen corresponding path program 1 times [2023-11-06 22:26:28,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:28,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376005055] [2023-11-06 22:26:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:26:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376005055] [2023-11-06 22:26:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376005055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140512468] [2023-11-06 22:26:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:28,598 INFO L87 Difference]: Start difference. First operand 98981 states and 113131 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 22:26:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:30,725 INFO L93 Difference]: Finished difference Result 176015 states and 200495 transitions. [2023-11-06 22:26:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 287 [2023-11-06 22:26:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:30,858 INFO L225 Difference]: With dead ends: 176015 [2023-11-06 22:26:30,858 INFO L226 Difference]: Without dead ends: 77645 [2023-11-06 22:26:30,921 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 22:26:30,922 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 212 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:30,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 297 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:26:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77645 states. [2023-11-06 22:26:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77645 to 72362. [2023-11-06 22:26:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72362 states, 72361 states have (on average 1.1038957449454816) internal successors, (79879), 72361 states have internal predecessors, (79879), 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 22:26:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72362 states to 72362 states and 79879 transitions. [2023-11-06 22:26:32,365 INFO L78 Accepts]: Start accepts. Automaton has 72362 states and 79879 transitions. Word has length 287 [2023-11-06 22:26:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:32,365 INFO L495 AbstractCegarLoop]: Abstraction has 72362 states and 79879 transitions. [2023-11-06 22:26:32,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 22:26:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 72362 states and 79879 transitions. [2023-11-06 22:26:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2023-11-06 22:26:32,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:32,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-06 22:26:32,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:26:32,398 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:32,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:32,398 INFO L85 PathProgramCache]: Analyzing trace with hash 889240866, now seen corresponding path program 1 times [2023-11-06 22:26:32,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366241145] [2023-11-06 22:26:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:32,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 121 proven. 6 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 22:26:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:33,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366241145] [2023-11-06 22:26:33,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366241145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:33,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583951187] [2023-11-06 22:26:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:33,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:33,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:33,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:26:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:33,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2023-11-06 22:26:34,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:34,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583951187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:34,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:34,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:26:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008458868] [2023-11-06 22:26:34,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:34,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:34,269 INFO L87 Difference]: Start difference. First operand 72362 states and 79879 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 22:26:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:35,809 INFO L93 Difference]: Finished difference Result 158125 states and 173996 transitions. [2023-11-06 22:26:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:35,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 289 [2023-11-06 22:26:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:35,901 INFO L225 Difference]: With dead ends: 158125 [2023-11-06 22:26:35,901 INFO L226 Difference]: Without dead ends: 86374 [2023-11-06 22:26:35,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 288 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 22:26:35,933 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 39 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:35,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 346 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:26:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86374 states. [2023-11-06 22:26:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86374 to 74798. [2023-11-06 22:26:37,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74798 states, 74797 states have (on average 1.0992419482064788) internal successors, (82220), 74797 states have internal predecessors, (82220), 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 22:26:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74798 states to 74798 states and 82220 transitions. [2023-11-06 22:26:37,481 INFO L78 Accepts]: Start accepts. Automaton has 74798 states and 82220 transitions. Word has length 289 [2023-11-06 22:26:37,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:37,482 INFO L495 AbstractCegarLoop]: Abstraction has 74798 states and 82220 transitions. [2023-11-06 22:26:37,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 22:26:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 74798 states and 82220 transitions. [2023-11-06 22:26:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-06 22:26:37,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:37,531 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:37,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:37,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:37,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:37,733 INFO L85 PathProgramCache]: Analyzing trace with hash -873092992, now seen corresponding path program 1 times [2023-11-06 22:26:37,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:37,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388481022] [2023-11-06 22:26:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:37,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:38,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:38,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388481022] [2023-11-06 22:26:38,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388481022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:38,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:38,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:26:38,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700814344] [2023-11-06 22:26:38,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:38,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:38,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:38,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:38,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:38,762 INFO L87 Difference]: Start difference. First operand 74798 states and 82220 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 22:26:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:40,306 INFO L93 Difference]: Finished difference Result 150205 states and 165062 transitions. [2023-11-06 22:26:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 294 [2023-11-06 22:26:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:40,385 INFO L225 Difference]: With dead ends: 150205 [2023-11-06 22:26:40,385 INFO L226 Difference]: Without dead ends: 76426 [2023-11-06 22:26:40,801 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 22:26:40,802 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 177 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:40,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 328 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:26:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76426 states. [2023-11-06 22:26:41,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76426 to 73785. [2023-11-06 22:26:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73785 states, 73784 states have (on average 1.0886099967472622) internal successors, (80322), 73784 states have internal predecessors, (80322), 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 22:26:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73785 states to 73785 states and 80322 transitions. [2023-11-06 22:26:42,001 INFO L78 Accepts]: Start accepts. Automaton has 73785 states and 80322 transitions. Word has length 294 [2023-11-06 22:26:42,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:42,001 INFO L495 AbstractCegarLoop]: Abstraction has 73785 states and 80322 transitions. [2023-11-06 22:26:42,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 22:26:42,002 INFO L276 IsEmpty]: Start isEmpty. Operand 73785 states and 80322 transitions. [2023-11-06 22:26:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-11-06 22:26:42,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:42,033 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2023-11-06 22:26:42,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 22:26:42,033 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:42,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:42,034 INFO L85 PathProgramCache]: Analyzing trace with hash -655906769, now seen corresponding path program 2 times [2023-11-06 22:26:42,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:42,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757649650] [2023-11-06 22:26:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:42,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 134 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-06 22:26:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:43,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757649650] [2023-11-06 22:26:43,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757649650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518509367] [2023-11-06 22:26:43,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:43,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:43,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:26:43,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:43,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:43,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-11-06 22:26:43,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:43,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518509367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:43,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:43,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:26:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765798325] [2023-11-06 22:26:43,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:43,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:43,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:43,805 INFO L87 Difference]: Start difference. First operand 73785 states and 80322 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 22:26:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:45,343 INFO L93 Difference]: Finished difference Result 144541 states and 157294 transitions. [2023-11-06 22:26:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 302 [2023-11-06 22:26:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:45,428 INFO L225 Difference]: With dead ends: 144541 [2023-11-06 22:26:45,428 INFO L226 Difference]: Without dead ends: 70961 [2023-11-06 22:26:45,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 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 22:26:45,467 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:45,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 325 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:26:45,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70961 states. [2023-11-06 22:26:46,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70961 to 70131. [2023-11-06 22:26:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70131 states, 70130 states have (on average 1.0839583630400684) internal successors, (76018), 70130 states have internal predecessors, (76018), 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 22:26:46,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70131 states to 70131 states and 76018 transitions. [2023-11-06 22:26:46,806 INFO L78 Accepts]: Start accepts. Automaton has 70131 states and 76018 transitions. Word has length 302 [2023-11-06 22:26:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:46,806 INFO L495 AbstractCegarLoop]: Abstraction has 70131 states and 76018 transitions. [2023-11-06 22:26:46,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 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 22:26:46,807 INFO L276 IsEmpty]: Start isEmpty. Operand 70131 states and 76018 transitions. [2023-11-06 22:26:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-06 22:26:46,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:46,856 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, 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, 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] [2023-11-06 22:26:46,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:47,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:47,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:47,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1906119544, now seen corresponding path program 1 times [2023-11-06 22:26:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:47,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135922826] [2023-11-06 22:26:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-06 22:26:47,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:47,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135922826] [2023-11-06 22:26:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135922826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:47,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:47,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:26:47,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327775053] [2023-11-06 22:26:47,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:47,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:47,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:26:47,932 INFO L87 Difference]: Start difference. First operand 70131 states and 76018 transitions. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 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 22:26:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:49,367 INFO L93 Difference]: Finished difference Result 200021 states and 217012 transitions. [2023-11-06 22:26:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 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 332 [2023-11-06 22:26:49,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:49,501 INFO L225 Difference]: With dead ends: 200021 [2023-11-06 22:26:49,501 INFO L226 Difference]: Without dead ends: 130298 [2023-11-06 22:26:49,520 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 22:26:49,521 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 198 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:49,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 485 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:26:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130298 states. [2023-11-06 22:26:51,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130298 to 127448. [2023-11-06 22:26:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127448 states, 127447 states have (on average 1.0860279174872691) internal successors, (138411), 127447 states have internal predecessors, (138411), 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 22:26:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127448 states to 127448 states and 138411 transitions. [2023-11-06 22:26:52,574 INFO L78 Accepts]: Start accepts. Automaton has 127448 states and 138411 transitions. Word has length 332 [2023-11-06 22:26:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:52,575 INFO L495 AbstractCegarLoop]: Abstraction has 127448 states and 138411 transitions. [2023-11-06 22:26:52,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 2 states have internal predecessors, (277), 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 22:26:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 127448 states and 138411 transitions. [2023-11-06 22:26:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2023-11-06 22:26:52,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:52,679 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:26:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 22:26:52,679 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:52,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:52,681 INFO L85 PathProgramCache]: Analyzing trace with hash -108013435, now seen corresponding path program 1 times [2023-11-06 22:26:52,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:52,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761360835] [2023-11-06 22:26:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:52,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 154 proven. 6 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-11-06 22:26:53,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:53,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761360835] [2023-11-06 22:26:53,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761360835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:53,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689016198] [2023-11-06 22:26:53,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:53,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:53,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:53,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:26:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:53,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:26:53,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:26:54,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:26:54,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689016198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:54,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:26:54,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:26:54,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282151934] [2023-11-06 22:26:54,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:54,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:26:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:26:54,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:54,096 INFO L87 Difference]: Start difference. First operand 127448 states and 138411 transitions. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 22:26:56,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:56,161 INFO L93 Difference]: Finished difference Result 251655 states and 273231 transitions. [2023-11-06 22:26:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:26:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 355 [2023-11-06 22:26:56,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:56,305 INFO L225 Difference]: With dead ends: 251655 [2023-11-06 22:26:56,305 INFO L226 Difference]: Without dead ends: 124615 [2023-11-06 22:26:56,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 354 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 22:26:56,361 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 165 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:56,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 277 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:26:56,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124615 states. [2023-11-06 22:26:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124615 to 121763. [2023-11-06 22:26:58,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121763 states, 121762 states have (on average 1.0801481578817693) internal successors, (131521), 121762 states have internal predecessors, (131521), 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 22:26:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121763 states to 121763 states and 131521 transitions. [2023-11-06 22:26:59,003 INFO L78 Accepts]: Start accepts. Automaton has 121763 states and 131521 transitions. Word has length 355 [2023-11-06 22:26:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:59,004 INFO L495 AbstractCegarLoop]: Abstraction has 121763 states and 131521 transitions. [2023-11-06 22:26:59,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 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 22:26:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 121763 states and 131521 transitions. [2023-11-06 22:26:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-06 22:26:59,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:59,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 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] [2023-11-06 22:26:59,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:59,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:59,295 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:59,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -246495530, now seen corresponding path program 1 times [2023-11-06 22:26:59,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:59,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652301590] [2023-11-06 22:26:59,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:59,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 134 proven. 6 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2023-11-06 22:27:00,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:27:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652301590] [2023-11-06 22:27:00,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652301590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:27:00,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116141246] [2023-11-06 22:27:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:00,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:00,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:27:00,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:27:00,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:27:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:27:01,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:27:01,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:27:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-06 22:27:01,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:27:01,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116141246] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:27:01,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:27:01,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 22:27:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121344699] [2023-11-06 22:27:01,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:27:01,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:27:01,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:01,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:27:01,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:27:01,611 INFO L87 Difference]: Start difference. First operand 121763 states and 131521 transitions. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 22:27:03,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:03,728 INFO L93 Difference]: Finished difference Result 253313 states and 273816 transitions. [2023-11-06 22:27:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:27:03,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 391 [2023-11-06 22:27:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:03,878 INFO L225 Difference]: With dead ends: 253313 [2023-11-06 22:27:03,879 INFO L226 Difference]: Without dead ends: 132772 [2023-11-06 22:27:03,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 390 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 22:27:03,937 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 91 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:03,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 121 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:27:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132772 states. [2023-11-06 22:27:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132772 to 124229. [2023-11-06 22:27:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124229 states, 124228 states have (on average 1.0749186978780951) internal successors, (133535), 124228 states have internal predecessors, (133535), 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 22:27:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124229 states to 124229 states and 133535 transitions. [2023-11-06 22:27:06,741 INFO L78 Accepts]: Start accepts. Automaton has 124229 states and 133535 transitions. Word has length 391 [2023-11-06 22:27:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:06,741 INFO L495 AbstractCegarLoop]: Abstraction has 124229 states and 133535 transitions. [2023-11-06 22:27:06,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 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 22:27:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 124229 states and 133535 transitions. [2023-11-06 22:27:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2023-11-06 22:27:06,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:27:06,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2023-11-06 22:27:06,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:27:07,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a835813c-9686-4b48-aad1-bfaf3fcfae51/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:27:07,036 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:27:07,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:27:07,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1249160803, now seen corresponding path program 1 times [2023-11-06 22:27:07,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:27:07,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229068841] [2023-11-06 22:27:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:27:07,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms