./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/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_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/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_fb1080cb-002b-47dd-acc9-88fc5110343b/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 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:30:24,759 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:30:24,898 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:30:24,904 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:30:24,910 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:30:24,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:30:24,962 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:30:24,963 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:30:24,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:30:24,965 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:30:24,966 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:30:24,968 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:30:24,968 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:30:24,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:30:24,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:30:24,973 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:30:24,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:30:24,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:30:24,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:30:24,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:30:24,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:30:24,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:30:24,982 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:30:24,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:30:24,983 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:30:24,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:30:24,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:30:24,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:30:24,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:24,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:30:24,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:30:24,986 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:30:24,986 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:30:24,987 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:30:24,987 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:30:24,987 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:30:24,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:30:24,988 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:30:24,988 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:30:24,989 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_fb1080cb-002b-47dd-acc9-88fc5110343b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 [2023-11-06 22:30:25,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:30:25,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:30:25,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:30:25,293 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:30:25,294 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:30:25,296 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-11-06 22:30:28,468 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:30:29,075 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:30:29,076 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2023-11-06 22:30:29,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/data/434ca2de6/1221b2705a294e71a0eb3a7adc269366/FLAGaf53ec491 [2023-11-06 22:30:29,136 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/data/434ca2de6/1221b2705a294e71a0eb3a7adc269366 [2023-11-06 22:30:29,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:30:29,147 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:30:29,149 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:29,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:30:29,155 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:30:29,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:29" (1/1) ... [2023-11-06 22:30:29,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44134f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:29, skipping insertion in model container [2023-11-06 22:30:29,157 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:29" (1/1) ... [2023-11-06 22:30:29,330 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:30:29,612 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_fb1080cb-002b-47dd-acc9-88fc5110343b/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-11-06 22:30:30,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:30,849 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:30:30,877 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_fb1080cb-002b-47dd-acc9-88fc5110343b/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2023-11-06 22:30:31,611 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:30:31,647 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:30:31,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31 WrapperNode [2023-11-06 22:30:31,648 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:30:31,649 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:31,649 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:30:31,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:30:31,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:31,728 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:32,383 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-06 22:30:32,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:30:32,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:30:32,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:30:32,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:30:32,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:32,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:32,583 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:32,586 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,098 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,212 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:30:33,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:30:33,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:30:33,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:30:33,215 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (1/1) ... [2023-11-06 22:30:33,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:30:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:30:33,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:30:33,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:30:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:30:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:30:33,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:30:33,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:30:33,375 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:30:33,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:30:40,214 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:30:40,232 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:30:40,232 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:30:40,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:40 BoogieIcfgContainer [2023-11-06 22:30:40,237 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:30:40,240 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:30:40,241 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:30:40,244 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:30:40,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:29" (1/3) ... [2023-11-06 22:30:40,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@926f84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:40, skipping insertion in model container [2023-11-06 22:30:40,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:31" (2/3) ... [2023-11-06 22:30:40,246 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@926f84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:40, skipping insertion in model container [2023-11-06 22:30:40,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:40" (3/3) ... [2023-11-06 22:30:40,247 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2023-11-06 22:30:40,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:30:40,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:30:40,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:30:40,388 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;@1588aca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:30:40,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:30:40,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:30:40,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:40,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:40,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:40,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2023-11-06 22:30:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:40,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654031876] [2023-11-06 22:30:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:40,798 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 22:30:40,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:40,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654031876] [2023-11-06 22:30:40,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654031876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:40,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:40,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:30:40,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130043722] [2023-11-06 22:30:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:40,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:40,862 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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 22:30:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:46,549 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2023-11-06 22:30:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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) Word has length 22 [2023-11-06 22:30:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:46,579 INFO L225 Difference]: With dead ends: 3035 [2023-11-06 22:30:46,579 INFO L226 Difference]: Without dead ends: 1873 [2023-11-06 22:30:46,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:46,593 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 883 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:46,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-06 22:30:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2023-11-06 22:30:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2023-11-06 22:30:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2023-11-06 22:30:46,745 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 22 [2023-11-06 22:30:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:46,746 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2023-11-06 22:30:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 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 22:30:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2023-11-06 22:30:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-06 22:30:46,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:46,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:30:46,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:46,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 209102453, now seen corresponding path program 1 times [2023-11-06 22:30:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:46,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322940291] [2023-11-06 22:30:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:47,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:47,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322940291] [2023-11-06 22:30:47,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322940291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:47,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:47,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:30:47,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826241165] [2023-11-06 22:30:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:47,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:30:47,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:30:47,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:47,060 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 22:30:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:30:52,519 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2023-11-06 22:30:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:30:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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) Word has length 94 [2023-11-06 22:30:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:30:52,542 INFO L225 Difference]: With dead ends: 5317 [2023-11-06 22:30:52,542 INFO L226 Difference]: Without dead ends: 3460 [2023-11-06 22:30:52,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:30:52,547 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:30:52,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-06 22:30:52,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2023-11-06 22:30:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2023-11-06 22:30:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:30:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2023-11-06 22:30:52,633 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 94 [2023-11-06 22:30:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:30:52,634 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2023-11-06 22:30:52,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 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 22:30:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2023-11-06 22:30:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-06 22:30:52,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:30:52,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:30:52,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:30:52,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:30:52,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:30:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash 169265708, now seen corresponding path program 1 times [2023-11-06 22:30:52,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:30:52,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660618559] [2023-11-06 22:30:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:30:52,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:30:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:30:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:30:53,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:30:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660618559] [2023-11-06 22:30:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660618559] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:30:53,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:30:53,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:30:53,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362214630] [2023-11-06 22:30:53,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:30:53,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:30:53,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:30:53,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:30:53,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:30:53,194 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 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 22:31:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:00,006 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2023-11-06 22:31:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:31:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 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 108 [2023-11-06 22:31:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:00,054 INFO L225 Difference]: With dead ends: 10870 [2023-11-06 22:31:00,054 INFO L226 Difference]: Without dead ends: 7413 [2023-11-06 22:31:00,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:31:00,066 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2582 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 1003 Invalid, 4948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-11-06 22:31:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2023-11-06 22:31:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2023-11-06 22:31:00,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2023-11-06 22:31:00,261 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 108 [2023-11-06 22:31:00,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:00,265 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2023-11-06 22:31:00,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 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 22:31:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2023-11-06 22:31:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-06 22:31:00,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:00,281 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:00,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:31:00,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:00,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash 500012194, now seen corresponding path program 1 times [2023-11-06 22:31:00,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:00,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368657822] [2023-11-06 22:31:00,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:00,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 22:31:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368657822] [2023-11-06 22:31:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368657822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:00,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:31:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103084013] [2023-11-06 22:31:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:00,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:00,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:00,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:00,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:00,639 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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 22:31:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:05,659 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2023-11-06 22:31:05,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:05,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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 189 [2023-11-06 22:31:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:05,717 INFO L225 Difference]: With dead ends: 20355 [2023-11-06 22:31:05,717 INFO L226 Difference]: Without dead ends: 13732 [2023-11-06 22:31:05,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:05,729 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:05,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-06 22:31:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2023-11-06 22:31:05,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2023-11-06 22:31:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2023-11-06 22:31:06,049 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 189 [2023-11-06 22:31:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:06,051 INFO L495 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2023-11-06 22:31:06,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 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 22:31:06,052 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2023-11-06 22:31:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-06 22:31:06,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:06,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:06,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:31:06,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:06,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1787709102, now seen corresponding path program 1 times [2023-11-06 22:31:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:06,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374100668] [2023-11-06 22:31:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:31:06,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:06,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374100668] [2023-11-06 22:31:06,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374100668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:06,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:06,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:31:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509181256] [2023-11-06 22:31:06,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:06,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:06,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:06,385 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:11,066 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2023-11-06 22:31:11,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:11,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2023-11-06 22:31:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:11,112 INFO L225 Difference]: With dead ends: 31392 [2023-11-06 22:31:11,113 INFO L226 Difference]: Without dead ends: 19244 [2023-11-06 22:31:11,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:11,129 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:11,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-06 22:31:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2023-11-06 22:31:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2023-11-06 22:31:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2023-11-06 22:31:11,486 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 221 [2023-11-06 22:31:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:11,487 INFO L495 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2023-11-06 22:31:11,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2023-11-06 22:31:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:31:11,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:11,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:11,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:31:11,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:11,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:11,497 INFO L85 PathProgramCache]: Analyzing trace with hash 947672488, now seen corresponding path program 1 times [2023-11-06 22:31:11,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:11,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532936522] [2023-11-06 22:31:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:11,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-06 22:31:12,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:12,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532936522] [2023-11-06 22:31:12,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532936522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:12,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:12,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:31:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058090679] [2023-11-06 22:31:12,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:12,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:12,288 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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 22:31:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:18,216 INFO L93 Difference]: Finished difference Result 52772 states and 63784 transitions. [2023-11-06 22:31:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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 310 [2023-11-06 22:31:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:18,299 INFO L225 Difference]: With dead ends: 52772 [2023-11-06 22:31:18,299 INFO L226 Difference]: Without dead ends: 35114 [2023-11-06 22:31:18,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:18,442 INFO L413 NwaCegarLoop]: 1700 mSDtfsCounter, 951 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:18,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1819 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-06 22:31:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35114 states. [2023-11-06 22:31:18,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35114 to 34274. [2023-11-06 22:31:18,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34274 states, 34273 states have (on average 1.1858897674554314) internal successors, (40644), 34273 states have internal predecessors, (40644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34274 states to 34274 states and 40644 transitions. [2023-11-06 22:31:19,002 INFO L78 Accepts]: Start accepts. Automaton has 34274 states and 40644 transitions. Word has length 310 [2023-11-06 22:31:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:19,003 INFO L495 AbstractCegarLoop]: Abstraction has 34274 states and 40644 transitions. [2023-11-06 22:31:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 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 22:31:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 34274 states and 40644 transitions. [2023-11-06 22:31:19,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-11-06 22:31:19,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:19,016 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:31:19,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:19,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:19,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1734427868, now seen corresponding path program 1 times [2023-11-06 22:31:19,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448172767] [2023-11-06 22:31:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:19,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 22:31:19,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:19,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448172767] [2023-11-06 22:31:19,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448172767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:19,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:19,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:31:19,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108994082] [2023-11-06 22:31:19,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:19,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:31:19,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:31:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:31:19,405 INFO L87 Difference]: Start difference. First operand 34274 states and 40644 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:29,574 INFO L93 Difference]: Finished difference Result 108144 states and 129355 transitions. [2023-11-06 22:31:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:31:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 310 [2023-11-06 22:31:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:29,719 INFO L225 Difference]: With dead ends: 108144 [2023-11-06 22:31:29,719 INFO L226 Difference]: Without dead ends: 74659 [2023-11-06 22:31:29,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:31:29,757 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 1727 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 6796 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 6796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:29,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 846 Invalid, 7881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 6796 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2023-11-06 22:31:29,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74659 states. [2023-11-06 22:31:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74659 to 74498. [2023-11-06 22:31:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74498 states, 74497 states have (on average 1.170892787629032) internal successors, (87228), 74497 states have internal predecessors, (87228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74498 states to 74498 states and 87228 transitions. [2023-11-06 22:31:31,110 INFO L78 Accepts]: Start accepts. Automaton has 74498 states and 87228 transitions. Word has length 310 [2023-11-06 22:31:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:31,111 INFO L495 AbstractCegarLoop]: Abstraction has 74498 states and 87228 transitions. [2023-11-06 22:31:31,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 74498 states and 87228 transitions. [2023-11-06 22:31:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2023-11-06 22:31:31,120 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:31,121 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:31,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:31:31,121 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:31,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:31,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2097221119, now seen corresponding path program 1 times [2023-11-06 22:31:31,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:31,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351890701] [2023-11-06 22:31:31,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:31,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-06 22:31:32,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:32,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351890701] [2023-11-06 22:31:32,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351890701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:32,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:32,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:31:32,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490514626] [2023-11-06 22:31:32,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:32,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:32,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:32,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:32,174 INFO L87 Difference]: Start difference. First operand 74498 states and 87228 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:37,570 INFO L93 Difference]: Finished difference Result 160034 states and 187017 transitions. [2023-11-06 22:31:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 348 [2023-11-06 22:31:37,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:37,834 INFO L225 Difference]: With dead ends: 160034 [2023-11-06 22:31:37,834 INFO L226 Difference]: Without dead ends: 86325 [2023-11-06 22:31:37,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:37,895 INFO L413 NwaCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:37,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-06 22:31:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86325 states. [2023-11-06 22:31:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86325 to 86316. [2023-11-06 22:31:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86316 states, 86315 states have (on average 1.1568672884203208) internal successors, (99855), 86315 states have internal predecessors, (99855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86316 states to 86316 states and 99855 transitions. [2023-11-06 22:31:39,587 INFO L78 Accepts]: Start accepts. Automaton has 86316 states and 99855 transitions. Word has length 348 [2023-11-06 22:31:39,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:39,588 INFO L495 AbstractCegarLoop]: Abstraction has 86316 states and 99855 transitions. [2023-11-06 22:31:39,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:39,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86316 states and 99855 transitions. [2023-11-06 22:31:39,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2023-11-06 22:31:39,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:39,599 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:39,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:31:39,600 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:39,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:39,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2065811671, now seen corresponding path program 1 times [2023-11-06 22:31:39,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:39,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725096939] [2023-11-06 22:31:39,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:39,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 22:31:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725096939] [2023-11-06 22:31:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725096939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:31:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107691872] [2023-11-06 22:31:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:42,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:31:42,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:31:42,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:31:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:42,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:31:42,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:31:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2023-11-06 22:31:42,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:31:42,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107691872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:42,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:31:42,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 22:31:42,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294128931] [2023-11-06 22:31:42,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:42,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:42,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:42,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:31:42,718 INFO L87 Difference]: Start difference. First operand 86316 states and 99855 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:47,683 INFO L93 Difference]: Finished difference Result 171840 states and 198914 transitions. [2023-11-06 22:31:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:47,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 377 [2023-11-06 22:31:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:47,793 INFO L225 Difference]: With dead ends: 171840 [2023-11-06 22:31:47,794 INFO L226 Difference]: Without dead ends: 86313 [2023-11-06 22:31:47,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:31:47,833 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 1094 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:47,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1446 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 22:31:47,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86313 states. [2023-11-06 22:31:48,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86313 to 86311. [2023-11-06 22:31:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86311 states, 86310 states have (on average 1.1199397520565404) internal successors, (96662), 86310 states have internal predecessors, (96662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:49,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86311 states to 86311 states and 96662 transitions. [2023-11-06 22:31:49,327 INFO L78 Accepts]: Start accepts. Automaton has 86311 states and 96662 transitions. Word has length 377 [2023-11-06 22:31:49,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:49,328 INFO L495 AbstractCegarLoop]: Abstraction has 86311 states and 96662 transitions. [2023-11-06 22:31:49,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:49,328 INFO L276 IsEmpty]: Start isEmpty. Operand 86311 states and 96662 transitions. [2023-11-06 22:31:49,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2023-11-06 22:31:49,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:49,341 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:49,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:31:49,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:31:49,548 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:49,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:49,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2022662319, now seen corresponding path program 1 times [2023-11-06 22:31:49,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:49,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464237431] [2023-11-06 22:31:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:49,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:31:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2023-11-06 22:31:50,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:31:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464237431] [2023-11-06 22:31:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464237431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:31:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:31:50,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:31:50,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212422309] [2023-11-06 22:31:50,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:31:50,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:31:50,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:31:50,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:31:50,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:50,025 INFO L87 Difference]: Start difference. First operand 86311 states and 96662 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:31:56,120 INFO L93 Difference]: Finished difference Result 198608 states and 224799 transitions. [2023-11-06 22:31:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:31:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 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 378 [2023-11-06 22:31:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:31:56,256 INFO L225 Difference]: With dead ends: 198608 [2023-11-06 22:31:56,256 INFO L226 Difference]: Without dead ends: 113086 [2023-11-06 22:31:56,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:31:56,288 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 899 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:31:56,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 913 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 22:31:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113086 states. [2023-11-06 22:31:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113086 to 111491. [2023-11-06 22:31:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111491 states, 111490 states have (on average 1.1249977576464256) internal successors, (125426), 111490 states have internal predecessors, (125426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:57,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111491 states to 111491 states and 125426 transitions. [2023-11-06 22:31:57,986 INFO L78 Accepts]: Start accepts. Automaton has 111491 states and 125426 transitions. Word has length 378 [2023-11-06 22:31:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:31:57,987 INFO L495 AbstractCegarLoop]: Abstraction has 111491 states and 125426 transitions. [2023-11-06 22:31:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:31:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 111491 states and 125426 transitions. [2023-11-06 22:31:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:31:58,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:31:58,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:31:58,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:31:58,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:31:58,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:31:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash -351823286, now seen corresponding path program 1 times [2023-11-06 22:31:58,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:31:58,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145054213] [2023-11-06 22:31:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:31:58,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:31:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 277 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 22:32:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145054213] [2023-11-06 22:32:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145054213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:00,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477092003] [2023-11-06 22:32:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:00,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:00,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:00,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:32:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:00,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:32:00,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-06 22:32:01,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:01,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477092003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:01,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 22:32:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396766717] [2023-11-06 22:32:01,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:01,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:32:01,218 INFO L87 Difference]: Start difference. First operand 111491 states and 125426 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:07,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:07,022 INFO L93 Difference]: Finished difference Result 217428 states and 246761 transitions. [2023-11-06 22:32:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:07,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 452 [2023-11-06 22:32:07,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:07,169 INFO L225 Difference]: With dead ends: 217428 [2023-11-06 22:32:07,170 INFO L226 Difference]: Without dead ends: 122475 [2023-11-06 22:32:07,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:32:07,199 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:07,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 411 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 22:32:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122475 states. [2023-11-06 22:32:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122475 to 122473. [2023-11-06 22:32:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122473 states, 122472 states have (on average 1.1164102815337382) internal successors, (136729), 122472 states have internal predecessors, (136729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122473 states to 122473 states and 136729 transitions. [2023-11-06 22:32:09,166 INFO L78 Accepts]: Start accepts. Automaton has 122473 states and 136729 transitions. Word has length 452 [2023-11-06 22:32:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:09,167 INFO L495 AbstractCegarLoop]: Abstraction has 122473 states and 136729 transitions. [2023-11-06 22:32:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 122473 states and 136729 transitions. [2023-11-06 22:32:09,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-06 22:32:09,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:09,186 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:09,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:32:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:32:09,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:32:09,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -361499736, now seen corresponding path program 1 times [2023-11-06 22:32:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:09,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332419692] [2023-11-06 22:32:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-06 22:32:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:09,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332419692] [2023-11-06 22:32:09,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332419692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:09,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:09,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:32:09,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379464368] [2023-11-06 22:32:09,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:09,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:09,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:09,952 INFO L87 Difference]: Start difference. First operand 122473 states and 136729 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:16,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:16,368 INFO L93 Difference]: Finished difference Result 266986 states and 299855 transitions. [2023-11-06 22:32:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 470 [2023-11-06 22:32:16,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:16,582 INFO L225 Difference]: With dead ends: 266986 [2023-11-06 22:32:16,582 INFO L226 Difference]: Without dead ends: 145302 [2023-11-06 22:32:16,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:16,629 INFO L413 NwaCegarLoop]: 1755 mSDtfsCounter, 723 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:16,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1899 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 22:32:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145302 states. [2023-11-06 22:32:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145302 to 141346. [2023-11-06 22:32:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141346 states, 141345 states have (on average 1.101213343238176) internal successors, (155651), 141345 states have internal predecessors, (155651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141346 states to 141346 states and 155651 transitions. [2023-11-06 22:32:18,942 INFO L78 Accepts]: Start accepts. Automaton has 141346 states and 155651 transitions. Word has length 470 [2023-11-06 22:32:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:18,942 INFO L495 AbstractCegarLoop]: Abstraction has 141346 states and 155651 transitions. [2023-11-06 22:32:18,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:18,943 INFO L276 IsEmpty]: Start isEmpty. Operand 141346 states and 155651 transitions. [2023-11-06 22:32:18,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2023-11-06 22:32:18,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:18,968 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:18,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 22:32:18,968 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:32:18,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:18,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1002493065, now seen corresponding path program 1 times [2023-11-06 22:32:18,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:18,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695578695] [2023-11-06 22:32:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:18,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 351 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 22:32:21,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695578695] [2023-11-06 22:32:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695578695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284931899] [2023-11-06 22:32:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:21,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:21,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:21,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:32:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:21,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:32:21,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-11-06 22:32:23,077 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284931899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:23,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:23,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-06 22:32:23,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650113483] [2023-11-06 22:32:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:23,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:23,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:32:23,087 INFO L87 Difference]: Start difference. First operand 141346 states and 155651 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:27,849 INFO L93 Difference]: Finished difference Result 267743 states and 295781 transitions. [2023-11-06 22:32:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 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 583 [2023-11-06 22:32:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:27,996 INFO L225 Difference]: With dead ends: 267743 [2023-11-06 22:32:27,996 INFO L226 Difference]: Without dead ends: 145296 [2023-11-06 22:32:28,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:32:28,042 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:28,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1142 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-06 22:32:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145296 states. [2023-11-06 22:32:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145296 to 145287. [2023-11-06 22:32:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145287 states, 145286 states have (on average 1.099534710846193) internal successors, (159747), 145286 states have internal predecessors, (159747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145287 states to 145287 states and 159747 transitions. [2023-11-06 22:32:30,172 INFO L78 Accepts]: Start accepts. Automaton has 145287 states and 159747 transitions. Word has length 583 [2023-11-06 22:32:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:30,172 INFO L495 AbstractCegarLoop]: Abstraction has 145287 states and 159747 transitions. [2023-11-06 22:32:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 145287 states and 159747 transitions. [2023-11-06 22:32:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2023-11-06 22:32:30,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:30,201 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:30,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:32:30,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:32:30,402 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:32:30,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash 527317633, now seen corresponding path program 1 times [2023-11-06 22:32:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334504465] [2023-11-06 22:32:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2023-11-06 22:32:30,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:30,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334504465] [2023-11-06 22:32:30,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334504465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:30,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:32:30,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:32:30,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239729243] [2023-11-06 22:32:30,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:32:30,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:30,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:32:30,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:30,788 INFO L87 Difference]: Start difference. First operand 145287 states and 159747 transitions. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:36,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:32:36,577 INFO L93 Difference]: Finished difference Result 299991 states and 329054 transitions. [2023-11-06 22:32:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:32:36,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 636 [2023-11-06 22:32:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:32:36,794 INFO L225 Difference]: With dead ends: 299991 [2023-11-06 22:32:36,794 INFO L226 Difference]: Without dead ends: 149194 [2023-11-06 22:32:36,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:32:36,871 INFO L413 NwaCegarLoop]: 1477 mSDtfsCounter, 1007 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2326 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:32:36,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1606 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2326 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 22:32:37,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149194 states. [2023-11-06 22:32:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149194 to 145248. [2023-11-06 22:32:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145248 states, 145247 states have (on average 1.0618257175707588) internal successors, (154227), 145247 states have internal predecessors, (154227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145248 states to 145248 states and 154227 transitions. [2023-11-06 22:32:38,924 INFO L78 Accepts]: Start accepts. Automaton has 145248 states and 154227 transitions. Word has length 636 [2023-11-06 22:32:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:32:38,924 INFO L495 AbstractCegarLoop]: Abstraction has 145248 states and 154227 transitions. [2023-11-06 22:32:38,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:32:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 145248 states and 154227 transitions. [2023-11-06 22:32:38,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2023-11-06 22:32:38,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:32:38,950 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:32:38,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:32:38,950 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:32:38,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:32:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1565889803, now seen corresponding path program 1 times [2023-11-06 22:32:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:32:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586520573] [2023-11-06 22:32:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:38,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:32:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 789 proven. 75 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-11-06 22:32:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:32:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586520573] [2023-11-06 22:32:41,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586520573] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:32:41,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053992714] [2023-11-06 22:32:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:32:41,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:32:41,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:32:41,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:32:41,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb1080cb-002b-47dd-acc9-88fc5110343b/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:32:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:32:41,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:32:41,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:32:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 927 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-11-06 22:32:43,052 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:32:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053992714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:32:43,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:32:43,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-06 22:32:43,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616386258] [2023-11-06 22:32:43,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:32:43,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:32:43,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:32:43,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:32:43,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:32:43,057 INFO L87 Difference]: Start difference. First operand 145248 states and 154227 transitions. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)