./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/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_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e1fa75596dd4a8d087ff959d2eea13841816935af8426327d316b65266b0a5e8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:13,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:13,307 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:13,312 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:13,312 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:13,339 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:13,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:13,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:13,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:13,342 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:13,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:13,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:13,344 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:13,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:13,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:13,346 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:13,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:13,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:13,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:13,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:13,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:13,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:13,350 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:13,350 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:13,351 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:13,351 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:13,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:13,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:13,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:13,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:13,354 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:13,354 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:13,355 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:13,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:13,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:13,356 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:13,374 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:13,374 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:13,375 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:13,375 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_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1fa75596dd4a8d087ff959d2eea13841816935af8426327d316b65266b0a5e8 [2023-11-06 22:00:13,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:13,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:13,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:13,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:13,737 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:13,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i [2023-11-06 22:00:16,891 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:00:17,216 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:00:17,217 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i [2023-11-06 22:00:17,235 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/data/7999564dc/2e717bbdaf794c75aa4fe6177a2a38c0/FLAG50a435dc4 [2023-11-06 22:00:17,251 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/data/7999564dc/2e717bbdaf794c75aa4fe6177a2a38c0 [2023-11-06 22:00:17,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:00:17,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:00:17,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:17,258 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:00:17,264 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:00:17,265 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,266 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33cac8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:17, skipping insertion in model container [2023-11-06 22:00:17,266 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:17" (1/1) ... [2023-11-06 22:00:17,343 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:00:17,531 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_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i[916,929] [2023-11-06 22:00:17,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:17,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:00:17,961 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_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-45.i[916,929] [2023-11-06 22:00:18,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:18,223 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:00:18,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18 WrapperNode [2023-11-06 22:00:18,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:18,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:18,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:00:18,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:00:18,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,275 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,528 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 697 [2023-11-06 22:00:18,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:18,530 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:00:18,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:00:18,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:00:18,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,575 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,626 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:00:18,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:00:18,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:00:18,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:00:18,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (1/1) ... [2023-11-06 22:00:18,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:18,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:00:18,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:00:18,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:00:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:00:18,819 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:00:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:00:18,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:00:18,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:00:18,980 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:00:18,982 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:00:20,468 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:00:20,487 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:00:20,487 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:00:20,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:20 BoogieIcfgContainer [2023-11-06 22:00:20,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:00:20,498 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:00:20,498 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:00:20,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:00:20,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:00:17" (1/3) ... [2023-11-06 22:00:20,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234701ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:20, skipping insertion in model container [2023-11-06 22:00:20,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:18" (2/3) ... [2023-11-06 22:00:20,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234701ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:20, skipping insertion in model container [2023-11-06 22:00:20,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:20" (3/3) ... [2023-11-06 22:00:20,506 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-45.i [2023-11-06 22:00:20,526 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:00:20,527 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:00:20,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:00:20,604 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;@643903b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:00:20,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:00:20,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 198 states have (on average 1.5606060606060606) internal successors, (309), 199 states have internal predecessors, (309), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-06 22:00:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-06 22:00:20,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:20,648 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:20,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:20,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 735214360, now seen corresponding path program 1 times [2023-11-06 22:00:20,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:20,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427003171] [2023-11-06 22:00:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:20,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:21,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:21,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427003171] [2023-11-06 22:00:21,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:00:21,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822499025] [2023-11-06 22:00:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:21,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:21,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:21,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:21,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:00:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:21,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:00:21,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 7688 trivial. 0 not checked. [2023-11-06 22:00:21,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822499025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:21,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:21,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:00:21,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177058176] [2023-11-06 22:00:21,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:21,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:00:21,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:00:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:21,922 INFO L87 Difference]: Start difference. First operand has 264 states, 198 states have (on average 1.5606060606060606) internal successors, (309), 199 states have internal predecessors, (309), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:00:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:21,988 INFO L93 Difference]: Finished difference Result 521 states and 927 transitions. [2023-11-06 22:00:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:00:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 452 [2023-11-06 22:00:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:22,003 INFO L225 Difference]: With dead ends: 521 [2023-11-06 22:00:22,004 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 22:00:22,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:22,014 INFO L413 NwaCegarLoop]: 427 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:22,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 22:00:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2023-11-06 22:00:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 195 states have (on average 1.5435897435897437) internal successors, (301), 195 states have internal predecessors, (301), 63 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-06 22:00:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 427 transitions. [2023-11-06 22:00:22,097 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 427 transitions. Word has length 452 [2023-11-06 22:00:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:22,098 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 427 transitions. [2023-11-06 22:00:22,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (63), 2 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:00:22,099 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 427 transitions. [2023-11-06 22:00:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:00:22,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:22,113 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:22,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:00:22,322 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:22,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 596785214, now seen corresponding path program 1 times [2023-11-06 22:00:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:22,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397131223] [2023-11-06 22:00:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:22,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:22,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247919535] [2023-11-06 22:00:22,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:22,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:22,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:22,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:22,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:00:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:23,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 1225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:00:23,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:23,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:23,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397131223] [2023-11-06 22:00:23,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:23,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247919535] [2023-11-06 22:00:23,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247919535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:23,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:23,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:23,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533682629] [2023-11-06 22:00:23,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:00:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:23,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:00:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:23,189 INFO L87 Difference]: Start difference. First operand 260 states and 427 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:23,374 INFO L93 Difference]: Finished difference Result 680 states and 1119 transitions. [2023-11-06 22:00:23,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:00:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 453 [2023-11-06 22:00:23,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:23,388 INFO L225 Difference]: With dead ends: 680 [2023-11-06 22:00:23,389 INFO L226 Difference]: Without dead ends: 423 [2023-11-06 22:00:23,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:23,393 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 264 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:23,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 876 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-06 22:00:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 420. [2023-11-06 22:00:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 336 states have (on average 1.5744047619047619) internal successors, (529), 337 states have internal predecessors, (529), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 691 transitions. [2023-11-06 22:00:23,487 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 691 transitions. Word has length 453 [2023-11-06 22:00:23,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:23,492 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 691 transitions. [2023-11-06 22:00:23,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 691 transitions. [2023-11-06 22:00:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:00:23,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:23,501 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:23,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:23,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:23,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:23,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash -242248448, now seen corresponding path program 1 times [2023-11-06 22:00:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:23,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428898222] [2023-11-06 22:00:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:23,840 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:23,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939854014] [2023-11-06 22:00:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:23,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:23,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:00:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:24,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:00:24,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:24,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428898222] [2023-11-06 22:00:24,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:24,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939854014] [2023-11-06 22:00:24,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939854014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:24,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:24,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906489495] [2023-11-06 22:00:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:00:24,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:24,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:00:24,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:24,423 INFO L87 Difference]: Start difference. First operand 420 states and 691 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:24,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:24,581 INFO L93 Difference]: Finished difference Result 1230 states and 2025 transitions. [2023-11-06 22:00:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:00:24,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 453 [2023-11-06 22:00:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:24,596 INFO L225 Difference]: With dead ends: 1230 [2023-11-06 22:00:24,596 INFO L226 Difference]: Without dead ends: 813 [2023-11-06 22:00:24,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:24,601 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 395 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:24,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 1073 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-11-06 22:00:24,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 480. [2023-11-06 22:00:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 396 states have (on average 1.5782828282828283) internal successors, (625), 397 states have internal predecessors, (625), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 787 transitions. [2023-11-06 22:00:24,674 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 787 transitions. Word has length 453 [2023-11-06 22:00:24,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:24,676 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 787 transitions. [2023-11-06 22:00:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 787 transitions. [2023-11-06 22:00:24,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:24,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:24,684 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:24,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:24,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:24,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:24,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1775022104, now seen corresponding path program 1 times [2023-11-06 22:00:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:24,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281185160] [2023-11-06 22:00:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:24,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:25,025 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052402311] [2023-11-06 22:00:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:25,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:25,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:25,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:25,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:00:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:25,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:00:25,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:25,635 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:25,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:25,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281185160] [2023-11-06 22:00:25,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:25,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052402311] [2023-11-06 22:00:25,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052402311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:25,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:25,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248329160] [2023-11-06 22:00:25,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:25,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:00:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:25,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:00:25,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:25,640 INFO L87 Difference]: Start difference. First operand 480 states and 787 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:25,751 INFO L93 Difference]: Finished difference Result 1290 states and 2111 transitions. [2023-11-06 22:00:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:00:25,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:25,759 INFO L225 Difference]: With dead ends: 1290 [2023-11-06 22:00:25,760 INFO L226 Difference]: Without dead ends: 813 [2023-11-06 22:00:25,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:25,762 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 390 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:25,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 821 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2023-11-06 22:00:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 480. [2023-11-06 22:00:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 396 states have (on average 1.553030303030303) internal successors, (615), 397 states have internal predecessors, (615), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 777 transitions. [2023-11-06 22:00:25,815 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 777 transitions. Word has length 454 [2023-11-06 22:00:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:25,816 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 777 transitions. [2023-11-06 22:00:25,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 777 transitions. [2023-11-06 22:00:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:25,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:25,822 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:26,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:26,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:26,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash 491359082, now seen corresponding path program 1 times [2023-11-06 22:00:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351822981] [2023-11-06 22:00:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:26,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:26,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282543362] [2023-11-06 22:00:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:26,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:26,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:26,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:26,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:00:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:26,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:00:26,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:26,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351822981] [2023-11-06 22:00:26,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282543362] [2023-11-06 22:00:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282543362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136133797] [2023-11-06 22:00:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:00:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:26,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:00:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:26,788 INFO L87 Difference]: Start difference. First operand 480 states and 777 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:26,885 INFO L93 Difference]: Finished difference Result 1430 states and 2317 transitions. [2023-11-06 22:00:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:00:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:26,893 INFO L225 Difference]: With dead ends: 1430 [2023-11-06 22:00:26,894 INFO L226 Difference]: Without dead ends: 953 [2023-11-06 22:00:26,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:26,896 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 374 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1091 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-11-06 22:00:26,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 716. [2023-11-06 22:00:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 633 states have internal predecessors, (997), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1159 transitions. [2023-11-06 22:00:26,952 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1159 transitions. Word has length 454 [2023-11-06 22:00:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:26,953 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1159 transitions. [2023-11-06 22:00:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1159 transitions. [2023-11-06 22:00:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:26,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:26,959 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:26,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:27,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:27,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:27,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1626004120, now seen corresponding path program 1 times [2023-11-06 22:00:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:27,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129933235] [2023-11-06 22:00:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:27,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:27,262 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156540858] [2023-11-06 22:00:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:27,264 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:27,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:00:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:27,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:00:27,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:27,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129933235] [2023-11-06 22:00:27,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156540858] [2023-11-06 22:00:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156540858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:27,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:27,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:27,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783595794] [2023-11-06 22:00:27,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:27,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:00:27,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:27,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:00:27,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:27,958 INFO L87 Difference]: Start difference. First operand 716 states and 1159 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:28,075 INFO L93 Difference]: Finished difference Result 2081 states and 3372 transitions. [2023-11-06 22:00:28,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:00:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:28,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:28,085 INFO L225 Difference]: With dead ends: 2081 [2023-11-06 22:00:28,085 INFO L226 Difference]: Without dead ends: 1368 [2023-11-06 22:00:28,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:00:28,088 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 314 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:28,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1060 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2023-11-06 22:00:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1142. [2023-11-06 22:00:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1058 states have (on average 1.6039697542533082) internal successors, (1697), 1059 states have internal predecessors, (1697), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 1859 transitions. [2023-11-06 22:00:28,155 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 1859 transitions. Word has length 454 [2023-11-06 22:00:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:28,156 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 1859 transitions. [2023-11-06 22:00:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:28,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 1859 transitions. [2023-11-06 22:00:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:28,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:28,163 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:28,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:28,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:28,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:28,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2118630294, now seen corresponding path program 1 times [2023-11-06 22:00:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:28,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154583781] [2023-11-06 22:00:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:28,467 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:28,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470658536] [2023-11-06 22:00:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:28,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:28,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:28,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:28,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:00:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:28,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:00:28,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:29,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:29,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154583781] [2023-11-06 22:00:29,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:29,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470658536] [2023-11-06 22:00:29,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470658536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:29,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:29,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:29,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613399984] [2023-11-06 22:00:29,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:29,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:29,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:29,026 INFO L87 Difference]: Start difference. First operand 1142 states and 1859 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:29,564 INFO L93 Difference]: Finished difference Result 2232 states and 3612 transitions. [2023-11-06 22:00:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:00:29,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:29,572 INFO L225 Difference]: With dead ends: 2232 [2023-11-06 22:00:29,573 INFO L226 Difference]: Without dead ends: 1093 [2023-11-06 22:00:29,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:29,575 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 737 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:29,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 1865 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:00:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2023-11-06 22:00:29,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 916. [2023-11-06 22:00:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 832 states have (on average 1.5829326923076923) internal successors, (1317), 833 states have internal predecessors, (1317), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1479 transitions. [2023-11-06 22:00:29,634 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1479 transitions. Word has length 454 [2023-11-06 22:00:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:29,635 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1479 transitions. [2023-11-06 22:00:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1479 transitions. [2023-11-06 22:00:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:29,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:29,641 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:29,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:29,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:29,851 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:29,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1202124176, now seen corresponding path program 1 times [2023-11-06 22:00:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146912684] [2023-11-06 22:00:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:29,939 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:29,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544950934] [2023-11-06 22:00:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:29,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:29,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:29,941 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:29,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:00:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:30,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:00:30,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:30,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146912684] [2023-11-06 22:00:30,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544950934] [2023-11-06 22:00:30,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544950934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:30,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:30,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:30,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36319019] [2023-11-06 22:00:30,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:30,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:30,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:30,536 INFO L87 Difference]: Start difference. First operand 916 states and 1479 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:30,669 INFO L93 Difference]: Finished difference Result 3195 states and 5194 transitions. [2023-11-06 22:00:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:00:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:30,685 INFO L225 Difference]: With dead ends: 3195 [2023-11-06 22:00:30,685 INFO L226 Difference]: Without dead ends: 2282 [2023-11-06 22:00:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:30,688 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 644 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:30,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 1370 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2023-11-06 22:00:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1108. [2023-11-06 22:00:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1024 states have (on average 1.55859375) internal successors, (1596), 1025 states have internal predecessors, (1596), 81 states have call successors, (81), 2 states have call predecessors, (81), 2 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-11-06 22:00:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1758 transitions. [2023-11-06 22:00:30,762 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1758 transitions. Word has length 454 [2023-11-06 22:00:30,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 1108 states and 1758 transitions. [2023-11-06 22:00:30,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1758 transitions. [2023-11-06 22:00:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:30,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:30,769 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:30,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:30,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:30,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:30,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1936912517, now seen corresponding path program 1 times [2023-11-06 22:00:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539377327] [2023-11-06 22:00:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:31,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:31,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643567] [2023-11-06 22:00:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:31,113 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:31,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:00:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:31,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:00:31,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:32,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539377327] [2023-11-06 22:00:32,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:32,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643567] [2023-11-06 22:00:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:32,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:32,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:32,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962042450] [2023-11-06 22:00:32,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:32,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:32,322 INFO L87 Difference]: Start difference. First operand 1108 states and 1758 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:32,972 INFO L93 Difference]: Finished difference Result 5244 states and 8328 transitions. [2023-11-06 22:00:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:00:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 454 [2023-11-06 22:00:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:33,001 INFO L225 Difference]: With dead ends: 5244 [2023-11-06 22:00:33,001 INFO L226 Difference]: Without dead ends: 4139 [2023-11-06 22:00:33,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:33,006 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 1031 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:33,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1249 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:33,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2023-11-06 22:00:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 2217. [2023-11-06 22:00:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2050 states have (on average 1.5473170731707317) internal successors, (3172), 2052 states have internal predecessors, (3172), 162 states have call successors, (162), 4 states have call predecessors, (162), 4 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-06 22:00:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 3496 transitions. [2023-11-06 22:00:33,151 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 3496 transitions. Word has length 454 [2023-11-06 22:00:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:33,152 INFO L495 AbstractCegarLoop]: Abstraction has 2217 states and 3496 transitions. [2023-11-06 22:00:33,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 3496 transitions. [2023-11-06 22:00:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-06 22:00:33,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:33,161 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:33,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:33,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:33,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:33,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1908412227, now seen corresponding path program 1 times [2023-11-06 22:00:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481855107] [2023-11-06 22:00:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:33,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:33,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711164881] [2023-11-06 22:00:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:33,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:33,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:33,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:00:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:34,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:00:34,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 546 proven. 180 refuted. 0 times theorem prover too weak. 7086 trivial. 0 not checked. [2023-11-06 22:00:34,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 6 proven. 180 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-06 22:00:35,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481855107] [2023-11-06 22:00:35,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711164881] [2023-11-06 22:00:35,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711164881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:35,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:35,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:00:35,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765421115] [2023-11-06 22:00:35,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:35,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:00:35,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:00:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:35,347 INFO L87 Difference]: Start difference. First operand 2217 states and 3496 transitions. Second operand has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-06 22:00:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:35,984 INFO L93 Difference]: Finished difference Result 4451 states and 7005 transitions. [2023-11-06 22:00:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:00:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) Word has length 454 [2023-11-06 22:00:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:36,002 INFO L225 Difference]: With dead ends: 4451 [2023-11-06 22:00:36,003 INFO L226 Difference]: Without dead ends: 2237 [2023-11-06 22:00:36,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 910 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:00:36,008 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 439 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 898 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:36,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2023-11-06 22:00:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2233. [2023-11-06 22:00:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2062 states have (on average 1.5179437439379244) internal successors, (3130), 2064 states have internal predecessors, (3130), 162 states have call successors, (162), 8 states have call predecessors, (162), 8 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-06 22:00:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 3454 transitions. [2023-11-06 22:00:36,167 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 3454 transitions. Word has length 454 [2023-11-06 22:00:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:36,168 INFO L495 AbstractCegarLoop]: Abstraction has 2233 states and 3454 transitions. [2023-11-06 22:00:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.5) internal successors, (228), 8 states have internal predecessors, (228), 3 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 3 states have call predecessors, (124), 3 states have call successors, (124) [2023-11-06 22:00:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 3454 transitions. [2023-11-06 22:00:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:00:36,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:36,176 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:36,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:36,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:00:36,388 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:36,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:36,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1476118149, now seen corresponding path program 1 times [2023-11-06 22:00:36,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:36,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871543278] [2023-11-06 22:00:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:36,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:36,476 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:36,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678545383] [2023-11-06 22:00:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:36,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:36,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:36,478 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:36,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:00:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:37,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:00:37,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 2976 proven. 45 refuted. 0 times theorem prover too weak. 4791 trivial. 0 not checked. [2023-11-06 22:00:37,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 141 proven. 45 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-06 22:00:37,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871543278] [2023-11-06 22:00:37,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:37,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678545383] [2023-11-06 22:00:37,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678545383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:37,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:37,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 22:00:37,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585445155] [2023-11-06 22:00:37,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:37,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:00:37,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:37,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:00:37,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:00:37,611 INFO L87 Difference]: Start difference. First operand 2233 states and 3454 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-06 22:00:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:38,754 INFO L93 Difference]: Finished difference Result 4259 states and 6635 transitions. [2023-11-06 22:00:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:00:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) Word has length 455 [2023-11-06 22:00:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:38,768 INFO L225 Difference]: With dead ends: 4259 [2023-11-06 22:00:38,768 INFO L226 Difference]: Without dead ends: 2029 [2023-11-06 22:00:38,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 920 GetRequests, 901 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-06 22:00:38,773 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 603 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:38,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1346 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:00:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2023-11-06 22:00:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1857. [2023-11-06 22:00:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1684 states have (on average 1.520190023752969) internal successors, (2560), 1686 states have internal predecessors, (2560), 162 states have call successors, (162), 10 states have call predecessors, (162), 10 states have return successors, (162), 160 states have call predecessors, (162), 162 states have call successors, (162) [2023-11-06 22:00:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2884 transitions. [2023-11-06 22:00:38,901 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2884 transitions. Word has length 455 [2023-11-06 22:00:38,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:38,902 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2884 transitions. [2023-11-06 22:00:38,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 2 states have call successors, (78), 2 states have call predecessors, (78), 4 states have return successors, (79), 2 states have call predecessors, (79), 2 states have call successors, (79) [2023-11-06 22:00:38,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2884 transitions. [2023-11-06 22:00:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:00:38,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:38,910 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:38,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:39,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:00:39,119 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:39,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:39,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1399217351, now seen corresponding path program 1 times [2023-11-06 22:00:39,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:39,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16060484] [2023-11-06 22:00:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:39,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:39,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:39,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2002924837] [2023-11-06 22:00:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:39,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:39,223 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:39,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:00:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:39,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:00:39,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:40,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:40,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:40,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16060484] [2023-11-06 22:00:40,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:40,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002924837] [2023-11-06 22:00:40,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002924837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:40,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:40,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:00:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620113908] [2023-11-06 22:00:40,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:40,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:00:40,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:40,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:00:40,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:00:40,575 INFO L87 Difference]: Start difference. First operand 1857 states and 2884 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:41,775 INFO L93 Difference]: Finished difference Result 8345 states and 12964 transitions. [2023-11-06 22:00:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:00:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 455 [2023-11-06 22:00:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:41,824 INFO L225 Difference]: With dead ends: 8345 [2023-11-06 22:00:41,824 INFO L226 Difference]: Without dead ends: 6491 [2023-11-06 22:00:41,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:00:41,831 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 4964 mSDsluCounter, 1892 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4964 SdHoareTripleChecker+Valid, 2400 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:41,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4964 Valid, 2400 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 22:00:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2023-11-06 22:00:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 1675. [2023-11-06 22:00:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1540 states have (on average 1.5207792207792208) internal successors, (2342), 1540 states have internal predecessors, (2342), 126 states have call successors, (126), 8 states have call predecessors, (126), 8 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2023-11-06 22:00:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2594 transitions. [2023-11-06 22:00:42,001 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2594 transitions. Word has length 455 [2023-11-06 22:00:42,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:42,003 INFO L495 AbstractCegarLoop]: Abstraction has 1675 states and 2594 transitions. [2023-11-06 22:00:42,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2594 transitions. [2023-11-06 22:00:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2023-11-06 22:00:42,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:42,010 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:42,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:42,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:00:42,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:42,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:42,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1533230857, now seen corresponding path program 1 times [2023-11-06 22:00:42,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:42,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702538066] [2023-11-06 22:00:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:42,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:42,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:42,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894655707] [2023-11-06 22:00:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:42,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:42,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:42,350 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:42,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:00:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:42,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:00:42,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 62 proven. 186 refuted. 0 times theorem prover too weak. 7564 trivial. 0 not checked. [2023-11-06 22:00:44,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:46,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702538066] [2023-11-06 22:00:46,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:46,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894655707] [2023-11-06 22:00:46,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894655707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:00:46,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:00:46,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-11-06 22:00:46,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060954284] [2023-11-06 22:00:46,570 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:46,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:00:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:46,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:00:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:00:46,573 INFO L87 Difference]: Start difference. First operand 1675 states and 2594 transitions. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:00:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:49,539 INFO L93 Difference]: Finished difference Result 7759 states and 12040 transitions. [2023-11-06 22:00:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:00:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) Word has length 455 [2023-11-06 22:00:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:49,575 INFO L225 Difference]: With dead ends: 7759 [2023-11-06 22:00:49,575 INFO L226 Difference]: Without dead ends: 6087 [2023-11-06 22:00:49,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:00:49,582 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1320 mSDsluCounter, 3918 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1320 SdHoareTripleChecker+Valid, 4288 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:49,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1320 Valid, 4288 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:00:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6087 states. [2023-11-06 22:00:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 3179. [2023-11-06 22:00:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 2976 states have (on average 1.521505376344086) internal successors, (4528), 2976 states have internal predecessors, (4528), 189 states have call successors, (189), 13 states have call predecessors, (189), 13 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-06 22:00:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 4906 transitions. [2023-11-06 22:00:49,836 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 4906 transitions. Word has length 455 [2023-11-06 22:00:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:49,837 INFO L495 AbstractCegarLoop]: Abstraction has 3179 states and 4906 transitions. [2023-11-06 22:00:49,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 9 states have internal predecessors, (146), 2 states have call successors, (63), 2 states have call predecessors, (63), 2 states have return successors, (63), 1 states have call predecessors, (63), 2 states have call successors, (63) [2023-11-06 22:00:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 4906 transitions. [2023-11-06 22:00:49,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2023-11-06 22:00:49,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:49,849 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:49,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:50,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:00:50,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:50,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash 492766544, now seen corresponding path program 1 times [2023-11-06 22:00:50,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:50,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729517245] [2023-11-06 22:00:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:50,196 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049446531] [2023-11-06 22:00:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:50,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:50,198 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:50,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:00:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:50,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:00:50,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 1418 proven. 168 refuted. 0 times theorem prover too weak. 6226 trivial. 0 not checked. [2023-11-06 22:00:51,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:00:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 18 proven. 168 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-06 22:00:52,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729517245] [2023-11-06 22:00:52,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:52,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049446531] [2023-11-06 22:00:52,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049446531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:00:52,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:00:52,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2023-11-06 22:00:52,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63251382] [2023-11-06 22:00:52,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:00:52,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:00:52,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:52,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:00:52,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:00:52,237 INFO L87 Difference]: Start difference. First operand 3179 states and 4906 transitions. Second operand has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 4 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-06 22:00:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:52,909 INFO L93 Difference]: Finished difference Result 5503 states and 8542 transitions. [2023-11-06 22:00:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:00:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 4 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) Word has length 456 [2023-11-06 22:00:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:52,925 INFO L225 Difference]: With dead ends: 5503 [2023-11-06 22:00:52,925 INFO L226 Difference]: Without dead ends: 3203 [2023-11-06 22:00:52,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 915 GetRequests, 900 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:00:52,931 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 605 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:52,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1142 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:52,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2023-11-06 22:00:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 3191. [2023-11-06 22:00:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2985 states have (on average 1.5038525963149079) internal successors, (4489), 2985 states have internal predecessors, (4489), 189 states have call successors, (189), 16 states have call predecessors, (189), 16 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-06 22:00:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 4867 transitions. [2023-11-06 22:00:53,153 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 4867 transitions. Word has length 456 [2023-11-06 22:00:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:53,154 INFO L495 AbstractCegarLoop]: Abstraction has 3191 states and 4867 transitions. [2023-11-06 22:00:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 4 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 4 states have call predecessors, (120), 4 states have call successors, (120) [2023-11-06 22:00:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 4867 transitions. [2023-11-06 22:00:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-06 22:00:53,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:53,164 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:53,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:53,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:00:53,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:53,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:53,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1831647900, now seen corresponding path program 1 times [2023-11-06 22:00:53,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:53,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530872354] [2023-11-06 22:00:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:53,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:53,460 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:53,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139967902] [2023-11-06 22:00:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:53,462 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:53,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:00:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:54,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:00:54,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:54,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:54,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:54,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530872354] [2023-11-06 22:00:54,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:54,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139967902] [2023-11-06 22:00:54,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139967902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:54,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788454810] [2023-11-06 22:00:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:54,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:54,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:54,723 INFO L87 Difference]: Start difference. First operand 3191 states and 4867 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:55,373 INFO L93 Difference]: Finished difference Result 6277 states and 9601 transitions. [2023-11-06 22:00:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:00:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 457 [2023-11-06 22:00:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:55,386 INFO L225 Difference]: With dead ends: 6277 [2023-11-06 22:00:55,386 INFO L226 Difference]: Without dead ends: 4597 [2023-11-06 22:00:55,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:55,391 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 452 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:55,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1214 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2023-11-06 22:00:55,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 4557. [2023-11-06 22:00:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4351 states have (on average 1.5148241783498047) internal successors, (6591), 4351 states have internal predecessors, (6591), 189 states have call successors, (189), 16 states have call predecessors, (189), 16 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-06 22:00:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 6969 transitions. [2023-11-06 22:00:55,631 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 6969 transitions. Word has length 457 [2023-11-06 22:00:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:55,632 INFO L495 AbstractCegarLoop]: Abstraction has 4557 states and 6969 transitions. [2023-11-06 22:00:55,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 6969 transitions. [2023-11-06 22:00:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2023-11-06 22:00:55,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:55,643 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:55,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:55,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:00:55,854 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:55,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1734367813, now seen corresponding path program 1 times [2023-11-06 22:00:55,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:55,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823431363] [2023-11-06 22:00:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:55,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:55,924 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:55,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867907068] [2023-11-06 22:00:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:55,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:55,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:55,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:55,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:00:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:56,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:00:56,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:00:58,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:58,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823431363] [2023-11-06 22:00:58,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:58,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867907068] [2023-11-06 22:00:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867907068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:58,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:58,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:00:58,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549034745] [2023-11-06 22:00:58,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:58,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:00:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:58,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:00:58,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:58,041 INFO L87 Difference]: Start difference. First operand 4557 states and 6969 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:58,754 INFO L93 Difference]: Finished difference Result 9257 states and 14142 transitions. [2023-11-06 22:00:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:00:58,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 457 [2023-11-06 22:00:58,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:58,768 INFO L225 Difference]: With dead ends: 9257 [2023-11-06 22:00:58,768 INFO L226 Difference]: Without dead ends: 4831 [2023-11-06 22:00:58,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:58,775 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 393 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:58,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1490 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:00:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2023-11-06 22:00:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4557. [2023-11-06 22:00:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4351 states have (on average 1.514594346127327) internal successors, (6590), 4351 states have internal predecessors, (6590), 189 states have call successors, (189), 16 states have call predecessors, (189), 16 states have return successors, (189), 189 states have call predecessors, (189), 189 states have call successors, (189) [2023-11-06 22:00:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 6968 transitions. [2023-11-06 22:00:59,001 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 6968 transitions. Word has length 457 [2023-11-06 22:00:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:59,002 INFO L495 AbstractCegarLoop]: Abstraction has 4557 states and 6968 transitions. [2023-11-06 22:00:59,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:00:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 6968 transitions. [2023-11-06 22:00:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:00:59,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:59,013 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:59,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:59,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:00:59,225 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:59,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:59,226 INFO L85 PathProgramCache]: Analyzing trace with hash -829491368, now seen corresponding path program 1 times [2023-11-06 22:00:59,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:59,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863486646] [2023-11-06 22:00:59,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:59,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:59,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871733403] [2023-11-06 22:00:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:59,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:59,297 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:59,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:00:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:59,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:00:59,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:01:00,028 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:00,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:00,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863486646] [2023-11-06 22:01:00,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:00,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871733403] [2023-11-06 22:01:00,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871733403] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:00,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:00,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:01:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051661291] [2023-11-06 22:01:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:00,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:00,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:00,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:00,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:00,032 INFO L87 Difference]: Start difference. First operand 4557 states and 6968 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:01,029 INFO L93 Difference]: Finished difference Result 15421 states and 23814 transitions. [2023-11-06 22:01:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:01:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 458 [2023-11-06 22:01:01,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:01,059 INFO L225 Difference]: With dead ends: 15421 [2023-11-06 22:01:01,059 INFO L226 Difference]: Without dead ends: 11715 [2023-11-06 22:01:01,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:01,067 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 739 mSDsluCounter, 1027 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:01,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1569 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:01:01,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11715 states. [2023-11-06 22:01:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11715 to 9987. [2023-11-06 22:01:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9732 states have (on average 1.521167283189478) internal successors, (14804), 9734 states have internal predecessors, (14804), 229 states have call successors, (229), 25 states have call predecessors, (229), 25 states have return successors, (229), 227 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-06 22:01:01,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 15262 transitions. [2023-11-06 22:01:01,440 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 15262 transitions. Word has length 458 [2023-11-06 22:01:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:01,441 INFO L495 AbstractCegarLoop]: Abstraction has 9987 states and 15262 transitions. [2023-11-06 22:01:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 15262 transitions. [2023-11-06 22:01:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:01:01,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:01,459 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:01,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:01,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:01:01,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:01,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:01,670 INFO L85 PathProgramCache]: Analyzing trace with hash 557294042, now seen corresponding path program 1 times [2023-11-06 22:01:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946858866] [2023-11-06 22:01:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:01,752 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:01,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669014215] [2023-11-06 22:01:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:01,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:01,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:01,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:01:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:02,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:01:02,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3462 proven. 126 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2023-11-06 22:01:02,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 60 proven. 126 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2023-11-06 22:01:03,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:03,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946858866] [2023-11-06 22:01:03,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:03,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669014215] [2023-11-06 22:01:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669014215] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:03,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:01:03,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:01:03,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365390914] [2023-11-06 22:01:03,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:03,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:01:03,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:03,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:01:03,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:01:03,296 INFO L87 Difference]: Start difference. First operand 9987 states and 15262 transitions. Second operand has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-06 22:01:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:03,985 INFO L93 Difference]: Finished difference Result 13715 states and 20940 transitions. [2023-11-06 22:01:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:01:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 458 [2023-11-06 22:01:03,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:04,005 INFO L225 Difference]: With dead ends: 13715 [2023-11-06 22:01:04,005 INFO L226 Difference]: Without dead ends: 7011 [2023-11-06 22:01:04,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 908 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:01:04,016 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 665 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:04,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 968 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:01:04,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2023-11-06 22:01:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 6993. [2023-11-06 22:01:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6993 states, 6735 states have (on average 1.4950259836674091) internal successors, (10069), 6737 states have internal predecessors, (10069), 229 states have call successors, (229), 28 states have call predecessors, (229), 28 states have return successors, (229), 227 states have call predecessors, (229), 229 states have call successors, (229) [2023-11-06 22:01:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6993 states to 6993 states and 10527 transitions. [2023-11-06 22:01:04,287 INFO L78 Accepts]: Start accepts. Automaton has 6993 states and 10527 transitions. Word has length 458 [2023-11-06 22:01:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:04,288 INFO L495 AbstractCegarLoop]: Abstraction has 6993 states and 10527 transitions. [2023-11-06 22:01:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-06 22:01:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 6993 states and 10527 transitions. [2023-11-06 22:01:04,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:01:04,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:04,301 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:04,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:01:04,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:04,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1068005398, now seen corresponding path program 1 times [2023-11-06 22:01:04,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:04,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899120884] [2023-11-06 22:01:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:04,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:04,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76961322] [2023-11-06 22:01:04,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:04,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:01:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:05,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:01:05,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 126 proven. 366 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:01:07,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-06 22:01:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899120884] [2023-11-06 22:01:16,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76961322] [2023-11-06 22:01:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76961322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:16,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:01:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-06 22:01:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686051319] [2023-11-06 22:01:16,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:16,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 22:01:16,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 22:01:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:01:16,579 INFO L87 Difference]: Start difference. First operand 6993 states and 10527 transitions. Second operand has 30 states, 29 states have (on average 8.827586206896552) internal successors, (256), 28 states have internal predecessors, (256), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) [2023-11-06 22:01:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:38,630 INFO L93 Difference]: Finished difference Result 46831 states and 71259 transitions. [2023-11-06 22:01:38,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-11-06 22:01:38,631 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 8.827586206896552) internal successors, (256), 28 states have internal predecessors, (256), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) Word has length 458 [2023-11-06 22:01:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:38,718 INFO L225 Difference]: With dead ends: 46831 [2023-11-06 22:01:38,718 INFO L226 Difference]: Without dead ends: 42833 [2023-11-06 22:01:38,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 916 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8236 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3681, Invalid=18969, Unknown=0, NotChecked=0, Total=22650 [2023-11-06 22:01:38,741 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 10254 mSDsluCounter, 11364 mSDsCounter, 0 mSdLazyCounter, 7825 mSolverCounterSat, 1520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10257 SdHoareTripleChecker+Valid, 11897 SdHoareTripleChecker+Invalid, 9345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1520 IncrementalHoareTripleChecker+Valid, 7825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:38,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10257 Valid, 11897 Invalid, 9345 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1520 Valid, 7825 Invalid, 0 Unknown, 0 Unchecked, 15.5s Time] [2023-11-06 22:01:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42833 states. [2023-11-06 22:01:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42833 to 17965. [2023-11-06 22:01:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17965 states, 17405 states have (on average 1.4786555587474863) internal successors, (25736), 17411 states have internal predecessors, (25736), 478 states have call successors, (478), 81 states have call predecessors, (478), 81 states have return successors, (478), 472 states have call predecessors, (478), 478 states have call successors, (478) [2023-11-06 22:01:39,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17965 states to 17965 states and 26692 transitions. [2023-11-06 22:01:39,842 INFO L78 Accepts]: Start accepts. Automaton has 17965 states and 26692 transitions. Word has length 458 [2023-11-06 22:01:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:39,843 INFO L495 AbstractCegarLoop]: Abstraction has 17965 states and 26692 transitions. [2023-11-06 22:01:39,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 8.827586206896552) internal successors, (256), 28 states have internal predecessors, (256), 5 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 5 states have call successors, (126) [2023-11-06 22:01:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17965 states and 26692 transitions. [2023-11-06 22:01:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:01:39,874 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:39,874 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:39,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:40,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:40,089 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:40,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1517407382, now seen corresponding path program 1 times [2023-11-06 22:01:40,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:40,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220623032] [2023-11-06 22:01:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:40,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:40,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:40,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543752155] [2023-11-06 22:01:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:40,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:40,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:40,186 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:40,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:01:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:40,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:01:40,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:01:40,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:40,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220623032] [2023-11-06 22:01:40,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:40,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543752155] [2023-11-06 22:01:40,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543752155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:40,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:40,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:01:40,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866700778] [2023-11-06 22:01:40,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:40,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:01:40,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:01:40,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:01:40,988 INFO L87 Difference]: Start difference. First operand 17965 states and 26692 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:42,324 INFO L93 Difference]: Finished difference Result 29167 states and 43592 transitions. [2023-11-06 22:01:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:01:42,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 458 [2023-11-06 22:01:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:42,354 INFO L225 Difference]: With dead ends: 29167 [2023-11-06 22:01:42,355 INFO L226 Difference]: Without dead ends: 19152 [2023-11-06 22:01:42,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:42,373 INFO L413 NwaCegarLoop]: 611 mSDtfsCounter, 901 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:42,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [901 Valid, 1226 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:01:42,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19152 states. [2023-11-06 22:01:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19152 to 17813. [2023-11-06 22:01:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17813 states, 17253 states have (on average 1.4688459977974846) internal successors, (25342), 17259 states have internal predecessors, (25342), 478 states have call successors, (478), 81 states have call predecessors, (478), 81 states have return successors, (478), 472 states have call predecessors, (478), 478 states have call successors, (478) [2023-11-06 22:01:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17813 states to 17813 states and 26298 transitions. [2023-11-06 22:01:43,164 INFO L78 Accepts]: Start accepts. Automaton has 17813 states and 26298 transitions. Word has length 458 [2023-11-06 22:01:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:43,165 INFO L495 AbstractCegarLoop]: Abstraction has 17813 states and 26298 transitions. [2023-11-06 22:01:43,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 17813 states and 26298 transitions. [2023-11-06 22:01:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2023-11-06 22:01:43,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:43,184 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:43,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:43,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:43,393 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:43,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -598158122, now seen corresponding path program 1 times [2023-11-06 22:01:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:43,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828870935] [2023-11-06 22:01:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:43,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:43,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694968088] [2023-11-06 22:01:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:43,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:43,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:43,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:43,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:01:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:44,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:01:44,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:01:44,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:44,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828870935] [2023-11-06 22:01:44,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:44,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694968088] [2023-11-06 22:01:44,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694968088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:44,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:44,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:01:44,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468229461] [2023-11-06 22:01:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:44,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:01:44,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:44,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:01:44,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:01:44,730 INFO L87 Difference]: Start difference. First operand 17813 states and 26298 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:48,669 INFO L93 Difference]: Finished difference Result 64507 states and 95363 transitions. [2023-11-06 22:01:48,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:01:48,670 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 458 [2023-11-06 22:01:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:48,748 INFO L225 Difference]: With dead ends: 64507 [2023-11-06 22:01:48,748 INFO L226 Difference]: Without dead ends: 55913 [2023-11-06 22:01:48,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:01:48,763 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 2073 mSDsluCounter, 3386 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:48,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 4294 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:01:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55913 states. [2023-11-06 22:01:50,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55913 to 43209. [2023-11-06 22:01:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43209 states, 41677 states have (on average 1.4674280778366966) internal successors, (61158), 41695 states have internal predecessors, (61158), 1308 states have call successors, (1308), 223 states have call predecessors, (1308), 223 states have return successors, (1308), 1290 states have call predecessors, (1308), 1308 states have call successors, (1308) [2023-11-06 22:01:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43209 states to 43209 states and 63774 transitions. [2023-11-06 22:01:50,856 INFO L78 Accepts]: Start accepts. Automaton has 43209 states and 63774 transitions. Word has length 458 [2023-11-06 22:01:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:50,856 INFO L495 AbstractCegarLoop]: Abstraction has 43209 states and 63774 transitions. [2023-11-06 22:01:50,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:01:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 43209 states and 63774 transitions. [2023-11-06 22:01:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:01:50,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:50,883 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:01:50,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:51,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 22:01:51,093 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:51,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1226905052, now seen corresponding path program 1 times [2023-11-06 22:01:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:51,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762230299] [2023-11-06 22:01:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:51,166 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:01:51,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314625497] [2023-11-06 22:01:51,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:51,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:51,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:51,168 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:51,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:01:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:52,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:01:52,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 126 proven. 366 refuted. 0 times theorem prover too weak. 7320 trivial. 0 not checked. [2023-11-06 22:01:54,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 7443 trivial. 0 not checked. [2023-11-06 22:02:00,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762230299] [2023-11-06 22:02:00,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:00,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314625497] [2023-11-06 22:02:00,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314625497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:00,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:00,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2023-11-06 22:02:00,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038321930] [2023-11-06 22:02:00,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:00,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:02:00,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:00,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:02:00,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:02:00,282 INFO L87 Difference]: Start difference. First operand 43209 states and 63774 transitions. Second operand has 29 states, 28 states have (on average 9.357142857142858) internal successors, (262), 27 states have internal predecessors, (262), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-06 22:02:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:23,612 INFO L93 Difference]: Finished difference Result 123581 states and 182445 transitions. [2023-11-06 22:02:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-11-06 22:02:23,615 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 9.357142857142858) internal successors, (262), 27 states have internal predecessors, (262), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) Word has length 459 [2023-11-06 22:02:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:23,801 INFO L225 Difference]: With dead ends: 123581 [2023-11-06 22:02:23,801 INFO L226 Difference]: Without dead ends: 114322 [2023-11-06 22:02:23,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 908 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5070 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3262, Invalid=10078, Unknown=0, NotChecked=0, Total=13340 [2023-11-06 22:02:23,832 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 11391 mSDsluCounter, 8262 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11394 SdHoareTripleChecker+Valid, 8698 SdHoareTripleChecker+Invalid, 7024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:23,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11394 Valid, 8698 Invalid, 7024 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1079 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2023-11-06 22:02:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114322 states. [2023-11-06 22:02:27,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114322 to 57273. [2023-11-06 22:02:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57273 states, 54904 states have (on average 1.4648113070085969) internal successors, (80424), 54937 states have internal predecessors, (80424), 2009 states have call successors, (2009), 359 states have call predecessors, (2009), 359 states have return successors, (2009), 1976 states have call predecessors, (2009), 2009 states have call successors, (2009) [2023-11-06 22:02:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57273 states to 57273 states and 84442 transitions. [2023-11-06 22:02:28,078 INFO L78 Accepts]: Start accepts. Automaton has 57273 states and 84442 transitions. Word has length 459 [2023-11-06 22:02:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:28,079 INFO L495 AbstractCegarLoop]: Abstraction has 57273 states and 84442 transitions. [2023-11-06 22:02:28,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 9.357142857142858) internal successors, (262), 27 states have internal predecessors, (262), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 4 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-06 22:02:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 57273 states and 84442 transitions. [2023-11-06 22:02:28,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:02:28,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:28,311 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:28,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:28,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:02:28,522 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:28,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:28,523 INFO L85 PathProgramCache]: Analyzing trace with hash 746961767, now seen corresponding path program 1 times [2023-11-06 22:02:28,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:28,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088237611] [2023-11-06 22:02:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:28,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:28,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934337613] [2023-11-06 22:02:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:28,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:28,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:28,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:28,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:02:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:29,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:02:29,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 3850 proven. 447 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2023-11-06 22:02:32,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 93 proven. 456 refuted. 0 times theorem prover too weak. 7263 trivial. 0 not checked. [2023-11-06 22:02:44,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:44,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088237611] [2023-11-06 22:02:44,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934337613] [2023-11-06 22:02:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934337613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:44,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:44,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2023-11-06 22:02:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108314844] [2023-11-06 22:02:44,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 22:02:44,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:44,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 22:02:44,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:02:44,900 INFO L87 Difference]: Start difference. First operand 57273 states and 84442 transitions. Second operand has 36 states, 35 states have (on average 7.8) internal successors, (273), 34 states have internal predecessors, (273), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 6 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-06 22:03:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:34,772 INFO L93 Difference]: Finished difference Result 214659 states and 317648 transitions. [2023-11-06 22:03:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-11-06 22:03:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 7.8) internal successors, (273), 34 states have internal predecessors, (273), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 6 states have call predecessors, (126), 8 states have call successors, (126) Word has length 459 [2023-11-06 22:03:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:35,142 INFO L225 Difference]: With dead ends: 214659 [2023-11-06 22:03:35,142 INFO L226 Difference]: Without dead ends: 179866 [2023-11-06 22:03:35,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 905 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=5872, Invalid=25280, Unknown=0, NotChecked=0, Total=31152 [2023-11-06 22:03:35,184 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 12240 mSDsluCounter, 17413 mSDsCounter, 0 mSdLazyCounter, 11142 mSolverCounterSat, 1937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12244 SdHoareTripleChecker+Valid, 18287 SdHoareTripleChecker+Invalid, 13079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1937 IncrementalHoareTripleChecker+Valid, 11142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:35,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12244 Valid, 18287 Invalid, 13079 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1937 Valid, 11142 Invalid, 0 Unknown, 0 Unchecked, 27.7s Time] [2023-11-06 22:03:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179866 states. [2023-11-06 22:03:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179866 to 67297. [2023-11-06 22:03:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 65032 states have (on average 1.4684463033583466) internal successors, (95496), 65063 states have internal predecessors, (95496), 1893 states have call successors, (1893), 371 states have call predecessors, (1893), 371 states have return successors, (1893), 1862 states have call predecessors, (1893), 1893 states have call successors, (1893) [2023-11-06 22:03:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 99282 transitions. [2023-11-06 22:03:40,386 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 99282 transitions. Word has length 459 [2023-11-06 22:03:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:40,386 INFO L495 AbstractCegarLoop]: Abstraction has 67297 states and 99282 transitions. [2023-11-06 22:03:40,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 7.8) internal successors, (273), 34 states have internal predecessors, (273), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 6 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-06 22:03:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 99282 transitions. [2023-11-06 22:03:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:03:40,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:40,423 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:40,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:40,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:40,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:40,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -487408055, now seen corresponding path program 1 times [2023-11-06 22:03:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:40,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043821231] [2023-11-06 22:03:40,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:40,700 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:40,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665713753] [2023-11-06 22:03:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:40,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:40,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:40,702 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:03:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:41,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:03:41,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:03:41,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:41,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043821231] [2023-11-06 22:03:41,850 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:41,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665713753] [2023-11-06 22:03:41,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665713753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:41,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:41,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:03:41,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97101875] [2023-11-06 22:03:41,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:41,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:03:41,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:41,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:03:41,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:03:41,854 INFO L87 Difference]: Start difference. First operand 67297 states and 99282 transitions. Second operand has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:03:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:45,269 INFO L93 Difference]: Finished difference Result 112839 states and 166545 transitions. [2023-11-06 22:03:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:03:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) Word has length 459 [2023-11-06 22:03:45,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:45,403 INFO L225 Difference]: With dead ends: 112839 [2023-11-06 22:03:45,403 INFO L226 Difference]: Without dead ends: 68263 [2023-11-06 22:03:45,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:45,436 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 556 mSDsluCounter, 1214 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:45,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1625 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:03:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68263 states. [2023-11-06 22:03:49,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68263 to 67297. [2023-11-06 22:03:49,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67297 states, 65032 states have (on average 1.4683847951777587) internal successors, (95492), 65063 states have internal predecessors, (95492), 1893 states have call successors, (1893), 371 states have call predecessors, (1893), 371 states have return successors, (1893), 1862 states have call predecessors, (1893), 1893 states have call successors, (1893) [2023-11-06 22:03:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67297 states to 67297 states and 99278 transitions. [2023-11-06 22:03:49,456 INFO L78 Accepts]: Start accepts. Automaton has 67297 states and 99278 transitions. Word has length 459 [2023-11-06 22:03:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:49,457 INFO L495 AbstractCegarLoop]: Abstraction has 67297 states and 99278 transitions. [2023-11-06 22:03:49,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.4) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63) [2023-11-06 22:03:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 67297 states and 99278 transitions. [2023-11-06 22:03:49,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:03:49,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:49,510 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:49,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:49,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:03:49,719 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:49,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:49,720 INFO L85 PathProgramCache]: Analyzing trace with hash 777191198, now seen corresponding path program 1 times [2023-11-06 22:03:49,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:49,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454969912] [2023-11-06 22:03:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:49,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:49,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:49,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386217195] [2023-11-06 22:03:49,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:49,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:49,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:49,807 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef7fc792-8f27-42fc-a6f1-3eb249a3164d/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:03:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:50,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:03:50,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked. [2023-11-06 22:03:50,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454969912] [2023-11-06 22:03:50,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:50,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386217195] [2023-11-06 22:03:50,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386217195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:50,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:50,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:03:50,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8554503] [2023-11-06 22:03:50,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:50,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:03:50,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:50,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:03:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:03:50,901 INFO L87 Difference]: Start difference. First operand 67297 states and 99278 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (63), 1 states have call predecessors, (63), 1 states have return successors, (63), 1 states have call predecessors, (63), 1 states have call successors, (63)