./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.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_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/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_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/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_0bee48e1-56bf-41b8-992b-41c4016e830a/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 10a5b91e206caf05061e8827c7f121f08b981a096162c865ff7d0b016f9308fd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:53:29,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:53:30,047 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:53:30,056 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:53:30,057 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:53:30,093 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:53:30,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:53:30,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:53:30,096 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:53:30,101 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:53:30,102 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:53:30,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:53:30,103 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:53:30,105 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:53:30,105 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:53:30,106 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:53:30,106 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:53:30,107 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:53:30,107 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:53:30,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:53:30,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:53:30,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:53:30,109 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:53:30,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:53:30,110 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:53:30,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:53:30,112 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:53:30,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:53:30,113 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:30,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:53:30,115 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:53:30,115 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:53:30,115 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:53:30,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:53:30,116 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:53:30,116 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:53:30,116 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:53:30,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:53:30,117 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:53:30,117 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_0bee48e1-56bf-41b8-992b-41c4016e830a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10a5b91e206caf05061e8827c7f121f08b981a096162c865ff7d0b016f9308fd [2023-11-06 21:53:30,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:53:30,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:53:30,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:53:30,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:53:30,494 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:53:30,496 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.i [2023-11-06 21:53:33,630 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:53:34,008 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:53:34,009 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.i [2023-11-06 21:53:34,027 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/data/5b4d86064/559d1d7f8970429b9048a243d49532c2/FLAG7cbf938f3 [2023-11-06 21:53:34,044 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/data/5b4d86064/559d1d7f8970429b9048a243d49532c2 [2023-11-06 21:53:34,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:53:34,049 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:53:34,050 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:34,051 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:53:34,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:53:34,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3745a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34, skipping insertion in model container [2023-11-06 21:53:34,059 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,118 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:53:34,347 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_0bee48e1-56bf-41b8-992b-41c4016e830a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.i[916,929] [2023-11-06 21:53:34,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:34,677 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:53:34,693 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_0bee48e1-56bf-41b8-992b-41c4016e830a/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-69.i[916,929] [2023-11-06 21:53:34,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:53:34,850 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:53:34,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34 WrapperNode [2023-11-06 21:53:34,851 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:53:34,852 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:34,853 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:53:34,853 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:53:34,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:34,894 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,002 INFO L138 Inliner]: procedures = 26, calls = 137, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 834 [2023-11-06 21:53:35,002 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:53:35,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:53:35,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:53:35,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:53:35,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,025 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,025 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,105 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:53:35,188 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:53:35,188 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:53:35,188 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:53:35,189 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (1/1) ... [2023-11-06 21:53:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:53:35,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:35,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:53:35,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:53:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:53:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 21:53:35,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 21:53:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:53:35,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:53:35,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:53:35,470 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:53:35,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:53:36,809 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:53:36,828 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:53:36,828 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:53:36,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:36 BoogieIcfgContainer [2023-11-06 21:53:36,832 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:53:36,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:53:36,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:53:36,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:53:36,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:53:34" (1/3) ... [2023-11-06 21:53:36,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bca617b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:36, skipping insertion in model container [2023-11-06 21:53:36,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:53:34" (2/3) ... [2023-11-06 21:53:36,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bca617b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:53:36, skipping insertion in model container [2023-11-06 21:53:36,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:53:36" (3/3) ... [2023-11-06 21:53:36,845 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-69.i [2023-11-06 21:53:36,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:53:36,865 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:53:36,929 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:53:36,937 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;@6e2b03c2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:53:36,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:53:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 340 states, 213 states have (on average 1.596244131455399) internal successors, (340), 214 states have internal predecessors, (340), 124 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-06 21:53:37,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:37,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:37,037 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:37,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:37,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1623892366, now seen corresponding path program 1 times [2023-11-06 21:53:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885129133] [2023-11-06 21:53:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885129133] [2023-11-06 21:53:37,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 21:53:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166359991] [2023-11-06 21:53:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:37,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:37,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:37,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:37,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:53:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:38,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 21:53:38,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 30258 trivial. 0 not checked. [2023-11-06 21:53:38,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:38,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166359991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:38,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:38,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:53:38,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128381018] [2023-11-06 21:53:38,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:38,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 21:53:38,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 21:53:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 21:53:38,306 INFO L87 Difference]: Start difference. First operand has 340 states, 213 states have (on average 1.596244131455399) internal successors, (340), 214 states have internal predecessors, (340), 124 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (124), 2 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-06 21:53:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:38,429 INFO L93 Difference]: Finished difference Result 673 states and 1294 transitions. [2023-11-06 21:53:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 21:53:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (124), 2 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 2 states have call successors, (124) Word has length 775 [2023-11-06 21:53:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:38,446 INFO L225 Difference]: With dead ends: 673 [2023-11-06 21:53:38,446 INFO L226 Difference]: Without dead ends: 336 [2023-11-06 21:53:38,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 774 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 21:53:38,457 INFO L413 NwaCegarLoop]: 579 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, 579 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 21:53:38,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2023-11-06 21:53:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2023-11-06 21:53:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 210 states have (on average 1.5761904761904761) internal successors, (331), 210 states have internal predecessors, (331), 124 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 124 states have call predecessors, (124), 124 states have call successors, (124) [2023-11-06 21:53:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 579 transitions. [2023-11-06 21:53:38,639 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 579 transitions. Word has length 775 [2023-11-06 21:53:38,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:38,642 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 579 transitions. [2023-11-06 21:53:38,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 2 states have call successors, (124), 2 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-06 21:53:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 579 transitions. [2023-11-06 21:53:38,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:38,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:38,684 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:38,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:38,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 21:53:38,895 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:38,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -157200850, now seen corresponding path program 1 times [2023-11-06 21:53:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:38,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978872298] [2023-11-06 21:53:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:39,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525968057] [2023-11-06 21:53:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:39,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:39,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:39,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:53:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:39,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:39,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:39,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:39,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:39,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978872298] [2023-11-06 21:53:39,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:39,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525968057] [2023-11-06 21:53:39,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525968057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:39,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:39,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123727723] [2023-11-06 21:53:39,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:39,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:39,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:39,987 INFO L87 Difference]: Start difference. First operand 336 states and 579 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:40,169 INFO L93 Difference]: Finished difference Result 1002 states and 1731 transitions. [2023-11-06 21:53:40,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:40,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 775 [2023-11-06 21:53:40,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:40,186 INFO L225 Difference]: With dead ends: 1002 [2023-11-06 21:53:40,186 INFO L226 Difference]: Without dead ends: 669 [2023-11-06 21:53:40,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:40,191 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 570 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:40,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1691 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-06 21:53:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 667. [2023-11-06 21:53:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 416 states have (on average 1.5769230769230769) internal successors, (656), 416 states have internal predecessors, (656), 248 states have call successors, (248), 2 states have call predecessors, (248), 2 states have return successors, (248), 248 states have call predecessors, (248), 248 states have call successors, (248) [2023-11-06 21:53:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1152 transitions. [2023-11-06 21:53:40,369 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1152 transitions. Word has length 775 [2023-11-06 21:53:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:40,374 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1152 transitions. [2023-11-06 21:53:40,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1152 transitions. [2023-11-06 21:53:40,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:40,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:40,389 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:40,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:40,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,599 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:40,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash -130135248, now seen corresponding path program 1 times [2023-11-06 21:53:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:40,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107751731] [2023-11-06 21:53:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:40,772 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474604986] [2023-11-06 21:53:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:40,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:40,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:40,779 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:40,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:53:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:41,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 1825 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:41,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:42,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:42,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107751731] [2023-11-06 21:53:42,624 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:42,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474604986] [2023-11-06 21:53:42,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474604986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:42,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:42,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:53:42,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696544396] [2023-11-06 21:53:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:42,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:42,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:42,631 INFO L87 Difference]: Start difference. First operand 667 states and 1152 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:42,746 INFO L93 Difference]: Finished difference Result 1660 states and 2869 transitions. [2023-11-06 21:53:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:42,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 775 [2023-11-06 21:53:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:42,759 INFO L225 Difference]: With dead ends: 1660 [2023-11-06 21:53:42,760 INFO L226 Difference]: Without dead ends: 996 [2023-11-06 21:53:42,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:42,765 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 233 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:42,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1352 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2023-11-06 21:53:42,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 994. [2023-11-06 21:53:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 618 states have (on average 1.5711974110032363) internal successors, (971), 618 states have internal predecessors, (971), 372 states have call successors, (372), 3 states have call predecessors, (372), 3 states have return successors, (372), 372 states have call predecessors, (372), 372 states have call successors, (372) [2023-11-06 21:53:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1715 transitions. [2023-11-06 21:53:42,969 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1715 transitions. Word has length 775 [2023-11-06 21:53:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:42,972 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1715 transitions. [2023-11-06 21:53:42,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1715 transitions. [2023-11-06 21:53:42,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:42,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:42,988 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:42,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:43,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:43,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash -987771090, now seen corresponding path program 1 times [2023-11-06 21:53:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:43,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883807272] [2023-11-06 21:53:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:43,311 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:43,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67643216] [2023-11-06 21:53:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:43,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:43,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:43,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:43,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:53:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:43,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:53:43,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:44,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:44,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883807272] [2023-11-06 21:53:44,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67643216] [2023-11-06 21:53:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67643216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:44,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:44,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:53:44,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577852015] [2023-11-06 21:53:44,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:44,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:53:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:53:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:44,012 INFO L87 Difference]: Start difference. First operand 994 states and 1715 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:44,365 INFO L93 Difference]: Finished difference Result 2547 states and 4428 transitions. [2023-11-06 21:53:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:53:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 775 [2023-11-06 21:53:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:44,382 INFO L225 Difference]: With dead ends: 2547 [2023-11-06 21:53:44,383 INFO L226 Difference]: Without dead ends: 1556 [2023-11-06 21:53:44,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 772 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:53:44,393 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 337 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:44,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1606 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:53:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2023-11-06 21:53:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1551. [2023-11-06 21:53:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1073 states have (on average 1.6467847157502329) internal successors, (1767), 1076 states have internal predecessors, (1767), 471 states have call successors, (471), 6 states have call predecessors, (471), 6 states have return successors, (471), 468 states have call predecessors, (471), 471 states have call successors, (471) [2023-11-06 21:53:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2709 transitions. [2023-11-06 21:53:44,737 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2709 transitions. Word has length 775 [2023-11-06 21:53:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:44,739 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2709 transitions. [2023-11-06 21:53:44,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2709 transitions. [2023-11-06 21:53:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:44,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:44,750 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:44,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:44,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:44,960 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:44,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:44,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2045609168, now seen corresponding path program 1 times [2023-11-06 21:53:44,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:44,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114973026] [2023-11-06 21:53:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:45,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:45,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376815849] [2023-11-06 21:53:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:45,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:45,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:45,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:45,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:53:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:45,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:45,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:45,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:45,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114973026] [2023-11-06 21:53:45,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376815849] [2023-11-06 21:53:45,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376815849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:45,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:45,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740373963] [2023-11-06 21:53:45,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:45,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:45,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:45,717 INFO L87 Difference]: Start difference. First operand 1551 states and 2709 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:45,896 INFO L93 Difference]: Finished difference Result 3101 states and 5424 transitions. [2023-11-06 21:53:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 775 [2023-11-06 21:53:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:45,917 INFO L225 Difference]: With dead ends: 3101 [2023-11-06 21:53:45,917 INFO L226 Difference]: Without dead ends: 2063 [2023-11-06 21:53:45,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:45,923 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 563 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:45,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1141 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2023-11-06 21:53:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2061. [2023-11-06 21:53:46,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1424 states have (on average 1.6446629213483146) internal successors, (2342), 1428 states have internal predecessors, (2342), 628 states have call successors, (628), 8 states have call predecessors, (628), 8 states have return successors, (628), 624 states have call predecessors, (628), 628 states have call successors, (628) [2023-11-06 21:53:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3598 transitions. [2023-11-06 21:53:46,408 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3598 transitions. Word has length 775 [2023-11-06 21:53:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:46,410 INFO L495 AbstractCegarLoop]: Abstraction has 2061 states and 3598 transitions. [2023-11-06 21:53:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3598 transitions. [2023-11-06 21:53:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-11-06 21:53:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:46,426 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:46,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:46,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:46,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -136287083, now seen corresponding path program 1 times [2023-11-06 21:53:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496363915] [2023-11-06 21:53:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:46,782 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:46,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534224821] [2023-11-06 21:53:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:46,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:46,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:46,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:53:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:47,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:47,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:47,444 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:47,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496363915] [2023-11-06 21:53:47,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:47,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534224821] [2023-11-06 21:53:47,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534224821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:47,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:47,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:47,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510089956] [2023-11-06 21:53:47,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:47,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:47,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:47,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:47,450 INFO L87 Difference]: Start difference. First operand 2061 states and 3598 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:47,711 INFO L93 Difference]: Finished difference Result 5529 states and 9700 transitions. [2023-11-06 21:53:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 775 [2023-11-06 21:53:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:47,739 INFO L225 Difference]: With dead ends: 5529 [2023-11-06 21:53:47,740 INFO L226 Difference]: Without dead ends: 3471 [2023-11-06 21:53:47,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 774 GetRequests, 773 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:47,750 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 310 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:47,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 1244 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3471 states. [2023-11-06 21:53:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3471 to 3455. [2023-11-06 21:53:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 2578 states have (on average 1.670287044220326) internal successors, (4306), 2590 states have internal predecessors, (4306), 860 states have call successors, (860), 16 states have call predecessors, (860), 16 states have return successors, (860), 848 states have call predecessors, (860), 860 states have call successors, (860) [2023-11-06 21:53:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 6026 transitions. [2023-11-06 21:53:48,231 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 6026 transitions. Word has length 775 [2023-11-06 21:53:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:48,232 INFO L495 AbstractCegarLoop]: Abstraction has 3455 states and 6026 transitions. [2023-11-06 21:53:48,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 6026 transitions. [2023-11-06 21:53:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2023-11-06 21:53:48,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:48,271 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:48,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:48,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:48,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:48,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:48,473 INFO L85 PathProgramCache]: Analyzing trace with hash -207928061, now seen corresponding path program 1 times [2023-11-06 21:53:48,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:48,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693043354] [2023-11-06 21:53:48,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:48,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:48,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716270852] [2023-11-06 21:53:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:48,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:48,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:48,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:48,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 21:53:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:49,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:49,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:49,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693043354] [2023-11-06 21:53:49,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716270852] [2023-11-06 21:53:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716270852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:49,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869620292] [2023-11-06 21:53:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:49,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:49,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:49,229 INFO L87 Difference]: Start difference. First operand 3455 states and 6026 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:49,454 INFO L93 Difference]: Finished difference Result 6949 states and 12082 transitions. [2023-11-06 21:53:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 776 [2023-11-06 21:53:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:49,516 INFO L225 Difference]: With dead ends: 6949 [2023-11-06 21:53:49,517 INFO L226 Difference]: Without dead ends: 3497 [2023-11-06 21:53:49,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:49,528 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 308 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:49,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1313 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:53:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3497 states. [2023-11-06 21:53:49,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3497 to 2767. [2023-11-06 21:53:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2767 states, 2122 states have (on average 1.6786050895381714) internal successors, (3562), 2126 states have internal predecessors, (3562), 628 states have call successors, (628), 16 states have call predecessors, (628), 16 states have return successors, (628), 624 states have call predecessors, (628), 628 states have call successors, (628) [2023-11-06 21:53:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2767 states to 2767 states and 4818 transitions. [2023-11-06 21:53:49,921 INFO L78 Accepts]: Start accepts. Automaton has 2767 states and 4818 transitions. Word has length 776 [2023-11-06 21:53:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:49,922 INFO L495 AbstractCegarLoop]: Abstraction has 2767 states and 4818 transitions. [2023-11-06 21:53:49,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2767 states and 4818 transitions. [2023-11-06 21:53:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-06 21:53:49,952 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:49,952 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:49,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:53:50,163 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:50,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash 294246543, now seen corresponding path program 1 times [2023-11-06 21:53:50,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:50,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316529723] [2023-11-06 21:53:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:50,259 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470584660] [2023-11-06 21:53:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:50,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:50,261 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:50,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 21:53:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:50,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:50,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:50,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:50,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316529723] [2023-11-06 21:53:51,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:51,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470584660] [2023-11-06 21:53:51,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470584660] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:51,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:51,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682991930] [2023-11-06 21:53:51,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:51,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:51,006 INFO L87 Difference]: Start difference. First operand 2767 states and 4818 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:51,253 INFO L93 Difference]: Finished difference Result 7679 states and 13416 transitions. [2023-11-06 21:53:51,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 778 [2023-11-06 21:53:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:51,294 INFO L225 Difference]: With dead ends: 7679 [2023-11-06 21:53:51,294 INFO L226 Difference]: Without dead ends: 4915 [2023-11-06 21:53:51,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:51,306 INFO L413 NwaCegarLoop]: 570 mSDtfsCounter, 332 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:51,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1130 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2023-11-06 21:53:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4909. [2023-11-06 21:53:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4909 states, 3976 states have (on average 1.7072434607645874) internal successors, (6788), 3988 states have internal predecessors, (6788), 900 states have call successors, (900), 32 states have call predecessors, (900), 32 states have return successors, (900), 888 states have call predecessors, (900), 900 states have call successors, (900) [2023-11-06 21:53:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 8588 transitions. [2023-11-06 21:53:51,840 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 8588 transitions. Word has length 778 [2023-11-06 21:53:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:51,842 INFO L495 AbstractCegarLoop]: Abstraction has 4909 states and 8588 transitions. [2023-11-06 21:53:51,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:51,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 8588 transitions. [2023-11-06 21:53:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 779 [2023-11-06 21:53:51,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:51,857 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:51,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:52,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 21:53:52,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:52,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1783090355, now seen corresponding path program 1 times [2023-11-06 21:53:52,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:52,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098413023] [2023-11-06 21:53:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:52,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:52,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674071876] [2023-11-06 21:53:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:52,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:52,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:52,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 21:53:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:52,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:52,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:52,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098413023] [2023-11-06 21:53:52,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674071876] [2023-11-06 21:53:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674071876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:52,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:52,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600976604] [2023-11-06 21:53:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:52,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:52,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:52,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:52,931 INFO L87 Difference]: Start difference. First operand 4909 states and 8588 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:53,331 INFO L93 Difference]: Finished difference Result 14625 states and 25566 transitions. [2023-11-06 21:53:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:53,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 778 [2023-11-06 21:53:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:53,395 INFO L225 Difference]: With dead ends: 14625 [2023-11-06 21:53:53,396 INFO L226 Difference]: Without dead ends: 9719 [2023-11-06 21:53:53,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:53,417 INFO L413 NwaCegarLoop]: 1088 mSDtfsCounter, 548 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1652 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:53,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1652 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:53,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9719 states. [2023-11-06 21:53:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9719 to 9717. [2023-11-06 21:53:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9717 states, 7852 states have (on average 1.6877228731533367) internal successors, (13252), 7876 states have internal predecessors, (13252), 1800 states have call successors, (1800), 64 states have call predecessors, (1800), 64 states have return successors, (1800), 1776 states have call predecessors, (1800), 1800 states have call successors, (1800) [2023-11-06 21:53:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9717 states to 9717 states and 16852 transitions. [2023-11-06 21:53:54,424 INFO L78 Accepts]: Start accepts. Automaton has 9717 states and 16852 transitions. Word has length 778 [2023-11-06 21:53:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:54,426 INFO L495 AbstractCegarLoop]: Abstraction has 9717 states and 16852 transitions. [2023-11-06 21:53:54,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 9717 states and 16852 transitions. [2023-11-06 21:53:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2023-11-06 21:53:54,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:54,453 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:54,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:54,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 21:53:54,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:54,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1897401679, now seen corresponding path program 1 times [2023-11-06 21:53:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:54,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164911849] [2023-11-06 21:53:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:54,810 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:54,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568029094] [2023-11-06 21:53:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:54,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:54,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:54,812 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:54,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 21:53:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:55,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 1831 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 21:53:55,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:53:55,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:53:55,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:53:55,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164911849] [2023-11-06 21:53:55,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:53:55,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568029094] [2023-11-06 21:53:55,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568029094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:53:55,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:53:55,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:53:55,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930323565] [2023-11-06 21:53:55,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:53:55,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:53:55,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:53:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:53:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:55,537 INFO L87 Difference]: Start difference. First operand 9717 states and 16852 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:53:56,278 INFO L93 Difference]: Finished difference Result 25705 states and 44446 transitions. [2023-11-06 21:53:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:53:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 779 [2023-11-06 21:53:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:53:56,335 INFO L225 Difference]: With dead ends: 25705 [2023-11-06 21:53:56,336 INFO L226 Difference]: Without dead ends: 15991 [2023-11-06 21:53:56,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:53:56,364 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 371 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1371 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:53:56,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1371 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:53:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15991 states. [2023-11-06 21:53:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15991 to 15981. [2023-11-06 21:53:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15981 states, 12524 states have (on average 1.6611306291919514) internal successors, (20804), 12580 states have internal predecessors, (20804), 3328 states have call successors, (3328), 128 states have call predecessors, (3328), 128 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:53:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15981 states to 15981 states and 27460 transitions. [2023-11-06 21:53:58,075 INFO L78 Accepts]: Start accepts. Automaton has 15981 states and 27460 transitions. Word has length 779 [2023-11-06 21:53:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:53:58,076 INFO L495 AbstractCegarLoop]: Abstraction has 15981 states and 27460 transitions. [2023-11-06 21:53:58,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:53:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15981 states and 27460 transitions. [2023-11-06 21:53:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2023-11-06 21:53:58,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:53:58,108 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:53:58,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 21:53:58,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 21:53:58,319 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:53:58,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:53:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash 131184431, now seen corresponding path program 1 times [2023-11-06 21:53:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:53:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696762936] [2023-11-06 21:53:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:53:58,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:53:58,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285076345] [2023-11-06 21:53:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:53:58,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:53:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:53:58,415 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:53:58,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 21:53:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:53:59,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 1830 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:53:59,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:53:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 15285 proven. 198 refuted. 0 times theorem prover too weak. 15021 trivial. 0 not checked. [2023-11-06 21:53:59,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 171 proven. 198 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2023-11-06 21:54:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696762936] [2023-11-06 21:54:00,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285076345] [2023-11-06 21:54:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285076345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:00,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:00,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-06 21:54:00,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188982567] [2023-11-06 21:54:00,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:00,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 21:54:00,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 21:54:00,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:00,607 INFO L87 Difference]: Start difference. First operand 15981 states and 27460 transitions. Second operand has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 3 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 3 states have call predecessors, (191), 3 states have call successors, (191) [2023-11-06 21:54:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:03,516 INFO L93 Difference]: Finished difference Result 32313 states and 55254 transitions. [2023-11-06 21:54:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 21:54:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 3 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 3 states have call predecessors, (191), 3 states have call successors, (191) Word has length 779 [2023-11-06 21:54:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:03,575 INFO L225 Difference]: With dead ends: 32313 [2023-11-06 21:54:03,575 INFO L226 Difference]: Without dead ends: 16335 [2023-11-06 21:54:03,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1563 GetRequests, 1546 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2023-11-06 21:54:03,609 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 2761 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2851 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 1977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:03,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2851 Valid, 1649 Invalid, 1977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 21:54:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16335 states. [2023-11-06 21:54:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16335 to 16045. [2023-11-06 21:54:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16045 states, 12572 states have (on average 1.6535157492841235) internal successors, (20788), 12628 states have internal predecessors, (20788), 3328 states have call successors, (3328), 144 states have call predecessors, (3328), 144 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:05,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16045 states to 16045 states and 27444 transitions. [2023-11-06 21:54:05,062 INFO L78 Accepts]: Start accepts. Automaton has 16045 states and 27444 transitions. Word has length 779 [2023-11-06 21:54:05,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:05,064 INFO L495 AbstractCegarLoop]: Abstraction has 16045 states and 27444 transitions. [2023-11-06 21:54:05,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.083333333333332) internal successors, (229), 12 states have internal predecessors, (229), 3 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 3 states have call predecessors, (191), 3 states have call successors, (191) [2023-11-06 21:54:05,064 INFO L276 IsEmpty]: Start isEmpty. Operand 16045 states and 27444 transitions. [2023-11-06 21:54:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2023-11-06 21:54:05,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:05,087 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:05,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:05,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 21:54:05,296 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:05,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2131838822, now seen corresponding path program 1 times [2023-11-06 21:54:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839469392] [2023-11-06 21:54:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:05,390 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:05,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717452364] [2023-11-06 21:54:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:05,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:05,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:05,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 21:54:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:06,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:06,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:54:06,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:06,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:06,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839469392] [2023-11-06 21:54:06,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:06,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717452364] [2023-11-06 21:54:06,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717452364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:06,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:06,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102692723] [2023-11-06 21:54:06,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:06,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:06,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:06,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:06,106 INFO L87 Difference]: Start difference. First operand 16045 states and 27444 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:06,912 INFO L93 Difference]: Finished difference Result 32343 states and 55333 transitions. [2023-11-06 21:54:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 782 [2023-11-06 21:54:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:06,961 INFO L225 Difference]: With dead ends: 32343 [2023-11-06 21:54:06,961 INFO L226 Difference]: Without dead ends: 16301 [2023-11-06 21:54:06,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 781 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:06,990 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 2 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:06,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1148 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:54:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16301 states. [2023-11-06 21:54:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16301 to 16173. [2023-11-06 21:54:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16173 states, 12700 states have (on average 1.6519685039370078) internal successors, (20980), 12756 states have internal predecessors, (20980), 3328 states have call successors, (3328), 144 states have call predecessors, (3328), 144 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16173 states to 16173 states and 27636 transitions. [2023-11-06 21:54:08,661 INFO L78 Accepts]: Start accepts. Automaton has 16173 states and 27636 transitions. Word has length 782 [2023-11-06 21:54:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:08,662 INFO L495 AbstractCegarLoop]: Abstraction has 16173 states and 27636 transitions. [2023-11-06 21:54:08,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 16173 states and 27636 transitions. [2023-11-06 21:54:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2023-11-06 21:54:08,695 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:08,696 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:08,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:08,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:08,906 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:08,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1399871396, now seen corresponding path program 1 times [2023-11-06 21:54:08,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:08,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812696806] [2023-11-06 21:54:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:08,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:09,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:09,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152980871] [2023-11-06 21:54:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:09,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:09,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:09,028 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:09,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 21:54:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:09,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:09,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 15355 proven. 177 refuted. 0 times theorem prover too weak. 14972 trivial. 0 not checked. [2023-11-06 21:54:10,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 192 proven. 177 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2023-11-06 21:54:10,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812696806] [2023-11-06 21:54:10,995 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152980871] [2023-11-06 21:54:10,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152980871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:10,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:10,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:54:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242107977] [2023-11-06 21:54:10,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:11,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:54:11,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:11,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:54:11,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:11,003 INFO L87 Difference]: Start difference. First operand 16173 states and 27636 transitions. Second operand has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) [2023-11-06 21:54:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:12,852 INFO L93 Difference]: Finished difference Result 32663 states and 55573 transitions. [2023-11-06 21:54:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:54:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) Word has length 782 [2023-11-06 21:54:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:12,904 INFO L225 Difference]: With dead ends: 32663 [2023-11-06 21:54:12,904 INFO L226 Difference]: Without dead ends: 16493 [2023-11-06 21:54:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1566 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:12,929 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 316 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:12,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1063 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:54:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2023-11-06 21:54:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 16237. [2023-11-06 21:54:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16237 states, 12748 states have (on average 1.639472858487606) internal successors, (20900), 12804 states have internal predecessors, (20900), 3328 states have call successors, (3328), 160 states have call predecessors, (3328), 160 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16237 states to 16237 states and 27556 transitions. [2023-11-06 21:54:14,375 INFO L78 Accepts]: Start accepts. Automaton has 16237 states and 27556 transitions. Word has length 782 [2023-11-06 21:54:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:14,377 INFO L495 AbstractCegarLoop]: Abstraction has 16237 states and 27556 transitions. [2023-11-06 21:54:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.5) internal successors, (252), 8 states have internal predecessors, (252), 3 states have call successors, (183), 2 states have call predecessors, (183), 4 states have return successors, (184), 3 states have call predecessors, (184), 3 states have call successors, (184) [2023-11-06 21:54:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16237 states and 27556 transitions. [2023-11-06 21:54:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:14,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:14,400 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:14,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:14,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 21:54:14,609 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:14,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash -257712770, now seen corresponding path program 1 times [2023-11-06 21:54:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:14,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189412708] [2023-11-06 21:54:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:14,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:14,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:14,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209828287] [2023-11-06 21:54:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:14,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:14,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:14,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:14,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 21:54:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:15,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:15,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 11469 proven. 90 refuted. 0 times theorem prover too weak. 18945 trivial. 0 not checked. [2023-11-06 21:54:15,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 279 proven. 90 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2023-11-06 21:54:16,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189412708] [2023-11-06 21:54:16,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209828287] [2023-11-06 21:54:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209828287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:16,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:16,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160069341] [2023-11-06 21:54:16,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:16,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:16,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:16,236 INFO L87 Difference]: Start difference. First operand 16237 states and 27556 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) [2023-11-06 21:54:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:18,006 INFO L93 Difference]: Finished difference Result 32775 states and 55405 transitions. [2023-11-06 21:54:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) Word has length 783 [2023-11-06 21:54:18,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:18,053 INFO L225 Difference]: With dead ends: 32775 [2023-11-06 21:54:18,053 INFO L226 Difference]: Without dead ends: 16541 [2023-11-06 21:54:18,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1558 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:18,081 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 636 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:18,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1071 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 21:54:18,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16541 states. [2023-11-06 21:54:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16541 to 16269. [2023-11-06 21:54:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16269 states, 12772 states have (on average 1.6182273723770748) internal successors, (20668), 12828 states have internal predecessors, (20668), 3328 states have call successors, (3328), 168 states have call predecessors, (3328), 168 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16269 states to 16269 states and 27324 transitions. [2023-11-06 21:54:19,899 INFO L78 Accepts]: Start accepts. Automaton has 16269 states and 27324 transitions. Word has length 783 [2023-11-06 21:54:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:19,900 INFO L495 AbstractCegarLoop]: Abstraction has 16269 states and 27324 transitions. [2023-11-06 21:54:19,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) [2023-11-06 21:54:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 16269 states and 27324 transitions. [2023-11-06 21:54:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:19,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:19,931 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:19,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:20,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:20,132 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:20,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:20,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2005091646, now seen corresponding path program 1 times [2023-11-06 21:54:20,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:20,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067980451] [2023-11-06 21:54:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:20,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:20,244 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:20,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454494638] [2023-11-06 21:54:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:20,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:20,246 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:20,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 21:54:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:20,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:54:21,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:54:21,108 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:21,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067980451] [2023-11-06 21:54:21,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:21,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454494638] [2023-11-06 21:54:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454494638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156464130] [2023-11-06 21:54:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:21,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:21,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:21,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:21,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:21,113 INFO L87 Difference]: Start difference. First operand 16269 states and 27324 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:22,641 INFO L93 Difference]: Finished difference Result 32567 states and 54669 transitions. [2023-11-06 21:54:22,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:54:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 783 [2023-11-06 21:54:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:22,684 INFO L225 Difference]: With dead ends: 32567 [2023-11-06 21:54:22,684 INFO L226 Difference]: Without dead ends: 16301 [2023-11-06 21:54:22,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 781 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 21:54:22,714 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 550 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:22,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 758 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:54:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16301 states. [2023-11-06 21:54:24,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16301 to 16301. [2023-11-06 21:54:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16301 states, 12796 states have (on average 1.6070647077211628) internal successors, (20564), 12852 states have internal predecessors, (20564), 3328 states have call successors, (3328), 176 states have call predecessors, (3328), 176 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16301 states to 16301 states and 27220 transitions. [2023-11-06 21:54:24,503 INFO L78 Accepts]: Start accepts. Automaton has 16301 states and 27220 transitions. Word has length 783 [2023-11-06 21:54:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 16301 states and 27220 transitions. [2023-11-06 21:54:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 16301 states and 27220 transitions. [2023-11-06 21:54:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:24,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:24,521 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:24,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 21:54:24,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:24,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -501500546, now seen corresponding path program 1 times [2023-11-06 21:54:24,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693170171] [2023-11-06 21:54:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:24,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:24,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442372563] [2023-11-06 21:54:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:24,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:24,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:24,829 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:24,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 21:54:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:25,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:25,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 3165 proven. 18 refuted. 0 times theorem prover too weak. 27321 trivial. 0 not checked. [2023-11-06 21:54:25,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 351 proven. 18 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2023-11-06 21:54:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693170171] [2023-11-06 21:54:26,274 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442372563] [2023-11-06 21:54:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442372563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:26,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:26,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 21:54:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100197963] [2023-11-06 21:54:26,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:26,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:26,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:54:26,279 INFO L87 Difference]: Start difference. First operand 16301 states and 27220 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-06 21:54:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:28,419 INFO L93 Difference]: Finished difference Result 32935 states and 54765 transitions. [2023-11-06 21:54:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 21:54:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) Word has length 783 [2023-11-06 21:54:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:28,473 INFO L225 Difference]: With dead ends: 32935 [2023-11-06 21:54:28,473 INFO L226 Difference]: Without dead ends: 16637 [2023-11-06 21:54:28,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1558 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:54:28,509 INFO L413 NwaCegarLoop]: 445 mSDtfsCounter, 363 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1083 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:28,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1083 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:54:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16637 states. [2023-11-06 21:54:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16637 to 16333. [2023-11-06 21:54:30,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16333 states, 12820 states have (on average 1.6009360374414976) internal successors, (20524), 12876 states have internal predecessors, (20524), 3328 states have call successors, (3328), 184 states have call predecessors, (3328), 184 states have return successors, (3328), 3272 states have call predecessors, (3328), 3328 states have call successors, (3328) [2023-11-06 21:54:30,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16333 states to 16333 states and 27180 transitions. [2023-11-06 21:54:30,370 INFO L78 Accepts]: Start accepts. Automaton has 16333 states and 27180 transitions. Word has length 783 [2023-11-06 21:54:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:30,371 INFO L495 AbstractCegarLoop]: Abstraction has 16333 states and 27180 transitions. [2023-11-06 21:54:30,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-06 21:54:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 16333 states and 27180 transitions. [2023-11-06 21:54:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:30,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:30,390 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:30,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 21:54:30,591 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:30,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2089848448, now seen corresponding path program 1 times [2023-11-06 21:54:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:30,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890324470] [2023-11-06 21:54:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:30,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441217464] [2023-11-06 21:54:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:30,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:30,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:30,682 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:30,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 21:54:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:31,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:54:31,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 14043 proven. 129 refuted. 0 times theorem prover too weak. 16332 trivial. 0 not checked. [2023-11-06 21:54:32,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890324470] [2023-11-06 21:54:34,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:34,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441217464] [2023-11-06 21:54:34,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441217464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:54:34,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:54:34,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-11-06 21:54:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315903674] [2023-11-06 21:54:34,667 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:34,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:54:34,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:34,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:54:34,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2023-11-06 21:54:34,670 INFO L87 Difference]: Start difference. First operand 16333 states and 27180 transitions. Second operand has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (124), 2 states have call predecessors, (124), 3 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-06 21:54:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:38,177 INFO L93 Difference]: Finished difference Result 36128 states and 59801 transitions. [2023-11-06 21:54:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 21:54:38,178 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (124), 2 states have call predecessors, (124), 3 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) Word has length 783 [2023-11-06 21:54:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:38,219 INFO L225 Difference]: With dead ends: 36128 [2023-11-06 21:54:38,219 INFO L226 Difference]: Without dead ends: 23846 [2023-11-06 21:54:38,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=120, Invalid=259, Unknown=1, NotChecked=0, Total=380 [2023-11-06 21:54:38,234 INFO L413 NwaCegarLoop]: 603 mSDtfsCounter, 996 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:38,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 2060 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 21:54:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23846 states. [2023-11-06 21:54:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23846 to 23393. [2023-11-06 21:54:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23393 states, 18385 states have (on average 1.5991841174870818) internal successors, (29401), 18474 states have internal predecessors, (29401), 4728 states have call successors, (4728), 279 states have call predecessors, (4728), 279 states have return successors, (4728), 4639 states have call predecessors, (4728), 4728 states have call successors, (4728) [2023-11-06 21:54:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23393 states to 23393 states and 38857 transitions. [2023-11-06 21:54:40,313 INFO L78 Accepts]: Start accepts. Automaton has 23393 states and 38857 transitions. Word has length 783 [2023-11-06 21:54:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:40,314 INFO L495 AbstractCegarLoop]: Abstraction has 23393 states and 38857 transitions. [2023-11-06 21:54:40,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 2 states have call successors, (124), 2 states have call predecessors, (124), 3 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-06 21:54:40,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23393 states and 38857 transitions. [2023-11-06 21:54:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:40,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:40,328 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:40,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:40,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 21:54:40,528 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:40,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:40,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1237768194, now seen corresponding path program 1 times [2023-11-06 21:54:40,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:40,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70793915] [2023-11-06 21:54:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:40,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:40,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584935546] [2023-11-06 21:54:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:40,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:40,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:40,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 21:54:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:41,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:54:41,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 14619 proven. 225 refuted. 0 times theorem prover too weak. 15660 trivial. 0 not checked. [2023-11-06 21:54:42,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:54:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 144 proven. 225 refuted. 0 times theorem prover too weak. 30135 trivial. 0 not checked. [2023-11-06 21:54:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70793915] [2023-11-06 21:54:42,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584935546] [2023-11-06 21:54:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584935546] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:54:42,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 21:54:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 21:54:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134145333] [2023-11-06 21:54:42,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 21:54:42,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:54:42,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:54:42,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:54:42,678 INFO L87 Difference]: Start difference. First operand 23393 states and 38857 transitions. Second operand has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 3 states have call successors, (199), 2 states have call predecessors, (199), 4 states have return successors, (200), 3 states have call predecessors, (200), 3 states have call successors, (200) [2023-11-06 21:54:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:44,590 INFO L93 Difference]: Finished difference Result 43899 states and 72586 transitions. [2023-11-06 21:54:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:54:44,591 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 3 states have call successors, (199), 2 states have call predecessors, (199), 4 states have return successors, (200), 3 states have call predecessors, (200), 3 states have call successors, (200) Word has length 783 [2023-11-06 21:54:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:44,632 INFO L225 Difference]: With dead ends: 43899 [2023-11-06 21:54:44,632 INFO L226 Difference]: Without dead ends: 20661 [2023-11-06 21:54:44,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1558 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 21:54:44,661 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 310 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:44,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1038 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 21:54:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2023-11-06 21:54:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 20285. [2023-11-06 21:54:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20285 states, 15885 states have (on average 1.5887315077116777) internal successors, (25237), 15958 states have internal predecessors, (25237), 4132 states have call successors, (4132), 267 states have call predecessors, (4132), 267 states have return successors, (4132), 4059 states have call predecessors, (4132), 4132 states have call successors, (4132) [2023-11-06 21:54:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20285 states to 20285 states and 33501 transitions. [2023-11-06 21:54:46,961 INFO L78 Accepts]: Start accepts. Automaton has 20285 states and 33501 transitions. Word has length 783 [2023-11-06 21:54:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:46,962 INFO L495 AbstractCegarLoop]: Abstraction has 20285 states and 33501 transitions. [2023-11-06 21:54:46,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.625) internal successors, (237), 8 states have internal predecessors, (237), 3 states have call successors, (199), 2 states have call predecessors, (199), 4 states have return successors, (200), 3 states have call predecessors, (200), 3 states have call successors, (200) [2023-11-06 21:54:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 20285 states and 33501 transitions. [2023-11-06 21:54:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:46,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:46,986 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:46,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:47,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 21:54:47,187 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:47,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:47,188 INFO L85 PathProgramCache]: Analyzing trace with hash -201870237, now seen corresponding path program 1 times [2023-11-06 21:54:47,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:47,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124775694] [2023-11-06 21:54:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:47,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:47,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271853121] [2023-11-06 21:54:47,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:47,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:47,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:47,297 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:47,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 21:54:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:48,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:48,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:54:48,159 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:48,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124775694] [2023-11-06 21:54:48,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:48,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271853121] [2023-11-06 21:54:48,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271853121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:48,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:48,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 21:54:48,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946873143] [2023-11-06 21:54:48,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:48,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:48,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:48,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:48,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:48,166 INFO L87 Difference]: Start difference. First operand 20285 states and 33501 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:54:52,327 INFO L93 Difference]: Finished difference Result 71917 states and 118532 transitions. [2023-11-06 21:54:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:54:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 783 [2023-11-06 21:54:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:54:52,427 INFO L225 Difference]: With dead ends: 71917 [2023-11-06 21:54:52,427 INFO L226 Difference]: Without dead ends: 51787 [2023-11-06 21:54:52,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 781 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 21:54:52,454 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 850 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:54:52,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 2187 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:54:52,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51787 states. [2023-11-06 21:54:56,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51787 to 37281. [2023-11-06 21:54:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37281 states, 29780 states have (on average 1.5947615849563466) internal successors, (47492), 29933 states have internal predecessors, (47492), 7072 states have call successors, (7072), 428 states have call predecessors, (7072), 428 states have return successors, (7072), 6919 states have call predecessors, (7072), 7072 states have call successors, (7072) [2023-11-06 21:54:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37281 states to 37281 states and 61636 transitions. [2023-11-06 21:54:56,400 INFO L78 Accepts]: Start accepts. Automaton has 37281 states and 61636 transitions. Word has length 783 [2023-11-06 21:54:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:54:56,401 INFO L495 AbstractCegarLoop]: Abstraction has 37281 states and 61636 transitions. [2023-11-06 21:54:56,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:54:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 37281 states and 61636 transitions. [2023-11-06 21:54:56,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-11-06 21:54:56,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:54:56,426 INFO L195 NwaCegarLoop]: trace histogram [124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:54:56,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 21:54:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:56,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:54:56,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:54:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 637163425, now seen corresponding path program 1 times [2023-11-06 21:54:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:54:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393536485] [2023-11-06 21:54:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:54:56,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 21:54:56,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083591956] [2023-11-06 21:54:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:54:56,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:54:56,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:54:56,723 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:54:56,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bee48e1-56bf-41b8-992b-41c4016e830a/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 21:54:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:54:57,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1846 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:54:57,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:54:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30504 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30504 trivial. 0 not checked. [2023-11-06 21:54:58,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:54:58,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:54:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393536485] [2023-11-06 21:54:58,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 21:54:58,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083591956] [2023-11-06 21:54:58,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083591956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:54:58,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:54:58,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:54:58,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399920115] [2023-11-06 21:54:58,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:54:58,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:54:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:54:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:54:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:54:58,721 INFO L87 Difference]: Start difference. First operand 37281 states and 61636 transitions. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) [2023-11-06 21:55:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:55:04,128 INFO L93 Difference]: Finished difference Result 96747 states and 159537 transitions. [2023-11-06 21:55:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:55:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 3 states have internal predecessors, (166), 1 states have call successors, (124), 1 states have call predecessors, (124), 1 states have return successors, (124), 1 states have call predecessors, (124), 1 states have call successors, (124) Word has length 783 [2023-11-06 21:55:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:55:04,260 INFO L225 Difference]: With dead ends: 96747 [2023-11-06 21:55:04,260 INFO L226 Difference]: Without dead ends: 59625 [2023-11-06 21:55:04,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:55:04,304 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 762 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:55:04,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 1719 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:55:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59625 states.