./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/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_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/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_c622f540-53a9-4a9c-b395-65c9f0f928ba/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 6879d183ea614705b8dec9095f843a55526481f961ca46c6ec00dfff8309d4ce --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:50,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:50,516 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:50,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:50,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:50,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:50,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:50,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:50,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:50,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:50,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:50,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:50,578 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:50,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:50,579 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:50,579 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:50,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:50,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:50,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:50,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:50,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:50,583 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:50,583 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:50,584 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:50,584 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:50,585 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:50,585 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:50,586 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:50,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:50,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:50,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:50,588 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:50,588 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:50,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:50,589 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:50,589 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:50,589 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:50,590 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:50,590 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:50,590 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_c622f540-53a9-4a9c-b395-65c9f0f928ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6879d183ea614705b8dec9095f843a55526481f961ca46c6ec00dfff8309d4ce [2023-11-06 22:00:50,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:50,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:50,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:50,946 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:50,946 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:50,948 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i [2023-11-06 22:00:54,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:00:54,351 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:00:54,352 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i [2023-11-06 22:00:54,363 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/data/d6e5ed843/a759a4ac1a2f4f289b8c3a78e5c3a088/FLAG4f19d2806 [2023-11-06 22:00:54,384 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/data/d6e5ed843/a759a4ac1a2f4f289b8c3a78e5c3a088 [2023-11-06 22:00:54,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:00:54,389 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:00:54,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:54,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:00:54,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:00:54,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320463a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54, skipping insertion in model container [2023-11-06 22:00:54,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,444 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:00:54,603 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_c622f540-53a9-4a9c-b395-65c9f0f928ba/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i[915,928] [2023-11-06 22:00:54,666 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:54,683 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:00:54,705 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_c622f540-53a9-4a9c-b395-65c9f0f928ba/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount50_file-34.i[915,928] [2023-11-06 22:00:54,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:00:54,761 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:00:54,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54 WrapperNode [2023-11-06 22:00:54,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:00:54,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:54,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:00:54,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:00:54,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,853 INFO L138 Inliner]: procedures = 26, calls = 26, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 172 [2023-11-06 22:00:54,854 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:00:54,855 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:00:54,855 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:00:54,855 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:00:54,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,900 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,903 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,905 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:00:54,911 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:00:54,911 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:00:54,911 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:00:54,912 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (1/1) ... [2023-11-06 22:00:54,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:54,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:54,959 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:00:54,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:00:55,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:00:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:00:55,015 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:00:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:00:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:00:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:00:55,157 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:00:55,160 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:00:55,772 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:00:55,780 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:00:55,780 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:00:55,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:55 BoogieIcfgContainer [2023-11-06 22:00:55,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:00:55,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:00:55,787 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:00:55,790 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:00:55,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:00:54" (1/3) ... [2023-11-06 22:00:55,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be224a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:55, skipping insertion in model container [2023-11-06 22:00:55,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:00:54" (2/3) ... [2023-11-06 22:00:55,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4be224a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:00:55, skipping insertion in model container [2023-11-06 22:00:55,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:00:55" (3/3) ... [2023-11-06 22:00:55,794 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount50_file-34.i [2023-11-06 22:00:55,815 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:00:55,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:00:55,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:00:55,894 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;@60c68434, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:00:55,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:00:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 52 states have internal predecessors, (78), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:00:55,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-06 22:00:55,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:55,916 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:55,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:55,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:55,921 INFO L85 PathProgramCache]: Analyzing trace with hash -39795977, now seen corresponding path program 1 times [2023-11-06 22:00:55,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:55,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80291146] [2023-11-06 22:00:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:55,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:56,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80291146] [2023-11-06 22:00:56,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:00:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733326849] [2023-11-06 22:00:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:56,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:56,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:00:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:56,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:00:56,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-06 22:00:56,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:56,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733326849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:56,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:56,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:00:56,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120892178] [2023-11-06 22:00:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:56,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:00:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:00:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:56,554 INFO L87 Difference]: Start difference. First operand has 67 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 52 states have internal predecessors, (78), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:00:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:56,599 INFO L93 Difference]: Finished difference Result 127 states and 215 transitions. [2023-11-06 22:00:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:00:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 94 [2023-11-06 22:00:56,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:56,612 INFO L225 Difference]: With dead ends: 127 [2023-11-06 22:00:56,613 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 22:00:56,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:00:56,622 INFO L413 NwaCegarLoop]: 97 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, 97 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:56,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:00:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 22:00:56,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-06 22:00:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 48 states have internal predecessors, (71), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:00:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 97 transitions. [2023-11-06 22:00:56,682 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 97 transitions. Word has length 94 [2023-11-06 22:00:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:56,683 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 97 transitions. [2023-11-06 22:00:56,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:00:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 97 transitions. [2023-11-06 22:00:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-06 22:00:56,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:56,694 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:56,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:56,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:56,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:56,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash -167527047, now seen corresponding path program 1 times [2023-11-06 22:00:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:56,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115363990] [2023-11-06 22:00:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:56,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:57,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:57,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697958438] [2023-11-06 22:00:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:57,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:57,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:57,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:00:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:57,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:00:57,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:00:57,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115363990] [2023-11-06 22:00:57,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:57,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697958438] [2023-11-06 22:00:57,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697958438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:57,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:00:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281976461] [2023-11-06 22:00:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:57,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:00:57,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:57,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:00:57,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:57,490 INFO L87 Difference]: Start difference. First operand 63 states and 97 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:00:57,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:57,771 INFO L93 Difference]: Finished difference Result 184 states and 284 transitions. [2023-11-06 22:00:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:00:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 94 [2023-11-06 22:00:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:57,775 INFO L225 Difference]: With dead ends: 184 [2023-11-06 22:00:57,776 INFO L226 Difference]: Without dead ends: 124 [2023-11-06 22:00:57,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:00:57,778 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 122 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:57,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 341 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:00:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-06 22:00:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 65. [2023-11-06 22:00:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.46) internal successors, (73), 50 states have internal predecessors, (73), 13 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-11-06 22:00:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 99 transitions. [2023-11-06 22:00:57,796 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 99 transitions. Word has length 94 [2023-11-06 22:00:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:57,798 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 99 transitions. [2023-11-06 22:00:57,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:00:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 99 transitions. [2023-11-06 22:00:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-06 22:00:57,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:57,801 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:57,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:58,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:58,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:58,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:58,009 INFO L85 PathProgramCache]: Analyzing trace with hash -751424581, now seen corresponding path program 1 times [2023-11-06 22:00:58,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:58,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227789903] [2023-11-06 22:00:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:58,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:58,053 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:58,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021984997] [2023-11-06 22:00:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:58,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:58,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:58,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:00:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:58,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:00:58,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:00:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:00:58,366 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:00:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:00:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227789903] [2023-11-06 22:00:58,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:00:58,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021984997] [2023-11-06 22:00:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021984997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:00:58,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:00:58,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:00:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407016632] [2023-11-06 22:00:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:00:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:00:58,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:00:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:00:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:00:58,370 INFO L87 Difference]: Start difference. First operand 65 states and 99 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:00:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:00:58,489 INFO L93 Difference]: Finished difference Result 219 states and 336 transitions. [2023-11-06 22:00:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:00:58,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 95 [2023-11-06 22:00:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:00:58,493 INFO L225 Difference]: With dead ends: 219 [2023-11-06 22:00:58,493 INFO L226 Difference]: Without dead ends: 157 [2023-11-06 22:00:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:00:58,496 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:00:58,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 307 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:00:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-06 22:00:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2023-11-06 22:00:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 98 states have (on average 1.4591836734693877) internal successors, (143), 98 states have internal predecessors, (143), 26 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-11-06 22:00:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 195 transitions. [2023-11-06 22:00:58,540 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 195 transitions. Word has length 95 [2023-11-06 22:00:58,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:00:58,541 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 195 transitions. [2023-11-06 22:00:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:00:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 195 transitions. [2023-11-06 22:00:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:00:58,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:00:58,550 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:00:58,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:00:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-06 22:00:58,757 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:00:58,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:00:58,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1055910815, now seen corresponding path program 1 times [2023-11-06 22:00:58,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:00:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672781863] [2023-11-06 22:00:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:58,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:00:58,833 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:00:58,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924448876] [2023-11-06 22:00:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:00:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:00:58,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:00:58,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:00:58,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:00:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:00:59,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-06 22:00:59,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 45 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-06 22:01:07,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:01:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672781863] [2023-11-06 22:01:24,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:01:24,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924448876] [2023-11-06 22:01:24,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924448876] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:24,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:24,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [21] total 28 [2023-11-06 22:01:24,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569891876] [2023-11-06 22:01:24,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:24,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:01:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:01:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:01:24,088 INFO L87 Difference]: Start difference. First operand 127 states and 195 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:01:33,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:01:35,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:02:02,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-06 22:02:07,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:07,472 INFO L93 Difference]: Finished difference Result 384 states and 576 transitions. [2023-11-06 22:02:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:02:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-06 22:02:07,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:07,477 INFO L225 Difference]: With dead ends: 384 [2023-11-06 22:02:07,477 INFO L226 Difference]: Without dead ends: 260 [2023-11-06 22:02:07,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 22:02:07,481 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 303 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:07,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 429 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 266 Invalid, 2 Unknown, 0 Unchecked, 27.2s Time] [2023-11-06 22:02:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-06 22:02:07,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2023-11-06 22:02:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.4285714285714286) internal successors, (190), 134 states have internal predecessors, (190), 31 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-06 22:02:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 252 transitions. [2023-11-06 22:02:07,558 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 252 transitions. Word has length 96 [2023-11-06 22:02:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:07,558 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 252 transitions. [2023-11-06 22:02:07,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:02:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 252 transitions. [2023-11-06 22:02:07,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:02:07,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:07,561 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:07,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:07,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:07,768 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:07,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash 719096547, now seen corresponding path program 1 times [2023-11-06 22:02:07,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:07,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861068811] [2023-11-06 22:02:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:07,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:07,835 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:07,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786490784] [2023-11-06 22:02:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:07,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:07,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:07,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:07,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:02:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:07,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:02:07,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:02:15,820 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:15,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861068811] [2023-11-06 22:02:15,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:15,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786490784] [2023-11-06 22:02:15,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786490784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:15,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:15,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:02:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825893674] [2023-11-06 22:02:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:02:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:02:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:02:15,824 INFO L87 Difference]: Start difference. First operand 169 states and 252 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:02:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:24,449 INFO L93 Difference]: Finished difference Result 522 states and 773 transitions. [2023-11-06 22:02:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:02:24,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-06 22:02:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:24,456 INFO L225 Difference]: With dead ends: 522 [2023-11-06 22:02:24,456 INFO L226 Difference]: Without dead ends: 443 [2023-11-06 22:02:24,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:02:24,459 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 389 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:24,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 646 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-06 22:02:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-06 22:02:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 386. [2023-11-06 22:02:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 305 states have (on average 1.4163934426229507) internal successors, (432), 306 states have internal predecessors, (432), 70 states have call successors, (70), 10 states have call predecessors, (70), 10 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-06 22:02:24,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 572 transitions. [2023-11-06 22:02:24,648 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 572 transitions. Word has length 96 [2023-11-06 22:02:24,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:24,649 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 572 transitions. [2023-11-06 22:02:24,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:02:24,649 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 572 transitions. [2023-11-06 22:02:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:02:24,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:24,652 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:24,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:24,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:24,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:24,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:24,860 INFO L85 PathProgramCache]: Analyzing trace with hash -375852445, now seen corresponding path program 1 times [2023-11-06 22:02:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959097630] [2023-11-06 22:02:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:24,896 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844616756] [2023-11-06 22:02:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:24,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:02:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:25,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:02:25,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 96 proven. 30 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-06 22:02:26,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:39,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:39,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959097630] [2023-11-06 22:02:39,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:39,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844616756] [2023-11-06 22:02:39,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844616756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:39,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:02:39,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-06 22:02:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794690349] [2023-11-06 22:02:39,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:39,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:02:39,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:02:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:02:39,351 INFO L87 Difference]: Start difference. First operand 386 states and 572 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:02:40,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:40,944 INFO L93 Difference]: Finished difference Result 1192 states and 1751 transitions. [2023-11-06 22:02:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:02:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 96 [2023-11-06 22:02:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:40,952 INFO L225 Difference]: With dead ends: 1192 [2023-11-06 22:02:40,952 INFO L226 Difference]: Without dead ends: 817 [2023-11-06 22:02:40,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:02:40,955 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 290 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:40,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 446 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:02:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2023-11-06 22:02:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 652. [2023-11-06 22:02:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 561 states have (on average 1.4313725490196079) internal successors, (803), 561 states have internal predecessors, (803), 78 states have call successors, (78), 12 states have call predecessors, (78), 12 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-06 22:02:41,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 959 transitions. [2023-11-06 22:02:41,157 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 959 transitions. Word has length 96 [2023-11-06 22:02:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:41,158 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 959 transitions. [2023-11-06 22:02:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:02:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 959 transitions. [2023-11-06 22:02:41,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:02:41,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:41,160 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:41,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:41,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:41,367 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:41,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1968923410, now seen corresponding path program 1 times [2023-11-06 22:02:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:41,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490196832] [2023-11-06 22:02:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:41,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:41,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915267994] [2023-11-06 22:02:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:41,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:41,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:41,417 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:41,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:02:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:41,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:02:41,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 198 proven. 39 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-06 22:02:42,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-06 22:02:44,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:44,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490196832] [2023-11-06 22:02:44,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:44,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915267994] [2023-11-06 22:02:44,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915267994] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:44,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:02:44,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-06 22:02:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690588844] [2023-11-06 22:02:44,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:44,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:02:44,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:02:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:02:44,747 INFO L87 Difference]: Start difference. First operand 652 states and 959 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-06 22:02:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:56,662 INFO L93 Difference]: Finished difference Result 3267 states and 4724 transitions. [2023-11-06 22:02:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-06 22:02:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 96 [2023-11-06 22:02:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:56,682 INFO L225 Difference]: With dead ends: 3267 [2023-11-06 22:02:56,682 INFO L226 Difference]: Without dead ends: 3049 [2023-11-06 22:02:56,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1464, Invalid=5508, Unknown=0, NotChecked=0, Total=6972 [2023-11-06 22:02:56,687 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1723 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 1634 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:56,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1736 Valid, 1227 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1634 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-06 22:02:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2023-11-06 22:02:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 1730. [2023-11-06 22:02:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1398 states have (on average 1.388412017167382) internal successors, (1941), 1403 states have internal predecessors, (1941), 269 states have call successors, (269), 62 states have call predecessors, (269), 62 states have return successors, (269), 264 states have call predecessors, (269), 269 states have call successors, (269) [2023-11-06 22:02:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2479 transitions. [2023-11-06 22:02:57,351 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 2479 transitions. Word has length 96 [2023-11-06 22:02:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:57,352 INFO L495 AbstractCegarLoop]: Abstraction has 1730 states and 2479 transitions. [2023-11-06 22:02:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 24 states have internal predecessors, (73), 6 states have call successors, (26), 4 states have call predecessors, (26), 7 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-11-06 22:02:57,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 2479 transitions. [2023-11-06 22:02:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:02:57,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:57,355 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:57,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:57,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:57,561 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:57,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2067028065, now seen corresponding path program 1 times [2023-11-06 22:02:57,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761672966] [2023-11-06 22:02:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:57,602 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:02:57,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319297148] [2023-11-06 22:02:57,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:57,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:57,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:02:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:58,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:02:58,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:02:58,620 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:02:58,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:58,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761672966] [2023-11-06 22:02:58,620 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:02:58,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319297148] [2023-11-06 22:02:58,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319297148] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:58,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:58,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:02:58,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010413456] [2023-11-06 22:02:58,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:58,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:02:58,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:02:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:02:58,622 INFO L87 Difference]: Start difference. First operand 1730 states and 2479 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:02:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:59,430 INFO L93 Difference]: Finished difference Result 2382 states and 3430 transitions. [2023-11-06 22:02:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:02:59,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-06 22:02:59,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:59,440 INFO L225 Difference]: With dead ends: 2382 [2023-11-06 22:02:59,441 INFO L226 Difference]: Without dead ends: 1480 [2023-11-06 22:02:59,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:02:59,444 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 66 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:59,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 224 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:02:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-11-06 22:03:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1478. [2023-11-06 22:03:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1180 states have (on average 1.3771186440677967) internal successors, (1625), 1185 states have internal predecessors, (1625), 243 states have call successors, (243), 54 states have call predecessors, (243), 54 states have return successors, (243), 238 states have call predecessors, (243), 243 states have call successors, (243) [2023-11-06 22:03:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2111 transitions. [2023-11-06 22:03:00,068 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2111 transitions. Word has length 96 [2023-11-06 22:03:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:00,069 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 2111 transitions. [2023-11-06 22:03:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2111 transitions. [2023-11-06 22:03:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-06 22:03:00,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:00,071 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:00,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 22:03:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:00,283 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:00,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1740164901, now seen corresponding path program 1 times [2023-11-06 22:03:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:00,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259336659] [2023-11-06 22:03:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:00,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420298590] [2023-11-06 22:03:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:00,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:00,312 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:00,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:03:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:00,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:03:00,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:03:06,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:06,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259336659] [2023-11-06 22:03:06,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420298590] [2023-11-06 22:03:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420298590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:03:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123857245] [2023-11-06 22:03:06,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:06,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:03:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:03:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:03:06,914 INFO L87 Difference]: Start difference. First operand 1478 states and 2111 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:16,093 INFO L93 Difference]: Finished difference Result 2503 states and 3617 transitions. [2023-11-06 22:03:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:03:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 96 [2023-11-06 22:03:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:16,104 INFO L225 Difference]: With dead ends: 2503 [2023-11-06 22:03:16,104 INFO L226 Difference]: Without dead ends: 1714 [2023-11-06 22:03:16,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:03:16,108 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 332 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 664 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-06 22:03:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2023-11-06 22:03:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1498. [2023-11-06 22:03:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1200 states have (on average 1.3775) internal successors, (1653), 1205 states have internal predecessors, (1653), 243 states have call successors, (243), 54 states have call predecessors, (243), 54 states have return successors, (243), 238 states have call predecessors, (243), 243 states have call successors, (243) [2023-11-06 22:03:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 2139 transitions. [2023-11-06 22:03:16,752 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 2139 transitions. Word has length 96 [2023-11-06 22:03:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:16,753 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 2139 transitions. [2023-11-06 22:03:16,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 2139 transitions. [2023-11-06 22:03:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-06 22:03:16,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:16,757 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:16,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:16,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:16,974 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:16,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:16,975 INFO L85 PathProgramCache]: Analyzing trace with hash 953215592, now seen corresponding path program 1 times [2023-11-06 22:03:16,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:16,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369802517] [2023-11-06 22:03:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:16,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:17,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:17,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255853740] [2023-11-06 22:03:17,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:17,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:17,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:17,007 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:17,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:03:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:17,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 22:03:17,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 213 proven. 66 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-06 22:03:19,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:03:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:03:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:24,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369802517] [2023-11-06 22:03:24,276 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:24,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255853740] [2023-11-06 22:03:24,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255853740] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:03:24,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:03:24,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [24] total 32 [2023-11-06 22:03:24,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733117719] [2023-11-06 22:03:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:03:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:03:24,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2023-11-06 22:03:24,280 INFO L87 Difference]: Start difference. First operand 1498 states and 2139 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:31,087 INFO L93 Difference]: Finished difference Result 2422 states and 3480 transitions. [2023-11-06 22:03:31,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:03:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 97 [2023-11-06 22:03:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:31,100 INFO L225 Difference]: With dead ends: 2422 [2023-11-06 22:03:31,101 INFO L226 Difference]: Without dead ends: 2008 [2023-11-06 22:03:31,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=332, Invalid=1390, Unknown=0, NotChecked=0, Total=1722 [2023-11-06 22:03:31,107 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 255 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:31,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 532 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-06 22:03:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2023-11-06 22:03:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1510. [2023-11-06 22:03:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1212 states have (on average 1.3754125412541254) internal successors, (1667), 1217 states have internal predecessors, (1667), 243 states have call successors, (243), 54 states have call predecessors, (243), 54 states have return successors, (243), 238 states have call predecessors, (243), 243 states have call successors, (243) [2023-11-06 22:03:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2153 transitions. [2023-11-06 22:03:31,931 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2153 transitions. Word has length 97 [2023-11-06 22:03:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 2153 transitions. [2023-11-06 22:03:31,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2153 transitions. [2023-11-06 22:03:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-06 22:03:31,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:31,934 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:31,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:32,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:03:32,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:32,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:32,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1566744342, now seen corresponding path program 1 times [2023-11-06 22:03:32,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:32,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086875966] [2023-11-06 22:03:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:32,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199208732] [2023-11-06 22:03:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:32,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:32,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:32,174 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:32,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:03:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:32,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:03:32,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:03:33,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:33,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086875966] [2023-11-06 22:03:33,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:33,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199208732] [2023-11-06 22:03:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199208732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:03:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977650927] [2023-11-06 22:03:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:33,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:03:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:03:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:03:33,952 INFO L87 Difference]: Start difference. First operand 1510 states and 2153 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:36,792 INFO L93 Difference]: Finished difference Result 2543 states and 3661 transitions. [2023-11-06 22:03:36,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:03:36,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 97 [2023-11-06 22:03:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:36,807 INFO L225 Difference]: With dead ends: 2543 [2023-11-06 22:03:36,807 INFO L226 Difference]: Without dead ends: 2266 [2023-11-06 22:03:36,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:03:36,810 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 536 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:36,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 804 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:03:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2023-11-06 22:03:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1946. [2023-11-06 22:03:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1568 states have (on average 1.3826530612244898) internal successors, (2168), 1575 states have internal predecessors, (2168), 309 states have call successors, (309), 68 states have call predecessors, (309), 68 states have return successors, (309), 302 states have call predecessors, (309), 309 states have call successors, (309) [2023-11-06 22:03:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2786 transitions. [2023-11-06 22:03:37,628 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2786 transitions. Word has length 97 [2023-11-06 22:03:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:37,629 INFO L495 AbstractCegarLoop]: Abstraction has 1946 states and 2786 transitions. [2023-11-06 22:03:37,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2786 transitions. [2023-11-06 22:03:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-06 22:03:37,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:37,632 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:37,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:37,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:03:37,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:37,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:37,846 INFO L85 PathProgramCache]: Analyzing trace with hash 21603560, now seen corresponding path program 1 times [2023-11-06 22:03:37,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:37,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673153450] [2023-11-06 22:03:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:37,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:37,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:37,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119811602] [2023-11-06 22:03:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:37,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:37,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:37,864 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:37,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:03:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:37,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:03:37,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-11-06 22:03:39,629 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:03:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:39,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673153450] [2023-11-06 22:03:39,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:03:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119811602] [2023-11-06 22:03:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119811602] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:39,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:03:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090107045] [2023-11-06 22:03:39,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:39,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:03:39,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:39,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:03:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:03:39,632 INFO L87 Difference]: Start difference. First operand 1946 states and 2786 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:03:42,937 INFO L93 Difference]: Finished difference Result 3563 states and 5131 transitions. [2023-11-06 22:03:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:03:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 97 [2023-11-06 22:03:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:03:42,954 INFO L225 Difference]: With dead ends: 3563 [2023-11-06 22:03:42,954 INFO L226 Difference]: Without dead ends: 3003 [2023-11-06 22:03:42,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2023-11-06 22:03:42,958 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 444 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:03:42,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 739 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 22:03:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2023-11-06 22:03:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2394. [2023-11-06 22:03:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2394 states, 1934 states have (on average 1.3888314374353672) internal successors, (2686), 1943 states have internal predecessors, (2686), 375 states have call successors, (375), 84 states have call predecessors, (375), 84 states have return successors, (375), 366 states have call predecessors, (375), 375 states have call successors, (375) [2023-11-06 22:03:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3436 transitions. [2023-11-06 22:03:43,923 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3436 transitions. Word has length 97 [2023-11-06 22:03:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:03:43,924 INFO L495 AbstractCegarLoop]: Abstraction has 2394 states and 3436 transitions. [2023-11-06 22:03:43,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (13), 1 states have call predecessors, (13), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2023-11-06 22:03:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3436 transitions. [2023-11-06 22:03:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-06 22:03:43,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:03:43,926 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:43,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:03:44,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:03:44,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:03:44,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash -705482888, now seen corresponding path program 1 times [2023-11-06 22:03:44,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:44,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175629027] [2023-11-06 22:03:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:44,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:03:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347996361] [2023-11-06 22:03:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:03:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:03:44,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:03:44,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:03:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:45,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:03:45,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:03:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 148 proven. 24 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-11-06 22:03:47,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:04:39,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:39,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175629027] [2023-11-06 22:04:39,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:04:39,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347996361] [2023-11-06 22:04:39,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347996361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:04:39,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:04:39,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-06 22:04:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090168704] [2023-11-06 22:04:39,871 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 22:04:39,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:04:39,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:04:39,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=599, Unknown=3, NotChecked=0, Total=702 [2023-11-06 22:04:39,873 INFO L87 Difference]: Start difference. First operand 2394 states and 3436 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:04:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:04:53,240 INFO L93 Difference]: Finished difference Result 3773 states and 5391 transitions. [2023-11-06 22:04:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:04:53,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 97 [2023-11-06 22:04:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:04:53,256 INFO L225 Difference]: With dead ends: 3773 [2023-11-06 22:04:53,256 INFO L226 Difference]: Without dead ends: 2806 [2023-11-06 22:04:53,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 37.5s TimeCoverageRelationStatistics Valid=458, Invalid=1891, Unknown=3, NotChecked=0, Total=2352 [2023-11-06 22:04:53,261 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 449 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:04:53,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 545 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 22:04:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2023-11-06 22:04:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2430. [2023-11-06 22:04:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1969 states have (on average 1.3869984763839514) internal successors, (2731), 1978 states have internal predecessors, (2731), 375 states have call successors, (375), 85 states have call predecessors, (375), 85 states have return successors, (375), 366 states have call predecessors, (375), 375 states have call successors, (375) [2023-11-06 22:04:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 3481 transitions. [2023-11-06 22:04:54,143 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 3481 transitions. Word has length 97 [2023-11-06 22:04:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:04:54,143 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 3481 transitions. [2023-11-06 22:04:54,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-11-06 22:04:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 3481 transitions. [2023-11-06 22:04:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-06 22:04:54,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:04:54,146 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:54,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:04:54,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:04:54,357 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:04:54,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:54,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1069524474, now seen corresponding path program 1 times [2023-11-06 22:04:54,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562158231] [2023-11-06 22:04:54,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:54,378 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:04:54,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509944224] [2023-11-06 22:04:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:54,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:04:54,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:54,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:04:54,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c622f540-53a9-4a9c-b395-65c9f0f928ba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:04:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:54,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 22:04:54,512 INFO L285 TraceCheckSpWp]: Computing forward predicates...