./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/down.i --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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/down.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/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 d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:36:32,460 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:36:32,602 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:36:32,614 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:36:32,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:36:32,661 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:36:32,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:36:32,663 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:36:32,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:36:32,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:36:32,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:36:32,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:36:32,674 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:36:32,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:36:32,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:36:32,678 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:36:32,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:36:32,679 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:36:32,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:36:32,680 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:36:32,681 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:36:32,681 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:36:32,682 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:36:32,683 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:36:32,683 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:36:32,684 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:36:32,685 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:36:32,685 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:36:32,686 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:36:32,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:36:32,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:36:32,689 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:36:32,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:36:32,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:36:32,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:36:32,690 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:36:32,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:36:32,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:36:32,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:36:32,692 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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2023-11-06 22:36:33,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:36:33,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:36:33,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:36:33,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:36:33,096 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:36:33,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/loop-invgen/down.i [2023-11-06 22:36:36,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:36:37,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:36:37,232 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/sv-benchmarks/c/loop-invgen/down.i [2023-11-06 22:36:37,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/data/6ee0b7165/75053229dac1480fb839f23c72567c7b/FLAG3f5de2582 [2023-11-06 22:36:37,266 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/data/6ee0b7165/75053229dac1480fb839f23c72567c7b [2023-11-06 22:36:37,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:36:37,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:36:37,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:36:37,285 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:36:37,291 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:36:37,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,294 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ef513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37, skipping insertion in model container [2023-11-06 22:36:37,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,328 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:36:37,575 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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/sv-benchmarks/c/loop-invgen/down.i[893,906] [2023-11-06 22:36:37,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:36:37,615 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:36:37,635 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_8d4926c3-a629-49f8-892b-c5da3d50ba4b/sv-benchmarks/c/loop-invgen/down.i[893,906] [2023-11-06 22:36:37,644 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:36:37,662 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:36:37,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37 WrapperNode [2023-11-06 22:36:37,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:36:37,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:36:37,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:36:37,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:36:37,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,705 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-11-06 22:36:37,705 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:36:37,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:36:37,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:36:37,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:36:37,717 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,717 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,719 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,719 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,729 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,731 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:36:37,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:36:37,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:36:37,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:36:37,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (1/1) ... [2023-11-06 22:36:37,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:36:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:37,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:36:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:36:37,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:36:37,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:36:37,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:36:37,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:36:37,932 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:36:37,935 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:36:38,152 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:36:38,160 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:36:38,160 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:36:38,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:38 BoogieIcfgContainer [2023-11-06 22:36:38,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:36:38,167 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:36:38,168 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:36:38,172 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:36:38,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:36:37" (1/3) ... [2023-11-06 22:36:38,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa8c1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:38, skipping insertion in model container [2023-11-06 22:36:38,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:36:37" (2/3) ... [2023-11-06 22:36:38,175 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa8c1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:36:38, skipping insertion in model container [2023-11-06 22:36:38,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:36:38" (3/3) ... [2023-11-06 22:36:38,177 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i [2023-11-06 22:36:38,202 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:36:38,203 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:36:38,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:36:38,279 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;@522ae104, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:36:38,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:36:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 22:36:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:36:38,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:38,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:38,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:38,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2023-11-06 22:36:38,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:38,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871384429] [2023-11-06 22:36:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:38,618 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 22:36:38,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:38,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871384429] [2023-11-06 22:36:38,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871384429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:36:38,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:36:38,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:36:38,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094182319] [2023-11-06 22:36:38,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:36:38,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:36:38,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:36:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:36:38,669 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 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 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 22:36:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:38,787 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2023-11-06 22:36:38,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:36:38,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2023-11-06 22:36:38,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:38,821 INFO L225 Difference]: With dead ends: 28 [2023-11-06 22:36:38,821 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 22:36:38,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:36:38,828 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:38,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 22:36:38,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 22:36:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 22:36:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-06 22:36:38,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-11-06 22:36:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:38,863 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-06 22:36:38,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 22:36:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-06 22:36:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 22:36:38,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:38,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:38,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:36:38,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:38,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:38,866 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2023-11-06 22:36:38,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:38,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39753712] [2023-11-06 22:36:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:39,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:39,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39753712] [2023-11-06 22:36:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39753712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:39,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885784746] [2023-11-06 22:36:39,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:39,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:39,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:39,030 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:39,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:36:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:39,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:36:39,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:39,194 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:36:39,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885784746] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:36:39,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:36:39,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-06 22:36:39,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430829526] [2023-11-06 22:36:39,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:36:39,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:36:39,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:39,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:36:39,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:36:39,199 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 22:36:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:39,239 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-11-06 22:36:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:36:39,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2023-11-06 22:36:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:39,240 INFO L225 Difference]: With dead ends: 20 [2023-11-06 22:36:39,241 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:36:39,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:36:39,243 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:39,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:36:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-11-06 22:36:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 22:36:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-11-06 22:36:39,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-11-06 22:36:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:39,250 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-11-06 22:36:39,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 22:36:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-11-06 22:36:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:36:39,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:39,252 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:39,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:36:39,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:39,463 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:39,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2023-11-06 22:36:39,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:39,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374172089] [2023-11-06 22:36:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:39,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:39,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374172089] [2023-11-06 22:36:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374172089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027991417] [2023-11-06 22:36:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:39,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:39,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:39,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:39,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:36:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:39,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:36:39,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:39,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:39,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027991417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:39,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:39,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-11-06 22:36:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203599367] [2023-11-06 22:36:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:36:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:36:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:36:39,798 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 22:36:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:39,886 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-11-06 22:36:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:36:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 11 [2023-11-06 22:36:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:39,888 INFO L225 Difference]: With dead ends: 23 [2023-11-06 22:36:39,888 INFO L226 Difference]: Without dead ends: 13 [2023-11-06 22:36:39,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:36:39,896 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:39,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-06 22:36:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-06 22:36:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 22:36:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-06 22:36:39,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-11-06 22:36:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:39,908 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-06 22:36:39,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 22:36:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-06 22:36:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:36:39,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:39,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:39,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:40,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:40,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:40,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2023-11-06 22:36:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:40,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932101138] [2023-11-06 22:36:40,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:40,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932101138] [2023-11-06 22:36:40,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932101138] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:40,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770952780] [2023-11-06 22:36:40,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:40,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:40,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:40,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:40,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:36:40,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:40,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:40,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:36:40,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:40,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770952780] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:40,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-11-06 22:36:40,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484384588] [2023-11-06 22:36:40,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:40,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:36:40,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:36:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:36:40,535 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 22:36:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:40,629 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-11-06 22:36:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:36:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 12 [2023-11-06 22:36:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:40,633 INFO L225 Difference]: With dead ends: 24 [2023-11-06 22:36:40,633 INFO L226 Difference]: Without dead ends: 22 [2023-11-06 22:36:40,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:36:40,642 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:40,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 28 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:40,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-06 22:36:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-11-06 22:36:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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 22:36:40,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-06 22:36:40,659 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-11-06 22:36:40,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:40,660 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-06 22:36:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 22:36:40,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-06 22:36:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:36:40,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:40,662 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:40,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:40,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 22:36:40,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:40,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2023-11-06 22:36:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579445304] [2023-11-06 22:36:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:41,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:41,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579445304] [2023-11-06 22:36:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579445304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526039920] [2023-11-06 22:36:41,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:36:41,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:41,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:41,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:41,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:36:41,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:36:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:41,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:36:41,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:41,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:41,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526039920] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:41,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:41,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-11-06 22:36:41,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989598754] [2023-11-06 22:36:41,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:36:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:36:41,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:36:41,381 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 22:36:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:41,500 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-11-06 22:36:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:36:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 15 [2023-11-06 22:36:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:41,502 INFO L225 Difference]: With dead ends: 30 [2023-11-06 22:36:41,502 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 22:36:41,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:36:41,504 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:41,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 22:36:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 22:36:41,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 22:36:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-06 22:36:41,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-11-06 22:36:41,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:41,512 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-06 22:36:41,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 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 22:36:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-06 22:36:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:36:41,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:41,514 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:41,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:41,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:41,721 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:41,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2023-11-06 22:36:41,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:41,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184380803] [2023-11-06 22:36:41,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:41,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:42,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184380803] [2023-11-06 22:36:42,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184380803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:42,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927940967] [2023-11-06 22:36:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:36:42,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:42,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:42,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:36:42,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:36:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:42,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:36:42,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:42,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927940967] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:42,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:42,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-11-06 22:36:42,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203578399] [2023-11-06 22:36:42,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:42,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:36:42,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:42,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:36:42,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:36:42,249 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 22:36:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:42,360 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-06 22:36:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:36:42,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 16 [2023-11-06 22:36:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:42,363 INFO L225 Difference]: With dead ends: 28 [2023-11-06 22:36:42,363 INFO L226 Difference]: Without dead ends: 26 [2023-11-06 22:36:42,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:36:42,368 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:42,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-06 22:36:42,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2023-11-06 22:36:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 22:36:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-11-06 22:36:42,382 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-11-06 22:36:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:42,383 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-11-06 22:36:42,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 22:36:42,383 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-11-06 22:36:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:36:42,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:42,384 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:42,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:42,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:36:42,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:42,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:42,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2023-11-06 22:36:42,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:42,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929448599] [2023-11-06 22:36:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:42,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:42,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929448599] [2023-11-06 22:36:42,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929448599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:42,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549592358] [2023-11-06 22:36:42,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:36:42,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:42,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:42,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:42,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:36:42,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-06 22:36:42,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:42,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:36:42,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:42,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:43,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549592358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:43,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:43,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-11-06 22:36:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926110359] [2023-11-06 22:36:43,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:43,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:36:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:36:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:36:43,041 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 22:36:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:43,154 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-11-06 22:36:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:36:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 19 [2023-11-06 22:36:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:43,155 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:36:43,155 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:36:43,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:36:43,157 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:43,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:36:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:36:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 22:36:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 22:36:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 22:36:43,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-11-06 22:36:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:43,164 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 22:36:43,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 22:36:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 22:36:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 22:36:43,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:43,165 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:43,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-06 22:36:43,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:43,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:43,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2023-11-06 22:36:43,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:43,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564013749] [2023-11-06 22:36:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:43,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564013749] [2023-11-06 22:36:43,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564013749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:43,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931651697] [2023-11-06 22:36:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:36:43,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:43,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:43,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:43,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:36:43,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-06 22:36:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:43,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:36:43,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:43,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931651697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:43,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-11-06 22:36:43,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126729138] [2023-11-06 22:36:43,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:36:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:43,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:36:43,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:36:43,772 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 22:36:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:43,878 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-11-06 22:36:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:36:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 20 [2023-11-06 22:36:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:43,880 INFO L225 Difference]: With dead ends: 32 [2023-11-06 22:36:43,880 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:36:43,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:36:43,881 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:43,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:36:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-11-06 22:36:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 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 22:36:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-06 22:36:43,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-11-06 22:36:43,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:43,890 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-06 22:36:43,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 22:36:43,891 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-06 22:36:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 22:36:43,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:43,892 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:43,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:44,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:44,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:44,100 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2023-11-06 22:36:44,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:44,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689773392] [2023-11-06 22:36:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:44,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689773392] [2023-11-06 22:36:44,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689773392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050986342] [2023-11-06 22:36:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:36:44,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:44,297 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:44,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:36:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:44,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:36:44,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:44,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:44,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050986342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:44,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:44,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2023-11-06 22:36:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858905909] [2023-11-06 22:36:44,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:36:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:36:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:36:44,591 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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 22:36:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:44,741 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-11-06 22:36:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:36:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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 23 [2023-11-06 22:36:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:44,742 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:36:44,742 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:36:44,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:36:44,744 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:44,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:36:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 22:36:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 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 22:36:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-06 22:36:44,751 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-11-06 22:36:44,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:44,751 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-06 22:36:44,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 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 22:36:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-06 22:36:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:36:44,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:44,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:44,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:44,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:44,959 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:44,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2023-11-06 22:36:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364190462] [2023-11-06 22:36:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:45,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364190462] [2023-11-06 22:36:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364190462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173127358] [2023-11-06 22:36:45,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:45,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:45,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:45,162 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:45,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:36:45,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:45,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:36:45,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:45,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:45,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173127358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-11-06 22:36:45,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627081034] [2023-11-06 22:36:45,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:36:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:36:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:36:45,468 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 22:36:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:45,604 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-06 22:36:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:36:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 24 [2023-11-06 22:36:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:45,614 INFO L225 Difference]: With dead ends: 36 [2023-11-06 22:36:45,614 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 22:36:45,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:36:45,616 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:45,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 26 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 22:36:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-11-06 22:36:45,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 22:36:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-11-06 22:36:45,630 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-11-06 22:36:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:45,630 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-11-06 22:36:45,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 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 22:36:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-11-06 22:36:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 22:36:45,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:45,632 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:45,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:45,838 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:45,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2023-11-06 22:36:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804704108] [2023-11-06 22:36:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:46,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:46,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804704108] [2023-11-06 22:36:46,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804704108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:46,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170920417] [2023-11-06 22:36:46,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:36:46,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:46,141 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:46,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:36:46,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:36:46,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:46,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:36:46,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:46,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:46,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170920417] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:46,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:46,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2023-11-06 22:36:46,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793743697] [2023-11-06 22:36:46,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:46,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:36:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:46,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:36:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:36:46,489 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 22:36:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:46,685 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-11-06 22:36:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:36:46,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 27 [2023-11-06 22:36:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:46,689 INFO L225 Difference]: With dead ends: 51 [2023-11-06 22:36:46,689 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:36:46,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:36:46,692 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:46,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 45 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:36:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-06 22:36:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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 22:36:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-06 22:36:46,707 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-11-06 22:36:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:46,708 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-06 22:36:46,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 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 22:36:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-06 22:36:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:36:46,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:46,711 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:46,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:46,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:46,918 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:46,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2023-11-06 22:36:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127892577] [2023-11-06 22:36:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:46,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127892577] [2023-11-06 22:36:47,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127892577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:47,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112007727] [2023-11-06 22:36:47,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:36:47,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:47,114 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:36:47,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:36:47,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:47,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:36:47,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:47,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:47,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112007727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:47,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:47,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2023-11-06 22:36:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288503040] [2023-11-06 22:36:47,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:47,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:36:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:36:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:36:47,427 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 22:36:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:47,592 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-11-06 22:36:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:36:47,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 28 [2023-11-06 22:36:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:47,593 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:36:47,593 INFO L226 Difference]: Without dead ends: 38 [2023-11-06 22:36:47,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:36:47,595 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:47,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-06 22:36:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-11-06 22:36:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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 22:36:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-06 22:36:47,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-11-06 22:36:47,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:47,604 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-06 22:36:47,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 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 22:36:47,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-06 22:36:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-06 22:36:47,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:47,606 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:47,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:47,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:36:47,813 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:47,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:47,814 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2023-11-06 22:36:47,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:47,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106159828] [2023-11-06 22:36:47,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:48,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106159828] [2023-11-06 22:36:48,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106159828] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:48,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639348571] [2023-11-06 22:36:48,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:36:48,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:48,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:48,103 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:48,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:36:48,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-06 22:36:48,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:48,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:36:48,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:48,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:48,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639348571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:48,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:48,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2023-11-06 22:36:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431448736] [2023-11-06 22:36:48,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:48,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:36:48,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:48,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:36:48,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:36:48,476 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 22:36:48,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:48,677 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-11-06 22:36:48,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:36:48,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 31 [2023-11-06 22:36:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:48,678 INFO L225 Difference]: With dead ends: 58 [2023-11-06 22:36:48,678 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:36:48,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:36:48,680 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:48,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:48,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:36:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:36:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 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 22:36:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-06 22:36:48,693 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-11-06 22:36:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:48,693 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-06 22:36:48,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 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 22:36:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-06 22:36:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 22:36:48,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:48,702 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:48,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:48,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:48,915 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:48,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2023-11-06 22:36:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635317313] [2023-11-06 22:36:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635317313] [2023-11-06 22:36:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635317313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365368253] [2023-11-06 22:36:49,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:36:49,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:49,190 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:49,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:36:49,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:36:49,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:49,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:36:49,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:49,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:49,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365368253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:49,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:49,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-11-06 22:36:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018134695] [2023-11-06 22:36:49,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:36:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:36:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:36:49,525 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 22:36:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:49,675 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-11-06 22:36:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:36:49,676 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 32 [2023-11-06 22:36:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:49,678 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:36:49,678 INFO L226 Difference]: Without dead ends: 42 [2023-11-06 22:36:49,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:36:49,679 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:49,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 28 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-06 22:36:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-11-06 22:36:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 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 22:36:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-11-06 22:36:49,688 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2023-11-06 22:36:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-11-06 22:36:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 22:36:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-11-06 22:36:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-06 22:36:49,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:49,690 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:49,895 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:49,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2023-11-06 22:36:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:49,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802401656] [2023-11-06 22:36:49,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:49,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802401656] [2023-11-06 22:36:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802401656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:50,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969280348] [2023-11-06 22:36:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:36:50,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:50,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:50,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:36:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:50,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:36:50,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:50,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:50,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969280348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:50,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:50,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2023-11-06 22:36:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358405890] [2023-11-06 22:36:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:36:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:50,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:36:50,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:36:50,612 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 22:36:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:50,845 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-11-06 22:36:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:36:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 35 [2023-11-06 22:36:50,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:50,846 INFO L225 Difference]: With dead ends: 65 [2023-11-06 22:36:50,846 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 22:36:50,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:36:50,848 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:50,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 22:36:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 22:36:50,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 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 22:36:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-11-06 22:36:50,857 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2023-11-06 22:36:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:50,857 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-11-06 22:36:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 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 22:36:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-11-06 22:36:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 22:36:50,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:50,859 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:50,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:36:51,066 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:51,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2023-11-06 22:36:51,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:51,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373261017] [2023-11-06 22:36:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:51,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:51,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373261017] [2023-11-06 22:36:51,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373261017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95578969] [2023-11-06 22:36:51,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:51,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:51,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:51,310 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:51,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:36:51,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:51,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:51,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:36:51,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:51,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:51,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95578969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:51,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:51,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-11-06 22:36:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523630993] [2023-11-06 22:36:51,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:36:51,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:51,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:36:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:36:51,726 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 22:36:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:51,884 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-11-06 22:36:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 22:36:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 36 [2023-11-06 22:36:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:51,885 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:36:51,885 INFO L226 Difference]: Without dead ends: 46 [2023-11-06 22:36:51,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:36:51,887 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:51,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 23 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-06 22:36:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-11-06 22:36:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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 22:36:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-11-06 22:36:51,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-11-06 22:36:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:51,897 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-11-06 22:36:51,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 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 22:36:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-11-06 22:36:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:36:51,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:51,899 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:51,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:52,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:36:52,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:52,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2023-11-06 22:36:52,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:52,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680046428] [2023-11-06 22:36:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:52,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680046428] [2023-11-06 22:36:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680046428] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733548262] [2023-11-06 22:36:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:36:52,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:52,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:52,466 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:52,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:36:52,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 22:36:52,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:52,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:36:52,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:52,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:52,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733548262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:52,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:52,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2023-11-06 22:36:52,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091403349] [2023-11-06 22:36:52,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:52,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:36:52,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:52,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:36:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:36:52,953 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 22:36:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:53,198 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-11-06 22:36:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:36:53,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 39 [2023-11-06 22:36:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:53,200 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:36:53,200 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 22:36:53,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:36:53,201 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:53,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 22:36:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-06 22:36:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 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 22:36:53,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-11-06 22:36:53,209 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-11-06 22:36:53,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:53,210 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-11-06 22:36:53,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 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 22:36:53,210 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-11-06 22:36:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:36:53,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:53,211 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:53,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:53,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:36:53,418 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:53,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2023-11-06 22:36:53,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:53,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337965671] [2023-11-06 22:36:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:53,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:53,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:53,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337965671] [2023-11-06 22:36:53,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337965671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:53,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070444345] [2023-11-06 22:36:53,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:36:53,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:53,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:53,675 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:36:53,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:36:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:53,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:36:53,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:53,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070444345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:54,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-11-06 22:36:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818943935] [2023-11-06 22:36:54,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:54,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:36:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:36:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:36:54,084 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 22:36:54,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:54,305 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-11-06 22:36:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:36:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 40 [2023-11-06 22:36:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:54,306 INFO L225 Difference]: With dead ends: 52 [2023-11-06 22:36:54,306 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 22:36:54,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:36:54,308 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:54,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 22:36:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-11-06 22:36:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 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 22:36:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-06 22:36:54,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-11-06 22:36:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:54,318 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-06 22:36:54,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 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 22:36:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-06 22:36:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 22:36:54,320 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:54,320 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:54,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:54,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:36:54,532 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:54,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2023-11-06 22:36:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184170076] [2023-11-06 22:36:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:54,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:54,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184170076] [2023-11-06 22:36:54,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184170076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033027207] [2023-11-06 22:36:54,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:36:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:54,946 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:54,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:36:55,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-06 22:36:55,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:55,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:36:55,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:55,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033027207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:55,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2023-11-06 22:36:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643244656] [2023-11-06 22:36:55,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:55,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:36:55,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:36:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:36:55,379 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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 22:36:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:55,628 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-11-06 22:36:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:36:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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 43 [2023-11-06 22:36:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:55,629 INFO L225 Difference]: With dead ends: 79 [2023-11-06 22:36:55,630 INFO L226 Difference]: Without dead ends: 45 [2023-11-06 22:36:55,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:36:55,632 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-06 22:36:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-06 22:36:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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 22:36:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-11-06 22:36:55,642 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-11-06 22:36:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:55,642 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-11-06 22:36:55,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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 22:36:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-11-06 22:36:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:36:55,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:55,643 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:55,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:55,856 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:55,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:55,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2023-11-06 22:36:55,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:55,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814294476] [2023-11-06 22:36:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:55,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:56,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814294476] [2023-11-06 22:36:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814294476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:56,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331807979] [2023-11-06 22:36:56,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:36:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:56,195 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:56,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:36:56,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-11-06 22:36:56,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:56,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:36:56,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:56,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:56,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331807979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:56,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:56,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2023-11-06 22:36:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967171654] [2023-11-06 22:36:56,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:56,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:36:56,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:56,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:36:56,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:36:56,672 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 22:36:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:56,882 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2023-11-06 22:36:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:36:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 44 [2023-11-06 22:36:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:56,890 INFO L225 Difference]: With dead ends: 56 [2023-11-06 22:36:56,890 INFO L226 Difference]: Without dead ends: 54 [2023-11-06 22:36:56,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 20 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:36:56,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:56,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-06 22:36:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-11-06 22:36:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 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 22:36:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-06 22:36:56,901 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-11-06 22:36:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:56,901 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-06 22:36:56,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 22:36:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-06 22:36:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 22:36:56,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:56,902 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:56,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:57,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:57,109 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:57,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2023-11-06 22:36:57,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:57,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821405080] [2023-11-06 22:36:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821405080] [2023-11-06 22:36:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821405080] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945201256] [2023-11-06 22:36:57,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:36:57,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:57,569 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:57,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:36:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:57,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:36:57,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:57,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945201256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:58,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:58,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2023-11-06 22:36:58,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100021317] [2023-11-06 22:36:58,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:58,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:36:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:36:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:36:58,094 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 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 22:36:58,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:58,451 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-11-06 22:36:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-06 22:36:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 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 47 [2023-11-06 22:36:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:58,452 INFO L225 Difference]: With dead ends: 86 [2023-11-06 22:36:58,452 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 22:36:58,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 71 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:36:58,454 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:58,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 22:36:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-06 22:36:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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 22:36:58,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-06 22:36:58,464 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-11-06 22:36:58,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:58,465 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-06 22:36:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 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 22:36:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-06 22:36:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-06 22:36:58,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:58,466 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:58,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:36:58,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:36:58,673 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:36:58,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:36:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2023-11-06 22:36:58,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:36:58,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009571614] [2023-11-06 22:36:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:36:58,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:36:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:36:59,126 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:59,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:36:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009571614] [2023-11-06 22:36:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009571614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:36:59,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113725924] [2023-11-06 22:36:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:36:59,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:36:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:36:59,129 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:36:59,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:36:59,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:36:59,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:36:59,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:36:59,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:36:59,310 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:59,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:36:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:36:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113725924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:36:59,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:36:59,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2023-11-06 22:36:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052874696] [2023-11-06 22:36:59,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:36:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-06 22:36:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:36:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-06 22:36:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:36:59,570 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 22:36:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:36:59,811 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-11-06 22:36:59,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:36:59,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 48 [2023-11-06 22:36:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:36:59,812 INFO L225 Difference]: With dead ends: 60 [2023-11-06 22:36:59,812 INFO L226 Difference]: Without dead ends: 58 [2023-11-06 22:36:59,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 22 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:36:59,815 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:36:59,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:36:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-06 22:36:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-11-06 22:36:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 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 22:36:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-11-06 22:36:59,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-11-06 22:36:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:36:59,840 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-11-06 22:36:59,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 22:36:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-11-06 22:36:59,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 22:36:59,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:36:59,841 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-06 22:36:59,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:00,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:37:00,046 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:00,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:00,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2023-11-06 22:37:00,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:00,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404777301] [2023-11-06 22:37:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:00,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:00,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404777301] [2023-11-06 22:37:00,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404777301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:00,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975907467] [2023-11-06 22:37:00,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:37:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:00,632 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:00,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:37:00,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-06 22:37:00,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:00,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:37:00,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:00,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:01,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975907467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:01,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2023-11-06 22:37:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686255663] [2023-11-06 22:37:01,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:37:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:37:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:37:01,298 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 22:37:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:01,714 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-11-06 22:37:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:37:01,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 51 [2023-11-06 22:37:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:01,715 INFO L225 Difference]: With dead ends: 93 [2023-11-06 22:37:01,715 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:37:01,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 77 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:37:01,717 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:01,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:37:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 22:37:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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 22:37:01,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-06 22:37:01,728 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-11-06 22:37:01,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:01,728 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-06 22:37:01,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 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 22:37:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-06 22:37:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 22:37:01,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:01,730 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:01,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:01,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:37:01,936 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:01,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:01,937 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2023-11-06 22:37:01,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:01,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337750957] [2023-11-06 22:37:01,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:01,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:02,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:02,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337750957] [2023-11-06 22:37:02,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337750957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:02,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846995153] [2023-11-06 22:37:02,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:37:02,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:02,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:02,378 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:02,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:37:02,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:37:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:02,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:37:02,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:02,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:02,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846995153] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:02,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:02,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2023-11-06 22:37:02,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392741679] [2023-11-06 22:37:02,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:02,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:37:02,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:02,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:37:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:37:02,943 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 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 22:37:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:03,216 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2023-11-06 22:37:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:37:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 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 52 [2023-11-06 22:37:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:03,218 INFO L225 Difference]: With dead ends: 64 [2023-11-06 22:37:03,218 INFO L226 Difference]: Without dead ends: 62 [2023-11-06 22:37:03,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 89 SyntacticMatches, 24 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:37:03,219 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:03,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 32 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-06 22:37:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2023-11-06 22:37:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 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 22:37:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-11-06 22:37:03,230 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-11-06 22:37:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:03,231 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-11-06 22:37:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 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 22:37:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-11-06 22:37:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 22:37:03,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:03,232 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:03,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:03,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:37:03,438 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:03,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2023-11-06 22:37:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402200743] [2023-11-06 22:37:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:04,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402200743] [2023-11-06 22:37:04,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402200743] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682120991] [2023-11-06 22:37:04,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:37:04,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:04,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:04,084 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:04,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:37:04,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-06 22:37:04,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:04,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:37:04,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:04,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682120991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:04,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:04,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2023-11-06 22:37:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282052639] [2023-11-06 22:37:04,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:37:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:37:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:37:04,677 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 22:37:05,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:05,078 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-11-06 22:37:05,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:37:05,078 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 55 [2023-11-06 22:37:05,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:05,079 INFO L225 Difference]: With dead ends: 100 [2023-11-06 22:37:05,079 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 22:37:05,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 83 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:37:05,081 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:05,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 22:37:05,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-06 22:37:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 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 22:37:05,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-11-06 22:37:05,092 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-11-06 22:37:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:05,093 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-11-06 22:37:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 22:37:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-11-06 22:37:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 22:37:05,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:05,094 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:05,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 22:37:05,300 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:05,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2023-11-06 22:37:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273536524] [2023-11-06 22:37:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:05,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273536524] [2023-11-06 22:37:05,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273536524] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:05,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487189633] [2023-11-06 22:37:05,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:37:05,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:05,742 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:05,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:37:05,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-06 22:37:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:05,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:37:05,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:05,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:06,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487189633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:06,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:06,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2023-11-06 22:37:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015886604] [2023-11-06 22:37:06,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:06,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:37:06,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:06,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:37:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:37:06,382 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 22:37:06,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:06,688 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2023-11-06 22:37:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-06 22:37:06,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 56 [2023-11-06 22:37:06,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:06,690 INFO L225 Difference]: With dead ends: 68 [2023-11-06 22:37:06,690 INFO L226 Difference]: Without dead ends: 66 [2023-11-06 22:37:06,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 96 SyntacticMatches, 26 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:37:06,691 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:06,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-06 22:37:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-11-06 22:37:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 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 22:37:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-11-06 22:37:06,706 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-11-06 22:37:06,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:06,707 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-11-06 22:37:06,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 22:37:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-11-06 22:37:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 22:37:06,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:06,711 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:06,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:06,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:37:06,918 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:06,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:06,918 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2023-11-06 22:37:06,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:06,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848156506] [2023-11-06 22:37:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:07,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848156506] [2023-11-06 22:37:07,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848156506] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:07,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031939504] [2023-11-06 22:37:07,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:37:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:07,696 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:07,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-06 22:37:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:07,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 22:37:07,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:07,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031939504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:08,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:08,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2023-11-06 22:37:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361638988] [2023-11-06 22:37:08,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:37:08,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:37:08,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:37:08,412 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 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 22:37:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:08,936 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-11-06 22:37:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:37:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 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 59 [2023-11-06 22:37:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:08,937 INFO L225 Difference]: With dead ends: 107 [2023-11-06 22:37:08,937 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 22:37:08,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 89 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:37:08,939 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:08,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 161 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 22:37:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-06 22:37:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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 22:37:08,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-11-06 22:37:08,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-11-06 22:37:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:08,955 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-11-06 22:37:08,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 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 22:37:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-11-06 22:37:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-06 22:37:08,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:08,957 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:08,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:37:09,163 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:09,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:09,164 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2023-11-06 22:37:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:09,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269527586] [2023-11-06 22:37:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:09,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:09,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269527586] [2023-11-06 22:37:09,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269527586] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:09,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391779959] [2023-11-06 22:37:09,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:09,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:09,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:09,639 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:09,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 22:37:09,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:09,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:09,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:37:09,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:09,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:10,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391779959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:10,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-11-06 22:37:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248848069] [2023-11-06 22:37:10,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:10,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:37:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:37:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:37:10,178 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 22:37:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:10,433 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-11-06 22:37:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 22:37:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 60 [2023-11-06 22:37:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:10,434 INFO L225 Difference]: With dead ends: 72 [2023-11-06 22:37:10,434 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 22:37:10,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 103 SyntacticMatches, 28 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:37:10,435 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:10,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 26 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 22:37:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-11-06 22:37:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 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 22:37:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-11-06 22:37:10,448 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-11-06 22:37:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:10,448 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-11-06 22:37:10,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 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 22:37:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-11-06 22:37:10,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 22:37:10,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:10,449 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:10,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:37:10,655 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:10,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2023-11-06 22:37:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:10,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330064696] [2023-11-06 22:37:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:10,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:11,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:11,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330064696] [2023-11-06 22:37:11,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330064696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:11,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137985068] [2023-11-06 22:37:11,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:37:11,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:11,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:11,422 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:11,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-06 22:37:11,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-06 22:37:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:11,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 22:37:11,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:11,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:12,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137985068] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:12,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:12,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2023-11-06 22:37:12,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741047146] [2023-11-06 22:37:12,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:12,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:37:12,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:37:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:37:12,213 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 22:37:12,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:12,731 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-11-06 22:37:12,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:37:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 63 [2023-11-06 22:37:12,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:12,732 INFO L225 Difference]: With dead ends: 114 [2023-11-06 22:37:12,732 INFO L226 Difference]: Without dead ends: 65 [2023-11-06 22:37:12,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 95 SyntacticMatches, 30 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:37:12,735 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:12,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 120 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:12,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-06 22:37:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-06 22:37:12,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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 22:37:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-11-06 22:37:12,749 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-11-06 22:37:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:12,750 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-11-06 22:37:12,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 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 22:37:12,750 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-11-06 22:37:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:37:12,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:12,751 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:12,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:12,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 22:37:12,952 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:12,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2023-11-06 22:37:12,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:12,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828339432] [2023-11-06 22:37:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:13,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828339432] [2023-11-06 22:37:13,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828339432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:13,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226741606] [2023-11-06 22:37:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:37:13,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:13,529 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:13,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-06 22:37:13,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:37:13,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:13,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:37:13,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:13,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:14,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226741606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:14,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:14,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2023-11-06 22:37:14,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100911473] [2023-11-06 22:37:14,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:14,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:37:14,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:37:14,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:37:14,162 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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 22:37:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:14,504 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2023-11-06 22:37:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-06 22:37:14,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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 64 [2023-11-06 22:37:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:14,505 INFO L225 Difference]: With dead ends: 76 [2023-11-06 22:37:14,505 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 22:37:14,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 110 SyntacticMatches, 30 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:37:14,507 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:14,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 36 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 22:37:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-06 22:37:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 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 22:37:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-11-06 22:37:14,522 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-11-06 22:37:14,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:14,522 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-11-06 22:37:14,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 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 22:37:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-11-06 22:37:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-06 22:37:14,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:14,524 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:14,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:14,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:14,730 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:14,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:14,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2023-11-06 22:37:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:14,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550404130] [2023-11-06 22:37:14,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550404130] [2023-11-06 22:37:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550404130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931966235] [2023-11-06 22:37:15,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:37:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:15,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:15,567 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:15,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 22:37:15,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-06 22:37:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:15,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:37:15,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:15,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:16,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931966235] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:16,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:16,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2023-11-06 22:37:16,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151015174] [2023-11-06 22:37:16,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:16,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:37:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:37:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:37:16,344 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 22:37:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:16,879 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-11-06 22:37:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:37:16,879 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 67 [2023-11-06 22:37:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:16,880 INFO L225 Difference]: With dead ends: 121 [2023-11-06 22:37:16,880 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 22:37:16,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 32 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:37:16,882 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:16,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 22:37:16,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 22:37:16,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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 22:37:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-11-06 22:37:16,897 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-11-06 22:37:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:16,898 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-11-06 22:37:16,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 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 22:37:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-11-06 22:37:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-06 22:37:16,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:16,899 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:16,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:17,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:17,105 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:17,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2023-11-06 22:37:17,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:17,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894030025] [2023-11-06 22:37:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:17,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894030025] [2023-11-06 22:37:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894030025] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:17,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642456507] [2023-11-06 22:37:17,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:37:17,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:17,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:17,606 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:17,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-06 22:37:17,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-06 22:37:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:17,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:37:17,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:17,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:18,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642456507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:18,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:18,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2023-11-06 22:37:18,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826114506] [2023-11-06 22:37:18,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:18,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:37:18,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:37:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:37:18,232 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 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 22:37:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:18,554 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2023-11-06 22:37:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-06 22:37:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 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 68 [2023-11-06 22:37:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:18,559 INFO L225 Difference]: With dead ends: 80 [2023-11-06 22:37:18,560 INFO L226 Difference]: Without dead ends: 78 [2023-11-06 22:37:18,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 32 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:37:18,561 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:18,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 33 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:18,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-06 22:37:18,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-11-06 22:37:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 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 22:37:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-11-06 22:37:18,575 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-11-06 22:37:18,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:18,576 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-11-06 22:37:18,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 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 22:37:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-11-06 22:37:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-06 22:37:18,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:18,577 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:18,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-06 22:37:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:18,777 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:18,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2023-11-06 22:37:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:18,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516322780] [2023-11-06 22:37:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:19,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516322780] [2023-11-06 22:37:19,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516322780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808579548] [2023-11-06 22:37:19,663 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:37:19,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:19,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:19,665 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:19,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-06 22:37:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:19,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:37:19,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:19,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:20,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808579548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:20,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:20,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2023-11-06 22:37:20,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575968420] [2023-11-06 22:37:20,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:20,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:37:20,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:37:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:37:20,404 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 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 22:37:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:20,986 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-11-06 22:37:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:37:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 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 71 [2023-11-06 22:37:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:20,987 INFO L225 Difference]: With dead ends: 128 [2023-11-06 22:37:20,987 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 22:37:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 107 SyntacticMatches, 34 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:37:20,992 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:20,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 142 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 22:37:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-06 22:37:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 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 22:37:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-11-06 22:37:21,007 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-11-06 22:37:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:21,007 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-11-06 22:37:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 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 22:37:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-11-06 22:37:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-06 22:37:21,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:21,009 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:21,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:21,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,211 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:21,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2023-11-06 22:37:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:21,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745913965] [2023-11-06 22:37:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:21,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:21,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745913965] [2023-11-06 22:37:21,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745913965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:21,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708788953] [2023-11-06 22:37:21,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:21,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:21,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:21,846 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:21,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-06 22:37:21,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:21,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:37:21,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:22,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:22,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708788953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:22,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:22,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2023-11-06 22:37:22,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092886835] [2023-11-06 22:37:22,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:22,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:37:22,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:22,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:37:22,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:37:22,671 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 22:37:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:23,043 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2023-11-06 22:37:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-06 22:37:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 72 [2023-11-06 22:37:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:23,045 INFO L225 Difference]: With dead ends: 84 [2023-11-06 22:37:23,045 INFO L226 Difference]: Without dead ends: 82 [2023-11-06 22:37:23,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 34 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:37:23,047 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:23,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-06 22:37:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-11-06 22:37:23,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 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 22:37:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-11-06 22:37:23,061 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-11-06 22:37:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:23,061 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-11-06 22:37:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 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 22:37:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-11-06 22:37:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 22:37:23,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:23,063 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:23,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-06 22:37:23,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-06 22:37:23,266 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:23,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:23,267 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2023-11-06 22:37:23,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070972535] [2023-11-06 22:37:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:23,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:24,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:24,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070972535] [2023-11-06 22:37:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070972535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240105744] [2023-11-06 22:37:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:37:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:24,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:24,218 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:24,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-06 22:37:24,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-06 22:37:24,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:24,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-06 22:37:24,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:24,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:25,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240105744] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:25,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:25,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2023-11-06 22:37:25,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830328761] [2023-11-06 22:37:25,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:25,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 22:37:25,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 22:37:25,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:37:25,169 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 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 22:37:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:25,753 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-11-06 22:37:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:37:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 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 75 [2023-11-06 22:37:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:25,754 INFO L225 Difference]: With dead ends: 135 [2023-11-06 22:37:25,755 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 22:37:25,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 113 SyntacticMatches, 36 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:37:25,757 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:25,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 231 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 22:37:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-06 22:37:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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 22:37:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-11-06 22:37:25,773 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-11-06 22:37:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:25,773 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-11-06 22:37:25,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 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 22:37:25,774 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-11-06 22:37:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-06 22:37:25,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:25,774 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:25,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-06 22:37:25,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:25,975 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:25,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2023-11-06 22:37:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:25,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771437587] [2023-11-06 22:37:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771437587] [2023-11-06 22:37:26,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771437587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:26,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663785173] [2023-11-06 22:37:26,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:37:26,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:26,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:26,658 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:26,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 22:37:26,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:37:26,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:26,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:37:26,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:26,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:27,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663785173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:27,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:27,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2023-11-06 22:37:27,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017772002] [2023-11-06 22:37:27,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:27,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:37:27,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:37:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:37:27,480 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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 22:37:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:27,888 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2023-11-06 22:37:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-06 22:37:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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 76 [2023-11-06 22:37:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:27,889 INFO L225 Difference]: With dead ends: 88 [2023-11-06 22:37:27,889 INFO L226 Difference]: Without dead ends: 86 [2023-11-06 22:37:27,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 131 SyntacticMatches, 36 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:37:27,891 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:27,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-06 22:37:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-11-06 22:37:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 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 22:37:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-11-06 22:37:27,904 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2023-11-06 22:37:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:27,904 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-11-06 22:37:27,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 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 22:37:27,905 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-11-06 22:37:27,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-06 22:37:27,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:27,906 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:27,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:28,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:28,106 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:28,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:28,107 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2023-11-06 22:37:28,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:28,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031743312] [2023-11-06 22:37:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:28,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031743312] [2023-11-06 22:37:29,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031743312] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:29,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547388643] [2023-11-06 22:37:29,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:37:29,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:29,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:29,224 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:29,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-06 22:37:29,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-06 22:37:29,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:29,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:37:29,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:29,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547388643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:30,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:30,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2023-11-06 22:37:30,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662779317] [2023-11-06 22:37:30,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:30,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 22:37:30,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 22:37:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:37:30,136 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 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 22:37:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:30,765 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-11-06 22:37:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 22:37:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 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 79 [2023-11-06 22:37:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:30,766 INFO L225 Difference]: With dead ends: 142 [2023-11-06 22:37:30,766 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 22:37:30,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 119 SyntacticMatches, 38 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:37:30,769 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:30,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 169 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 22:37:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-06 22:37:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 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 22:37:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-11-06 22:37:30,780 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2023-11-06 22:37:30,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:30,781 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-11-06 22:37:30,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 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 22:37:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-11-06 22:37:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-06 22:37:30,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:30,782 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:30,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:30,987 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:30,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2023-11-06 22:37:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889125779] [2023-11-06 22:37:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:30,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:31,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889125779] [2023-11-06 22:37:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889125779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:31,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335487280] [2023-11-06 22:37:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:37:31,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:31,672 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:31,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-06 22:37:31,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-11-06 22:37:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:31,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:37:31,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:32,004 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:32,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:32,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335487280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:32,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:32,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2023-11-06 22:37:32,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362004757] [2023-11-06 22:37:32,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:32,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:37:32,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:37:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:37:32,668 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 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 22:37:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:33,075 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2023-11-06 22:37:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-06 22:37:33,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 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 80 [2023-11-06 22:37:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:33,077 INFO L225 Difference]: With dead ends: 92 [2023-11-06 22:37:33,077 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 22:37:33,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 138 SyntacticMatches, 38 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2023-11-06 22:37:33,079 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:33,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 31 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 22:37:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-11-06 22:37:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 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 22:37:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2023-11-06 22:37:33,101 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2023-11-06 22:37:33,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:33,101 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2023-11-06 22:37:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 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 22:37:33,102 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2023-11-06 22:37:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-06 22:37:33,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:33,102 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:33,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:33,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-06 22:37:33,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:33,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2023-11-06 22:37:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:33,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121118720] [2023-11-06 22:37:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:33,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:34,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121118720] [2023-11-06 22:37:34,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121118720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:34,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892127633] [2023-11-06 22:37:34,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:37:34,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:34,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:34,543 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:34,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-06 22:37:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:34,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 22:37:34,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:34,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:35,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892127633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:35,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:35,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2023-11-06 22:37:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380403152] [2023-11-06 22:37:35,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-06 22:37:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:35,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-06 22:37:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2023-11-06 22:37:35,582 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 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 22:37:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:36,222 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-11-06 22:37:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-06 22:37:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 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 83 [2023-11-06 22:37:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:36,224 INFO L225 Difference]: With dead ends: 149 [2023-11-06 22:37:36,224 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 22:37:36,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 125 SyntacticMatches, 40 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:37:36,226 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:36,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 133 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:37:36,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 22:37:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-06 22:37:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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 22:37:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-11-06 22:37:36,254 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-11-06 22:37:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:36,254 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-11-06 22:37:36,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 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 22:37:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-11-06 22:37:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-06 22:37:36,255 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:36,255 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:36,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:36,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-06 22:37:36,455 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:36,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2023-11-06 22:37:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190259771] [2023-11-06 22:37:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:36,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190259771] [2023-11-06 22:37:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190259771] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832019594] [2023-11-06 22:37:37,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:37,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:37,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:37,145 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:37,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-06 22:37:37,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:37,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:37,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:37:37,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:37,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:38,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832019594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:38,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:38,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-11-06 22:37:38,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415465836] [2023-11-06 22:37:38,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:38,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:37:38,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:38,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:37:38,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:37:38,046 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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 22:37:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:38,518 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2023-11-06 22:37:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-06 22:37:38,519 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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 84 [2023-11-06 22:37:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:38,520 INFO L225 Difference]: With dead ends: 96 [2023-11-06 22:37:38,520 INFO L226 Difference]: Without dead ends: 94 [2023-11-06 22:37:38,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 145 SyntacticMatches, 40 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2023-11-06 22:37:38,522 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:38,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 38 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-06 22:37:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-11-06 22:37:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 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 22:37:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-11-06 22:37:38,545 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-11-06 22:37:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:38,546 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-11-06 22:37:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 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 22:37:38,547 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-11-06 22:37:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-06 22:37:38,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:38,547 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:38,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-06 22:37:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-06 22:37:38,748 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:38,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2023-11-06 22:37:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:38,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692355153] [2023-11-06 22:37:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:40,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:40,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692355153] [2023-11-06 22:37:40,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692355153] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:40,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772322800] [2023-11-06 22:37:40,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:37:40,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:40,061 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:40,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-06 22:37:40,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-06 22:37:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:40,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:37:40,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:40,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:41,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772322800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:41,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:41,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2023-11-06 22:37:41,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390426719] [2023-11-06 22:37:41,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:41,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-06 22:37:41,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-06 22:37:41,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2023-11-06 22:37:41,271 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 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 22:37:42,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:42,028 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-11-06 22:37:42,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-06 22:37:42,029 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 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 87 [2023-11-06 22:37:42,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:42,030 INFO L225 Difference]: With dead ends: 156 [2023-11-06 22:37:42,030 INFO L226 Difference]: Without dead ends: 89 [2023-11-06 22:37:42,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 131 SyntacticMatches, 42 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 22:37:42,031 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:42,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 143 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-06 22:37:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-11-06 22:37:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 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 22:37:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-11-06 22:37:42,051 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-11-06 22:37:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:42,051 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-11-06 22:37:42,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 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 22:37:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-11-06 22:37:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 22:37:42,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:42,052 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:42,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:42,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:42,258 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:42,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2023-11-06 22:37:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:42,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941493365] [2023-11-06 22:37:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:42,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941493365] [2023-11-06 22:37:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941493365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:43,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121645443] [2023-11-06 22:37:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:37:43,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:43,053 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:43,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-06 22:37:43,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:37:43,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:43,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:37:43,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:43,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:44,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121645443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:44,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:44,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-11-06 22:37:44,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244497391] [2023-11-06 22:37:44,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:44,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:37:44,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:44,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:37:44,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:37:44,013 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 22:37:44,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:44,464 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2023-11-06 22:37:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 22:37:44,465 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 88 [2023-11-06 22:37:44,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:44,466 INFO L225 Difference]: With dead ends: 100 [2023-11-06 22:37:44,466 INFO L226 Difference]: Without dead ends: 98 [2023-11-06 22:37:44,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 152 SyntacticMatches, 42 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2023-11-06 22:37:44,467 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 48 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:44,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-06 22:37:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-11-06 22:37:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 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 22:37:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-11-06 22:37:44,489 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-11-06 22:37:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:44,489 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-11-06 22:37:44,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 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 22:37:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-11-06 22:37:44,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-06 22:37:44,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:44,490 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:44,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-06 22:37:44,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-11-06 22:37:44,694 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:44,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:44,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2023-11-06 22:37:44,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:44,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236409610] [2023-11-06 22:37:44,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:44,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:46,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236409610] [2023-11-06 22:37:46,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236409610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:46,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357963858] [2023-11-06 22:37:46,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:37:46,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:46,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:46,118 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:46,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-06 22:37:46,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-06 22:37:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:46,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:37:46,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:46,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357963858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:47,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2023-11-06 22:37:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714719797] [2023-11-06 22:37:47,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:47,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-06 22:37:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-06 22:37:47,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2023-11-06 22:37:47,351 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 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 22:37:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:48,086 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-11-06 22:37:48,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-06 22:37:48,086 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 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 91 [2023-11-06 22:37:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:48,087 INFO L225 Difference]: With dead ends: 163 [2023-11-06 22:37:48,088 INFO L226 Difference]: Without dead ends: 93 [2023-11-06 22:37:48,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 137 SyntacticMatches, 44 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:37:48,090 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:48,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 210 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-06 22:37:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-11-06 22:37:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 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 22:37:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-11-06 22:37:48,118 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-11-06 22:37:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:48,119 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-11-06 22:37:48,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 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 22:37:48,119 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-11-06 22:37:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-06 22:37:48,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:48,120 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:48,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:48,326 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:48,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2023-11-06 22:37:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137193685] [2023-11-06 22:37:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:49,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137193685] [2023-11-06 22:37:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137193685] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251271637] [2023-11-06 22:37:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:37:49,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:49,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:49,309 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:49,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-06 22:37:49,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-11-06 22:37:49,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:49,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:37:49,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:49,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251271637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:50,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:50,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2023-11-06 22:37:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852936906] [2023-11-06 22:37:50,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:50,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:37:50,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:37:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:37:50,436 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 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 22:37:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:50,935 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2023-11-06 22:37:50,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 22:37:50,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 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 92 [2023-11-06 22:37:50,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:50,937 INFO L225 Difference]: With dead ends: 104 [2023-11-06 22:37:50,937 INFO L226 Difference]: Without dead ends: 102 [2023-11-06 22:37:50,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 159 SyntacticMatches, 44 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:37:50,939 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:50,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-06 22:37:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-11-06 22:37:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 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 22:37:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-11-06 22:37:50,967 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-11-06 22:37:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:50,968 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-11-06 22:37:50,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 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 22:37:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-11-06 22:37:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:37:50,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:50,970 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:50,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:51,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-06 22:37:51,176 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:51,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2023-11-06 22:37:51,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:51,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655824142] [2023-11-06 22:37:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655824142] [2023-11-06 22:37:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655824142] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:52,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173119933] [2023-11-06 22:37:52,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:37:52,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:52,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:52,492 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:52,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-06 22:37:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:52,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 22:37:52,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:52,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173119933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:53,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:53,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2023-11-06 22:37:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382738375] [2023-11-06 22:37:53,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 22:37:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 22:37:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2023-11-06 22:37:53,793 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 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 22:37:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:54,772 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-11-06 22:37:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-06 22:37:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 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 95 [2023-11-06 22:37:54,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:54,774 INFO L225 Difference]: With dead ends: 170 [2023-11-06 22:37:54,774 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 22:37:54,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 143 SyntacticMatches, 46 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 22:37:54,775 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:54,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 237 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:37:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 22:37:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-06 22:37:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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 22:37:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-11-06 22:37:54,801 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-11-06 22:37:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:54,801 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-11-06 22:37:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 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 22:37:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-11-06 22:37:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:37:54,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:54,803 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:54,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-06 22:37:55,006 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:55,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2023-11-06 22:37:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960292686] [2023-11-06 22:37:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:55,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:55,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960292686] [2023-11-06 22:37:55,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960292686] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:55,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31942082] [2023-11-06 22:37:55,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:37:55,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:55,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:55,995 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:56,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-06 22:37:56,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:37:56,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:56,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:37:56,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:56,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:37:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:57,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31942082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:37:57,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:37:57,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2023-11-06 22:37:57,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159452619] [2023-11-06 22:37:57,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:37:57,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:37:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:37:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:37:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:37:57,082 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 22:37:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:37:57,609 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2023-11-06 22:37:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:37:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 96 [2023-11-06 22:37:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:37:57,611 INFO L225 Difference]: With dead ends: 108 [2023-11-06 22:37:57,611 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 22:37:57,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 166 SyntacticMatches, 46 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:37:57,612 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:37:57,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 31 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:37:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 22:37:57,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-11-06 22:37:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 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 22:37:57,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-11-06 22:37:57,635 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-11-06 22:37:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:37:57,635 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-11-06 22:37:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 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 22:37:57,635 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-11-06 22:37:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-06 22:37:57,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:37:57,636 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-06 22:37:57,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-11-06 22:37:57,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-06 22:37:57,842 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:37:57,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:37:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2023-11-06 22:37:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:37:57,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508527295] [2023-11-06 22:37:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:37:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:37:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:37:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:59,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:37:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508527295] [2023-11-06 22:37:59,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508527295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:37:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954132595] [2023-11-06 22:37:59,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:37:59,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:37:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:37:59,256 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:37:59,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-06 22:37:59,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-06 22:37:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:37:59,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 22:37:59,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:37:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:37:59,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:00,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954132595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:00,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:00,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2023-11-06 22:38:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46967002] [2023-11-06 22:38:00,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:00,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-06 22:38:00,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-06 22:38:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2023-11-06 22:38:00,536 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 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 22:38:01,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:01,568 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-11-06 22:38:01,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-06 22:38:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 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 99 [2023-11-06 22:38:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:01,570 INFO L225 Difference]: With dead ends: 177 [2023-11-06 22:38:01,570 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 22:38:01,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 149 SyntacticMatches, 48 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:38:01,572 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 276 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 22:38:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-06 22:38:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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 22:38:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-11-06 22:38:01,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-11-06 22:38:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:01,598 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-11-06 22:38:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 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 22:38:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-11-06 22:38:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-06 22:38:01,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:01,600 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:01,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-06 22:38:01,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-06 22:38:01,806 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:01,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:01,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2023-11-06 22:38:01,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:01,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999019454] [2023-11-06 22:38:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:02,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:02,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999019454] [2023-11-06 22:38:02,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999019454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:02,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989796040] [2023-11-06 22:38:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:38:02,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:02,650 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:02,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-06 22:38:02,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:38:02,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:02,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:38:02,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:02,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:03,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989796040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:03,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:03,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2023-11-06 22:38:03,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479325610] [2023-11-06 22:38:03,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:03,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:38:03,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:38:03,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:38:03,830 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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 22:38:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:04,355 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2023-11-06 22:38:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-06 22:38:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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 100 [2023-11-06 22:38:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:04,357 INFO L225 Difference]: With dead ends: 112 [2023-11-06 22:38:04,357 INFO L226 Difference]: Without dead ends: 110 [2023-11-06 22:38:04,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 173 SyntacticMatches, 48 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2023-11-06 22:38:04,358 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:04,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 30 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:04,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-06 22:38:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-11-06 22:38:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 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 22:38:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-11-06 22:38:04,390 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-11-06 22:38:04,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:04,390 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-11-06 22:38:04,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 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 22:38:04,391 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-11-06 22:38:04,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-06 22:38:04,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:04,392 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:04,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-06 22:38:04,599 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:04,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2023-11-06 22:38:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:04,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386639355] [2023-11-06 22:38:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:06,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:06,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386639355] [2023-11-06 22:38:06,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386639355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:06,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610008382] [2023-11-06 22:38:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:38:06,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:06,039 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-06 22:38:06,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-11-06 22:38:06,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:06,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:38:06,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:06,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:07,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610008382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:07,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:07,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2023-11-06 22:38:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459733138] [2023-11-06 22:38:07,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:07,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-06 22:38:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-06 22:38:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2023-11-06 22:38:07,476 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 22:38:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:08,343 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-11-06 22:38:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-06 22:38:08,344 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 103 [2023-11-06 22:38:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:08,345 INFO L225 Difference]: With dead ends: 184 [2023-11-06 22:38:08,345 INFO L226 Difference]: Without dead ends: 105 [2023-11-06 22:38:08,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 155 SyntacticMatches, 50 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2023-11-06 22:38:08,348 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:08,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 222 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-06 22:38:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-06 22:38:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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 22:38:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-11-06 22:38:08,367 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-11-06 22:38:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:08,368 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-11-06 22:38:08,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 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 22:38:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-11-06 22:38:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-06 22:38:08,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:08,369 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:08,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-06 22:38:08,575 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:08,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2023-11-06 22:38:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:08,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126553692] [2023-11-06 22:38:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:08,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:09,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126553692] [2023-11-06 22:38:09,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126553692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:09,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449189369] [2023-11-06 22:38:09,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:38:09,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:09,386 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-06 22:38:09,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-11-06 22:38:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:09,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:38:09,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:09,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:10,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449189369] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:10,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:10,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2023-11-06 22:38:10,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943603530] [2023-11-06 22:38:10,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:10,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 22:38:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 22:38:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:38:10,456 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 22:38:10,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:10,909 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2023-11-06 22:38:10,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:38:10,909 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 104 [2023-11-06 22:38:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:10,910 INFO L225 Difference]: With dead ends: 116 [2023-11-06 22:38:10,910 INFO L226 Difference]: Without dead ends: 114 [2023-11-06 22:38:10,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 180 SyntacticMatches, 50 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1165, Invalid=2027, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 22:38:10,912 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:10,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 32 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:38:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-06 22:38:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-11-06 22:38:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 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 22:38:10,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-11-06 22:38:10,939 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-11-06 22:38:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:10,939 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-11-06 22:38:10,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 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 22:38:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-11-06 22:38:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-06 22:38:10,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:10,941 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:10,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:11,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-06 22:38:11,146 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:11,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:11,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2023-11-06 22:38:11,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:11,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127699294] [2023-11-06 22:38:11,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:11,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:12,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127699294] [2023-11-06 22:38:12,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127699294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573555838] [2023-11-06 22:38:12,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:38:12,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:12,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:12,535 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:12,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-06 22:38:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:12,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-06 22:38:12,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:12,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573555838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:13,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:13,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2023-11-06 22:38:13,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225593714] [2023-11-06 22:38:13,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:13,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:38:13,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:38:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:38:13,854 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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 22:38:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:14,987 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-11-06 22:38:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-06 22:38:14,987 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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 107 [2023-11-06 22:38:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:14,988 INFO L225 Difference]: With dead ends: 191 [2023-11-06 22:38:14,989 INFO L226 Difference]: Without dead ends: 109 [2023-11-06 22:38:14,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 161 SyntacticMatches, 52 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2549 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2023-11-06 22:38:14,994 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:14,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 278 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:14,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-06 22:38:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-06 22:38:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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 22:38:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-11-06 22:38:15,027 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-11-06 22:38:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:15,028 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-11-06 22:38:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 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 22:38:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-11-06 22:38:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:38:15,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:15,030 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:15,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:15,239 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:15,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2023-11-06 22:38:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:15,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033650306] [2023-11-06 22:38:15,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:15,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033650306] [2023-11-06 22:38:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033650306] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611765298] [2023-11-06 22:38:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:16,234 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:16,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-06 22:38:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:16,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:38:16,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:16,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:17,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611765298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:17,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:17,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2023-11-06 22:38:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898826481] [2023-11-06 22:38:17,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:17,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 22:38:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:17,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 22:38:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:38:17,360 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 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 22:38:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:17,860 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2023-11-06 22:38:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-06 22:38:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 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 108 [2023-11-06 22:38:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:17,861 INFO L225 Difference]: With dead ends: 120 [2023-11-06 22:38:17,862 INFO L226 Difference]: Without dead ends: 118 [2023-11-06 22:38:17,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 187 SyntacticMatches, 52 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1250, Invalid=2172, Unknown=0, NotChecked=0, Total=3422 [2023-11-06 22:38:17,863 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:17,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 33 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-06 22:38:17,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-11-06 22:38:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 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 22:38:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-11-06 22:38:17,888 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-11-06 22:38:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:17,888 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-11-06 22:38:17,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 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 22:38:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-11-06 22:38:17,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-06 22:38:17,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:17,889 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:17,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-06 22:38:18,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:18,090 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:18,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2023-11-06 22:38:18,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:18,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742611245] [2023-11-06 22:38:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:18,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:19,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:19,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742611245] [2023-11-06 22:38:19,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742611245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:19,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30467201] [2023-11-06 22:38:19,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:38:19,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:19,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:19,546 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:19,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-06 22:38:19,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-11-06 22:38:19,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:19,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-06 22:38:19,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:19,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30467201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:21,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:21,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2023-11-06 22:38:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679694848] [2023-11-06 22:38:21,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:21,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-06 22:38:21,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:21,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-06 22:38:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 22:38:21,030 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 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 22:38:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:22,075 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-11-06 22:38:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-06 22:38:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 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 111 [2023-11-06 22:38:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:22,076 INFO L225 Difference]: With dead ends: 198 [2023-11-06 22:38:22,076 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 22:38:22,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 167 SyntacticMatches, 54 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2023-11-06 22:38:22,077 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:22,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 294 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:22,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 22:38:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-06 22:38:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 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 22:38:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-11-06 22:38:22,108 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-11-06 22:38:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:22,108 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-11-06 22:38:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 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 22:38:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-11-06 22:38:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-11-06 22:38:22,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:22,110 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:22,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:22,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:22,316 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:22,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2023-11-06 22:38:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643612438] [2023-11-06 22:38:22,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:22,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:23,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:23,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643612438] [2023-11-06 22:38:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643612438] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:23,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531266465] [2023-11-06 22:38:23,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:38:23,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:23,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:23,166 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:23,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-06 22:38:23,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:38:23,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:23,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:38:23,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:23,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:24,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531266465] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:24,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:24,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2023-11-06 22:38:24,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316405906] [2023-11-06 22:38:24,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:24,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-06 22:38:24,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:24,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-06 22:38:24,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:38:24,404 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 22:38:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:24,937 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2023-11-06 22:38:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-06 22:38:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 112 [2023-11-06 22:38:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:24,939 INFO L225 Difference]: With dead ends: 124 [2023-11-06 22:38:24,939 INFO L226 Difference]: Without dead ends: 122 [2023-11-06 22:38:24,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 194 SyntacticMatches, 54 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1338, Invalid=2322, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 22:38:24,939 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:24,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 35 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:24,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-11-06 22:38:24,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-11-06 22:38:24,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 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 22:38:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-11-06 22:38:24,959 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-11-06 22:38:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:24,959 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-11-06 22:38:24,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 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 22:38:24,959 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-11-06 22:38:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-06 22:38:24,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:24,960 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:24,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-06 22:38:25,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:25,161 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:25,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2023-11-06 22:38:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030147367] [2023-11-06 22:38:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:26,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:26,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030147367] [2023-11-06 22:38:26,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030147367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:26,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39706533] [2023-11-06 22:38:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:38:26,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:26,662 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:26,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-06 22:38:26,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-11-06 22:38:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:26,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:38:26,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:26,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:28,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39706533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:28,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:28,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2023-11-06 22:38:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548981423] [2023-11-06 22:38:28,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:28,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-06 22:38:28,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-06 22:38:28,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2023-11-06 22:38:28,174 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 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 22:38:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:29,233 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-11-06 22:38:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-06 22:38:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 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 115 [2023-11-06 22:38:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:29,235 INFO L225 Difference]: With dead ends: 205 [2023-11-06 22:38:29,235 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 22:38:29,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 173 SyntacticMatches, 56 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2023-11-06 22:38:29,237 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:29,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 277 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 22:38:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-06 22:38:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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 22:38:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-11-06 22:38:29,267 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-11-06 22:38:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:29,267 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-11-06 22:38:29,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 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 22:38:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-11-06 22:38:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-06 22:38:29,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:29,268 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:29,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-06 22:38:29,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:29,469 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:29,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2023-11-06 22:38:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:29,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245445161] [2023-11-06 22:38:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:30,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245445161] [2023-11-06 22:38:30,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245445161] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:30,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813860704] [2023-11-06 22:38:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:38:30,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:30,470 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:30,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-06 22:38:30,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-11-06 22:38:30,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:30,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:38:30,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:30,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:31,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813860704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:31,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:31,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2023-11-06 22:38:31,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733494350] [2023-11-06 22:38:31,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:31,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-06 22:38:31,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-06 22:38:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2023-11-06 22:38:31,647 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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 22:38:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:32,187 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2023-11-06 22:38:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-06 22:38:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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 116 [2023-11-06 22:38:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:32,188 INFO L225 Difference]: With dead ends: 128 [2023-11-06 22:38:32,188 INFO L226 Difference]: Without dead ends: 126 [2023-11-06 22:38:32,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 201 SyntacticMatches, 56 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1429, Invalid=2477, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 22:38:32,189 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:32,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:32,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-06 22:38:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-11-06 22:38:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 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 22:38:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-11-06 22:38:32,221 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-11-06 22:38:32,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:32,222 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-11-06 22:38:32,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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 22:38:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-11-06 22:38:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-06 22:38:32,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:32,223 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:32,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-06 22:38:32,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:32,428 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:32,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:32,429 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2023-11-06 22:38:32,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:32,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780842072] [2023-11-06 22:38:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:32,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:34,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:34,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780842072] [2023-11-06 22:38:34,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780842072] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:34,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804808717] [2023-11-06 22:38:34,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:38:34,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:34,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:34,055 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:34,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-06 22:38:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:34,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-06 22:38:34,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:34,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:35,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804808717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:35,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:35,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2023-11-06 22:38:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61584534] [2023-11-06 22:38:35,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-06 22:38:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-06 22:38:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 22:38:35,601 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 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 22:38:36,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:36,679 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-11-06 22:38:36,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-06 22:38:36,679 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 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 119 [2023-11-06 22:38:36,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:36,680 INFO L225 Difference]: With dead ends: 212 [2023-11-06 22:38:36,680 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 22:38:36,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 179 SyntacticMatches, 58 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3149 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2023-11-06 22:38:36,682 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:36,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 249 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 22:38:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-06 22:38:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 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 22:38:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-11-06 22:38:36,715 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-11-06 22:38:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:36,715 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-11-06 22:38:36,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 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 22:38:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-11-06 22:38:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-06 22:38:36,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:36,716 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:36,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:36,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:36,922 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:36,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:36,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2023-11-06 22:38:36,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:36,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593814128] [2023-11-06 22:38:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:37,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593814128] [2023-11-06 22:38:37,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593814128] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:37,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383008250] [2023-11-06 22:38:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:38:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:37,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:37,921 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:37,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-06 22:38:38,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:38:38,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:38,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:38:38,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:38,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:39,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383008250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:39,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:39,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2023-11-06 22:38:39,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876417471] [2023-11-06 22:38:39,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:39,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 22:38:39,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:39,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 22:38:39,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:38:39,135 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 22:38:39,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:39,714 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2023-11-06 22:38:39,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-06 22:38:39,715 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 120 [2023-11-06 22:38:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:39,716 INFO L225 Difference]: With dead ends: 132 [2023-11-06 22:38:39,716 INFO L226 Difference]: Without dead ends: 130 [2023-11-06 22:38:39,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 208 SyntacticMatches, 58 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1523, Invalid=2637, Unknown=0, NotChecked=0, Total=4160 [2023-11-06 22:38:39,717 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:39,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 40 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-06 22:38:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2023-11-06 22:38:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 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 22:38:39,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-11-06 22:38:39,754 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-11-06 22:38:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:39,754 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-11-06 22:38:39,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 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 22:38:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-11-06 22:38:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-06 22:38:39,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:39,756 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:39,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:39,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:39,962 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:39,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2023-11-06 22:38:39,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238846156] [2023-11-06 22:38:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:41,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238846156] [2023-11-06 22:38:41,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238846156] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:41,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705229492] [2023-11-06 22:38:41,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:38:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:41,865 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:41,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-06 22:38:42,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-11-06 22:38:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:42,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-06 22:38:42,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:42,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:43,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705229492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:43,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:43,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2023-11-06 22:38:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742799850] [2023-11-06 22:38:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:43,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 22:38:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 22:38:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2023-11-06 22:38:43,532 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 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 22:38:44,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:44,714 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-11-06 22:38:44,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-06 22:38:44,714 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 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 123 [2023-11-06 22:38:44,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:44,715 INFO L225 Difference]: With dead ends: 219 [2023-11-06 22:38:44,715 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 22:38:44,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 185 SyntacticMatches, 60 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2023-11-06 22:38:44,716 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:44,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:44,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 22:38:44,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-06 22:38:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 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 22:38:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-11-06 22:38:44,750 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-11-06 22:38:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:44,750 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-11-06 22:38:44,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 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 22:38:44,751 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-11-06 22:38:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-06 22:38:44,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:44,752 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:44,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:44,957 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:44,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:44,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2023-11-06 22:38:44,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:44,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596584755] [2023-11-06 22:38:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:44,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596584755] [2023-11-06 22:38:45,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596584755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:45,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904365122] [2023-11-06 22:38:45,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:38:45,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:45,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:45,937 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:45,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-06 22:38:46,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:38:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:46,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:38:46,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:46,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:47,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904365122] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:47,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:47,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2023-11-06 22:38:47,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126784488] [2023-11-06 22:38:47,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:47,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:38:47,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:38:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:38:47,217 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 22:38:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:47,828 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2023-11-06 22:38:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-06 22:38:47,829 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 124 [2023-11-06 22:38:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:47,830 INFO L225 Difference]: With dead ends: 136 [2023-11-06 22:38:47,830 INFO L226 Difference]: Without dead ends: 134 [2023-11-06 22:38:47,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 215 SyntacticMatches, 60 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1620, Invalid=2802, Unknown=0, NotChecked=0, Total=4422 [2023-11-06 22:38:47,831 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 36 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:47,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-06 22:38:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-11-06 22:38:47,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 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 22:38:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-11-06 22:38:47,856 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-11-06 22:38:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:47,857 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-11-06 22:38:47,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 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 22:38:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-11-06 22:38:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 22:38:47,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:47,858 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:47,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:48,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-06 22:38:48,064 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:48,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2023-11-06 22:38:48,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:48,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913584834] [2023-11-06 22:38:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:49,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913584834] [2023-11-06 22:38:49,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913584834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:49,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857196614] [2023-11-06 22:38:49,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:38:49,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:49,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:49,979 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:49,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-06 22:38:50,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-11-06 22:38:50,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:50,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-06 22:38:50,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:50,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:51,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857196614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:51,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:51,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2023-11-06 22:38:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445366165] [2023-11-06 22:38:51,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-06 22:38:51,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-06 22:38:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2023-11-06 22:38:51,717 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 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 22:38:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:52,975 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-11-06 22:38:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-06 22:38:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 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 127 [2023-11-06 22:38:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:52,977 INFO L225 Difference]: With dead ends: 226 [2023-11-06 22:38:52,977 INFO L226 Difference]: Without dead ends: 129 [2023-11-06 22:38:52,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 191 SyntacticMatches, 62 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3584 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2023-11-06 22:38:52,979 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:52,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 371 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:38:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-06 22:38:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-11-06 22:38:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 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 22:38:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-11-06 22:38:53,012 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-11-06 22:38:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:53,012 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-11-06 22:38:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 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 22:38:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-11-06 22:38:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-06 22:38:53,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:53,014 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:53,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-06 22:38:53,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:53,219 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:53,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:53,220 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2023-11-06 22:38:53,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:53,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707210473] [2023-11-06 22:38:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:53,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:54,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707210473] [2023-11-06 22:38:54,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707210473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:54,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687714820] [2023-11-06 22:38:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:38:54,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:54,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:54,335 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:54,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-06 22:38:54,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-11-06 22:38:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:38:54,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:38:54,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:54,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:38:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687714820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:38:55,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:38:55,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2023-11-06 22:38:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634951497] [2023-11-06 22:38:55,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:38:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-06 22:38:55,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:38:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-06 22:38:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 22:38:55,729 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 22:38:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:38:56,359 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-11-06 22:38:56,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-06 22:38:56,360 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 128 [2023-11-06 22:38:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:38:56,361 INFO L225 Difference]: With dead ends: 140 [2023-11-06 22:38:56,361 INFO L226 Difference]: Without dead ends: 138 [2023-11-06 22:38:56,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 222 SyntacticMatches, 62 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1720, Invalid=2972, Unknown=0, NotChecked=0, Total=4692 [2023-11-06 22:38:56,362 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:38:56,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:38:56,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-06 22:38:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2023-11-06 22:38:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 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 22:38:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-11-06 22:38:56,403 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-11-06 22:38:56,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:38:56,404 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-11-06 22:38:56,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 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 22:38:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-11-06 22:38:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-06 22:38:56,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:38:56,405 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-06 22:38:56,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-06 22:38:56,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:56,605 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:38:56,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:38:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2023-11-06 22:38:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:38:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194967545] [2023-11-06 22:38:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:38:56,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:38:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:58,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:38:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194967545] [2023-11-06 22:38:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194967545] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:38:58,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098845399] [2023-11-06 22:38:58,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:38:58,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:38:58,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:38:58,606 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:38:58,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-06 22:38:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:38:58,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-06 22:38:58,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:38:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:38:58,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:00,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098845399] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:00,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:00,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2023-11-06 22:39:00,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339438049] [2023-11-06 22:39:00,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:00,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-06 22:39:00,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-06 22:39:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 22:39:00,494 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 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 22:39:01,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:01,759 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-11-06 22:39:01,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:39:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 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 131 [2023-11-06 22:39:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:01,761 INFO L225 Difference]: With dead ends: 233 [2023-11-06 22:39:01,761 INFO L226 Difference]: Without dead ends: 133 [2023-11-06 22:39:01,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 197 SyntacticMatches, 64 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3812 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2023-11-06 22:39:01,763 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:01,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 263 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-06 22:39:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-06 22:39:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 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 22:39:01,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-11-06 22:39:01,805 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-11-06 22:39:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:01,805 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-11-06 22:39:01,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 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 22:39:01,806 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-11-06 22:39:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-06 22:39:01,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:01,807 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:01,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:02,014 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:02,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2023-11-06 22:39:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416030261] [2023-11-06 22:39:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416030261] [2023-11-06 22:39:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416030261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:03,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874657355] [2023-11-06 22:39:03,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:03,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:03,225 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:03,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-06 22:39:03,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:03,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:39:03,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:03,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:04,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874657355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:04,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:04,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2023-11-06 22:39:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008403233] [2023-11-06 22:39:04,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:04,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 22:39:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 22:39:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 22:39:04,769 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 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 22:39:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:05,467 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-11-06 22:39:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 22:39:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 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 132 [2023-11-06 22:39:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:05,471 INFO L225 Difference]: With dead ends: 144 [2023-11-06 22:39:05,471 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 22:39:05,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 229 SyntacticMatches, 64 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1823, Invalid=3147, Unknown=0, NotChecked=0, Total=4970 [2023-11-06 22:39:05,473 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 22:39:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-11-06 22:39:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 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 22:39:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-11-06 22:39:05,508 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2023-11-06 22:39:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:05,508 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-11-06 22:39:05,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 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 22:39:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-11-06 22:39:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 22:39:05,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:05,510 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:05,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:05,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-11-06 22:39:05,716 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:05,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:05,716 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2023-11-06 22:39:05,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:05,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410126722] [2023-11-06 22:39:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:05,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:07,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:07,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410126722] [2023-11-06 22:39:07,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410126722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:07,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461530094] [2023-11-06 22:39:07,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:07,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:07,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:07,876 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:07,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-06 22:39:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-11-06 22:39:08,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:08,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-06 22:39:08,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:08,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:10,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461530094] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:10,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:10,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2023-11-06 22:39:10,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495166080] [2023-11-06 22:39:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:10,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-06 22:39:10,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:10,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-06 22:39:10,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2023-11-06 22:39:10,013 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 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 22:39:11,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:11,334 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-11-06 22:39:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-06 22:39:11,335 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 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 135 [2023-11-06 22:39:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:11,335 INFO L225 Difference]: With dead ends: 240 [2023-11-06 22:39:11,336 INFO L226 Difference]: Without dead ends: 137 [2023-11-06 22:39:11,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 203 SyntacticMatches, 66 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4047 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2023-11-06 22:39:11,337 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:11,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 286 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:39:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-06 22:39:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-06 22:39:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 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 22:39:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-11-06 22:39:11,369 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2023-11-06 22:39:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:11,370 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-11-06 22:39:11,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 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 22:39:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-11-06 22:39:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-06 22:39:11,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:11,371 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:11,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-11-06 22:39:11,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-11-06 22:39:11,571 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:11,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2023-11-06 22:39:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:11,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483892094] [2023-11-06 22:39:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:12,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483892094] [2023-11-06 22:39:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483892094] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052774185] [2023-11-06 22:39:12,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:12,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:12,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:12,887 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:12,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-06 22:39:13,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:13,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:39:13,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:13,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:14,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052774185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:14,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:14,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2023-11-06 22:39:14,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928121076] [2023-11-06 22:39:14,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:14,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:39:14,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:14,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:39:14,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:39:14,470 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 22:39:15,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:15,135 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2023-11-06 22:39:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-06 22:39:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 136 [2023-11-06 22:39:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:15,136 INFO L225 Difference]: With dead ends: 148 [2023-11-06 22:39:15,136 INFO L226 Difference]: Without dead ends: 146 [2023-11-06 22:39:15,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 236 SyntacticMatches, 66 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2469 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1929, Invalid=3327, Unknown=0, NotChecked=0, Total=5256 [2023-11-06 22:39:15,137 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:15,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 35 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-06 22:39:15,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-11-06 22:39:15,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 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 22:39:15,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-11-06 22:39:15,176 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2023-11-06 22:39:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:15,176 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-11-06 22:39:15,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 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 22:39:15,177 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-11-06 22:39:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-06 22:39:15,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:15,178 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:15,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:15,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-06 22:39:15,384 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:15,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2023-11-06 22:39:15,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:15,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743382932] [2023-11-06 22:39:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:15,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:17,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:17,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743382932] [2023-11-06 22:39:17,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743382932] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:17,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096171550] [2023-11-06 22:39:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:17,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:17,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:17,677 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:17,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-06 22:39:17,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-11-06 22:39:17,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:17,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-06 22:39:17,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:18,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096171550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:19,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:19,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2023-11-06 22:39:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760545431] [2023-11-06 22:39:19,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:19,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-06 22:39:19,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:19,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-06 22:39:19,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2023-11-06 22:39:19,910 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 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 22:39:21,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:21,342 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2023-11-06 22:39:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-06 22:39:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 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 139 [2023-11-06 22:39:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:21,343 INFO L225 Difference]: With dead ends: 247 [2023-11-06 22:39:21,343 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 22:39:21,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 209 SyntacticMatches, 68 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4289 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2023-11-06 22:39:21,345 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:21,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 331 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:39:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 22:39:21,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-11-06 22:39:21,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 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 22:39:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-11-06 22:39:21,397 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-11-06 22:39:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:21,397 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-11-06 22:39:21,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 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 22:39:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-11-06 22:39:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-06 22:39:21,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:21,398 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:21,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:21,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-06 22:39:21,599 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:21,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:21,599 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2023-11-06 22:39:21,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:21,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705132453] [2023-11-06 22:39:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:21,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:22,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705132453] [2023-11-06 22:39:22,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705132453] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:22,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040359708] [2023-11-06 22:39:22,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:39:22,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:22,905 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:22,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-06 22:39:23,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-11-06 22:39:23,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:23,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:39:23,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:23,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:24,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040359708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:24,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2023-11-06 22:39:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021438813] [2023-11-06 22:39:24,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:24,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 22:39:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:24,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 22:39:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 22:39:24,530 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 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 22:39:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:25,343 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2023-11-06 22:39:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-06 22:39:25,344 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 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 140 [2023-11-06 22:39:25,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:25,345 INFO L225 Difference]: With dead ends: 152 [2023-11-06 22:39:25,345 INFO L226 Difference]: Without dead ends: 150 [2023-11-06 22:39:25,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 243 SyntacticMatches, 68 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2612 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2038, Invalid=3512, Unknown=0, NotChecked=0, Total=5550 [2023-11-06 22:39:25,346 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 76 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:25,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 31 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-06 22:39:25,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2023-11-06 22:39:25,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 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 22:39:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-11-06 22:39:25,375 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-11-06 22:39:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:25,375 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-11-06 22:39:25,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 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 22:39:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-11-06 22:39:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-06 22:39:25,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:25,376 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:25,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2023-11-06 22:39:25,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-06 22:39:25,577 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:25,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2023-11-06 22:39:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115521267] [2023-11-06 22:39:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:25,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:27,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:27,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115521267] [2023-11-06 22:39:27,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115521267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:27,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884422385] [2023-11-06 22:39:27,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:39:27,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:27,889 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:27,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-06 22:39:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:28,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-06 22:39:28,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:28,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:28,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:29,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884422385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:29,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:29,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 74 [2023-11-06 22:39:29,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262706263] [2023-11-06 22:39:29,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:29,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 22:39:29,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:29,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 22:39:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2023-11-06 22:39:29,971 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 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 22:39:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:31,571 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2023-11-06 22:39:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-06 22:39:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 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 143 [2023-11-06 22:39:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:31,572 INFO L225 Difference]: With dead ends: 254 [2023-11-06 22:39:31,572 INFO L226 Difference]: Without dead ends: 145 [2023-11-06 22:39:31,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 215 SyntacticMatches, 70 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4538 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2774, Invalid=9216, Unknown=0, NotChecked=0, Total=11990 [2023-11-06 22:39:31,575 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:31,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 374 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:39:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-06 22:39:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-11-06 22:39:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 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 22:39:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-11-06 22:39:31,623 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-11-06 22:39:31,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:31,623 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-11-06 22:39:31,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 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 22:39:31,641 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-11-06 22:39:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-06 22:39:31,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:31,642 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:31,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:31,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-06 22:39:31,849 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:31,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:31,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2023-11-06 22:39:31,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:31,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741916823] [2023-11-06 22:39:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:31,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741916823] [2023-11-06 22:39:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741916823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034774861] [2023-11-06 22:39:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:39:33,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:33,307 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:33,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-06 22:39:33,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:39:33,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:33,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:39:33,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:33,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:34,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:34,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034774861] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:34,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:34,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2023-11-06 22:39:34,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652457176] [2023-11-06 22:39:34,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:34,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:39:34,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:39:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:39:34,922 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 22:39:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:35,638 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2023-11-06 22:39:35,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-06 22:39:35,639 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 144 [2023-11-06 22:39:35,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:35,640 INFO L225 Difference]: With dead ends: 156 [2023-11-06 22:39:35,640 INFO L226 Difference]: Without dead ends: 154 [2023-11-06 22:39:35,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 250 SyntacticMatches, 70 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2759 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2150, Invalid=3702, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 22:39:35,641 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:35,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 35 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:35,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-06 22:39:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-11-06 22:39:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 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 22:39:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-11-06 22:39:35,676 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-11-06 22:39:35,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:35,677 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-11-06 22:39:35,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 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 22:39:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-11-06 22:39:35,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-06 22:39:35,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:35,678 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:35,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-11-06 22:39:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:35,885 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:35,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2023-11-06 22:39:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:35,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658535646] [2023-11-06 22:39:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:35,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658535646] [2023-11-06 22:39:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658535646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006191413] [2023-11-06 22:39:38,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:39:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:38,442 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:38,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-06 22:39:38,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2023-11-06 22:39:38,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:38,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:39:38,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:38,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006191413] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:40,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:40,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 76 [2023-11-06 22:39:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124736840] [2023-11-06 22:39:40,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-06 22:39:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-06 22:39:40,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2023-11-06 22:39:40,890 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 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 22:39:42,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:42,419 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2023-11-06 22:39:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-06 22:39:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 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 147 [2023-11-06 22:39:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:42,420 INFO L225 Difference]: With dead ends: 261 [2023-11-06 22:39:42,420 INFO L226 Difference]: Without dead ends: 149 [2023-11-06 22:39:42,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 221 SyntacticMatches, 72 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4794 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2925, Invalid=9731, Unknown=0, NotChecked=0, Total=12656 [2023-11-06 22:39:42,421 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:42,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 324 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:39:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-11-06 22:39:42,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-11-06 22:39:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 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 22:39:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-11-06 22:39:42,462 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-11-06 22:39:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:42,462 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-11-06 22:39:42,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 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 22:39:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-11-06 22:39:42,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-06 22:39:42,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:42,463 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:42,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-11-06 22:39:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:42,663 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:42,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:42,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2023-11-06 22:39:42,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:42,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282543286] [2023-11-06 22:39:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:42,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:44,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282543286] [2023-11-06 22:39:44,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282543286] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:44,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764590182] [2023-11-06 22:39:44,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:39:44,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:44,055 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:44,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-06 22:39:44,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:39:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:44,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 22:39:44,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:44,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:45,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764590182] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:45,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2023-11-06 22:39:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946335121] [2023-11-06 22:39:45,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-06 22:39:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:45,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-06 22:39:45,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:39:45,791 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 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 22:39:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:46,543 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2023-11-06 22:39:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-06 22:39:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 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 148 [2023-11-06 22:39:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:46,545 INFO L225 Difference]: With dead ends: 160 [2023-11-06 22:39:46,545 INFO L226 Difference]: Without dead ends: 158 [2023-11-06 22:39:46,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 257 SyntacticMatches, 72 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2265, Invalid=3897, Unknown=0, NotChecked=0, Total=6162 [2023-11-06 22:39:46,546 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:46,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 39 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-06 22:39:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2023-11-06 22:39:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 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 22:39:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-11-06 22:39:46,587 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-11-06 22:39:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:46,588 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-11-06 22:39:46,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 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 22:39:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-11-06 22:39:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-06 22:39:46,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:46,589 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:46,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-11-06 22:39:46,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2023-11-06 22:39:46,789 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:46,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2023-11-06 22:39:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988693235] [2023-11-06 22:39:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:49,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988693235] [2023-11-06 22:39:49,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988693235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546116386] [2023-11-06 22:39:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:39:49,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:49,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:49,376 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:49,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-06 22:39:49,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-11-06 22:39:49,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:49,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-06 22:39:49,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:49,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:51,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546116386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:51,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:51,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 78 [2023-11-06 22:39:51,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281572245] [2023-11-06 22:39:51,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:51,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-06 22:39:51,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:51,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-06 22:39:51,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2023-11-06 22:39:51,945 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 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 22:39:53,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:53,502 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2023-11-06 22:39:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-06 22:39:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 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 151 [2023-11-06 22:39:53,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:53,503 INFO L225 Difference]: With dead ends: 268 [2023-11-06 22:39:53,503 INFO L226 Difference]: Without dead ends: 153 [2023-11-06 22:39:53,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 227 SyntacticMatches, 74 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5057 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3080, Invalid=10260, Unknown=0, NotChecked=0, Total=13340 [2023-11-06 22:39:53,504 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:53,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 299 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:39:53,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-06 22:39:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-11-06 22:39:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 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 22:39:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-11-06 22:39:53,550 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-11-06 22:39:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:53,550 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-11-06 22:39:53,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 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 22:39:53,550 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-11-06 22:39:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-06 22:39:53,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:53,551 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:53,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-11-06 22:39:53,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:53,752 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:53,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2023-11-06 22:39:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:53,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74468580] [2023-11-06 22:39:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:39:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:39:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74468580] [2023-11-06 22:39:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74468580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:39:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712770683] [2023-11-06 22:39:55,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:39:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:39:55,475 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:39:55,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-06 22:39:55,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-11-06 22:39:55,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:39:55,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-06 22:39:55,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:39:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:55,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:39:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:39:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712770683] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:39:57,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:39:57,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2023-11-06 22:39:57,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926374768] [2023-11-06 22:39:57,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:39:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-06 22:39:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:39:57,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-06 22:39:57,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2023-11-06 22:39:57,367 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:39:58,169 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2023-11-06 22:39:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-06 22:39:58,170 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2023-11-06 22:39:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:39:58,171 INFO L225 Difference]: With dead ends: 164 [2023-11-06 22:39:58,171 INFO L226 Difference]: Without dead ends: 162 [2023-11-06 22:39:58,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 264 SyntacticMatches, 74 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3065 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2383, Invalid=4097, Unknown=0, NotChecked=0, Total=6480 [2023-11-06 22:39:58,172 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:39:58,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:39:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-06 22:39:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2023-11-06 22:39:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 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 22:39:58,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-11-06 22:39:58,227 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2023-11-06 22:39:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:39:58,227 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-11-06 22:39:58,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:39:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-11-06 22:39:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-06 22:39:58,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:39:58,229 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2023-11-06 22:39:58,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-11-06 22:39:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:39:58,435 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:39:58,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:39:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2023-11-06 22:39:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:39:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732128569] [2023-11-06 22:39:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:39:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:39:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:01,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:01,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732128569] [2023-11-06 22:40:01,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732128569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:01,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981586594] [2023-11-06 22:40:01,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:40:01,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:01,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:01,298 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:01,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-06 22:40:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:01,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-06 22:40:01,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:01,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:40:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:03,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981586594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:40:03,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:40:03,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 80 [2023-11-06 22:40:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948613029] [2023-11-06 22:40:03,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:40:03,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-06 22:40:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:40:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-06 22:40:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2023-11-06 22:40:03,794 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 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 22:40:05,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:40:05,470 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2023-11-06 22:40:05,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-06 22:40:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 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 155 [2023-11-06 22:40:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:40:05,472 INFO L225 Difference]: With dead ends: 275 [2023-11-06 22:40:05,472 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 22:40:05,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 233 SyntacticMatches, 76 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5327 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3239, Invalid=10803, Unknown=0, NotChecked=0, Total=14042 [2023-11-06 22:40:05,473 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:40:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 333 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:40:05,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 22:40:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-11-06 22:40:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:40:05,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2023-11-06 22:40:05,523 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2023-11-06 22:40:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:40:05,523 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2023-11-06 22:40:05,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 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 22:40:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2023-11-06 22:40:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-06 22:40:05,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:40:05,525 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-11-06 22:40:05,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2023-11-06 22:40:05,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:05,730 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:40:05,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:40:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2023-11-06 22:40:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:40:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908010997] [2023-11-06 22:40:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:40:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:40:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:40:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:07,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:40:07,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908010997] [2023-11-06 22:40:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908010997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:40:07,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251343718] [2023-11-06 22:40:07,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:40:07,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:40:07,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:40:07,345 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:40:07,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d4926c3-a629-49f8-892b-c5da3d50ba4b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-06 22:40:07,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:40:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:40:07,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-06 22:40:07,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:40:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:40:07,680 INFO L327 TraceCheckSpWp]: Computing backward predicates...