./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.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_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/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_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/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_3849053d-85b2-4eb5-a16a-20630af0f59f/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 3fc2dee412d1614ffe2e48e99f34626a98e2bc7bb385efe0786b8cd06ee2804e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:33:55,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:33:55,710 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:33:55,716 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:33:55,717 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:33:55,771 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:33:55,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:33:55,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:33:55,778 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:33:55,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:33:55,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:33:55,785 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:33:55,785 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:33:55,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:33:55,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:33:55,788 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:33:55,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:33:55,789 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:33:55,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:33:55,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:33:55,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:33:55,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:33:55,792 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:33:55,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:33:55,815 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:33:55,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:33:55,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:33:55,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:33:55,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:33:55,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:33:55,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:33:55,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:33:55,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:33:55,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:33:55,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:33:55,820 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:33:55,820 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:33:55,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:33:55,821 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:33:55,821 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_3849053d-85b2-4eb5-a16a-20630af0f59f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fc2dee412d1614ffe2e48e99f34626a98e2bc7bb385efe0786b8cd06ee2804e [2023-11-06 22:33:56,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:33:56,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:33:56,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:33:56,191 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:33:56,191 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:33:56,193 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.i [2023-11-06 22:33:59,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:33:59,743 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:33:59,744 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.i [2023-11-06 22:33:59,778 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/data/1c46b4636/fd7d68ea9fd4422c95eddd98adf405dc/FLAGc93b6ad7e [2023-11-06 22:33:59,795 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/data/1c46b4636/fd7d68ea9fd4422c95eddd98adf405dc [2023-11-06 22:33:59,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:33:59,805 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:33:59,811 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:33:59,812 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:33:59,817 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:33:59,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:59" (1/1) ... [2023-11-06 22:33:59,819 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d628b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:33:59, skipping insertion in model container [2023-11-06 22:33:59,819 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:33:59" (1/1) ... [2023-11-06 22:33:59,890 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:34:00,074 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_3849053d-85b2-4eb5-a16a-20630af0f59f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.i[916,929] [2023-11-06 22:34:00,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:34:00,329 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:34:00,341 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_3849053d-85b2-4eb5-a16a-20630af0f59f/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-99.i[916,929] [2023-11-06 22:34:00,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:34:00,463 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:34:00,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00 WrapperNode [2023-11-06 22:34:00,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:34:00,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:34:00,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:34:00,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:34:00,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,507 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,632 INFO L138 Inliner]: procedures = 26, calls = 119, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 940 [2023-11-06 22:34:00,633 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:34:00,633 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:34:00,634 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:34:00,634 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:34:00,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,762 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:34:00,763 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:34:00,763 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:34:00,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:34:00,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (1/1) ... [2023-11-06 22:34:00,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:34:00,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:00,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:34:00,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:34:00,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:34:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:34:00,843 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:34:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:34:00,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:34:00,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:34:01,052 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:34:01,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:34:02,528 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:34:02,541 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:34:02,542 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:34:02,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:02 BoogieIcfgContainer [2023-11-06 22:34:02,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:34:02,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:34:02,547 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:34:02,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:34:02,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:33:59" (1/3) ... [2023-11-06 22:34:02,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffbf4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:02, skipping insertion in model container [2023-11-06 22:34:02,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:00" (2/3) ... [2023-11-06 22:34:02,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffbf4b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:02, skipping insertion in model container [2023-11-06 22:34:02,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:02" (3/3) ... [2023-11-06 22:34:02,554 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-99.i [2023-11-06 22:34:02,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:34:02,572 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:34:02,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:34:02,641 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;@55564477, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:34:02,642 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:34:02,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 350 states, 241 states have (on average 1.6556016597510372) internal successors, (399), 242 states have internal predecessors, (399), 106 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-06 22:34:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:02,716 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:02,717 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:02,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:02,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:02,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1203094626, now seen corresponding path program 1 times [2023-11-06 22:34:02,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:02,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584088630] [2023-11-06 22:34:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:03,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584088630] [2023-11-06 22:34:03,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:34:03,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730138155] [2023-11-06 22:34:03,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:03,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:03,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:03,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:03,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:34:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:03,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:34:03,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 22050 trivial. 0 not checked. [2023-11-06 22:34:04,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730138155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:04,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:04,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:04,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676155497] [2023-11-06 22:34:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:34:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:04,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:34:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:34:04,135 INFO L87 Difference]: Start difference. First operand has 350 states, 241 states have (on average 1.6556016597510372) internal successors, (399), 242 states have internal predecessors, (399), 106 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 2 states have call successors, (106), 2 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-06 22:34:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:04,222 INFO L93 Difference]: Finished difference Result 693 states and 1322 transitions. [2023-11-06 22:34:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:34:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 2 states have call successors, (106), 2 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 2 states have call successors, (106) Word has length 687 [2023-11-06 22:34:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:04,239 INFO L225 Difference]: With dead ends: 693 [2023-11-06 22:34:04,239 INFO L226 Difference]: Without dead ends: 346 [2023-11-06 22:34:04,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 686 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 22:34:04,252 INFO L413 NwaCegarLoop]: 603 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, 603 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 22:34:04,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:34:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-11-06 22:34:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-11-06 22:34:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 238 states have (on average 1.6428571428571428) internal successors, (391), 238 states have internal predecessors, (391), 106 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-06 22:34:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 603 transitions. [2023-11-06 22:34:04,430 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 603 transitions. Word has length 687 [2023-11-06 22:34:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:04,431 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 603 transitions. [2023-11-06 22:34:04,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 2 states have call successors, (106), 2 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-06 22:34:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 603 transitions. [2023-11-06 22:34:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:04,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:04,464 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:04,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:04,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 22:34:04,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:04,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:04,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1657166754, now seen corresponding path program 1 times [2023-11-06 22:34:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310966907] [2023-11-06 22:34:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:04,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:04,860 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:04,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738308824] [2023-11-06 22:34:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:04,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:04,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:04,863 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:04,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:34:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:05,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:34:05,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:06,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:06,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:06,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310966907] [2023-11-06 22:34:06,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738308824] [2023-11-06 22:34:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738308824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:06,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:06,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662466083] [2023-11-06 22:34:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:06,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:34:06,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:34:06,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:34:06,519 INFO L87 Difference]: Start difference. First operand 346 states and 603 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:06,646 INFO L93 Difference]: Finished difference Result 1032 states and 1803 transitions. [2023-11-06 22:34:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:34:06,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:06,663 INFO L225 Difference]: With dead ends: 1032 [2023-11-06 22:34:06,663 INFO L226 Difference]: Without dead ends: 689 [2023-11-06 22:34:06,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 22:34:06,669 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 303 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:06,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1189 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:34:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-06 22:34:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 687. [2023-11-06 22:34:06,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 472 states have (on average 1.646186440677966) internal successors, (777), 472 states have internal predecessors, (777), 212 states have call successors, (212), 2 states have call predecessors, (212), 2 states have return successors, (212), 212 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-06 22:34:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1201 transitions. [2023-11-06 22:34:06,830 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1201 transitions. Word has length 687 [2023-11-06 22:34:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:06,833 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 1201 transitions. [2023-11-06 22:34:06,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1201 transitions. [2023-11-06 22:34:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:06,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:06,844 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:06,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:07,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:07,054 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:07,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash -769943908, now seen corresponding path program 1 times [2023-11-06 22:34:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:07,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643154329] [2023-11-06 22:34:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:07,226 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:07,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681907086] [2023-11-06 22:34:07,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:07,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:07,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:07,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:34:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:07,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:34:07,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:08,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:08,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643154329] [2023-11-06 22:34:08,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681907086] [2023-11-06 22:34:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681907086] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:08,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:08,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:34:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835434276] [2023-11-06 22:34:08,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:08,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:34:08,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:08,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:34:08,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:34:08,938 INFO L87 Difference]: Start difference. First operand 687 states and 1201 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:10,322 INFO L93 Difference]: Finished difference Result 1862 states and 3262 transitions. [2023-11-06 22:34:10,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:34:10,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:10,337 INFO L225 Difference]: With dead ends: 1862 [2023-11-06 22:34:10,338 INFO L226 Difference]: Without dead ends: 1178 [2023-11-06 22:34:10,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:34:10,344 INFO L413 NwaCegarLoop]: 898 mSDtfsCounter, 1698 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:10,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 2995 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:34:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2023-11-06 22:34:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1166. [2023-11-06 22:34:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 852 states have (on average 1.6830985915492958) internal successors, (1434), 854 states have internal predecessors, (1434), 308 states have call successors, (308), 5 states have call predecessors, (308), 5 states have return successors, (308), 306 states have call predecessors, (308), 308 states have call successors, (308) [2023-11-06 22:34:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2050 transitions. [2023-11-06 22:34:10,584 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2050 transitions. Word has length 687 [2023-11-06 22:34:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:10,586 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 2050 transitions. [2023-11-06 22:34:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 5 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2050 transitions. [2023-11-06 22:34:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:10,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:10,601 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:10,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:10,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:10,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:10,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash 796814042, now seen corresponding path program 1 times [2023-11-06 22:34:10,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:10,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973203661] [2023-11-06 22:34:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:10,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:10,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:10,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371570069] [2023-11-06 22:34:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:10,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:10,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:34:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:11,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:34:11,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:11,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:11,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973203661] [2023-11-06 22:34:11,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371570069] [2023-11-06 22:34:11,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371570069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:11,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:34:11,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360156395] [2023-11-06 22:34:11,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:11,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:34:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:11,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:34:11,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:34:11,523 INFO L87 Difference]: Start difference. First operand 1166 states and 2050 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:11,655 INFO L93 Difference]: Finished difference Result 3229 states and 5704 transitions. [2023-11-06 22:34:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:34:11,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:11,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:11,676 INFO L225 Difference]: With dead ends: 3229 [2023-11-06 22:34:11,676 INFO L226 Difference]: Without dead ends: 2066 [2023-11-06 22:34:11,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 22:34:11,687 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 404 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:11,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 1295 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:34:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2023-11-06 22:34:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 2061. [2023-11-06 22:34:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1582 states have (on average 1.7073324905183311) internal successors, (2701), 1588 states have internal predecessors, (2701), 468 states have call successors, (468), 10 states have call predecessors, (468), 10 states have return successors, (468), 462 states have call predecessors, (468), 468 states have call successors, (468) [2023-11-06 22:34:11,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3637 transitions. [2023-11-06 22:34:11,909 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3637 transitions. Word has length 687 [2023-11-06 22:34:11,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:11,911 INFO L495 AbstractCegarLoop]: Abstraction has 2061 states and 3637 transitions. [2023-11-06 22:34:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:11,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3637 transitions. [2023-11-06 22:34:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:11,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:11,922 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:11,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:12,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:12,132 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:12,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:12,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1645634020, now seen corresponding path program 1 times [2023-11-06 22:34:12,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:12,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953032186] [2023-11-06 22:34:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:12,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:12,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:12,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570104044] [2023-11-06 22:34:12,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:12,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:12,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:12,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:12,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:34:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:12,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:34:12,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:13,844 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:13,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953032186] [2023-11-06 22:34:13,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570104044] [2023-11-06 22:34:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570104044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:13,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:13,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:34:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692289910] [2023-11-06 22:34:13,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:13,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:34:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:34:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:34:13,849 INFO L87 Difference]: Start difference. First operand 2061 states and 3637 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:14,063 INFO L93 Difference]: Finished difference Result 5414 states and 9523 transitions. [2023-11-06 22:34:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:34:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:14,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:14,091 INFO L225 Difference]: With dead ends: 5414 [2023-11-06 22:34:14,091 INFO L226 Difference]: Without dead ends: 3356 [2023-11-06 22:34:14,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 22:34:14,099 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 295 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:14,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1187 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:34:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2023-11-06 22:34:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 3354. [2023-11-06 22:34:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3354 states, 2516 states have (on average 1.6875993640699523) internal successors, (4246), 2525 states have internal predecessors, (4246), 819 states have call successors, (819), 18 states have call predecessors, (819), 18 states have return successors, (819), 810 states have call predecessors, (819), 819 states have call successors, (819) [2023-11-06 22:34:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3354 states to 3354 states and 5884 transitions. [2023-11-06 22:34:14,444 INFO L78 Accepts]: Start accepts. Automaton has 3354 states and 5884 transitions. Word has length 687 [2023-11-06 22:34:14,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:14,445 INFO L495 AbstractCegarLoop]: Abstraction has 3354 states and 5884 transitions. [2023-11-06 22:34:14,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3354 states and 5884 transitions. [2023-11-06 22:34:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:14,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:14,458 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:14,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:14,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:14,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:14,668 INFO L85 PathProgramCache]: Analyzing trace with hash -2138260194, now seen corresponding path program 1 times [2023-11-06 22:34:14,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:14,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090497708] [2023-11-06 22:34:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:14,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:14,815 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:14,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710927997] [2023-11-06 22:34:14,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:14,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:14,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:14,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:34:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:15,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:34:15,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:15,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:15,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:15,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090497708] [2023-11-06 22:34:15,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:15,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710927997] [2023-11-06 22:34:15,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710927997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:15,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:15,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:34:15,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569813144] [2023-11-06 22:34:15,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:34:15,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:34:15,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:34:15,452 INFO L87 Difference]: Start difference. First operand 3354 states and 5884 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:15,724 INFO L93 Difference]: Finished difference Result 8862 states and 15473 transitions. [2023-11-06 22:34:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:34:15,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:15,835 INFO L225 Difference]: With dead ends: 8862 [2023-11-06 22:34:15,835 INFO L226 Difference]: Without dead ends: 5578 [2023-11-06 22:34:15,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 685 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 22:34:15,847 INFO L413 NwaCegarLoop]: 802 mSDtfsCounter, 364 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:15,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1392 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:34:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2023-11-06 22:34:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 5572. [2023-11-06 22:34:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5572 states, 4060 states have (on average 1.6559113300492612) internal successors, (6723), 4081 states have internal predecessors, (6723), 1475 states have call successors, (1475), 36 states have call predecessors, (1475), 36 states have return successors, (1475), 1454 states have call predecessors, (1475), 1475 states have call successors, (1475) [2023-11-06 22:34:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5572 states to 5572 states and 9673 transitions. [2023-11-06 22:34:16,529 INFO L78 Accepts]: Start accepts. Automaton has 5572 states and 9673 transitions. Word has length 687 [2023-11-06 22:34:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:16,531 INFO L495 AbstractCegarLoop]: Abstraction has 5572 states and 9673 transitions. [2023-11-06 22:34:16,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5572 states and 9673 transitions. [2023-11-06 22:34:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2023-11-06 22:34:16,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:16,546 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:16,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:16,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 22:34:16,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:16,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:16,755 INFO L85 PathProgramCache]: Analyzing trace with hash 107319260, now seen corresponding path program 1 times [2023-11-06 22:34:16,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:16,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935411408] [2023-11-06 22:34:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:16,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:16,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:16,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748144599] [2023-11-06 22:34:16,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:16,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:16,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:16,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:34:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:17,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:34:17,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:17,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935411408] [2023-11-06 22:34:17,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748144599] [2023-11-06 22:34:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748144599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:34:17,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10528439] [2023-11-06 22:34:17,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:17,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:34:17,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:17,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:34:17,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:34:17,650 INFO L87 Difference]: Start difference. First operand 5572 states and 9673 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:18,830 INFO L93 Difference]: Finished difference Result 20010 states and 34907 transitions. [2023-11-06 22:34:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:34:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 687 [2023-11-06 22:34:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:18,930 INFO L225 Difference]: With dead ends: 20010 [2023-11-06 22:34:18,930 INFO L226 Difference]: Without dead ends: 14508 [2023-11-06 22:34:18,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 684 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 22:34:18,954 INFO L413 NwaCegarLoop]: 681 mSDtfsCounter, 1015 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:18,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1568 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:34:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14508 states. [2023-11-06 22:34:20,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14508 to 10098. [2023-11-06 22:34:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10098 states, 7704 states have (on average 1.6830218068535825) internal successors, (12966), 7749 states have internal predecessors, (12966), 2327 states have call successors, (2327), 66 states have call predecessors, (2327), 66 states have return successors, (2327), 2282 states have call predecessors, (2327), 2327 states have call successors, (2327) [2023-11-06 22:34:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10098 states to 10098 states and 17620 transitions. [2023-11-06 22:34:20,147 INFO L78 Accepts]: Start accepts. Automaton has 10098 states and 17620 transitions. Word has length 687 [2023-11-06 22:34:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:20,149 INFO L495 AbstractCegarLoop]: Abstraction has 10098 states and 17620 transitions. [2023-11-06 22:34:20,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 10098 states and 17620 transitions. [2023-11-06 22:34:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2023-11-06 22:34:20,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:20,169 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:20,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 22:34:20,379 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:20,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1789655032, now seen corresponding path program 1 times [2023-11-06 22:34:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:20,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642398410] [2023-11-06 22:34:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:20,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:20,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671134255] [2023-11-06 22:34:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:20,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:20,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:34:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:21,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1637 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:21,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 11079 proven. 138 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-11-06 22:34:21,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 177 proven. 138 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:22,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:22,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642398410] [2023-11-06 22:34:22,219 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:22,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671134255] [2023-11-06 22:34:22,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671134255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:22,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:22,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:34:22,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836809711] [2023-11-06 22:34:22,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:22,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:34:22,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:34:22,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:34:22,225 INFO L87 Difference]: Start difference. First operand 10098 states and 17620 transitions. Second operand has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) [2023-11-06 22:34:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:24,024 INFO L93 Difference]: Finished difference Result 20294 states and 35283 transitions. [2023-11-06 22:34:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:34:24,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) Word has length 688 [2023-11-06 22:34:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:24,075 INFO L225 Difference]: With dead ends: 20294 [2023-11-06 22:34:24,075 INFO L226 Difference]: Without dead ends: 10266 [2023-11-06 22:34:24,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1378 GetRequests, 1368 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:34:24,109 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1253 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:24,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 1195 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:34:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10266 states. [2023-11-06 22:34:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10266 to 10146. [2023-11-06 22:34:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 7740 states have (on average 1.6674418604651162) internal successors, (12906), 7785 states have internal predecessors, (12906), 2327 states have call successors, (2327), 78 states have call predecessors, (2327), 78 states have return successors, (2327), 2282 states have call predecessors, (2327), 2327 states have call successors, (2327) [2023-11-06 22:34:25,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 17560 transitions. [2023-11-06 22:34:25,355 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 17560 transitions. Word has length 688 [2023-11-06 22:34:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:25,357 INFO L495 AbstractCegarLoop]: Abstraction has 10146 states and 17560 transitions. [2023-11-06 22:34:25,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) [2023-11-06 22:34:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 17560 transitions. [2023-11-06 22:34:25,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2023-11-06 22:34:25,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:25,379 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:25,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:25,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:25,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash 478385918, now seen corresponding path program 1 times [2023-11-06 22:34:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:25,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286991790] [2023-11-06 22:34:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:25,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:25,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:25,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643629912] [2023-11-06 22:34:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:25,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:25,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:25,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:34:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:26,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:26,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10635 proven. 120 refuted. 0 times theorem prover too weak. 11505 trivial. 0 not checked. [2023-11-06 22:34:26,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 195 proven. 120 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286991790] [2023-11-06 22:34:27,315 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:27,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643629912] [2023-11-06 22:34:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643629912] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:27,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:27,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:34:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942293552] [2023-11-06 22:34:27,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:27,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:34:27,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:27,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:34:27,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:34:27,323 INFO L87 Difference]: Start difference. First operand 10146 states and 17560 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 2 states have call predecessors, (147), 2 states have call successors, (147) [2023-11-06 22:34:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:28,794 INFO L93 Difference]: Finished difference Result 20374 states and 35151 transitions. [2023-11-06 22:34:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:34:28,794 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 2 states have call predecessors, (147), 2 states have call successors, (147) Word has length 689 [2023-11-06 22:34:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:28,831 INFO L225 Difference]: With dead ends: 20374 [2023-11-06 22:34:28,832 INFO L226 Difference]: Without dead ends: 10298 [2023-11-06 22:34:28,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1370 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 22:34:28,863 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 659 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:28,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 1202 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:34:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10298 states. [2023-11-06 22:34:30,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10298 to 10178. [2023-11-06 22:34:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10178 states, 7764 states have (on average 1.660741885625966) internal successors, (12894), 7809 states have internal predecessors, (12894), 2327 states have call successors, (2327), 86 states have call predecessors, (2327), 86 states have return successors, (2327), 2282 states have call predecessors, (2327), 2327 states have call successors, (2327) [2023-11-06 22:34:30,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10178 states to 10178 states and 17548 transitions. [2023-11-06 22:34:30,132 INFO L78 Accepts]: Start accepts. Automaton has 10178 states and 17548 transitions. Word has length 689 [2023-11-06 22:34:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:30,134 INFO L495 AbstractCegarLoop]: Abstraction has 10178 states and 17548 transitions. [2023-11-06 22:34:30,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 2 states have call successors, (146), 2 states have call predecessors, (146), 4 states have return successors, (147), 2 states have call predecessors, (147), 2 states have call successors, (147) [2023-11-06 22:34:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 10178 states and 17548 transitions. [2023-11-06 22:34:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2023-11-06 22:34:30,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:30,163 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:30,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:30,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:30,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:30,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:30,373 INFO L85 PathProgramCache]: Analyzing trace with hash -139161411, now seen corresponding path program 1 times [2023-11-06 22:34:30,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:30,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828473164] [2023-11-06 22:34:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:30,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:30,481 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:30,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32500709] [2023-11-06 22:34:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:30,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:30,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:30,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:30,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:34:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:31,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:34:31,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:32,127 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:34:32,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:34:32,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828473164] [2023-11-06 22:34:32,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32500709] [2023-11-06 22:34:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32500709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:34:32,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:34:32,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:34:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762431090] [2023-11-06 22:34:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:34:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:34:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:34:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:34:32,133 INFO L87 Difference]: Start difference. First operand 10178 states and 17548 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:34,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:34,579 INFO L93 Difference]: Finished difference Result 39182 states and 67662 transitions. [2023-11-06 22:34:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:34:34,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 690 [2023-11-06 22:34:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:34,685 INFO L225 Difference]: With dead ends: 39182 [2023-11-06 22:34:34,685 INFO L226 Difference]: Without dead ends: 29074 [2023-11-06 22:34:34,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 690 GetRequests, 686 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 22:34:34,711 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 682 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2726 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:34,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 2726 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:34:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29074 states. [2023-11-06 22:34:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29074 to 21132. [2023-11-06 22:34:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 16347 states have (on average 1.6711323178564874) internal successors, (27318), 16436 states have internal predecessors, (27318), 4611 states have call successors, (4611), 173 states have call predecessors, (4611), 173 states have return successors, (4611), 4522 states have call predecessors, (4611), 4611 states have call successors, (4611) [2023-11-06 22:34:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 36540 transitions. [2023-11-06 22:34:37,454 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 36540 transitions. Word has length 690 [2023-11-06 22:34:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:37,455 INFO L495 AbstractCegarLoop]: Abstraction has 21132 states and 36540 transitions. [2023-11-06 22:34:37,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 4 states have internal predecessors, (163), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:34:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 36540 transitions. [2023-11-06 22:34:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2023-11-06 22:34:37,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:37,493 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:37,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:34:37,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:37,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash -456158651, now seen corresponding path program 1 times [2023-11-06 22:34:37,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:37,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145680398] [2023-11-06 22:34:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:38,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:38,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960696902] [2023-11-06 22:34:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:38,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:38,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:34:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:38,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 1643 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:34:38,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 11079 proven. 138 refuted. 0 times theorem prover too weak. 11043 trivial. 0 not checked. [2023-11-06 22:34:39,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 177 proven. 138 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:39,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:39,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145680398] [2023-11-06 22:34:39,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960696902] [2023-11-06 22:34:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960696902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:39,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:39,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-06 22:34:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914341008] [2023-11-06 22:34:39,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:39,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:34:39,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:39,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:34:39,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:34:39,915 INFO L87 Difference]: Start difference. First operand 21132 states and 36540 transitions. Second operand has 10 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) [2023-11-06 22:34:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:41,968 INFO L93 Difference]: Finished difference Result 43104 states and 74358 transitions. [2023-11-06 22:34:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:34:41,969 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) Word has length 691 [2023-11-06 22:34:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:42,043 INFO L225 Difference]: With dead ends: 43104 [2023-11-06 22:34:42,043 INFO L226 Difference]: Without dead ends: 22046 [2023-11-06 22:34:42,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 1372 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:34:42,076 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 687 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:42,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 1656 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:34:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22046 states. [2023-11-06 22:34:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22046 to 21228. [2023-11-06 22:34:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21228 states, 16443 states have (on average 1.6672140120415984) internal successors, (27414), 16532 states have internal predecessors, (27414), 4611 states have call successors, (4611), 173 states have call predecessors, (4611), 173 states have return successors, (4611), 4522 states have call predecessors, (4611), 4611 states have call successors, (4611) [2023-11-06 22:34:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21228 states to 21228 states and 36636 transitions. [2023-11-06 22:34:44,237 INFO L78 Accepts]: Start accepts. Automaton has 21228 states and 36636 transitions. Word has length 691 [2023-11-06 22:34:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:44,239 INFO L495 AbstractCegarLoop]: Abstraction has 21228 states and 36636 transitions. [2023-11-06 22:34:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.4) internal successors, (264), 10 states have internal predecessors, (264), 3 states have call successors, (152), 2 states have call predecessors, (152), 4 states have return successors, (153), 3 states have call predecessors, (153), 3 states have call successors, (153) [2023-11-06 22:34:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 21228 states and 36636 transitions. [2023-11-06 22:34:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2023-11-06 22:34:44,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:44,267 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:44,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:34:44,482 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:44,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1646121082, now seen corresponding path program 1 times [2023-11-06 22:34:44,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:44,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499393892] [2023-11-06 22:34:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:44,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:44,573 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259684586] [2023-11-06 22:34:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:44,575 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:44,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:34:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:45,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:45,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10479 proven. 198 refuted. 0 times theorem prover too weak. 11583 trivial. 0 not checked. [2023-11-06 22:34:45,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 117 proven. 198 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:46,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499393892] [2023-11-06 22:34:46,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:46,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259684586] [2023-11-06 22:34:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259684586] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:46,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:46,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 22:34:46,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157618277] [2023-11-06 22:34:46,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:34:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:34:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:34:46,727 INFO L87 Difference]: Start difference. First operand 21228 states and 36636 transitions. Second operand has 8 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 3 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 3 states have call predecessors, (173), 3 states have call successors, (173) [2023-11-06 22:34:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:48,783 INFO L93 Difference]: Finished difference Result 42772 states and 73509 transitions. [2023-11-06 22:34:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:34:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 3 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 3 states have call predecessors, (173), 3 states have call successors, (173) Word has length 692 [2023-11-06 22:34:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:48,853 INFO L225 Difference]: With dead ends: 42772 [2023-11-06 22:34:48,853 INFO L226 Difference]: Without dead ends: 21618 [2023-11-06 22:34:48,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1386 GetRequests, 1376 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:34:48,893 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 834 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:48,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1219 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:34:48,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21618 states. [2023-11-06 22:34:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21618 to 21376. [2023-11-06 22:34:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21376 states, 16554 states have (on average 1.6533164189923886) internal successors, (27369), 16643 states have internal predecessors, (27369), 4611 states have call successors, (4611), 210 states have call predecessors, (4611), 210 states have return successors, (4611), 4522 states have call predecessors, (4611), 4611 states have call successors, (4611) [2023-11-06 22:34:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21376 states to 21376 states and 36591 transitions. [2023-11-06 22:34:51,131 INFO L78 Accepts]: Start accepts. Automaton has 21376 states and 36591 transitions. Word has length 692 [2023-11-06 22:34:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:51,133 INFO L495 AbstractCegarLoop]: Abstraction has 21376 states and 36591 transitions. [2023-11-06 22:34:51,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.625) internal successors, (293), 8 states have internal predecessors, (293), 3 states have call successors, (172), 2 states have call predecessors, (172), 4 states have return successors, (173), 3 states have call predecessors, (173), 3 states have call successors, (173) [2023-11-06 22:34:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 21376 states and 36591 transitions. [2023-11-06 22:34:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-06 22:34:51,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:51,162 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:51,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:34:51,373 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:51,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1764613570, now seen corresponding path program 1 times [2023-11-06 22:34:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:51,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849449444] [2023-11-06 22:34:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:51,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:51,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810096917] [2023-11-06 22:34:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:51,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:51,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:51,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:51,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:34:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:52,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:52,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 8479 proven. 78 refuted. 0 times theorem prover too weak. 13703 trivial. 0 not checked. [2023-11-06 22:34:52,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 237 proven. 78 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849449444] [2023-11-06 22:34:52,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810096917] [2023-11-06 22:34:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810096917] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:52,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:52,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:34:52,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117446474] [2023-11-06 22:34:52,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:52,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:34:52,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:34:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:34:52,887 INFO L87 Difference]: Start difference. First operand 21376 states and 36591 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 2 states have call predecessors, (133), 2 states have call successors, (133) [2023-11-06 22:34:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:34:55,200 INFO L93 Difference]: Finished difference Result 42868 states and 73153 transitions. [2023-11-06 22:34:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:34:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 2 states have call predecessors, (133), 2 states have call successors, (133) Word has length 693 [2023-11-06 22:34:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:34:55,280 INFO L225 Difference]: With dead ends: 42868 [2023-11-06 22:34:55,280 INFO L226 Difference]: Without dead ends: 21570 [2023-11-06 22:34:55,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1378 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 22:34:55,326 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 736 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:34:55,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 1217 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:34:55,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21570 states. [2023-11-06 22:34:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21570 to 21312. [2023-11-06 22:34:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21312 states, 16482 states have (on average 1.6350564251911175) internal successors, (26949), 16571 states have internal predecessors, (26949), 4611 states have call successors, (4611), 218 states have call predecessors, (4611), 218 states have return successors, (4611), 4522 states have call predecessors, (4611), 4611 states have call successors, (4611) [2023-11-06 22:34:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21312 states to 21312 states and 36171 transitions. [2023-11-06 22:34:57,839 INFO L78 Accepts]: Start accepts. Automaton has 21312 states and 36171 transitions. Word has length 693 [2023-11-06 22:34:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:34:57,840 INFO L495 AbstractCegarLoop]: Abstraction has 21312 states and 36171 transitions. [2023-11-06 22:34:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (132), 2 states have call predecessors, (132), 4 states have return successors, (133), 2 states have call predecessors, (133), 2 states have call successors, (133) [2023-11-06 22:34:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21312 states and 36171 transitions. [2023-11-06 22:34:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-06 22:34:57,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:34:57,855 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:57,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:34:58,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:34:58,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:34:58,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:34:58,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1929075390, now seen corresponding path program 1 times [2023-11-06 22:34:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:34:58,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551403696] [2023-11-06 22:34:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:58,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:34:58,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:34:58,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974498520] [2023-11-06 22:34:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:34:58,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:34:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:34:58,148 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:34:58,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:34:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:34:58,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:34:58,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:34:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 8883 proven. 84 refuted. 0 times theorem prover too weak. 13293 trivial. 0 not checked. [2023-11-06 22:34:59,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:34:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 231 proven. 84 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:34:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:34:59,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551403696] [2023-11-06 22:34:59,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:34:59,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974498520] [2023-11-06 22:34:59,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974498520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:34:59,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:34:59,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:34:59,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991561580] [2023-11-06 22:34:59,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:34:59,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:34:59,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:34:59,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:34:59,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:34:59,656 INFO L87 Difference]: Start difference. First operand 21312 states and 36171 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-06 22:35:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:01,109 INFO L93 Difference]: Finished difference Result 34418 states and 58619 transitions. [2023-11-06 22:35:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:35:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) Word has length 693 [2023-11-06 22:35:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:01,136 INFO L225 Difference]: With dead ends: 34418 [2023-11-06 22:35:01,137 INFO L226 Difference]: Without dead ends: 13184 [2023-11-06 22:35:01,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1378 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 22:35:01,170 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 708 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:01,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 1211 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:35:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2023-11-06 22:35:02,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 13030. [2023-11-06 22:35:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13030 states, 10460 states have (on average 1.6587954110898662) internal successors, (17351), 10501 states have internal predecessors, (17351), 2447 states have call successors, (2447), 122 states have call predecessors, (2447), 122 states have return successors, (2447), 2406 states have call predecessors, (2447), 2447 states have call successors, (2447) [2023-11-06 22:35:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13030 states to 13030 states and 22245 transitions. [2023-11-06 22:35:02,611 INFO L78 Accepts]: Start accepts. Automaton has 13030 states and 22245 transitions. Word has length 693 [2023-11-06 22:35:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:02,612 INFO L495 AbstractCegarLoop]: Abstraction has 13030 states and 22245 transitions. [2023-11-06 22:35:02,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (134), 2 states have call predecessors, (134), 4 states have return successors, (135), 2 states have call predecessors, (135), 2 states have call successors, (135) [2023-11-06 22:35:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13030 states and 22245 transitions. [2023-11-06 22:35:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-06 22:35:02,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:02,632 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:35:02,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:02,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:35:02,834 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:02,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1376698754, now seen corresponding path program 1 times [2023-11-06 22:35:02,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:02,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640492999] [2023-11-06 22:35:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:02,941 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:35:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418596394] [2023-11-06 22:35:02,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:02,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:02,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:02,944 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:02,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:35:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:03,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:35:03,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22260 trivial. 0 not checked. [2023-11-06 22:35:04,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:35:04,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:04,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640492999] [2023-11-06 22:35:04,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:35:04,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418596394] [2023-11-06 22:35:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418596394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:35:04,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:35:04,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 22:35:04,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017034060] [2023-11-06 22:35:04,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:35:04,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:35:04,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:35:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:35:04,925 INFO L87 Difference]: Start difference. First operand 13030 states and 22245 transitions. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:35:07,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:07,523 INFO L93 Difference]: Finished difference Result 32978 states and 56424 transitions. [2023-11-06 22:35:07,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:35:07,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) Word has length 693 [2023-11-06 22:35:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:07,557 INFO L225 Difference]: With dead ends: 32978 [2023-11-06 22:35:07,557 INFO L226 Difference]: Without dead ends: 20026 [2023-11-06 22:35:07,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:35:07,574 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 1848 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1848 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:07,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1848 Valid, 3035 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:35:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20026 states. [2023-11-06 22:35:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20026 to 18408. [2023-11-06 22:35:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18408 states, 15118 states have (on average 1.665498081756846) internal successors, (25179), 15183 states have internal predecessors, (25179), 3143 states have call successors, (3143), 146 states have call predecessors, (3143), 146 states have return successors, (3143), 3078 states have call predecessors, (3143), 3143 states have call successors, (3143) [2023-11-06 22:35:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18408 states to 18408 states and 31465 transitions. [2023-11-06 22:35:09,003 INFO L78 Accepts]: Start accepts. Automaton has 18408 states and 31465 transitions. Word has length 693 [2023-11-06 22:35:09,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:35:09,003 INFO L495 AbstractCegarLoop]: Abstraction has 18408 states and 31465 transitions. [2023-11-06 22:35:09,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 6 states have internal predecessors, (166), 1 states have call successors, (106), 1 states have call predecessors, (106), 1 states have return successors, (106), 1 states have call predecessors, (106), 1 states have call successors, (106) [2023-11-06 22:35:09,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18408 states and 31465 transitions. [2023-11-06 22:35:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 694 [2023-11-06 22:35:09,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:35:09,018 INFO L195 NwaCegarLoop]: trace histogram [106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:35:09,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:35:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:35:09,218 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:35:09,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:35:09,219 INFO L85 PathProgramCache]: Analyzing trace with hash 318860676, now seen corresponding path program 1 times [2023-11-06 22:35:09,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:35:09,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458866765] [2023-11-06 22:35:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:09,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:35:09,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:35:09,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37767990] [2023-11-06 22:35:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:35:09,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:35:09,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:35:09,309 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:35:09,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3849053d-85b2-4eb5-a16a-20630af0f59f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:35:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:35:09,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:35:10,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:35:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10635 proven. 120 refuted. 0 times theorem prover too weak. 11505 trivial. 0 not checked. [2023-11-06 22:35:11,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:35:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 195 proven. 120 refuted. 0 times theorem prover too weak. 21945 trivial. 0 not checked. [2023-11-06 22:35:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:35:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458866765] [2023-11-06 22:35:12,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:35:12,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37767990] [2023-11-06 22:35:12,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37767990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:35:12,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:35:12,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:35:12,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689209534] [2023-11-06 22:35:12,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:35:12,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:35:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:35:12,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:35:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:35:12,023 INFO L87 Difference]: Start difference. First operand 18408 states and 31465 transitions. Second operand has 14 states, 14 states have (on average 18.142857142857142) internal successors, (254), 14 states have internal predecessors, (254), 4 states have call successors, (212), 3 states have call predecessors, (212), 5 states have return successors, (212), 4 states have call predecessors, (212), 4 states have call successors, (212) [2023-11-06 22:35:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:35:19,543 INFO L93 Difference]: Finished difference Result 58273 states and 99927 transitions. [2023-11-06 22:35:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:35:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 18.142857142857142) internal successors, (254), 14 states have internal predecessors, (254), 4 states have call successors, (212), 3 states have call predecessors, (212), 5 states have return successors, (212), 4 states have call predecessors, (212), 4 states have call successors, (212) Word has length 693 [2023-11-06 22:35:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:35:19,633 INFO L225 Difference]: With dead ends: 58273 [2023-11-06 22:35:19,633 INFO L226 Difference]: Without dead ends: 39943 [2023-11-06 22:35:19,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1379 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=847, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:35:19,670 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 7186 mSDsluCounter, 4799 mSDsCounter, 0 mSdLazyCounter, 2993 mSolverCounterSat, 1446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7419 SdHoareTripleChecker+Valid, 5320 SdHoareTripleChecker+Invalid, 4439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1446 IncrementalHoareTripleChecker+Valid, 2993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:35:19,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7419 Valid, 5320 Invalid, 4439 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1446 Valid, 2993 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 22:35:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39943 states.