./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.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_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/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_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/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_470947ef-1828-4498-8b5c-63f9c7324870/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 fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:08:22,287 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:08:22,375 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:08:22,380 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:08:22,381 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:08:22,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:08:22,410 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:08:22,411 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:08:22,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:08:22,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:08:22,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:08:22,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:08:22,415 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:08:22,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:08:22,417 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:08:22,417 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:08:22,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:08:22,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:08:22,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:08:22,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:08:22,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:08:22,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:08:22,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:08:22,423 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:08:22,424 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:08:22,424 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:08:22,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:08:22,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:08:22,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:08:22,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:08:22,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:08:22,428 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:08:22,428 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:08:22,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:08:22,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:08:22,430 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:08:22,430 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:08:22,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:08:22,431 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:08:22,431 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_470947ef-1828-4498-8b5c-63f9c7324870/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd [2023-11-06 22:08:22,767 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:08:22,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:08:22,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:08:22,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:08:22,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:08:22,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-06 22:08:26,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:08:26,434 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:08:26,435 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-06 22:08:26,452 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/data/5985a9ca2/14e13686cc1d4ee9841dfdb1347e8825/FLAGd44758485 [2023-11-06 22:08:26,470 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/data/5985a9ca2/14e13686cc1d4ee9841dfdb1347e8825 [2023-11-06 22:08:26,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:08:26,476 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:08:26,478 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:08:26,478 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:08:26,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:08:26,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:08:26" (1/1) ... [2023-11-06 22:08:26,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610d8ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:26, skipping insertion in model container [2023-11-06 22:08:26,488 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:08:26" (1/1) ... [2023-11-06 22:08:26,543 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:08:26,761 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_470947ef-1828-4498-8b5c-63f9c7324870/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-06 22:08:26,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:08:26,944 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:08:26,960 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_470947ef-1828-4498-8b5c-63f9c7324870/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-06 22:08:27,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:08:27,087 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:08:27,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27 WrapperNode [2023-11-06 22:08:27,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:08:27,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:08:27,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:08:27,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:08:27,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,128 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,212 INFO L138 Inliner]: procedures = 26, calls = 86, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 541 [2023-11-06 22:08:27,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:08:27,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:08:27,224 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:08:27,229 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:08:27,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,247 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,248 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,317 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:08:27,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:08:27,342 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:08:27,342 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:08:27,343 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (1/1) ... [2023-11-06 22:08:27,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:08:27,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:27,396 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:08:27,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:08:27,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:08:27,458 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:08:27,458 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:08:27,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:08:27,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:08:27,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:08:27,602 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:08:27,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:08:28,723 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:08:28,739 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:08:28,740 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:08:28,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:08:28 BoogieIcfgContainer [2023-11-06 22:08:28,744 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:08:28,752 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:08:28,753 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:08:28,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:08:28,759 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:08:26" (1/3) ... [2023-11-06 22:08:28,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ded144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:08:28, skipping insertion in model container [2023-11-06 22:08:28,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:08:27" (2/3) ... [2023-11-06 22:08:28,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ded144d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:08:28, skipping insertion in model container [2023-11-06 22:08:28,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:08:28" (3/3) ... [2023-11-06 22:08:28,766 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-06 22:08:28,787 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:08:28,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:08:28,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:08:28,876 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;@30dcb720, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:08:28,877 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:08:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 138 states have internal predecessors, (215), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:08:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:08:28,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:28,953 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:28,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:28,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:28,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2114910543, now seen corresponding path program 1 times [2023-11-06 22:08:28,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:28,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035514313] [2023-11-06 22:08:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:29,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:29,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035514313] [2023-11-06 22:08:29,560 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:08:29,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876540830] [2023-11-06 22:08:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:29,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:29,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:29,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:29,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:08:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:30,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:08:30,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2023-11-06 22:08:30,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:30,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876540830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:30,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:08:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:08:30,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872565938] [2023-11-06 22:08:30,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:30,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:08:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:30,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:08:30,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:08:30,311 INFO L87 Difference]: Start difference. First operand has 213 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 138 states have internal predecessors, (215), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-06 22:08:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:30,436 INFO L93 Difference]: Finished difference Result 419 states and 789 transitions. [2023-11-06 22:08:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:08:30,439 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) Word has length 459 [2023-11-06 22:08:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:30,460 INFO L225 Difference]: With dead ends: 419 [2023-11-06 22:08:30,460 INFO L226 Difference]: Without dead ends: 209 [2023-11-06 22:08:30,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 458 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 22:08:30,481 INFO L413 NwaCegarLoop]: 353 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, 353 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 22:08:30,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:08:30,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-06 22:08:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-06 22:08:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 134 states have (on average 1.544776119402985) internal successors, (207), 134 states have internal predecessors, (207), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-06 22:08:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 353 transitions. [2023-11-06 22:08:30,599 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 353 transitions. Word has length 459 [2023-11-06 22:08:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:30,600 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 353 transitions. [2023-11-06 22:08:30,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-06 22:08:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 353 transitions. [2023-11-06 22:08:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-06 22:08:30,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:30,615 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:30,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:30,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:30,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:30,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1238988531, now seen corresponding path program 1 times [2023-11-06 22:08:30,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:30,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060814148] [2023-11-06 22:08:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:30,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:31,063 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053220999] [2023-11-06 22:08:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:31,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:31,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:31,074 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:31,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:08:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:31,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:08:31,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:08:32,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060814148] [2023-11-06 22:08:32,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:32,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053220999] [2023-11-06 22:08:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053220999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:32,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:08:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:08:32,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662506005] [2023-11-06 22:08:32,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:32,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:08:32,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:32,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:08:32,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:08:32,700 INFO L87 Difference]: Start difference. First operand 209 states and 353 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:32,838 INFO L93 Difference]: Finished difference Result 621 states and 1053 transitions. [2023-11-06 22:08:32,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:08:32,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 459 [2023-11-06 22:08:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:32,848 INFO L225 Difference]: With dead ends: 621 [2023-11-06 22:08:32,848 INFO L226 Difference]: Without dead ends: 415 [2023-11-06 22:08:32,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 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 22:08:32,851 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 136 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:32,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 743 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:08:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-06 22:08:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2023-11-06 22:08:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 263 states have (on average 1.543726235741445) internal successors, (406), 263 states have internal predecessors, (406), 146 states have call successors, (146), 2 states have call predecessors, (146), 2 states have return successors, (146), 146 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-06 22:08:32,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 698 transitions. [2023-11-06 22:08:32,956 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 698 transitions. Word has length 459 [2023-11-06 22:08:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:32,959 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 698 transitions. [2023-11-06 22:08:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 698 transitions. [2023-11-06 22:08:32,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:08:32,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:32,974 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:32,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:33,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:33,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:33,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1266655132, now seen corresponding path program 1 times [2023-11-06 22:08:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543967304] [2023-11-06 22:08:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:33,292 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:33,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883881620] [2023-11-06 22:08:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:33,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:33,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:33,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:33,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:08:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:33,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:08:33,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:08:34,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:34,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:34,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543967304] [2023-11-06 22:08:34,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:34,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883881620] [2023-11-06 22:08:34,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883881620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:34,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:08:34,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:08:34,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059844216] [2023-11-06 22:08:34,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:08:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:08:34,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:08:34,520 INFO L87 Difference]: Start difference. First operand 412 states and 698 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:35,380 INFO L93 Difference]: Finished difference Result 1461 states and 2484 transitions. [2023-11-06 22:08:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:08:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 460 [2023-11-06 22:08:35,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:35,393 INFO L225 Difference]: With dead ends: 1461 [2023-11-06 22:08:35,394 INFO L226 Difference]: Without dead ends: 1052 [2023-11-06 22:08:35,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:35,398 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 342 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:35,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1212 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:08:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-06 22:08:35,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1043. [2023-11-06 22:08:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 698 states have (on average 1.5759312320916905) internal successors, (1100), 700 states have internal predecessors, (1100), 338 states have call successors, (338), 6 states have call predecessors, (338), 6 states have return successors, (338), 336 states have call predecessors, (338), 338 states have call successors, (338) [2023-11-06 22:08:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1776 transitions. [2023-11-06 22:08:35,605 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1776 transitions. Word has length 460 [2023-11-06 22:08:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:35,607 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1776 transitions. [2023-11-06 22:08:35,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1776 transitions. [2023-11-06 22:08:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-06 22:08:35,614 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:35,614 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:35,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:35,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:35,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:35,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:35,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1846108507, now seen corresponding path program 1 times [2023-11-06 22:08:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:35,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911257946] [2023-11-06 22:08:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:35,972 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:35,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219821163] [2023-11-06 22:08:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:35,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:35,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:35,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:35,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:08:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:36,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:08:36,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:08:37,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:37,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:37,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911257946] [2023-11-06 22:08:37,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:37,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219821163] [2023-11-06 22:08:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219821163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:37,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:08:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:08:37,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018379255] [2023-11-06 22:08:37,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:08:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:37,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:08:37,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:08:37,126 INFO L87 Difference]: Start difference. First operand 1043 states and 1776 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:37,438 INFO L93 Difference]: Finished difference Result 2197 states and 3738 transitions. [2023-11-06 22:08:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:08:37,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 460 [2023-11-06 22:08:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:37,488 INFO L225 Difference]: With dead ends: 2197 [2023-11-06 22:08:37,488 INFO L226 Difference]: Without dead ends: 1157 [2023-11-06 22:08:37,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 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 22:08:37,493 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 391 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:37,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1230 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:08:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-11-06 22:08:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1149. [2023-11-06 22:08:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 780 states have (on average 1.5807692307692307) internal successors, (1233), 783 states have internal predecessors, (1233), 361 states have call successors, (361), 7 states have call predecessors, (361), 7 states have return successors, (361), 358 states have call predecessors, (361), 361 states have call successors, (361) [2023-11-06 22:08:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1955 transitions. [2023-11-06 22:08:37,677 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1955 transitions. Word has length 460 [2023-11-06 22:08:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:37,679 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1955 transitions. [2023-11-06 22:08:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1955 transitions. [2023-11-06 22:08:37,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:08:37,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:37,686 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:37,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-06 22:08:37,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-06 22:08:37,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:37,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash -983725337, now seen corresponding path program 1 times [2023-11-06 22:08:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:37,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045070452] [2023-11-06 22:08:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:37,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:37,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040979851] [2023-11-06 22:08:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:37,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:37,981 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:08:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:38,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:08:38,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:08:38,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045070452] [2023-11-06 22:08:38,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:38,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040979851] [2023-11-06 22:08:38,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040979851] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:38,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:08:38,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:08:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387895655] [2023-11-06 22:08:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:38,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:08:38,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:38,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:08:38,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:08:38,453 INFO L87 Difference]: Start difference. First operand 1149 states and 1955 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:38,908 INFO L93 Difference]: Finished difference Result 4883 states and 8267 transitions. [2023-11-06 22:08:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:08:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 461 [2023-11-06 22:08:38,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:38,942 INFO L225 Difference]: With dead ends: 4883 [2023-11-06 22:08:38,942 INFO L226 Difference]: Without dead ends: 3737 [2023-11-06 22:08:38,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 459 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 22:08:38,950 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 714 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:38,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1290 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:08:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2023-11-06 22:08:39,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3723. [2023-11-06 22:08:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 2586 states have (on average 1.5699922660479506) internal successors, (4060), 2606 states have internal predecessors, (4060), 1108 states have call successors, (1108), 28 states have call predecessors, (1108), 28 states have return successors, (1108), 1088 states have call predecessors, (1108), 1108 states have call successors, (1108) [2023-11-06 22:08:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6276 transitions. [2023-11-06 22:08:39,553 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6276 transitions. Word has length 461 [2023-11-06 22:08:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:39,555 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 6276 transitions. [2023-11-06 22:08:39,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6276 transitions. [2023-11-06 22:08:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-06 22:08:39,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:39,564 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:39,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:39,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:39,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:39,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1622298217, now seen corresponding path program 1 times [2023-11-06 22:08:39,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878392543] [2023-11-06 22:08:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:39,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:39,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456391691] [2023-11-06 22:08:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:39,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:39,841 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:39,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:08:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:40,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:08:40,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5218 proven. 123 refuted. 0 times theorem prover too weak. 5171 trivial. 0 not checked. [2023-11-06 22:08:40,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 93 proven. 123 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-06 22:08:41,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878392543] [2023-11-06 22:08:41,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456391691] [2023-11-06 22:08:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456391691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:41,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:41,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:08:41,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023511290] [2023-11-06 22:08:41,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:41,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:08:41,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:08:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:08:41,282 INFO L87 Difference]: Start difference. First operand 3723 states and 6276 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:08:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:41,987 INFO L93 Difference]: Finished difference Result 6059 states and 10196 transitions. [2023-11-06 22:08:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:08:41,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 461 [2023-11-06 22:08:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:42,014 INFO L225 Difference]: With dead ends: 6059 [2023-11-06 22:08:42,014 INFO L226 Difference]: Without dead ends: 2339 [2023-11-06 22:08:42,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 914 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:08:42,033 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 358 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 656 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:08:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-11-06 22:08:42,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2311. [2023-11-06 22:08:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1566 states have (on average 1.5472541507024267) internal successors, (2423), 1572 states have internal predecessors, (2423), 722 states have call successors, (722), 22 states have call predecessors, (722), 22 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-06 22:08:42,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3867 transitions. [2023-11-06 22:08:42,490 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3867 transitions. Word has length 461 [2023-11-06 22:08:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:42,491 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3867 transitions. [2023-11-06 22:08:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-06 22:08:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3867 transitions. [2023-11-06 22:08:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-06 22:08:42,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:42,500 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:42,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:42,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:42,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:42,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:42,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1085110978, now seen corresponding path program 1 times [2023-11-06 22:08:42,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:42,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667374577] [2023-11-06 22:08:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:42,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648219937] [2023-11-06 22:08:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:42,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:42,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:08:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:43,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:08:43,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 2676 proven. 30 refuted. 0 times theorem prover too weak. 7806 trivial. 0 not checked. [2023-11-06 22:08:43,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 186 proven. 30 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-06 22:08:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:43,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667374577] [2023-11-06 22:08:43,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:43,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648219937] [2023-11-06 22:08:43,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648219937] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:43,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:43,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:08:43,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952947255] [2023-11-06 22:08:43,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:43,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:08:43,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:08:43,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:08:43,813 INFO L87 Difference]: Start difference. First operand 2311 states and 3867 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-06 22:08:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:44,543 INFO L93 Difference]: Finished difference Result 4695 states and 7799 transitions. [2023-11-06 22:08:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:08:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 463 [2023-11-06 22:08:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:44,565 INFO L225 Difference]: With dead ends: 4695 [2023-11-06 22:08:44,565 INFO L226 Difference]: Without dead ends: 2387 [2023-11-06 22:08:44,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:08:44,577 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 397 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:44,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 652 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:08:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2023-11-06 22:08:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2343. [2023-11-06 22:08:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 1590 states have (on average 1.530188679245283) internal successors, (2433), 1596 states have internal predecessors, (2433), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-06 22:08:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3877 transitions. [2023-11-06 22:08:44,959 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3877 transitions. Word has length 463 [2023-11-06 22:08:44,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:44,960 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 3877 transitions. [2023-11-06 22:08:44,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-06 22:08:44,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3877 transitions. [2023-11-06 22:08:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-06 22:08:44,967 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:44,968 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:44,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:45,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:45,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:45,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:45,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1286628284, now seen corresponding path program 1 times [2023-11-06 22:08:45,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:45,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222717925] [2023-11-06 22:08:45,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:45,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:45,251 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:45,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552966545] [2023-11-06 22:08:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:45,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:45,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:45,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:45,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:08:45,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:45,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:08:45,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 6958 proven. 63 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2023-11-06 22:08:46,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:08:46,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222717925] [2023-11-06 22:08:46,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:46,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552966545] [2023-11-06 22:08:46,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552966545] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:46,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:08:46,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-06 22:08:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998064739] [2023-11-06 22:08:46,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:46,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:08:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:08:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:08:46,857 INFO L87 Difference]: Start difference. First operand 2343 states and 3877 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:47,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:47,081 INFO L93 Difference]: Finished difference Result 4697 states and 7779 transitions. [2023-11-06 22:08:47,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:08:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 463 [2023-11-06 22:08:47,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:47,102 INFO L225 Difference]: With dead ends: 4697 [2023-11-06 22:08:47,102 INFO L226 Difference]: Without dead ends: 2357 [2023-11-06 22:08:47,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:08:47,112 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:47,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 665 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:08:47,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2023-11-06 22:08:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2357. [2023-11-06 22:08:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 1604 states have (on average 1.5255610972568578) internal successors, (2447), 1610 states have internal predecessors, (2447), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-06 22:08:47,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3891 transitions. [2023-11-06 22:08:47,475 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3891 transitions. Word has length 463 [2023-11-06 22:08:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:47,476 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 3891 transitions. [2023-11-06 22:08:47,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:08:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3891 transitions. [2023-11-06 22:08:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:08:47,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:47,485 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:47,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:47,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:47,693 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:47,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:47,693 INFO L85 PathProgramCache]: Analyzing trace with hash 540101299, now seen corresponding path program 1 times [2023-11-06 22:08:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505286542] [2023-11-06 22:08:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:47,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718282537] [2023-11-06 22:08:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:47,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:47,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:47,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:08:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:48,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:08:48,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 7927 proven. 63 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2023-11-06 22:08:49,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 153 proven. 63 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-06 22:08:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505286542] [2023-11-06 22:08:50,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:50,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718282537] [2023-11-06 22:08:50,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718282537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:50,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:50,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-06 22:08:50,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235873114] [2023-11-06 22:08:50,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:50,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:08:50,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:50,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:08:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:08:50,221 INFO L87 Difference]: Start difference. First operand 2357 states and 3891 transitions. Second operand has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-06 22:08:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:51,291 INFO L93 Difference]: Finished difference Result 4801 states and 7875 transitions. [2023-11-06 22:08:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:08:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) Word has length 464 [2023-11-06 22:08:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:51,314 INFO L225 Difference]: With dead ends: 4801 [2023-11-06 22:08:51,314 INFO L226 Difference]: Without dead ends: 2447 [2023-11-06 22:08:51,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:08:51,328 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 393 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:51,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 748 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:08:51,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-06 22:08:51,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2389. [2023-11-06 22:08:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 1628 states have (on average 1.5178132678132679) internal successors, (2471), 1634 states have internal predecessors, (2471), 722 states have call successors, (722), 38 states have call predecessors, (722), 38 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-06 22:08:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3915 transitions. [2023-11-06 22:08:51,682 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3915 transitions. Word has length 464 [2023-11-06 22:08:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:51,683 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 3915 transitions. [2023-11-06 22:08:51,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-06 22:08:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3915 transitions. [2023-11-06 22:08:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:08:51,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:51,690 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:08:51,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:51,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:51,898 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:51,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:51,899 INFO L85 PathProgramCache]: Analyzing trace with hash -831705999, now seen corresponding path program 1 times [2023-11-06 22:08:51,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:51,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746986132] [2023-11-06 22:08:51,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:51,964 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:08:51,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276207686] [2023-11-06 22:08:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:51,966 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:51,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:08:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:52,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:08:52,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 8328 proven. 99 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2023-11-06 22:08:54,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 327 proven. 102 refuted. 0 times theorem prover too weak. 10083 trivial. 0 not checked. [2023-11-06 22:08:55,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746986132] [2023-11-06 22:08:55,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:08:55,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276207686] [2023-11-06 22:08:55,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276207686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:08:55,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:55,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-11-06 22:08:55,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920490787] [2023-11-06 22:08:55,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:08:55,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-06 22:08:55,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-06 22:08:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:08:55,223 INFO L87 Difference]: Start difference. First operand 2389 states and 3915 transitions. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-06 22:08:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:59,220 INFO L93 Difference]: Finished difference Result 11323 states and 18445 transitions. [2023-11-06 22:08:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-06 22:08:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) Word has length 464 [2023-11-06 22:08:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:59,306 INFO L225 Difference]: With dead ends: 11323 [2023-11-06 22:08:59,307 INFO L226 Difference]: Without dead ends: 8937 [2023-11-06 22:08:59,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=830, Invalid=1720, Unknown=0, NotChecked=0, Total=2550 [2023-11-06 22:08:59,325 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 2731 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 2696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:59,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 1804 Invalid, 2696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:08:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2023-11-06 22:08:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 3939. [2023-11-06 22:09:00,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 2932 states have (on average 1.5661664392905865) internal successors, (4592), 2952 states have internal predecessors, (4592), 946 states have call successors, (946), 60 states have call predecessors, (946), 60 states have return successors, (946), 926 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-06 22:09:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 6484 transitions. [2023-11-06 22:09:00,017 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 6484 transitions. Word has length 464 [2023-11-06 22:09:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:00,019 INFO L495 AbstractCegarLoop]: Abstraction has 3939 states and 6484 transitions. [2023-11-06 22:09:00,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-06 22:09:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 6484 transitions. [2023-11-06 22:09:00,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:09:00,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:00,028 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:00,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:00,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:09:00,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:00,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash -904092557, now seen corresponding path program 1 times [2023-11-06 22:09:00,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:00,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654861450] [2023-11-06 22:09:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:00,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:00,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672247449] [2023-11-06 22:09:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:00,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:00,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:00,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:00,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:09:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:00,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:09:00,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 4822 proven. 150 refuted. 0 times theorem prover too weak. 5540 trivial. 0 not checked. [2023-11-06 22:09:02,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:09:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:03,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654861450] [2023-11-06 22:09:03,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672247449] [2023-11-06 22:09:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672247449] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:09:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-06 22:09:03,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109921903] [2023-11-06 22:09:03,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:09:03,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:09:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:09:03,176 INFO L87 Difference]: Start difference. First operand 3939 states and 6484 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-06 22:09:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:04,518 INFO L93 Difference]: Finished difference Result 10923 states and 18076 transitions. [2023-11-06 22:09:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 464 [2023-11-06 22:09:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:04,546 INFO L225 Difference]: With dead ends: 10923 [2023-11-06 22:09:04,546 INFO L226 Difference]: Without dead ends: 6987 [2023-11-06 22:09:04,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:09:04,561 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 613 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:04,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 561 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:09:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2023-11-06 22:09:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6971. [2023-11-06 22:09:05,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6971 states, 5460 states have (on average 1.594871794871795) internal successors, (8708), 5508 states have internal predecessors, (8708), 1422 states have call successors, (1422), 88 states have call predecessors, (1422), 88 states have return successors, (1422), 1374 states have call predecessors, (1422), 1422 states have call successors, (1422) [2023-11-06 22:09:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 11552 transitions. [2023-11-06 22:09:05,688 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 11552 transitions. Word has length 464 [2023-11-06 22:09:05,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:05,690 INFO L495 AbstractCegarLoop]: Abstraction has 6971 states and 11552 transitions. [2023-11-06 22:09:05,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-06 22:09:05,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 11552 transitions. [2023-11-06 22:09:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:09:05,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:05,703 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:05,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:09:05,912 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:05,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash -842052943, now seen corresponding path program 1 times [2023-11-06 22:09:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:05,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405963395] [2023-11-06 22:09:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:06,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920732664] [2023-11-06 22:09:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:06,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:06,012 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:06,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:09:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:06,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:09:06,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:09:07,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:09:07,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:07,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405963395] [2023-11-06 22:09:07,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:07,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920732664] [2023-11-06 22:09:07,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920732664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:07,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:07,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116188581] [2023-11-06 22:09:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:07,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:07,101 INFO L87 Difference]: Start difference. First operand 6971 states and 11552 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:09:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:08,634 INFO L93 Difference]: Finished difference Result 18827 states and 31182 transitions. [2023-11-06 22:09:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:09:08,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 464 [2023-11-06 22:09:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:08,680 INFO L225 Difference]: With dead ends: 18827 [2023-11-06 22:09:08,680 INFO L226 Difference]: Without dead ends: 11859 [2023-11-06 22:09:08,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:08,704 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 490 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:08,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 845 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:09:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11859 states. [2023-11-06 22:09:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11859 to 10209. [2023-11-06 22:09:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 7636 states have (on average 1.5447878470403353) internal successors, (11796), 7712 states have internal predecessors, (11796), 2396 states have call successors, (2396), 176 states have call predecessors, (2396), 176 states have return successors, (2396), 2320 states have call predecessors, (2396), 2396 states have call successors, (2396) [2023-11-06 22:09:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 16588 transitions. [2023-11-06 22:09:10,555 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 16588 transitions. Word has length 464 [2023-11-06 22:09:10,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:10,557 INFO L495 AbstractCegarLoop]: Abstraction has 10209 states and 16588 transitions. [2023-11-06 22:09:10,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-06 22:09:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 16588 transitions. [2023-11-06 22:09:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:09:10,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:10,573 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:10,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:10,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:09:10,782 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:10,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash 676490212, now seen corresponding path program 1 times [2023-11-06 22:09:10,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:10,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041624600] [2023-11-06 22:09:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:10,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:10,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779145131] [2023-11-06 22:09:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:10,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:10,871 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:11,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:09:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:11,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:09:11,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 3960 proven. 0 refuted. 0 times theorem prover too weak. 6552 trivial. 0 not checked. [2023-11-06 22:09:12,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:09:12,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041624600] [2023-11-06 22:09:12,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:12,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779145131] [2023-11-06 22:09:12,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779145131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:12,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:12,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 22:09:12,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298916277] [2023-11-06 22:09:12,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:09:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:12,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:09:12,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:09:12,230 INFO L87 Difference]: Start difference. First operand 10209 states and 16588 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-06 22:09:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:16,660 INFO L93 Difference]: Finished difference Result 36791 states and 60175 transitions. [2023-11-06 22:09:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:09:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) Word has length 464 [2023-11-06 22:09:16,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:16,751 INFO L225 Difference]: With dead ends: 36791 [2023-11-06 22:09:16,751 INFO L226 Difference]: Without dead ends: 26585 [2023-11-06 22:09:16,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:09:16,777 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 872 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:16,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1736 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:09:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26585 states. [2023-11-06 22:09:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26585 to 10883. [2023-11-06 22:09:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10883 states, 8310 states have (on average 1.569193742478941) internal successors, (13040), 8386 states have internal predecessors, (13040), 2396 states have call successors, (2396), 176 states have call predecessors, (2396), 176 states have return successors, (2396), 2320 states have call predecessors, (2396), 2396 states have call successors, (2396) [2023-11-06 22:09:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 17832 transitions. [2023-11-06 22:09:19,476 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 17832 transitions. Word has length 464 [2023-11-06 22:09:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:19,477 INFO L495 AbstractCegarLoop]: Abstraction has 10883 states and 17832 transitions. [2023-11-06 22:09:19,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-06 22:09:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 17832 transitions. [2023-11-06 22:09:19,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-06 22:09:19,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:19,497 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:19,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:19,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:09:19,707 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:19,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1475913069, now seen corresponding path program 1 times [2023-11-06 22:09:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:19,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968493230] [2023-11-06 22:09:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:19,791 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89702294] [2023-11-06 22:09:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:19,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:19,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:19,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:19,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:09:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:20,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:09:20,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 6912 proven. 93 refuted. 0 times theorem prover too weak. 3507 trivial. 0 not checked. [2023-11-06 22:09:22,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-06 22:09:24,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968493230] [2023-11-06 22:09:24,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:09:24,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89702294] [2023-11-06 22:09:24,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89702294] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:24,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:09:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2023-11-06 22:09:24,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797898733] [2023-11-06 22:09:24,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:09:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:09:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-11-06 22:09:24,133 INFO L87 Difference]: Start difference. First operand 10883 states and 17832 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-06 22:09:30,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:30,790 INFO L93 Difference]: Finished difference Result 41090 states and 67549 transitions. [2023-11-06 22:09:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:09:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 464 [2023-11-06 22:09:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:30,920 INFO L225 Difference]: With dead ends: 41090 [2023-11-06 22:09:30,920 INFO L226 Difference]: Without dead ends: 30210 [2023-11-06 22:09:30,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 917 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:09:30,947 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 1616 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:30,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 1435 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:09:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30210 states. [2023-11-06 22:09:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30210 to 16043. [2023-11-06 22:09:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16043 states, 12187 states have (on average 1.5564125707721344) internal successors, (18968), 12306 states have internal predecessors, (18968), 3576 states have call successors, (3576), 279 states have call predecessors, (3576), 279 states have return successors, (3576), 3457 states have call predecessors, (3576), 3576 states have call successors, (3576) [2023-11-06 22:09:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16043 states to 16043 states and 26120 transitions. [2023-11-06 22:09:35,340 INFO L78 Accepts]: Start accepts. Automaton has 16043 states and 26120 transitions. Word has length 464 [2023-11-06 22:09:35,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:35,341 INFO L495 AbstractCegarLoop]: Abstraction has 16043 states and 26120 transitions. [2023-11-06 22:09:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-06 22:09:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16043 states and 26120 transitions. [2023-11-06 22:09:35,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2023-11-06 22:09:35,364 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:35,364 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:09:35,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:35,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:09:35,573 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:35,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:35,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1185214317, now seen corresponding path program 1 times [2023-11-06 22:09:35,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:35,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612927127] [2023-11-06 22:09:35,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:35,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:35,662 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:09:35,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1726094941] [2023-11-06 22:09:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:35,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:35,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:35,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470947ef-1828-4498-8b5c-63f9c7324870/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:09:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:36,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-06 22:09:36,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 1799 proven. 594 refuted. 0 times theorem prover too weak. 8119 trivial. 0 not checked. [2023-11-06 22:09:38,916 INFO L327 TraceCheckSpWp]: Computing backward predicates...