./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/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_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/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_261b97ab-a808-43ae-827f-571f569bce4c/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 6814e4b1182b075f519057bacd5c07f341f45068ab378c95bdf1e389d807335f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:56:29,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:56:29,238 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:56:29,250 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:56:29,251 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:56:29,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:56:29,291 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:56:29,291 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:56:29,292 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:56:29,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:56:29,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:56:29,294 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:56:29,295 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:56:29,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:56:29,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:56:29,297 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:56:29,298 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:56:29,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:56:29,299 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:56:29,300 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:56:29,300 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:56:29,301 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:56:29,302 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:56:29,302 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:56:29,303 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:56:29,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:56:29,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:56:29,305 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:56:29,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:56:29,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:56:29,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:56:29,308 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:56:29,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:56:29,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:56:29,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:56:29,310 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:56:29,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:56:29,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:56:29,312 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:56:29,312 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_261b97ab-a808-43ae-827f-571f569bce4c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6814e4b1182b075f519057bacd5c07f341f45068ab378c95bdf1e389d807335f [2023-11-06 21:56:29,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:56:29,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:56:29,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:56:29,748 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:56:29,749 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:56:29,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i [2023-11-06 21:56:32,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:56:33,262 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:56:33,264 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i [2023-11-06 21:56:33,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/data/76ea1947e/e723f2f09ea14e65bea545abd0a9d1e6/FLAG9cf7bd129 [2023-11-06 21:56:33,301 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/data/76ea1947e/e723f2f09ea14e65bea545abd0a9d1e6 [2023-11-06 21:56:33,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:56:33,306 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:56:33,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:56:33,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:56:33,318 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:56:33,319 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45eb6ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33, skipping insertion in model container [2023-11-06 21:56:33,321 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:56:33,613 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_261b97ab-a808-43ae-827f-571f569bce4c/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i[913,926] [2023-11-06 21:56:33,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:56:33,764 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:56:33,778 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_261b97ab-a808-43ae-827f-571f569bce4c/sv-benchmarks/c/hardness-nfm22/hardness_codestructure_normal_file-84.i[913,926] [2023-11-06 21:56:33,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:56:33,850 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:56:33,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33 WrapperNode [2023-11-06 21:56:33,851 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:56:33,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:56:33,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:56:33,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:56:33,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,879 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,941 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 194 [2023-11-06 21:56:33,941 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:56:33,942 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:56:33,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:56:33,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:56:33,954 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,959 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,959 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,973 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:33,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:56:33,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:56:33,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:56:33,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:56:33,991 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (1/1) ... [2023-11-06 21:56:34,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:56:34,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:34,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:56:34,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:56:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:56:34,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:56:34,176 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:56:34,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:56:34,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:56:34,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:56:34,293 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:56:34,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:56:34,816 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:56:34,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:56:34,825 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:56:34,827 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:56:34 BoogieIcfgContainer [2023-11-06 21:56:34,827 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:56:34,830 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:56:34,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:56:34,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:56:34,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:56:33" (1/3) ... [2023-11-06 21:56:34,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a30bddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:56:34, skipping insertion in model container [2023-11-06 21:56:34,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:56:33" (2/3) ... [2023-11-06 21:56:34,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a30bddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:56:34, skipping insertion in model container [2023-11-06 21:56:34,849 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:56:34" (3/3) ... [2023-11-06 21:56:34,851 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_codestructure_normal_file-84.i [2023-11-06 21:56:34,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:56:34,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:56:34,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:56:34,942 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;@7f6367fa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:56:34,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:56:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 52 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 21:56:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 21:56:34,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:34,969 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:34,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:34,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 85667634, now seen corresponding path program 1 times [2023-11-06 21:56:34,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929747856] [2023-11-06 21:56:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:35,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:35,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929747856] [2023-11-06 21:56:35,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:56:35,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832845812] [2023-11-06 21:56:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:35,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:35,271 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:35,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:56:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:35,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:56:35,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2023-11-06 21:56:35,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832845812] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:35,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:56:35,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523119619] [2023-11-06 21:56:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:35,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:56:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:56:35,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:56:35,714 INFO L87 Difference]: Start difference. First operand has 80 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 52 states have internal predecessors, (74), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-06 21:56:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:35,764 INFO L93 Difference]: Finished difference Result 153 states and 272 transitions. [2023-11-06 21:56:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:56:35,767 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) Word has length 164 [2023-11-06 21:56:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:35,777 INFO L225 Difference]: With dead ends: 153 [2023-11-06 21:56:35,778 INFO L226 Difference]: Without dead ends: 76 [2023-11-06 21:56:35,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:56:35,787 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:35,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:56:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-06 21:56:35,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-06 21:56:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 states have internal predecessors, (67), 26 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 21:56:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 119 transitions. [2023-11-06 21:56:35,865 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 119 transitions. Word has length 164 [2023-11-06 21:56:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:35,866 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 119 transitions. [2023-11-06 21:56:35,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-06 21:56:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 119 transitions. [2023-11-06 21:56:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 21:56:35,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:35,873 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:35,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:36,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:56:36,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:36,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 134893750, now seen corresponding path program 1 times [2023-11-06 21:56:36,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:36,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119546318] [2023-11-06 21:56:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:36,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:36,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:36,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98001645] [2023-11-06 21:56:36,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:36,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:36,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:36,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:56:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:36,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:56:36,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:56:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:56:48,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:56:48,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:56:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119546318] [2023-11-06 21:56:48,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:56:48,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98001645] [2023-11-06 21:56:48,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98001645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:56:48,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:56:48,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:56:48,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066906102] [2023-11-06 21:56:48,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:56:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:56:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:56:48,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:56:48,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:56:48,386 INFO L87 Difference]: Start difference. First operand 76 states and 119 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:56:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:56:50,279 INFO L93 Difference]: Finished difference Result 221 states and 341 transitions. [2023-11-06 21:56:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:56:50,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 164 [2023-11-06 21:56:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:56:50,284 INFO L225 Difference]: With dead ends: 221 [2023-11-06 21:56:50,285 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 21:56:50,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:56:50,288 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 123 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:56:50,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 343 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 21:56:50,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 21:56:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 122. [2023-11-06 21:56:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 92 states have internal predecessors, (137), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 21:56:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 193 transitions. [2023-11-06 21:56:50,325 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 193 transitions. Word has length 164 [2023-11-06 21:56:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:56:50,326 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 193 transitions. [2023-11-06 21:56:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:56:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 193 transitions. [2023-11-06 21:56:50,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-06 21:56:50,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:56:50,332 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:56:50,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:56:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:50,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:56:50,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:56:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1453454152, now seen corresponding path program 1 times [2023-11-06 21:56:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:56:50,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711526586] [2023-11-06 21:56:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:56:50,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:56:50,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3996344] [2023-11-06 21:56:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:56:50,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:56:50,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:56:50,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:56:50,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:56:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:56:50,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:56:50,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:00,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:00,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711526586] [2023-11-06 21:57:00,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:00,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3996344] [2023-11-06 21:57:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3996344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:00,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:57:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980800173] [2023-11-06 21:57:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:57:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:57:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:00,092 INFO L87 Difference]: Start difference. First operand 122 states and 193 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:02,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:02,310 INFO L93 Difference]: Finished difference Result 273 states and 429 transitions. [2023-11-06 21:57:02,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:02,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 164 [2023-11-06 21:57:02,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:02,315 INFO L225 Difference]: With dead ends: 273 [2023-11-06 21:57:02,316 INFO L226 Difference]: Without dead ends: 154 [2023-11-06 21:57:02,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:02,318 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 83 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:02,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 533 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 21:57:02,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-06 21:57:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2023-11-06 21:57:02,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 103 states have (on average 1.5339805825242718) internal successors, (158), 104 states have internal predecessors, (158), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 21:57:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 214 transitions. [2023-11-06 21:57:02,346 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 214 transitions. Word has length 164 [2023-11-06 21:57:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:02,347 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 214 transitions. [2023-11-06 21:57:02,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 214 transitions. [2023-11-06 21:57:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 21:57:02,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:02,352 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:02,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:02,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:02,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:02,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1049513634, now seen corresponding path program 1 times [2023-11-06 21:57:02,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:02,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640158910] [2023-11-06 21:57:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:02,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:02,631 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:02,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922972789] [2023-11-06 21:57:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:02,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:02,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:02,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:02,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:57:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:02,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:57:02,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 369 proven. 63 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2023-11-06 21:57:02,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2023-11-06 21:57:03,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:03,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640158910] [2023-11-06 21:57:03,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:03,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922972789] [2023-11-06 21:57:03,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922972789] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:03,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:57:03,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:57:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479839692] [2023-11-06 21:57:03,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:03,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:03,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:03,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:57:03,187 INFO L87 Difference]: Start difference. First operand 134 states and 214 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-11-06 21:57:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:03,479 INFO L93 Difference]: Finished difference Result 273 states and 432 transitions. [2023-11-06 21:57:03,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:57:03,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 165 [2023-11-06 21:57:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:03,483 INFO L225 Difference]: With dead ends: 273 [2023-11-06 21:57:03,483 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 21:57:03,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:57:03,486 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 108 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:03,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 137 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:57:03,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 21:57:03,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2023-11-06 21:57:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 106 states have (on average 1.5) internal successors, (159), 107 states have internal predecessors, (159), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 21:57:03,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 215 transitions. [2023-11-06 21:57:03,512 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 215 transitions. Word has length 165 [2023-11-06 21:57:03,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:03,513 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 215 transitions. [2023-11-06 21:57:03,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 3 states have call successors, (47), 2 states have call predecessors, (47), 4 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-11-06 21:57:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 215 transitions. [2023-11-06 21:57:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 21:57:03,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:03,517 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:03,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:03,724 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:03,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:03,725 INFO L85 PathProgramCache]: Analyzing trace with hash -2070581988, now seen corresponding path program 1 times [2023-11-06 21:57:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136852701] [2023-11-06 21:57:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:03,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:03,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:03,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204682061] [2023-11-06 21:57:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:03,803 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:03,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:57:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:03,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 21:57:03,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:05,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:05,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136852701] [2023-11-06 21:57:05,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204682061] [2023-11-06 21:57:05,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204682061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:05,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:05,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:57:05,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263066060] [2023-11-06 21:57:05,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:05,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:57:05,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:57:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:05,034 INFO L87 Difference]: Start difference. First operand 138 states and 215 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:05,616 INFO L93 Difference]: Finished difference Result 299 states and 458 transitions. [2023-11-06 21:57:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 21:57:05,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:05,619 INFO L225 Difference]: With dead ends: 299 [2023-11-06 21:57:05,619 INFO L226 Difference]: Without dead ends: 164 [2023-11-06 21:57:05,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:05,621 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 100 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:05,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 348 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:57:05,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-11-06 21:57:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 126. [2023-11-06 21:57:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.4574468085106382) internal successors, (137), 95 states have internal predecessors, (137), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 21:57:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 193 transitions. [2023-11-06 21:57:05,645 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 193 transitions. Word has length 165 [2023-11-06 21:57:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:05,646 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 193 transitions. [2023-11-06 21:57:05,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 193 transitions. [2023-11-06 21:57:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2023-11-06 21:57:05,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:05,649 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:05,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:05,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:05,861 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:05,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash 230240602, now seen corresponding path program 1 times [2023-11-06 21:57:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:05,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894268845] [2023-11-06 21:57:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:05,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:05,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:05,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406143099] [2023-11-06 21:57:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:05,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:05,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:05,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:57:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:06,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:57:06,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:06,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:06,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894268845] [2023-11-06 21:57:06,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:06,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406143099] [2023-11-06 21:57:06,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406143099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:06,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:06,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:57:06,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464634463] [2023-11-06 21:57:06,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:06,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:57:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:57:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:57:06,441 INFO L87 Difference]: Start difference. First operand 126 states and 193 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:06,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:06,779 INFO L93 Difference]: Finished difference Result 269 states and 407 transitions. [2023-11-06 21:57:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:57:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 165 [2023-11-06 21:57:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:06,782 INFO L225 Difference]: With dead ends: 269 [2023-11-06 21:57:06,782 INFO L226 Difference]: Without dead ends: 146 [2023-11-06 21:57:06,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:06,784 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 80 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:06,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 545 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:57:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-06 21:57:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2023-11-06 21:57:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 83 states have internal predecessors, (115), 28 states have call successors, (28), 3 states have call predecessors, (28), 3 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-06 21:57:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 171 transitions. [2023-11-06 21:57:06,804 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 171 transitions. Word has length 165 [2023-11-06 21:57:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:06,805 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 171 transitions. [2023-11-06 21:57:06,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:06,805 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 171 transitions. [2023-11-06 21:57:06,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 21:57:06,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:06,808 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:06,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:07,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 21:57:07,014 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:07,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:07,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1426198609, now seen corresponding path program 1 times [2023-11-06 21:57:07,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:07,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934906897] [2023-11-06 21:57:07,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:07,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:07,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:07,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751607358] [2023-11-06 21:57:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:07,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:07,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:07,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:57:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:07,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:57:07,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:09,066 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:09,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:09,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934906897] [2023-11-06 21:57:09,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:09,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751607358] [2023-11-06 21:57:09,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751607358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:09,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:09,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:57:09,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338938989] [2023-11-06 21:57:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:09,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:57:09,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:57:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:09,070 INFO L87 Difference]: Start difference. First operand 114 states and 171 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:09,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:09,918 INFO L93 Difference]: Finished difference Result 415 states and 602 transitions. [2023-11-06 21:57:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:57:09,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 21:57:09,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:09,922 INFO L225 Difference]: With dead ends: 415 [2023-11-06 21:57:09,922 INFO L226 Difference]: Without dead ends: 304 [2023-11-06 21:57:09,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:57:09,924 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 195 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:09,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 641 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:57:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-11-06 21:57:09,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 184. [2023-11-06 21:57:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 144 states have (on average 1.4166666666666667) internal successors, (204), 147 states have internal predecessors, (204), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 21:57:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2023-11-06 21:57:09,959 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 166 [2023-11-06 21:57:09,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:09,960 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2023-11-06 21:57:09,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2023-11-06 21:57:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 21:57:09,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:09,963 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:09,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 21:57:10,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:10,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:10,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash 415081359, now seen corresponding path program 1 times [2023-11-06 21:57:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867744870] [2023-11-06 21:57:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:10,200 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:10,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452170777] [2023-11-06 21:57:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:10,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:10,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:10,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:10,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:57:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:10,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:57:10,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:10,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:10,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:10,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867744870] [2023-11-06 21:57:10,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452170777] [2023-11-06 21:57:10,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452170777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:10,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:10,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 21:57:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549926291] [2023-11-06 21:57:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:57:10,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:10,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:57:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:57:10,721 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:11,516 INFO L93 Difference]: Finished difference Result 428 states and 622 transitions. [2023-11-06 21:57:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:57:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 21:57:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:11,520 INFO L225 Difference]: With dead ends: 428 [2023-11-06 21:57:11,520 INFO L226 Difference]: Without dead ends: 247 [2023-11-06 21:57:11,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:57:11,522 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 169 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:11,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 615 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:57:11,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-11-06 21:57:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 184. [2023-11-06 21:57:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 144 states have (on average 1.4166666666666667) internal successors, (204), 147 states have internal predecessors, (204), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 21:57:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2023-11-06 21:57:11,558 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 166 [2023-11-06 21:57:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:11,558 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2023-11-06 21:57:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2023-11-06 21:57:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 21:57:11,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:11,562 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:11,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:11,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:11,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:11,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:11,770 INFO L85 PathProgramCache]: Analyzing trace with hash 146334931, now seen corresponding path program 1 times [2023-11-06 21:57:11,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568141423] [2023-11-06 21:57:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:11,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:11,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330073571] [2023-11-06 21:57:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:11,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:11,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:11,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:57:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:11,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:57:11,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 792 proven. 96 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-11-06 21:57:14,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:27,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568141423] [2023-11-06 21:57:27,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330073571] [2023-11-06 21:57:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330073571] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:27,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:27,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [15] total 20 [2023-11-06 21:57:27,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646307701] [2023-11-06 21:57:27,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:27,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:27,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:27,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:27,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:57:27,483 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:33,856 INFO L93 Difference]: Finished difference Result 456 states and 661 transitions. [2023-11-06 21:57:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:57:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 21:57:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:33,860 INFO L225 Difference]: With dead ends: 456 [2023-11-06 21:57:33,860 INFO L226 Difference]: Without dead ends: 275 [2023-11-06 21:57:33,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2023-11-06 21:57:33,862 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 171 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:33,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 616 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-06 21:57:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-06 21:57:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 164. [2023-11-06 21:57:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.3951612903225807) internal successors, (173), 127 states have internal predecessors, (173), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 21:57:33,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 241 transitions. [2023-11-06 21:57:33,897 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 241 transitions. Word has length 166 [2023-11-06 21:57:33,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:33,898 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 241 transitions. [2023-11-06 21:57:33,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 241 transitions. [2023-11-06 21:57:33,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-06 21:57:33,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:33,901 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:33,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 21:57:34,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:34,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:34,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash -864782319, now seen corresponding path program 1 times [2023-11-06 21:57:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:34,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218287505] [2023-11-06 21:57:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:34,138 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:34,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939132510] [2023-11-06 21:57:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:34,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:34,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:34,140 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:34,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:57:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:34,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 21:57:34,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 896 proven. 138 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2023-11-06 21:57:35,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:46,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:46,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218287505] [2023-11-06 21:57:46,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:46,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939132510] [2023-11-06 21:57:46,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939132510] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:46,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:57:46,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [21] total 26 [2023-11-06 21:57:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811098006] [2023-11-06 21:57:46,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:57:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:57:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-06 21:57:46,911 INFO L87 Difference]: Start difference. First operand 164 states and 241 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:53,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:53,705 INFO L93 Difference]: Finished difference Result 364 states and 527 transitions. [2023-11-06 21:57:53,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:57:53,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 166 [2023-11-06 21:57:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:53,709 INFO L225 Difference]: With dead ends: 364 [2023-11-06 21:57:53,709 INFO L226 Difference]: Without dead ends: 207 [2023-11-06 21:57:53,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:57:53,711 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 145 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:53,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 583 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 21:57:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-06 21:57:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2023-11-06 21:57:53,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 116 states have (on average 1.3793103448275863) internal successors, (160), 119 states have internal predecessors, (160), 34 states have call successors, (34), 5 states have call predecessors, (34), 5 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-06 21:57:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 228 transitions. [2023-11-06 21:57:53,744 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 228 transitions. Word has length 166 [2023-11-06 21:57:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:53,745 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 228 transitions. [2023-11-06 21:57:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 228 transitions. [2023-11-06 21:57:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 21:57:53,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:53,747 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:53,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:57:53,953 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:53,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:53,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1208279864, now seen corresponding path program 1 times [2023-11-06 21:57:53,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:53,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295071110] [2023-11-06 21:57:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:53,988 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:53,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390780359] [2023-11-06 21:57:53,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:53,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:53,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:53,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:54,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:57:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 21:57:54,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:55,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295071110] [2023-11-06 21:57:55,611 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:55,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390780359] [2023-11-06 21:57:55,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390780359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:55,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:55,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:57:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976999085] [2023-11-06 21:57:55,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:57:55,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:57:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:57:55,613 INFO L87 Difference]: Start difference. First operand 156 states and 228 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:56,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:56,653 INFO L93 Difference]: Finished difference Result 605 states and 877 transitions. [2023-11-06 21:57:56,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:57:56,654 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 167 [2023-11-06 21:57:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:56,658 INFO L225 Difference]: With dead ends: 605 [2023-11-06 21:57:56,659 INFO L226 Difference]: Without dead ends: 456 [2023-11-06 21:57:56,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:56,660 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 378 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:56,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1065 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:57:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-06 21:57:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 280. [2023-11-06 21:57:56,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 209 states have (on average 1.4019138755980862) internal successors, (293), 213 states have internal predecessors, (293), 62 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 21:57:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 417 transitions. [2023-11-06 21:57:56,716 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 417 transitions. Word has length 167 [2023-11-06 21:57:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:56,717 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 417 transitions. [2023-11-06 21:57:56,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 417 transitions. [2023-11-06 21:57:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 21:57:56,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:56,719 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:56,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:56,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:56,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:56,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2075570182, now seen corresponding path program 1 times [2023-11-06 21:57:56,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:56,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011474321] [2023-11-06 21:57:56,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:56,956 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:56,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374195939] [2023-11-06 21:57:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:56,958 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:57:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 21:57:57,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:57:57,438 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:57:57,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:57,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011474321] [2023-11-06 21:57:57,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:57:57,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374195939] [2023-11-06 21:57:57,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374195939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:57,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:57,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 21:57:57,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731660793] [2023-11-06 21:57:57,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:57:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:57:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:57:57,441 INFO L87 Difference]: Start difference. First operand 280 states and 417 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:57:58,506 INFO L93 Difference]: Finished difference Result 492 states and 715 transitions. [2023-11-06 21:57:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:57:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 167 [2023-11-06 21:57:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:57:58,510 INFO L225 Difference]: With dead ends: 492 [2023-11-06 21:57:58,510 INFO L226 Difference]: Without dead ends: 368 [2023-11-06 21:57:58,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:57:58,512 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 251 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:57:58,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1222 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 21:57:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-06 21:57:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 280. [2023-11-06 21:57:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 209 states have (on average 1.4019138755980862) internal successors, (293), 213 states have internal predecessors, (293), 62 states have call successors, (62), 8 states have call predecessors, (62), 8 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-06 21:57:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 417 transitions. [2023-11-06 21:57:58,575 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 417 transitions. Word has length 167 [2023-11-06 21:57:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:57:58,575 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 417 transitions. [2023-11-06 21:57:58,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:57:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 417 transitions. [2023-11-06 21:57:58,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 21:57:58,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:57:58,578 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:58,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:58,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:58,785 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:57:58,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:58,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1806823754, now seen corresponding path program 1 times [2023-11-06 21:57:58,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:58,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020758943] [2023-11-06 21:57:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:58,811 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:57:58,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165702997] [2023-11-06 21:57:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:58,813 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:58,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:57:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 21:57:58,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 792 proven. 96 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-11-06 21:58:01,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:17,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2023-11-06 21:58:17,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020758943] [2023-11-06 21:58:17,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:17,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165702997] [2023-11-06 21:58:17,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165702997] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:17,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:17,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-06 21:58:17,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427671940] [2023-11-06 21:58:17,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:17,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 21:58:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 21:58:17,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-11-06 21:58:17,166 INFO L87 Difference]: Start difference. First operand 280 states and 417 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 21:58:22,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:28,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:47,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:49,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:53,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:55,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:58:57,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:00,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:20,887 WARN L293 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 149 DAG size of output: 145 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:59:23,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:26,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:28,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:31,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 21:59:37,047 WARN L293 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 150 DAG size of output: 146 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-06 21:59:51,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:16,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:17,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:21,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:23,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:25,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:00:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:32,583 INFO L93 Difference]: Finished difference Result 560 states and 799 transitions. [2023-11-06 22:00:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:00:32,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 167 [2023-11-06 22:00:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:32,588 INFO L225 Difference]: With dead ends: 560 [2023-11-06 22:00:32,589 INFO L226 Difference]: Without dead ends: 436 [2023-11-06 22:00:32,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 85.7s TimeCoverageRelationStatistics Valid=245, Invalid=1307, Unknown=8, NotChecked=0, Total=1560 [2023-11-06 22:00:32,591 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 379 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 33 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:32,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1198 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 963 Invalid, 15 Unknown, 0 Unchecked, 55.7s Time] [2023-11-06 22:00:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-11-06 22:00:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 277. [2023-11-06 22:00:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 208 states have (on average 1.4086538461538463) internal successors, (293), 211 states have internal predecessors, (293), 60 states have call successors, (60), 8 states have call predecessors, (60), 8 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2023-11-06 22:00:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 413 transitions. [2023-11-06 22:00:32,674 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 413 transitions. Word has length 167 [2023-11-06 22:00:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:32,675 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 413 transitions. [2023-11-06 22:00:32,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 1 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2023-11-06 22:00:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 413 transitions. [2023-11-06 22:00:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-06 22:00:32,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:32,677 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:32,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:32,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:32,884 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:32,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:32,884 INFO L85 PathProgramCache]: Analyzing trace with hash 795706504, now seen corresponding path program 1 times [2023-11-06 22:00:32,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:32,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991014736] [2023-11-06 22:00:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:32,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:32,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:32,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972434141] [2023-11-06 22:00:32,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:32,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:32,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:32,914 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:32,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_261b97ab-a808-43ae-827f-571f569bce4c/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:00:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:33,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 22:00:33,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 792 proven. 96 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2023-11-06 22:00:34,285 INFO L327 TraceCheckSpWp]: Computing backward predicates...