./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/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_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/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 64bit --witnessprinter.graph.data.programhash be0bab9383d2a4564721e1782bf55847d411cd965953ed7ba185b34aef7281d2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:58:10,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:58:10,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-64bit-Automizer_Default.epf [2023-11-06 21:58:10,174 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:58:10,175 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:58:10,203 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:58:10,203 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:58:10,204 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:58:10,205 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:58:10,205 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:58:10,206 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:58:10,207 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:58:10,207 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:58:10,208 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:58:10,208 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:58:10,217 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:58:10,218 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:58:10,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:58:10,220 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:58:10,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:58:10,222 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:58:10,222 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:58:10,223 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:58:10,224 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:58:10,224 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:58:10,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:10,225 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:58:10,226 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:58:10,226 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:58:10,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:58:10,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:58:10,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:58:10,229 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:58:10,229 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:58:10,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:58:10,229 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:58:10,230 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_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be0bab9383d2a4564721e1782bf55847d411cd965953ed7ba185b34aef7281d2 [2023-11-06 21:58:10,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:58:10,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:58:10,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:58:10,603 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:58:10,603 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:58:10,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c [2023-11-06 21:58:13,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:58:14,284 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:58:14,284 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c [2023-11-06 21:58:14,313 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/data/f6d57643c/e3cbfde8692a43d386f5f5bc9a3c7dc1/FLAG5d145cf0f [2023-11-06 21:58:14,331 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/data/f6d57643c/e3cbfde8692a43d386f5f5bc9a3c7dc1 [2023-11-06 21:58:14,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:58:14,341 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:58:14,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:14,348 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:58:14,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:58:14,356 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:14" (1/1) ... [2023-11-06 21:58:14,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585db3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:14, skipping insertion in model container [2023-11-06 21:58:14,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:58:14" (1/1) ... [2023-11-06 21:58:14,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:58:14,658 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_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c[1175,1188] [2023-11-06 21:58:15,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:15,200 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:58:15,213 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_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.elevator.2.prop1-func-interl.c[1175,1188] [2023-11-06 21:58:15,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:58:15,466 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:58:15,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15 WrapperNode [2023-11-06 21:58:15,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:58:15,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:15,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:58:15,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:58:15,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:15,615 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:16,620 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 7981 [2023-11-06 21:58:16,621 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:58:16,622 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:58:16,622 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:58:16,622 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:58:16,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:16,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:16,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:16,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,323 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,495 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,675 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:58:17,676 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:58:17,676 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:58:17,676 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:58:17,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (1/1) ... [2023-11-06 21:58:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:58:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:17,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:58:17,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:58:17,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:58:17,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:58:17,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:58:17,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:58:18,310 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:58:18,312 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:58:25,440 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:58:25,469 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:58:25,469 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:58:25,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:25 BoogieIcfgContainer [2023-11-06 21:58:25,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:58:25,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:58:25,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:58:25,484 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:58:25,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:58:14" (1/3) ... [2023-11-06 21:58:25,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b939077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:25, skipping insertion in model container [2023-11-06 21:58:25,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:58:15" (2/3) ... [2023-11-06 21:58:25,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b939077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:58:25, skipping insertion in model container [2023-11-06 21:58:25,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:58:25" (3/3) ... [2023-11-06 21:58:25,490 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.elevator.2.prop1-func-interl.c [2023-11-06 21:58:25,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:58:25,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:58:25,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:58:25,628 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;@629a9504, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:58:25,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:58:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 1789 states, 1787 states have (on average 1.6659205372132064) internal successors, (2977), 1788 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 21:58:25,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:25,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:25,658 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:25,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2050317324, now seen corresponding path program 1 times [2023-11-06 21:58:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:25,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817370404] [2023-11-06 21:58:25,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:25,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817370404] [2023-11-06 21:58:26,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817370404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:26,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:26,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018497410] [2023-11-06 21:58:26,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:26,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:26,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:26,986 INFO L87 Difference]: Start difference. First operand has 1789 states, 1787 states have (on average 1.6659205372132064) internal successors, (2977), 1788 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:27,259 INFO L93 Difference]: Finished difference Result 3475 states and 5787 transitions. [2023-11-06 21:58:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-11-06 21:58:27,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:27,297 INFO L225 Difference]: With dead ends: 3475 [2023-11-06 21:58:27,297 INFO L226 Difference]: Without dead ends: 1787 [2023-11-06 21:58:27,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:27,311 INFO L413 NwaCegarLoop]: 2969 mSDtfsCounter, 1 mSDsluCounter, 5932 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8901 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:27,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8901 Invalid, 11 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2023-11-06 21:58:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1787. [2023-11-06 21:58:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 1.6646136618141096) internal successors, (2973), 1786 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2973 transitions. [2023-11-06 21:58:27,482 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2973 transitions. Word has length 135 [2023-11-06 21:58:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:27,488 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 2973 transitions. [2023-11-06 21:58:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2973 transitions. [2023-11-06 21:58:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-06 21:58:27,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:27,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:27,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:58:27,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:27,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:27,505 INFO L85 PathProgramCache]: Analyzing trace with hash -862946668, now seen corresponding path program 1 times [2023-11-06 21:58:27,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:27,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547204540] [2023-11-06 21:58:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:27,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:27,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:27,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547204540] [2023-11-06 21:58:27,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547204540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:27,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:27,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:27,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814240721] [2023-11-06 21:58:27,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:27,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:27,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:27,927 INFO L87 Difference]: Start difference. First operand 1787 states and 2973 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:28,036 INFO L93 Difference]: Finished difference Result 3476 states and 5783 transitions. [2023-11-06 21:58:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-11-06 21:58:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:28,048 INFO L225 Difference]: With dead ends: 3476 [2023-11-06 21:58:28,049 INFO L226 Difference]: Without dead ends: 1790 [2023-11-06 21:58:28,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:28,058 INFO L413 NwaCegarLoop]: 2969 mSDtfsCounter, 1 mSDsluCounter, 5929 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8898 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8898 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2023-11-06 21:58:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1789. [2023-11-06 21:58:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 1.6638702460850112) internal successors, (2975), 1788 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 2975 transitions. [2023-11-06 21:58:28,116 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 2975 transitions. Word has length 136 [2023-11-06 21:58:28,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:28,118 INFO L495 AbstractCegarLoop]: Abstraction has 1789 states and 2975 transitions. [2023-11-06 21:58:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 2975 transitions. [2023-11-06 21:58:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-06 21:58:28,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:28,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:28,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:58:28,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:28,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1191974618, now seen corresponding path program 1 times [2023-11-06 21:58:28,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:28,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215584923] [2023-11-06 21:58:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:28,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215584923] [2023-11-06 21:58:28,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215584923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:28,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:28,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:58:28,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845673106] [2023-11-06 21:58:28,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:58:28,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:28,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:58:28,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:28,538 INFO L87 Difference]: Start difference. First operand 1789 states and 2975 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:28,690 INFO L93 Difference]: Finished difference Result 5155 states and 8576 transitions. [2023-11-06 21:58:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:58:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2023-11-06 21:58:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:28,710 INFO L225 Difference]: With dead ends: 5155 [2023-11-06 21:58:28,712 INFO L226 Difference]: Without dead ends: 3467 [2023-11-06 21:58:28,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:58:28,724 INFO L413 NwaCegarLoop]: 3115 mSDtfsCounter, 2790 mSDsluCounter, 6071 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2790 SdHoareTripleChecker+Valid, 9186 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:28,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2790 Valid, 9186 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2023-11-06 21:58:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 1791. [2023-11-06 21:58:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 1.6631284916201117) internal successors, (2977), 1790 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 2977 transitions. [2023-11-06 21:58:28,880 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 2977 transitions. Word has length 137 [2023-11-06 21:58:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:28,882 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 2977 transitions. [2023-11-06 21:58:28,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 2977 transitions. [2023-11-06 21:58:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-06 21:58:28,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:28,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 21:58:28,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:28,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash -991567238, now seen corresponding path program 1 times [2023-11-06 21:58:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:28,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148827508] [2023-11-06 21:58:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:28,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148827508] [2023-11-06 21:58:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148827508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573745346] [2023-11-06 21:58:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:29,392 INFO L87 Difference]: Start difference. First operand 1791 states and 2977 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:29,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:29,719 INFO L93 Difference]: Finished difference Result 5173 states and 8600 transitions. [2023-11-06 21:58:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:58:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2023-11-06 21:58:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:29,742 INFO L225 Difference]: With dead ends: 5173 [2023-11-06 21:58:29,743 INFO L226 Difference]: Without dead ends: 3483 [2023-11-06 21:58:29,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:58:29,748 INFO L413 NwaCegarLoop]: 3115 mSDtfsCounter, 5597 mSDsluCounter, 11831 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5597 SdHoareTripleChecker+Valid, 14946 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:29,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5597 Valid, 14946 Invalid, 47 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:58:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3483 states. [2023-11-06 21:58:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3483 to 1794. [2023-11-06 21:58:29,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 1.6631344116006692) internal successors, (2982), 1793 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:29,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 2982 transitions. [2023-11-06 21:58:29,831 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 2982 transitions. Word has length 138 [2023-11-06 21:58:29,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:29,832 INFO L495 AbstractCegarLoop]: Abstraction has 1794 states and 2982 transitions. [2023-11-06 21:58:29,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 2982 transitions. [2023-11-06 21:58:29,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-06 21:58:29,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:29,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:58:29,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 21:58:29,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:29,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:29,837 INFO L85 PathProgramCache]: Analyzing trace with hash 251191618, now seen corresponding path program 1 times [2023-11-06 21:58:29,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:29,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14820323] [2023-11-06 21:58:29,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:29,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:29,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:30,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14820323] [2023-11-06 21:58:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14820323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:30,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:30,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:58:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544517735] [2023-11-06 21:58:30,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:30,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:58:30,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:58:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:58:30,353 INFO L87 Difference]: Start difference. First operand 1794 states and 2982 transitions. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:30,599 INFO L93 Difference]: Finished difference Result 5251 states and 8732 transitions. [2023-11-06 21:58:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:58:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-06 21:58:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:30,624 INFO L225 Difference]: With dead ends: 5251 [2023-11-06 21:58:30,625 INFO L226 Difference]: Without dead ends: 3558 [2023-11-06 21:58:30,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:30,629 INFO L413 NwaCegarLoop]: 3105 mSDtfsCounter, 11366 mSDsluCounter, 5927 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11366 SdHoareTripleChecker+Valid, 9032 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:30,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11366 Valid, 9032 Invalid, 22 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:58:30,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2023-11-06 21:58:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 1880. [2023-11-06 21:58:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 1.6625864821713678) internal successors, (3124), 1879 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 3124 transitions. [2023-11-06 21:58:30,708 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 3124 transitions. Word has length 139 [2023-11-06 21:58:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:30,708 INFO L495 AbstractCegarLoop]: Abstraction has 1880 states and 3124 transitions. [2023-11-06 21:58:30,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 3124 transitions. [2023-11-06 21:58:30,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1259 [2023-11-06 21:58:30,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:30,768 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:30,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 21:58:30,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:30,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:30,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2143432345, now seen corresponding path program 1 times [2023-11-06 21:58:30,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:30,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457587826] [2023-11-06 21:58:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:31,034 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78592166] [2023-11-06 21:58:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:31,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:31,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:31,040 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:58:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:33,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 5746 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:58:33,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:35,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:58:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:40,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457587826] [2023-11-06 21:58:40,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:40,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78592166] [2023-11-06 21:58:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78592166] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:40,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:58:40,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-06 21:58:40,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241692050] [2023-11-06 21:58:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:40,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:58:40,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:40,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:58:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:58:40,816 INFO L87 Difference]: Start difference. First operand 1880 states and 3124 transitions. Second operand has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:49,342 INFO L93 Difference]: Finished difference Result 9738 states and 16148 transitions. [2023-11-06 21:58:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 21:58:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1258 [2023-11-06 21:58:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:49,387 INFO L225 Difference]: With dead ends: 9738 [2023-11-06 21:58:49,387 INFO L226 Difference]: Without dead ends: 6527 [2023-11-06 21:58:49,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2520 GetRequests, 2504 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:58:49,394 INFO L413 NwaCegarLoop]: 6785 mSDtfsCounter, 14492 mSDsluCounter, 15225 mSDsCounter, 0 mSdLazyCounter, 6562 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14492 SdHoareTripleChecker+Valid, 22010 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 6562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:49,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14492 Valid, 22010 Invalid, 6725 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [163 Valid, 6562 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-11-06 21:58:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6527 states. [2023-11-06 21:58:49,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6527 to 3279. [2023-11-06 21:58:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3279 states, 3278 states have (on average 1.664124466137889) internal successors, (5455), 3278 states have internal predecessors, (5455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3279 states to 3279 states and 5455 transitions. [2023-11-06 21:58:49,551 INFO L78 Accepts]: Start accepts. Automaton has 3279 states and 5455 transitions. Word has length 1258 [2023-11-06 21:58:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:49,554 INFO L495 AbstractCegarLoop]: Abstraction has 3279 states and 5455 transitions. [2023-11-06 21:58:49,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.71428571428572) internal successors, (1258), 7 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3279 states and 5455 transitions. [2023-11-06 21:58:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1260 [2023-11-06 21:58:49,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:49,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:49,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 21:58:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:49,846 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:49,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1517413885, now seen corresponding path program 1 times [2023-11-06 21:58:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471227965] [2023-11-06 21:58:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:50,101 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:50,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984810322] [2023-11-06 21:58:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:50,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:50,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:50,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:58:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:52,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 5749 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 21:58:52,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:52,476 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:52,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471227965] [2023-11-06 21:58:52,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:52,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984810322] [2023-11-06 21:58:52,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984810322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:52,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:52,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 21:58:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807709385] [2023-11-06 21:58:52,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:58:52,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:58:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:58:52,485 INFO L87 Difference]: Start difference. First operand 3279 states and 5455 transitions. Second operand has 8 states, 8 states have (on average 157.375) internal successors, (1259), 8 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:58:53,104 INFO L93 Difference]: Finished difference Result 8134 states and 13531 transitions. [2023-11-06 21:58:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:58:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 157.375) internal successors, (1259), 8 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1259 [2023-11-06 21:58:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:58:53,139 INFO L225 Difference]: With dead ends: 8134 [2023-11-06 21:58:53,140 INFO L226 Difference]: Without dead ends: 4956 [2023-11-06 21:58:53,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1253 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:58:53,146 INFO L413 NwaCegarLoop]: 3392 mSDtfsCounter, 7957 mSDsluCounter, 15869 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7957 SdHoareTripleChecker+Valid, 19261 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:58:53,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7957 Valid, 19261 Invalid, 189 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 21:58:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2023-11-06 21:58:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 3281. [2023-11-06 21:58:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3281 states, 3280 states have (on average 1.663719512195122) internal successors, (5457), 3280 states have internal predecessors, (5457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:53,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3281 states to 3281 states and 5457 transitions. [2023-11-06 21:58:53,278 INFO L78 Accepts]: Start accepts. Automaton has 3281 states and 5457 transitions. Word has length 1259 [2023-11-06 21:58:53,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:58:53,280 INFO L495 AbstractCegarLoop]: Abstraction has 3281 states and 5457 transitions. [2023-11-06 21:58:53,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.375) internal successors, (1259), 8 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:58:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 3281 states and 5457 transitions. [2023-11-06 21:58:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2023-11-06 21:58:53,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:58:53,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:53,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:53,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:53,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:58:53,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:53,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1116749325, now seen corresponding path program 1 times [2023-11-06 21:58:53,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:53,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100793185] [2023-11-06 21:58:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:53,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:58:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166768182] [2023-11-06 21:58:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:53,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:53,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:53,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:53,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:58:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:55,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 5752 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:58:55,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:58:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:58:59,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:58:59,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:59,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100793185] [2023-11-06 21:58:59,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:58:59,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166768182] [2023-11-06 21:58:59,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166768182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:58:59,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:58:59,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:58:59,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824946839] [2023-11-06 21:58:59,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:58:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:58:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:58:59,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:58:59,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:58:59,523 INFO L87 Difference]: Start difference. First operand 3281 states and 5457 transitions. Second operand has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:04,403 INFO L93 Difference]: Finished difference Result 9336 states and 15536 transitions. [2023-11-06 21:59:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:59:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1260 [2023-11-06 21:59:04,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:04,422 INFO L225 Difference]: With dead ends: 9336 [2023-11-06 21:59:04,423 INFO L226 Difference]: Without dead ends: 6156 [2023-11-06 21:59:04,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1255 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:59:04,429 INFO L413 NwaCegarLoop]: 4832 mSDtfsCounter, 1890 mSDsluCounter, 15266 mSDsCounter, 0 mSdLazyCounter, 4315 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1890 SdHoareTripleChecker+Valid, 20098 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:04,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1890 Valid, 20098 Invalid, 4316 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 4315 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 21:59:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2023-11-06 21:59:04,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 4808. [2023-11-06 21:59:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4808 states, 4807 states have (on average 1.663823590597046) internal successors, (7998), 4807 states have internal predecessors, (7998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4808 states to 4808 states and 7998 transitions. [2023-11-06 21:59:04,614 INFO L78 Accepts]: Start accepts. Automaton has 4808 states and 7998 transitions. Word has length 1260 [2023-11-06 21:59:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:04,616 INFO L495 AbstractCegarLoop]: Abstraction has 4808 states and 7998 transitions. [2023-11-06 21:59:04,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.0) internal successors, (1260), 6 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:04,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4808 states and 7998 transitions. [2023-11-06 21:59:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1261 [2023-11-06 21:59:04,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:04,643 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:04,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:04,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:04,866 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:04,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:04,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1051495989, now seen corresponding path program 1 times [2023-11-06 21:59:04,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:04,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325762559] [2023-11-06 21:59:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:04,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:05,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:05,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349056503] [2023-11-06 21:59:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:05,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:05,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:05,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:05,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:59:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:06,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 5753 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:59:06,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:10,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:10,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:10,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325762559] [2023-11-06 21:59:10,314 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:10,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349056503] [2023-11-06 21:59:10,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349056503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:10,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:10,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 21:59:10,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143493016] [2023-11-06 21:59:10,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:10,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:59:10,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:59:10,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 21:59:10,322 INFO L87 Difference]: Start difference. First operand 4808 states and 7998 transitions. Second operand has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:13,793 INFO L93 Difference]: Finished difference Result 10951 states and 18221 transitions. [2023-11-06 21:59:13,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:59:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1260 [2023-11-06 21:59:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:13,811 INFO L225 Difference]: With dead ends: 10951 [2023-11-06 21:59:13,811 INFO L226 Difference]: Without dead ends: 6244 [2023-11-06 21:59:13,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:59:13,819 INFO L413 NwaCegarLoop]: 4832 mSDtfsCounter, 1894 mSDsluCounter, 11160 mSDsCounter, 0 mSdLazyCounter, 3057 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 15992 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:13,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1894 Valid, 15992 Invalid, 3057 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 3057 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 21:59:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6244 states. [2023-11-06 21:59:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6244 to 5569. [2023-11-06 21:59:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5569 states, 5568 states have (on average 1.6637931034482758) internal successors, (9264), 5568 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5569 states to 5569 states and 9264 transitions. [2023-11-06 21:59:13,945 INFO L78 Accepts]: Start accepts. Automaton has 5569 states and 9264 transitions. Word has length 1260 [2023-11-06 21:59:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:13,947 INFO L495 AbstractCegarLoop]: Abstraction has 5569 states and 9264 transitions. [2023-11-06 21:59:13,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 5569 states and 9264 transitions. [2023-11-06 21:59:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1262 [2023-11-06 21:59:13,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:13,977 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:14,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:14,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:14,199 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:14,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1019387345, now seen corresponding path program 1 times [2023-11-06 21:59:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:14,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660194247] [2023-11-06 21:59:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:14,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:14,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:14,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477594926] [2023-11-06 21:59:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:14,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:14,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:59:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:16,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 5755 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 21:59:16,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:17,339 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660194247] [2023-11-06 21:59:17,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477594926] [2023-11-06 21:59:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477594926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:17,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:17,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:59:17,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664910427] [2023-11-06 21:59:17,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:59:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:59:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:59:17,346 INFO L87 Difference]: Start difference. First operand 5569 states and 9264 transitions. Second operand has 6 states, 6 states have (on average 210.16666666666666) internal successors, (1261), 6 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:20,120 INFO L93 Difference]: Finished difference Result 14181 states and 23594 transitions. [2023-11-06 21:59:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 21:59:20,121 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 210.16666666666666) internal successors, (1261), 6 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1261 [2023-11-06 21:59:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:20,137 INFO L225 Difference]: With dead ends: 14181 [2023-11-06 21:59:20,137 INFO L226 Difference]: Without dead ends: 6737 [2023-11-06 21:59:20,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 1257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 21:59:20,148 INFO L413 NwaCegarLoop]: 2269 mSDtfsCounter, 6290 mSDsluCounter, 6760 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6290 SdHoareTripleChecker+Valid, 9029 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:20,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6290 Valid, 9029 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 21:59:20,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2023-11-06 21:59:20,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 6063. [2023-11-06 21:59:20,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 6062 states have (on average 1.6631474760805014) internal successors, (10082), 6062 states have internal predecessors, (10082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 10082 transitions. [2023-11-06 21:59:20,270 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 10082 transitions. Word has length 1261 [2023-11-06 21:59:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:20,271 INFO L495 AbstractCegarLoop]: Abstraction has 6063 states and 10082 transitions. [2023-11-06 21:59:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.16666666666666) internal successors, (1261), 6 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 10082 transitions. [2023-11-06 21:59:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1263 [2023-11-06 21:59:20,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:20,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:20,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:20,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:20,513 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:20,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:20,514 INFO L85 PathProgramCache]: Analyzing trace with hash 30496267, now seen corresponding path program 1 times [2023-11-06 21:59:20,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:20,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144275710] [2023-11-06 21:59:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:20,664 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864798044] [2023-11-06 21:59:20,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:20,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:20,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:20,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:20,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:59:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:22,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 5758 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 21:59:22,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:23,688 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:23,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144275710] [2023-11-06 21:59:23,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864798044] [2023-11-06 21:59:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864798044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:23,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:23,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-11-06 21:59:23,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679058554] [2023-11-06 21:59:23,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 21:59:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:23,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 21:59:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:59:23,701 INFO L87 Difference]: Start difference. First operand 6063 states and 10082 transitions. Second operand has 15 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:24,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:24,854 INFO L93 Difference]: Finished difference Result 33188 states and 55189 transitions. [2023-11-06 21:59:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 21:59:24,855 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1262 [2023-11-06 21:59:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:24,907 INFO L225 Difference]: With dead ends: 33188 [2023-11-06 21:59:24,907 INFO L226 Difference]: Without dead ends: 27226 [2023-11-06 21:59:24,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 1248 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-06 21:59:24,919 INFO L413 NwaCegarLoop]: 2925 mSDtfsCounter, 38680 mSDsluCounter, 31401 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38680 SdHoareTripleChecker+Valid, 34326 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:24,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38680 Valid, 34326 Invalid, 613 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:59:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27226 states. [2023-11-06 21:59:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27226 to 6432. [2023-11-06 21:59:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6432 states, 6431 states have (on average 1.661794433214119) internal successors, (10687), 6431 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6432 states to 6432 states and 10687 transitions. [2023-11-06 21:59:25,148 INFO L78 Accepts]: Start accepts. Automaton has 6432 states and 10687 transitions. Word has length 1262 [2023-11-06 21:59:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:25,149 INFO L495 AbstractCegarLoop]: Abstraction has 6432 states and 10687 transitions. [2023-11-06 21:59:25,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 84.13333333333334) internal successors, (1262), 15 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 6432 states and 10687 transitions. [2023-11-06 21:59:25,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2023-11-06 21:59:25,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:25,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:25,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:25,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:25,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 191867995, now seen corresponding path program 1 times [2023-11-06 21:59:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783516720] [2023-11-06 21:59:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:25,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639879438] [2023-11-06 21:59:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:25,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:25,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:25,535 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:25,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:59:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:27,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 5761 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:59:27,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:28,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783516720] [2023-11-06 21:59:28,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639879438] [2023-11-06 21:59:28,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639879438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 21:59:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702188630] [2023-11-06 21:59:28,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:28,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 21:59:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 21:59:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:59:28,033 INFO L87 Difference]: Start difference. First operand 6432 states and 10687 transitions. Second operand has 11 states, 11 states have (on average 114.81818181818181) internal successors, (1263), 11 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:29,128 INFO L93 Difference]: Finished difference Result 32205 states and 53496 transitions. [2023-11-06 21:59:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:59:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 114.81818181818181) internal successors, (1263), 11 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1263 [2023-11-06 21:59:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:29,169 INFO L225 Difference]: With dead ends: 32205 [2023-11-06 21:59:29,170 INFO L226 Difference]: Without dead ends: 25874 [2023-11-06 21:59:29,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1253 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:59:29,181 INFO L413 NwaCegarLoop]: 3379 mSDtfsCounter, 19264 mSDsluCounter, 26523 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19264 SdHoareTripleChecker+Valid, 29902 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:29,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19264 Valid, 29902 Invalid, 542 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 21:59:29,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2023-11-06 21:59:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 6914. [2023-11-06 21:59:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 6913 states have (on average 1.6599161001012586) internal successors, (11475), 6913 states have internal predecessors, (11475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 11475 transitions. [2023-11-06 21:59:29,400 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 11475 transitions. Word has length 1263 [2023-11-06 21:59:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:29,401 INFO L495 AbstractCegarLoop]: Abstraction has 6914 states and 11475 transitions. [2023-11-06 21:59:29,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 114.81818181818181) internal successors, (1263), 11 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 11475 transitions. [2023-11-06 21:59:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2023-11-06 21:59:29,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:29,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:29,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:29,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:29,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:29,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash 924852131, now seen corresponding path program 1 times [2023-11-06 21:59:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:29,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074557051] [2023-11-06 21:59:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:29,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:29,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995722305] [2023-11-06 21:59:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:29,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:29,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:29,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:59:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:31,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 5762 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 21:59:31,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:59:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:59:32,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:59:32,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:59:32,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074557051] [2023-11-06 21:59:32,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:59:32,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995722305] [2023-11-06 21:59:32,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995722305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:59:32,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:59:32,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-11-06 21:59:32,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007030050] [2023-11-06 21:59:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:59:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 21:59:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:59:32,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 21:59:32,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-06 21:59:32,779 INFO L87 Difference]: Start difference. First operand 6914 states and 11475 transitions. Second operand has 14 states, 14 states have (on average 90.21428571428571) internal successors, (1263), 14 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:57,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:59:57,092 INFO L93 Difference]: Finished difference Result 36676 states and 60885 transitions. [2023-11-06 21:59:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:59:57,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 90.21428571428571) internal successors, (1263), 14 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1263 [2023-11-06 21:59:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:59:57,125 INFO L225 Difference]: With dead ends: 36676 [2023-11-06 21:59:57,126 INFO L226 Difference]: Without dead ends: 29863 [2023-11-06 21:59:57,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1258 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 21:59:57,140 INFO L413 NwaCegarLoop]: 10673 mSDtfsCounter, 31860 mSDsluCounter, 82189 mSDsCounter, 0 mSdLazyCounter, 26824 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31860 SdHoareTripleChecker+Valid, 92862 SdHoareTripleChecker+Invalid, 26828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:59:57,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31860 Valid, 92862 Invalid, 26828 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [4 Valid, 26824 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2023-11-06 21:59:57,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29863 states. [2023-11-06 21:59:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29863 to 7190. [2023-11-06 21:59:57,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 7189 states have (on average 1.6596188621505077) internal successors, (11931), 7189 states have internal predecessors, (11931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 11931 transitions. [2023-11-06 21:59:57,355 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 11931 transitions. Word has length 1263 [2023-11-06 21:59:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:59:57,356 INFO L495 AbstractCegarLoop]: Abstraction has 7190 states and 11931 transitions. [2023-11-06 21:59:57,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.21428571428571) internal successors, (1263), 14 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:59:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 11931 transitions. [2023-11-06 21:59:57,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2023-11-06 21:59:57,384 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:59:57,385 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:57,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:59:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:57,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:59:57,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:59:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1999402593, now seen corresponding path program 1 times [2023-11-06 21:59:57,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:59:57,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078141827] [2023-11-06 21:59:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:57,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:59:57,730 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:59:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504773323] [2023-11-06 21:59:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:59:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:59:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:59:57,745 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:59:57,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:59:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:59:59,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 5763 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 21:59:59,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:01,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078141827] [2023-11-06 22:00:02,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504773323] [2023-11-06 22:00:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504773323] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:02,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:00:02,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-11-06 22:00:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034128859] [2023-11-06 22:00:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:02,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:00:02,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:02,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:00:02,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:00:02,604 INFO L87 Difference]: Start difference. First operand 7190 states and 11931 transitions. Second operand has 6 states, 6 states have (on average 210.5) internal successors, (1263), 6 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:02,917 INFO L93 Difference]: Finished difference Result 33112 states and 54986 transitions. [2023-11-06 22:00:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:00:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 210.5) internal successors, (1263), 6 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1263 [2023-11-06 22:00:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:02,948 INFO L225 Difference]: With dead ends: 33112 [2023-11-06 22:00:02,948 INFO L226 Difference]: Without dead ends: 26023 [2023-11-06 22:00:02,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2530 GetRequests, 2514 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:00:02,962 INFO L413 NwaCegarLoop]: 5894 mSDtfsCounter, 12028 mSDsluCounter, 17426 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12028 SdHoareTripleChecker+Valid, 23320 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:02,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12028 Valid, 23320 Invalid, 56 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26023 states. [2023-11-06 22:00:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26023 to 7400. [2023-11-06 22:00:03,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 7399 states have (on average 1.6592782808487634) internal successors, (12277), 7399 states have internal predecessors, (12277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 12277 transitions. [2023-11-06 22:00:03,181 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 12277 transitions. Word has length 1263 [2023-11-06 22:00:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:03,182 INFO L495 AbstractCegarLoop]: Abstraction has 7400 states and 12277 transitions. [2023-11-06 22:00:03,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.5) internal successors, (1263), 6 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 12277 transitions. [2023-11-06 22:00:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1265 [2023-11-06 22:00:03,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:03,208 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:03,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:03,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:00:03,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:03,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash 103688505, now seen corresponding path program 1 times [2023-11-06 22:00:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115979086] [2023-11-06 22:00:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:03,560 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:03,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299209976] [2023-11-06 22:00:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:03,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:03,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:03,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:03,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:00:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:05,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 5766 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:00:05,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:05,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:05,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115979086] [2023-11-06 22:00:05,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299209976] [2023-11-06 22:00:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299209976] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:05,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:05,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:00:05,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18113935] [2023-11-06 22:00:05,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:05,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:00:05,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:00:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:00:05,466 INFO L87 Difference]: Start difference. First operand 7400 states and 12277 transitions. Second operand has 9 states, 9 states have (on average 140.44444444444446) internal successors, (1264), 9 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:09,316 INFO L93 Difference]: Finished difference Result 19474 states and 32296 transitions. [2023-11-06 22:00:09,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:00:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 140.44444444444446) internal successors, (1264), 9 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1264 [2023-11-06 22:00:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:09,327 INFO L225 Difference]: With dead ends: 19474 [2023-11-06 22:00:09,327 INFO L226 Difference]: Without dead ends: 12175 [2023-11-06 22:00:09,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1268 GetRequests, 1257 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:00:09,334 INFO L413 NwaCegarLoop]: 2573 mSDtfsCounter, 13037 mSDsluCounter, 12511 mSDsCounter, 0 mSdLazyCounter, 5502 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13037 SdHoareTripleChecker+Valid, 15084 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:09,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13037 Valid, 15084 Invalid, 5504 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 5502 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-06 22:00:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12175 states. [2023-11-06 22:00:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12175 to 7408. [2023-11-06 22:00:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7408 states, 7407 states have (on average 1.6585662211421628) internal successors, (12285), 7407 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7408 states to 7408 states and 12285 transitions. [2023-11-06 22:00:09,485 INFO L78 Accepts]: Start accepts. Automaton has 7408 states and 12285 transitions. Word has length 1264 [2023-11-06 22:00:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:09,486 INFO L495 AbstractCegarLoop]: Abstraction has 7408 states and 12285 transitions. [2023-11-06 22:00:09,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.44444444444446) internal successors, (1264), 9 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 7408 states and 12285 transitions. [2023-11-06 22:00:09,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1266 [2023-11-06 22:00:09,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:09,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:09,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:00:09,733 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:09,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:09,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1170708231, now seen corresponding path program 1 times [2023-11-06 22:00:09,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353108856] [2023-11-06 22:00:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:09,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:09,884 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:09,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362381487] [2023-11-06 22:00:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:09,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:09,886 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:09,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:00:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:11,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 5769 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:00:11,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:14,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353108856] [2023-11-06 22:00:14,538 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:14,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362381487] [2023-11-06 22:00:14,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362381487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:14,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:14,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:00:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713380258] [2023-11-06 22:00:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:00:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:00:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:14,543 INFO L87 Difference]: Start difference. First operand 7408 states and 12285 transitions. Second operand has 7 states, 7 states have (on average 180.71428571428572) internal successors, (1265), 7 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:22,335 INFO L93 Difference]: Finished difference Result 25706 states and 42654 transitions. [2023-11-06 22:00:22,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:00:22,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 180.71428571428572) internal successors, (1265), 7 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1265 [2023-11-06 22:00:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:22,351 INFO L225 Difference]: With dead ends: 25706 [2023-11-06 22:00:22,352 INFO L226 Difference]: Without dead ends: 18399 [2023-11-06 22:00:22,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1260 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:00:22,358 INFO L413 NwaCegarLoop]: 7985 mSDtfsCounter, 7319 mSDsluCounter, 24309 mSDsCounter, 0 mSdLazyCounter, 9736 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7319 SdHoareTripleChecker+Valid, 32294 SdHoareTripleChecker+Invalid, 9739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7319 Valid, 32294 Invalid, 9739 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 9736 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-11-06 22:00:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18399 states. [2023-11-06 22:00:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18399 to 12089. [2023-11-06 22:00:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12089 states, 12088 states have (on average 1.6597452018530774) internal successors, (20063), 12088 states have internal predecessors, (20063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12089 states to 12089 states and 20063 transitions. [2023-11-06 22:00:22,541 INFO L78 Accepts]: Start accepts. Automaton has 12089 states and 20063 transitions. Word has length 1265 [2023-11-06 22:00:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:22,542 INFO L495 AbstractCegarLoop]: Abstraction has 12089 states and 20063 transitions. [2023-11-06 22:00:22,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.71428571428572) internal successors, (1265), 7 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 12089 states and 20063 transitions. [2023-11-06 22:00:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1266 [2023-11-06 22:00:22,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:22,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:22,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:22,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:00:22,776 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:22,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:22,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1920756037, now seen corresponding path program 1 times [2023-11-06 22:00:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:22,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638466101] [2023-11-06 22:00:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:22,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:22,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744391342] [2023-11-06 22:00:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:22,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:22,945 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:22,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:00:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:24,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 5770 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:00:24,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:27,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:27,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638466101] [2023-11-06 22:00:27,423 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744391342] [2023-11-06 22:00:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744391342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:27,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:27,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:00:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143951695] [2023-11-06 22:00:27,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:27,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:00:27,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:27,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:00:27,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:00:27,429 INFO L87 Difference]: Start difference. First operand 12089 states and 20063 transitions. Second operand has 6 states, 6 states have (on average 210.83333333333334) internal successors, (1265), 6 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:30,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:30,875 INFO L93 Difference]: Finished difference Result 27603 states and 45820 transitions. [2023-11-06 22:00:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:00:30,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 210.83333333333334) internal successors, (1265), 6 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1265 [2023-11-06 22:00:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:30,889 INFO L225 Difference]: With dead ends: 27603 [2023-11-06 22:00:30,889 INFO L226 Difference]: Without dead ends: 15615 [2023-11-06 22:00:30,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1266 GetRequests, 1260 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:30,896 INFO L413 NwaCegarLoop]: 4057 mSDtfsCounter, 4535 mSDsluCounter, 10321 mSDsCounter, 0 mSdLazyCounter, 4384 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4535 SdHoareTripleChecker+Valid, 14378 SdHoareTripleChecker+Invalid, 4386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:30,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4535 Valid, 14378 Invalid, 4386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4384 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:00:30,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15615 states. [2023-11-06 22:00:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15615 to 15017. [2023-11-06 22:00:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15017 states, 15016 states have (on average 1.6602290889717635) internal successors, (24930), 15016 states have internal predecessors, (24930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15017 states to 15017 states and 24930 transitions. [2023-11-06 22:00:31,048 INFO L78 Accepts]: Start accepts. Automaton has 15017 states and 24930 transitions. Word has length 1265 [2023-11-06 22:00:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:31,049 INFO L495 AbstractCegarLoop]: Abstraction has 15017 states and 24930 transitions. [2023-11-06 22:00:31,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 210.83333333333334) internal successors, (1265), 6 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15017 states and 24930 transitions. [2023-11-06 22:00:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1267 [2023-11-06 22:00:31,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:31,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:31,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:31,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:00:31,277 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:31,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:31,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1634641415, now seen corresponding path program 1 times [2023-11-06 22:00:31,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:31,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303237888] [2023-11-06 22:00:31,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:31,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:31,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:31,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401894033] [2023-11-06 22:00:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:31,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:31,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:31,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:00:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:33,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 5772 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:00:33,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:35,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:35,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303237888] [2023-11-06 22:00:35,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401894033] [2023-11-06 22:00:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401894033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:35,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:35,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:00:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238890576] [2023-11-06 22:00:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:00:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:00:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:35,327 INFO L87 Difference]: Start difference. First operand 15017 states and 24930 transitions. Second operand has 7 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:41,086 INFO L93 Difference]: Finished difference Result 48613 states and 80735 transitions. [2023-11-06 22:00:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:00:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1266 [2023-11-06 22:00:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:41,104 INFO L225 Difference]: With dead ends: 48613 [2023-11-06 22:00:41,105 INFO L226 Difference]: Without dead ends: 25355 [2023-11-06 22:00:41,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 1261 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:00:41,112 INFO L413 NwaCegarLoop]: 4397 mSDtfsCounter, 8852 mSDsluCounter, 15369 mSDsCounter, 0 mSdLazyCounter, 6460 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8852 SdHoareTripleChecker+Valid, 19766 SdHoareTripleChecker+Invalid, 6463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:41,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8852 Valid, 19766 Invalid, 6463 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 6460 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 22:00:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25355 states. [2023-11-06 22:00:41,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25355 to 17042. [2023-11-06 22:00:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17042 states, 17041 states have (on average 1.6599377970776363) internal successors, (28287), 17041 states have internal predecessors, (28287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17042 states to 17042 states and 28287 transitions. [2023-11-06 22:00:41,322 INFO L78 Accepts]: Start accepts. Automaton has 17042 states and 28287 transitions. Word has length 1266 [2023-11-06 22:00:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:41,323 INFO L495 AbstractCegarLoop]: Abstraction has 17042 states and 28287 transitions. [2023-11-06 22:00:41,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.85714285714286) internal successors, (1266), 7 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:00:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 17042 states and 28287 transitions. [2023-11-06 22:00:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2023-11-06 22:00:41,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:41,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:41,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:00:41,569 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:41,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash 738879005, now seen corresponding path program 1 times [2023-11-06 22:00:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:41,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546085272] [2023-11-06 22:00:41,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:41,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:41,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:41,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946024015] [2023-11-06 22:00:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:41,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:41,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:41,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:41,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:00:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:43,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 5775 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-06 22:00:43,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:00:45,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:45,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546085272] [2023-11-06 22:00:45,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:45,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946024015] [2023-11-06 22:00:45,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946024015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:45,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:45,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2023-11-06 22:00:45,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808092003] [2023-11-06 22:00:45,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:45,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 22:00:45,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:45,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 22:00:45,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:00:45,463 INFO L87 Difference]: Start difference. First operand 17042 states and 28287 transitions. Second operand has 21 states, 21 states have (on average 60.333333333333336) internal successors, (1267), 21 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:16,264 INFO L93 Difference]: Finished difference Result 112643 states and 187007 transitions. [2023-11-06 22:01:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:01:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 60.333333333333336) internal successors, (1267), 21 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1267 [2023-11-06 22:01:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:16,331 INFO L225 Difference]: With dead ends: 112643 [2023-11-06 22:01:16,331 INFO L226 Difference]: Without dead ends: 95702 [2023-11-06 22:01:16,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1284 GetRequests, 1247 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:01:16,345 INFO L413 NwaCegarLoop]: 13658 mSDtfsCounter, 40500 mSDsluCounter, 153707 mSDsCounter, 0 mSdLazyCounter, 42625 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40500 SdHoareTripleChecker+Valid, 167365 SdHoareTripleChecker+Invalid, 42772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.6s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 42625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:16,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40500 Valid, 167365 Invalid, 42772 Unknown, 0 Unchecked, 0.6s Time], IncrementalHoareTripleChecker [147 Valid, 42625 Invalid, 0 Unknown, 0 Unchecked, 26.8s Time] [2023-11-06 22:01:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95702 states. [2023-11-06 22:01:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95702 to 18432. [2023-11-06 22:01:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18432 states, 18431 states have (on average 1.6569909391785578) internal successors, (30540), 18431 states have internal predecessors, (30540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18432 states to 18432 states and 30540 transitions. [2023-11-06 22:01:16,859 INFO L78 Accepts]: Start accepts. Automaton has 18432 states and 30540 transitions. Word has length 1267 [2023-11-06 22:01:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:16,860 INFO L495 AbstractCegarLoop]: Abstraction has 18432 states and 30540 transitions. [2023-11-06 22:01:16,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.333333333333336) internal successors, (1267), 21 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,860 INFO L276 IsEmpty]: Start isEmpty. Operand 18432 states and 30540 transitions. [2023-11-06 22:01:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1268 [2023-11-06 22:01:16,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:16,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:16,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:17,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:17,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:17,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash 646054101, now seen corresponding path program 1 times [2023-11-06 22:01:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:17,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347510785] [2023-11-06 22:01:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:17,239 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:17,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430894377] [2023-11-06 22:01:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:17,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:17,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:17,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:17,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7651de5b-9ce0-4d69-8641-c718f1d6d5b3/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:01:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:18,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 5774 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-06 22:01:18,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:21,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:21,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347510785] [2023-11-06 22:01:21,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430894377] [2023-11-06 22:01:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430894377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:21,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:21,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2023-11-06 22:01:21,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484698280] [2023-11-06 22:01:21,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:01:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:01:21,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:01:21,294 INFO L87 Difference]: Start difference. First operand 18432 states and 30540 transitions. Second operand has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)