./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 c59a07a72114fa018dd9402a01bfcfdf8aa22d82b0ff93edb1d3b6cc15f90161 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:20:18,571 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:20:18,632 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:20:18,637 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:20:18,637 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:20:18,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:20:18,660 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:20:18,660 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:20:18,661 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:20:18,661 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:20:18,662 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:20:18,662 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:20:18,663 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:20:18,663 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:20:18,664 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:20:18,665 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:20:18,665 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:20:18,666 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:20:18,666 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:20:18,667 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:20:18,667 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:20:18,668 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:20:18,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:20:18,669 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:20:18,669 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:20:18,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:20:18,670 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:20:18,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:20:18,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:20:18,671 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:20:18,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:20:18,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:20:18,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:20:18,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:20:18,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:20:18,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:20:18,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:20:18,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:20:18,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:20:18,674 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:20:18,674 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:20:18,674 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:20:18,675 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_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c59a07a72114fa018dd9402a01bfcfdf8aa22d82b0ff93edb1d3b6cc15f90161 [2023-11-29 00:20:18,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:20:18,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:20:18,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:20:18,905 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:20:18,905 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:20:18,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i [2023-11-29 00:20:21,718 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:20:21,978 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:20:21,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i [2023-11-29 00:20:21,993 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/data/ba2d30318/58316ffc26a04690b3e5e06b14fee5bb/FLAG83c5c5e0d [2023-11-29 00:20:22,005 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/data/ba2d30318/58316ffc26a04690b3e5e06b14fee5bb [2023-11-29 00:20:22,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:20:22,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:20:22,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:20:22,012 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:20:22,016 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:20:22,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f36a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22, skipping insertion in model container [2023-11-29 00:20:22,017 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,077 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:20:22,204 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_bfd1678d-260c-4bf7-846b-7691f4029a97/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i[916,929] [2023-11-29 00:20:22,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:20:22,445 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:20:22,454 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_bfd1678d-260c-4bf7-846b-7691f4029a97/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-40.i[916,929] [2023-11-29 00:20:22,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:20:22,610 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:20:22,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22 WrapperNode [2023-11-29 00:20:22,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:20:22,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:20:22,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:20:22,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:20:22,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,646 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,738 INFO L138 Inliner]: procedures = 26, calls = 77, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 761 [2023-11-29 00:20:22,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:20:22,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:20:22,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:20:22,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:20:22,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,765 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,817 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 00:20:22,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,881 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:20:22,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:20:22,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:20:22,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:20:22,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (1/1) ... [2023-11-29 00:20:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:20:22,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:22,943 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:20:22,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:20:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:20:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:20:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:20:22,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:20:22,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:20:23,134 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:20:23,136 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:20:24,260 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:20:24,296 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:20:24,297 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:20:24,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:20:24 BoogieIcfgContainer [2023-11-29 00:20:24,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:20:24,300 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:20:24,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:20:24,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:20:24,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:20:22" (1/3) ... [2023-11-29 00:20:24,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67858a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:20:24, skipping insertion in model container [2023-11-29 00:20:24,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:20:22" (2/3) ... [2023-11-29 00:20:24,304 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67858a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:20:24, skipping insertion in model container [2023-11-29 00:20:24,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:20:24" (3/3) ... [2023-11-29 00:20:24,305 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-40.i [2023-11-29 00:20:24,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:20:24,320 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:20:24,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:20:24,373 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=LoopHeads, 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;@20b85126, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:20:24,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:20:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 219 states have (on average 1.5936073059360731) internal successors, (349), 220 states have internal predecessors, (349), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 00:20:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:24,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:24,407 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:24,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:24,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:24,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1387562844, now seen corresponding path program 1 times [2023-11-29 00:20:24,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:24,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240228367] [2023-11-29 00:20:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:24,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240228367] [2023-11-29 00:20:24,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:20:24,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556777427] [2023-11-29 00:20:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:24,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:24,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:24,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:24,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:20:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:25,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:20:25,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 7938 trivial. 0 not checked. [2023-11-29 00:20:25,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556777427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:25,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:20:25,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673761537] [2023-11-29 00:20:25,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:25,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:20:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:20:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:20:25,341 INFO L87 Difference]: Start difference. First operand has 286 states, 219 states have (on average 1.5936073059360731) internal successors, (349), 220 states have internal predecessors, (349), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Second operand has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-29 00:20:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:25,414 INFO L93 Difference]: Finished difference Result 569 states and 1016 transitions. [2023-11-29 00:20:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:20:25,417 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) Word has length 448 [2023-11-29 00:20:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:25,429 INFO L225 Difference]: With dead ends: 569 [2023-11-29 00:20:25,429 INFO L226 Difference]: Without dead ends: 284 [2023-11-29 00:20:25,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:20:25,439 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:25,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 469 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:20:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2023-11-29 00:20:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2023-11-29 00:20:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 218 states have internal predecessors, (344), 64 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 00:20:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 472 transitions. [2023-11-29 00:20:25,539 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 472 transitions. Word has length 448 [2023-11-29 00:20:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:25,540 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 472 transitions. [2023-11-29 00:20:25,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 66.5) internal successors, (133), 2 states have internal predecessors, (133), 2 states have call successors, (64), 2 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-29 00:20:25,541 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 472 transitions. [2023-11-29 00:20:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:25,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:25,553 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:25,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:20:25,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:20:25,754 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:25,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:25,755 INFO L85 PathProgramCache]: Analyzing trace with hash 582078692, now seen corresponding path program 1 times [2023-11-29 00:20:25,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:25,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412662219] [2023-11-29 00:20:25,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:25,867 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:25,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311402238] [2023-11-29 00:20:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:25,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:25,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:25,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:20:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:26,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:20:26,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:26,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:26,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:26,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412662219] [2023-11-29 00:20:26,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:26,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311402238] [2023-11-29 00:20:26,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311402238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:26,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:20:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019414787] [2023-11-29 00:20:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:26,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:20:26,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:26,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:20:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:20:26,508 INFO L87 Difference]: Start difference. First operand 284 states and 472 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:26,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:26,617 INFO L93 Difference]: Finished difference Result 793 states and 1318 transitions. [2023-11-29 00:20:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:20:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-11-29 00:20:26,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:26,625 INFO L225 Difference]: With dead ends: 793 [2023-11-29 00:20:26,626 INFO L226 Difference]: Without dead ends: 510 [2023-11-29 00:20:26,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:20:26,628 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 314 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:26,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1001 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:20:26,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2023-11-29 00:20:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 507. [2023-11-29 00:20:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 403 states have (on average 1.5930521091811414) internal successors, (642), 404 states have internal predecessors, (642), 101 states have call successors, (101), 2 states have call predecessors, (101), 2 states have return successors, (101), 100 states have call predecessors, (101), 101 states have call successors, (101) [2023-11-29 00:20:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 844 transitions. [2023-11-29 00:20:26,686 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 844 transitions. Word has length 448 [2023-11-29 00:20:26,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:26,688 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 844 transitions. [2023-11-29 00:20:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 844 transitions. [2023-11-29 00:20:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:26,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:26,694 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:26,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:20:26,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:26,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:26,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1421112354, now seen corresponding path program 1 times [2023-11-29 00:20:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:26,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069094273] [2023-11-29 00:20:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:26,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:26,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963064689] [2023-11-29 00:20:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:26,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:26,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:27,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:20:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:27,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:20:27,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:27,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069094273] [2023-11-29 00:20:27,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:27,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963064689] [2023-11-29 00:20:27,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963064689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:27,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:27,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:20:27,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648406669] [2023-11-29 00:20:27,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:27,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:20:27,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:20:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:27,489 INFO L87 Difference]: Start difference. First operand 507 states and 844 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:28,009 INFO L93 Difference]: Finished difference Result 1289 states and 2136 transitions. [2023-11-29 00:20:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:20:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-11-29 00:20:28,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:28,018 INFO L225 Difference]: With dead ends: 1289 [2023-11-29 00:20:28,018 INFO L226 Difference]: Without dead ends: 783 [2023-11-29 00:20:28,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:28,021 INFO L413 NwaCegarLoop]: 821 mSDtfsCounter, 831 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:28,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 1329 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:20:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2023-11-29 00:20:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 527. [2023-11-29 00:20:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 460 states have (on average 1.6565217391304348) internal successors, (762), 460 states have internal predecessors, (762), 64 states have call successors, (64), 2 states have call predecessors, (64), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 00:20:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 890 transitions. [2023-11-29 00:20:28,059 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 890 transitions. Word has length 448 [2023-11-29 00:20:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:28,060 INFO L495 AbstractCegarLoop]: Abstraction has 527 states and 890 transitions. [2023-11-29 00:20:28,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 890 transitions. [2023-11-29 00:20:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:28,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:28,066 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:28,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:20:28,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:28,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -185810334, now seen corresponding path program 1 times [2023-11-29 00:20:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:28,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898433501] [2023-11-29 00:20:28,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:28,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:28,347 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379847679] [2023-11-29 00:20:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:28,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:28,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:28,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:28,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:20:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:28,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:20:28,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:28,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898433501] [2023-11-29 00:20:28,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379847679] [2023-11-29 00:20:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379847679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:20:28,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033423536] [2023-11-29 00:20:28,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:28,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:20:28,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:20:28,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:28,843 INFO L87 Difference]: Start difference. First operand 527 states and 890 transitions. Second operand has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:29,952 INFO L93 Difference]: Finished difference Result 1765 states and 2933 transitions. [2023-11-29 00:20:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:20:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-11-29 00:20:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:29,963 INFO L225 Difference]: With dead ends: 1765 [2023-11-29 00:20:29,963 INFO L226 Difference]: Without dead ends: 1233 [2023-11-29 00:20:29,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:20:29,966 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 1935 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:29,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1935 Valid, 1982 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:20:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2023-11-29 00:20:30,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 543. [2023-11-29 00:20:30,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 476 states have (on average 1.638655462184874) internal successors, (780), 476 states have internal predecessors, (780), 64 states have call successors, (64), 2 states have call predecessors, (64), 2 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2023-11-29 00:20:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 908 transitions. [2023-11-29 00:20:30,039 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 908 transitions. Word has length 448 [2023-11-29 00:20:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 908 transitions. [2023-11-29 00:20:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.2) internal successors, (131), 5 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 908 transitions. [2023-11-29 00:20:30,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:30,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:30,045 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:30,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:20:30,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:30,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:30,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2108720862, now seen corresponding path program 1 times [2023-11-29 00:20:30,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:30,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318157807] [2023-11-29 00:20:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:30,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:30,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:30,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730846167] [2023-11-29 00:20:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:30,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:30,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:30,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:20:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:30,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:20:30,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:31,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:31,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:31,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318157807] [2023-11-29 00:20:31,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:31,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730846167] [2023-11-29 00:20:31,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730846167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:31,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:31,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:20:31,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078201385] [2023-11-29 00:20:31,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:20:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:31,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:20:31,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:31,218 INFO L87 Difference]: Start difference. First operand 543 states and 908 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:31,570 INFO L93 Difference]: Finished difference Result 1627 states and 2722 transitions. [2023-11-29 00:20:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:20:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 448 [2023-11-29 00:20:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:31,578 INFO L225 Difference]: With dead ends: 1627 [2023-11-29 00:20:31,578 INFO L226 Difference]: Without dead ends: 1085 [2023-11-29 00:20:31,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:31,580 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 359 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:31,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 1375 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:20:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2023-11-29 00:20:31,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1076. [2023-11-29 00:20:31,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 943 states have (on average 1.6362672322375398) internal successors, (1543), 943 states have internal predecessors, (1543), 128 states have call successors, (128), 4 states have call predecessors, (128), 4 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-29 00:20:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1799 transitions. [2023-11-29 00:20:31,658 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1799 transitions. Word has length 448 [2023-11-29 00:20:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:31,659 INFO L495 AbstractCegarLoop]: Abstraction has 1076 states and 1799 transitions. [2023-11-29 00:20:31,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 3 states have internal predecessors, (131), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:31,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1799 transitions. [2023-11-29 00:20:31,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2023-11-29 00:20:31,665 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:31,665 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:31,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:20:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:31,866 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:31,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1328312800, now seen corresponding path program 1 times [2023-11-29 00:20:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100355686] [2023-11-29 00:20:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:31,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:31,933 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:31,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709181211] [2023-11-29 00:20:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:31,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:31,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:31,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:31,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:20:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:32,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:20:32,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3913 proven. 114 refuted. 0 times theorem prover too weak. 4037 trivial. 0 not checked. [2023-11-29 00:20:32,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 75 proven. 114 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100355686] [2023-11-29 00:20:33,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709181211] [2023-11-29 00:20:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709181211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:33,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:33,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:20:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961304822] [2023-11-29 00:20:33,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:33,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:20:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:33,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:20:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:20:33,019 INFO L87 Difference]: Start difference. First operand 1076 states and 1799 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 00:20:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:33,463 INFO L93 Difference]: Finished difference Result 2147 states and 3571 transitions. [2023-11-29 00:20:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:20:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 448 [2023-11-29 00:20:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:33,470 INFO L225 Difference]: With dead ends: 2147 [2023-11-29 00:20:33,470 INFO L226 Difference]: Without dead ends: 1072 [2023-11-29 00:20:33,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 888 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:20:33,473 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 302 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:33,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 998 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:20:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-11-29 00:20:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1064. [2023-11-29 00:20:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 929 states have (on average 1.6027987082884823) internal successors, (1489), 929 states have internal predecessors, (1489), 128 states have call successors, (128), 6 states have call predecessors, (128), 6 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-29 00:20:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1745 transitions. [2023-11-29 00:20:33,532 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1745 transitions. Word has length 448 [2023-11-29 00:20:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:33,533 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1745 transitions. [2023-11-29 00:20:33,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 00:20:33,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1745 transitions. [2023-11-29 00:20:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2023-11-29 00:20:33,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:33,537 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:33,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:20:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:33,738 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1748249787, now seen corresponding path program 1 times [2023-11-29 00:20:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:33,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890658489] [2023-11-29 00:20:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:33,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:33,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222573389] [2023-11-29 00:20:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:33,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:33,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:33,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:33,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:20:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:34,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:20:34,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3985 proven. 78 refuted. 0 times theorem prover too weak. 4001 trivial. 0 not checked. [2023-11-29 00:20:34,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 111 proven. 78 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:34,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890658489] [2023-11-29 00:20:34,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:34,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222573389] [2023-11-29 00:20:34,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222573389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:34,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:34,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:20:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006117988] [2023-11-29 00:20:34,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:34,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:20:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:20:34,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:20:34,665 INFO L87 Difference]: Start difference. First operand 1064 states and 1745 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-29 00:20:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:35,119 INFO L93 Difference]: Finished difference Result 1933 states and 3147 transitions. [2023-11-29 00:20:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:20:35,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) Word has length 449 [2023-11-29 00:20:35,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:35,126 INFO L225 Difference]: With dead ends: 1933 [2023-11-29 00:20:35,126 INFO L226 Difference]: Without dead ends: 870 [2023-11-29 00:20:35,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 890 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:20:35,129 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 948 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:35,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 1010 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:20:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2023-11-29 00:20:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 860. [2023-11-29 00:20:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 723 states have (on average 1.5670816044260027) internal successors, (1133), 723 states have internal predecessors, (1133), 128 states have call successors, (128), 8 states have call predecessors, (128), 8 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-29 00:20:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1389 transitions. [2023-11-29 00:20:35,202 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1389 transitions. Word has length 449 [2023-11-29 00:20:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:35,203 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 1389 transitions. [2023-11-29 00:20:35,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 2 states have call successors, (90), 2 states have call predecessors, (90), 4 states have return successors, (91), 2 states have call predecessors, (91), 2 states have call successors, (91) [2023-11-29 00:20:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1389 transitions. [2023-11-29 00:20:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2023-11-29 00:20:35,208 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:35,208 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:35,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:20:35,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 00:20:35,409 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:35,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash -735425120, now seen corresponding path program 1 times [2023-11-29 00:20:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044047323] [2023-11-29 00:20:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:35,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383245344] [2023-11-29 00:20:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:35,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:35,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:35,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:35,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:20:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:35,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:20:35,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:35,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:35,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044047323] [2023-11-29 00:20:35,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383245344] [2023-11-29 00:20:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383245344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:35,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:20:35,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569661644] [2023-11-29 00:20:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:20:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:20:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:35,951 INFO L87 Difference]: Start difference. First operand 860 states and 1389 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:36,325 INFO L93 Difference]: Finished difference Result 1724 states and 2781 transitions. [2023-11-29 00:20:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:20:36,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 450 [2023-11-29 00:20:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:36,335 INFO L225 Difference]: With dead ends: 1724 [2023-11-29 00:20:36,335 INFO L226 Difference]: Without dead ends: 1289 [2023-11-29 00:20:36,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:36,337 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 653 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:36,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1172 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:20:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2023-11-29 00:20:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 854. [2023-11-29 00:20:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 717 states have (on average 1.5634588563458856) internal successors, (1121), 717 states have internal predecessors, (1121), 128 states have call successors, (128), 8 states have call predecessors, (128), 8 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-29 00:20:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1377 transitions. [2023-11-29 00:20:36,440 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1377 transitions. Word has length 450 [2023-11-29 00:20:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:36,441 INFO L495 AbstractCegarLoop]: Abstraction has 854 states and 1377 transitions. [2023-11-29 00:20:36,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1377 transitions. [2023-11-29 00:20:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 00:20:36,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:36,446 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:36,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:20:36,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:36,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:36,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash -134689340, now seen corresponding path program 1 times [2023-11-29 00:20:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:36,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806789832] [2023-11-29 00:20:36,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:36,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:36,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:36,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723712893] [2023-11-29 00:20:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:36,733 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:20:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:37,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:20:37,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:37,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:37,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:37,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806789832] [2023-11-29 00:20:37,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:37,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723712893] [2023-11-29 00:20:37,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723712893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:37,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:37,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:20:37,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939867269] [2023-11-29 00:20:37,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:20:37,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:20:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:37,167 INFO L87 Difference]: Start difference. First operand 854 states and 1377 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:37,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:37,780 INFO L93 Difference]: Finished difference Result 2566 states and 4110 transitions. [2023-11-29 00:20:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:20:37,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 451 [2023-11-29 00:20:37,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:37,792 INFO L225 Difference]: With dead ends: 2566 [2023-11-29 00:20:37,793 INFO L226 Difference]: Without dead ends: 1713 [2023-11-29 00:20:37,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:20:37,796 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 1359 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:37,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1359 Valid, 2344 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:20:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2023-11-29 00:20:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1687. [2023-11-29 00:20:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1346 states have (on average 1.5222882615156017) internal successors, (2049), 1346 states have internal predecessors, (2049), 320 states have call successors, (320), 20 states have call predecessors, (320), 20 states have return successors, (320), 320 states have call predecessors, (320), 320 states have call successors, (320) [2023-11-29 00:20:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2689 transitions. [2023-11-29 00:20:38,006 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2689 transitions. Word has length 451 [2023-11-29 00:20:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:38,007 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2689 transitions. [2023-11-29 00:20:38,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:38,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2689 transitions. [2023-11-29 00:20:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2023-11-29 00:20:38,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:38,012 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:38,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:20:38,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 00:20:38,213 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:38,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2013820286, now seen corresponding path program 1 times [2023-11-29 00:20:38,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:38,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492319873] [2023-11-29 00:20:38,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:38,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:38,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100549123] [2023-11-29 00:20:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:38,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:38,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:38,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:20:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:38,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:20:38,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3589 proven. 60 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2023-11-29 00:20:39,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 129 proven. 60 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:39,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492319873] [2023-11-29 00:20:39,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:39,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100549123] [2023-11-29 00:20:39,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100549123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:39,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:39,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 00:20:39,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603987921] [2023-11-29 00:20:39,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:39,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:20:39,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:20:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:20:39,601 INFO L87 Difference]: Start difference. First operand 1687 states and 2689 transitions. Second operand has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-11-29 00:20:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:41,321 INFO L93 Difference]: Finished difference Result 6019 states and 9576 transitions. [2023-11-29 00:20:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:20:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) Word has length 451 [2023-11-29 00:20:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:41,343 INFO L225 Difference]: With dead ends: 6019 [2023-11-29 00:20:41,343 INFO L226 Difference]: Without dead ends: 4456 [2023-11-29 00:20:41,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:20:41,348 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 2738 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 2277 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 895 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:41,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2738 Valid, 2277 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [895 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 00:20:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4456 states. [2023-11-29 00:20:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4456 to 4412. [2023-11-29 00:20:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 3606 states have (on average 1.5321686078757626) internal successors, (5525), 3610 states have internal predecessors, (5525), 748 states have call successors, (748), 57 states have call predecessors, (748), 57 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-29 00:20:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 7021 transitions. [2023-11-29 00:20:41,702 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 7021 transitions. Word has length 451 [2023-11-29 00:20:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:41,703 INFO L495 AbstractCegarLoop]: Abstraction has 4412 states and 7021 transitions. [2023-11-29 00:20:41,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.75) internal successors, (189), 12 states have internal predecessors, (189), 4 states have call successors, (128), 3 states have call predecessors, (128), 5 states have return successors, (128), 4 states have call predecessors, (128), 4 states have call successors, (128) [2023-11-29 00:20:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 7021 transitions. [2023-11-29 00:20:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 00:20:41,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:41,708 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:41,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:20:41,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:41,908 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:41,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:41,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1908882199, now seen corresponding path program 1 times [2023-11-29 00:20:41,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:41,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343347759] [2023-11-29 00:20:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:41,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:41,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361410679] [2023-11-29 00:20:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:41,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:41,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:41,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:41,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:20:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:42,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:20:42,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3892 proven. 183 refuted. 0 times theorem prover too weak. 3989 trivial. 0 not checked. [2023-11-29 00:20:43,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:43,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343347759] [2023-11-29 00:20:43,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:43,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361410679] [2023-11-29 00:20:43,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361410679] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:20:43,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:20:43,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14] total 17 [2023-11-29 00:20:43,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948628655] [2023-11-29 00:20:43,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:43,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:20:43,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:43,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:20:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:20:43,581 INFO L87 Difference]: Start difference. First operand 4412 states and 7021 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:44,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:44,545 INFO L93 Difference]: Finished difference Result 13043 states and 20694 transitions. [2023-11-29 00:20:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:20:44,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-11-29 00:20:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:44,598 INFO L225 Difference]: With dead ends: 13043 [2023-11-29 00:20:44,599 INFO L226 Difference]: Without dead ends: 8767 [2023-11-29 00:20:44,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:20:44,611 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 1432 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1432 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:44,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1432 Valid, 1078 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:20:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8767 states. [2023-11-29 00:20:45,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8767 to 5658. [2023-11-29 00:20:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 4839 states have (on average 1.5546600537301096) internal successors, (7523), 4843 states have internal predecessors, (7523), 748 states have call successors, (748), 70 states have call predecessors, (748), 70 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-29 00:20:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 9019 transitions. [2023-11-29 00:20:45,352 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 9019 transitions. Word has length 452 [2023-11-29 00:20:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:45,353 INFO L495 AbstractCegarLoop]: Abstraction has 5658 states and 9019 transitions. [2023-11-29 00:20:45,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:45,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 9019 transitions. [2023-11-29 00:20:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 00:20:45,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:45,362 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:45,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:20:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:45,563 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:45,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1492598759, now seen corresponding path program 1 times [2023-11-29 00:20:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:45,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081871285] [2023-11-29 00:20:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:45,624 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:45,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322001289] [2023-11-29 00:20:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:45,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:45,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:45,626 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:45,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:20:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:46,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:20:46,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3789 proven. 120 refuted. 0 times theorem prover too weak. 4155 trivial. 0 not checked. [2023-11-29 00:20:46,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081871285] [2023-11-29 00:20:46,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322001289] [2023-11-29 00:20:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322001289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:46,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:46,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 00:20:46,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119614830] [2023-11-29 00:20:46,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:46,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:20:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:20:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:20:46,781 INFO L87 Difference]: Start difference. First operand 5658 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-29 00:20:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:47,548 INFO L93 Difference]: Finished difference Result 11196 states and 17799 transitions. [2023-11-29 00:20:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:20:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) Word has length 452 [2023-11-29 00:20:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:47,573 INFO L225 Difference]: With dead ends: 11196 [2023-11-29 00:20:47,574 INFO L226 Difference]: Without dead ends: 5678 [2023-11-29 00:20:47,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 894 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:20:47,585 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 500 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:47,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1322 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:20:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5678 states. [2023-11-29 00:20:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5678 to 5626. [2023-11-29 00:20:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5626 states, 4794 states have (on average 1.5423445974134335) internal successors, (7394), 4798 states have internal predecessors, (7394), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-29 00:20:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5626 states to 5626 states and 8890 transitions. [2023-11-29 00:20:48,136 INFO L78 Accepts]: Start accepts. Automaton has 5626 states and 8890 transitions. Word has length 452 [2023-11-29 00:20:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:48,137 INFO L495 AbstractCegarLoop]: Abstraction has 5626 states and 8890 transitions. [2023-11-29 00:20:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 3 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 3 states have call predecessors, (105), 3 states have call successors, (105) [2023-11-29 00:20:48,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5626 states and 8890 transitions. [2023-11-29 00:20:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 00:20:48,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:48,144 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:48,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:20:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:48,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:48,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash -752151079, now seen corresponding path program 1 times [2023-11-29 00:20:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041355832] [2023-11-29 00:20:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:48,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:48,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129463430] [2023-11-29 00:20:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:48,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:48,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:48,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:48,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:20:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:48,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:20:48,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:48,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:48,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041355832] [2023-11-29 00:20:48,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:48,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129463430] [2023-11-29 00:20:48,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129463430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:48,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:48,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:20:48,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413924645] [2023-11-29 00:20:48,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:48,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:20:48,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:20:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:48,953 INFO L87 Difference]: Start difference. First operand 5626 states and 8890 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:49,813 INFO L93 Difference]: Finished difference Result 13585 states and 21497 transitions. [2023-11-29 00:20:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:20:49,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-11-29 00:20:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:49,828 INFO L225 Difference]: With dead ends: 13585 [2023-11-29 00:20:49,828 INFO L226 Difference]: Without dead ends: 8103 [2023-11-29 00:20:49,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:20:49,837 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1338 mSDsluCounter, 2021 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 2845 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:49,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 2845 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:20:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8103 states. [2023-11-29 00:20:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8103 to 5608. [2023-11-29 00:20:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5608 states, 4776 states have (on average 1.5435510887772195) internal successors, (7372), 4780 states have internal predecessors, (7372), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-29 00:20:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 8868 transitions. [2023-11-29 00:20:50,382 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 8868 transitions. Word has length 452 [2023-11-29 00:20:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:50,382 INFO L495 AbstractCegarLoop]: Abstraction has 5608 states and 8868 transitions. [2023-11-29 00:20:50,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 8868 transitions. [2023-11-29 00:20:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2023-11-29 00:20:50,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:50,390 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:50,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 00:20:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:50,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:50,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 572705115, now seen corresponding path program 1 times [2023-11-29 00:20:50,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:50,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620255119] [2023-11-29 00:20:50,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:50,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:50,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137423648] [2023-11-29 00:20:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:50,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:50,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:50,654 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:50,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:20:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:51,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:20:51,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:51,178 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:51,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620255119] [2023-11-29 00:20:51,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:51,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137423648] [2023-11-29 00:20:51,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137423648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:51,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:51,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:20:51,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114262511] [2023-11-29 00:20:51,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:20:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:20:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:51,181 INFO L87 Difference]: Start difference. First operand 5608 states and 8868 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:51,860 INFO L93 Difference]: Finished difference Result 12143 states and 19233 transitions. [2023-11-29 00:20:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:20:51,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 452 [2023-11-29 00:20:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:51,878 INFO L225 Difference]: With dead ends: 12143 [2023-11-29 00:20:51,878 INFO L226 Difference]: Without dead ends: 6349 [2023-11-29 00:20:51,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:51,889 INFO L413 NwaCegarLoop]: 721 mSDtfsCounter, 341 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 1760 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 [2023-11-29 00:20:51,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 1760 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:20:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6349 states. [2023-11-29 00:20:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6349 to 5604. [2023-11-29 00:20:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 4772 states have (on average 1.5431684828164292) internal successors, (7364), 4776 states have internal predecessors, (7364), 748 states have call successors, (748), 83 states have call predecessors, (748), 83 states have return successors, (748), 744 states have call predecessors, (748), 748 states have call successors, (748) [2023-11-29 00:20:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8860 transitions. [2023-11-29 00:20:52,402 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8860 transitions. Word has length 452 [2023-11-29 00:20:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:52,402 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8860 transitions. [2023-11-29 00:20:52,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:52,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8860 transitions. [2023-11-29 00:20:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:20:52,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:52,410 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:52,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:20:52,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:20:52,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:52,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash -822286797, now seen corresponding path program 1 times [2023-11-29 00:20:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091548742] [2023-11-29 00:20:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:52,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:52,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265024849] [2023-11-29 00:20:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:52,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:52,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:52,672 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:52,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:20:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:53,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:20:53,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 673 proven. 6 refuted. 0 times theorem prover too weak. 7385 trivial. 0 not checked. [2023-11-29 00:20:53,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 183 proven. 6 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091548742] [2023-11-29 00:20:53,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265024849] [2023-11-29 00:20:53,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265024849] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:53,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 00:20:53,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248820099] [2023-11-29 00:20:53,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:20:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:20:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:20:53,473 INFO L87 Difference]: Start difference. First operand 5604 states and 8860 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 00:20:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:54,571 INFO L93 Difference]: Finished difference Result 9668 states and 15215 transitions. [2023-11-29 00:20:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:20:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) Word has length 453 [2023-11-29 00:20:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:54,579 INFO L225 Difference]: With dead ends: 9668 [2023-11-29 00:20:54,579 INFO L226 Difference]: Without dead ends: 4208 [2023-11-29 00:20:54,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:20:54,587 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1371 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 1796 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:54,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 1796 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:20:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2023-11-29 00:20:54,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 4145. [2023-11-29 00:20:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 3496 states have (on average 1.5243135011441649) internal successors, (5329), 3499 states have internal predecessors, (5329), 577 states have call successors, (577), 71 states have call predecessors, (577), 71 states have return successors, (577), 574 states have call predecessors, (577), 577 states have call successors, (577) [2023-11-29 00:20:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 6483 transitions. [2023-11-29 00:20:54,959 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 6483 transitions. Word has length 453 [2023-11-29 00:20:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:54,959 INFO L495 AbstractCegarLoop]: Abstraction has 4145 states and 6483 transitions. [2023-11-29 00:20:54,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (66), 2 states have call predecessors, (66), 4 states have return successors, (67), 2 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-29 00:20:54,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 6483 transitions. [2023-11-29 00:20:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:20:54,965 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:54,965 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:54,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:20:55,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:20:55,166 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:55,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1152057399, now seen corresponding path program 1 times [2023-11-29 00:20:55,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:55,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182460124] [2023-11-29 00:20:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:55,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:55,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979325274] [2023-11-29 00:20:55,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:55,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:55,220 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:20:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:55,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:20:55,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:55,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:55,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182460124] [2023-11-29 00:20:55,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:55,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979325274] [2023-11-29 00:20:55,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979325274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:55,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:55,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:20:55,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405747175] [2023-11-29 00:20:55,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:55,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:20:55,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:55,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:20:55,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:20:55,812 INFO L87 Difference]: Start difference. First operand 4145 states and 6483 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:56,160 INFO L93 Difference]: Finished difference Result 6021 states and 9396 transitions. [2023-11-29 00:20:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:20:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:20:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:56,165 INFO L225 Difference]: With dead ends: 6021 [2023-11-29 00:20:56,165 INFO L226 Difference]: Without dead ends: 1859 [2023-11-29 00:20:56,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:20:56,170 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 339 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:56,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1237 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:20:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2023-11-29 00:20:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 972. [2023-11-29 00:20:56,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 779 states have (on average 1.4736842105263157) internal successors, (1148), 780 states have internal predecessors, (1148), 171 states have call successors, (171), 21 states have call predecessors, (171), 21 states have return successors, (171), 170 states have call predecessors, (171), 171 states have call successors, (171) [2023-11-29 00:20:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1490 transitions. [2023-11-29 00:20:56,268 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1490 transitions. Word has length 453 [2023-11-29 00:20:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:56,269 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1490 transitions. [2023-11-29 00:20:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1490 transitions. [2023-11-29 00:20:56,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:20:56,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:56,272 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:56,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:20:56,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:20:56,473 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:56,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:56,473 INFO L85 PathProgramCache]: Analyzing trace with hash 133318935, now seen corresponding path program 1 times [2023-11-29 00:20:56,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:56,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375906755] [2023-11-29 00:20:56,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:56,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:56,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:56,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115961295] [2023-11-29 00:20:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:56,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:56,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:56,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:56,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:20:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:57,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:20:57,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:20:57,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:20:57,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375906755] [2023-11-29 00:20:57,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115961295] [2023-11-29 00:20:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115961295] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:20:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:20:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:20:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715374817] [2023-11-29 00:20:57,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:20:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:20:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:20:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:20:57,521 INFO L87 Difference]: Start difference. First operand 972 states and 1490 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:20:58,564 INFO L93 Difference]: Finished difference Result 3959 states and 6047 transitions. [2023-11-29 00:20:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:20:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:20:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:20:58,571 INFO L225 Difference]: With dead ends: 3959 [2023-11-29 00:20:58,571 INFO L226 Difference]: Without dead ends: 2988 [2023-11-29 00:20:58,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:20:58,574 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 1178 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:20:58,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 1973 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:20:58,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2023-11-29 00:20:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1947. [2023-11-29 00:20:58,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1562 states have (on average 1.47247119078105) internal successors, (2300), 1564 states have internal predecessors, (2300), 342 states have call successors, (342), 42 states have call predecessors, (342), 42 states have return successors, (342), 340 states have call predecessors, (342), 342 states have call successors, (342) [2023-11-29 00:20:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2984 transitions. [2023-11-29 00:20:58,827 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2984 transitions. Word has length 453 [2023-11-29 00:20:58,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:20:58,828 INFO L495 AbstractCegarLoop]: Abstraction has 1947 states and 2984 transitions. [2023-11-29 00:20:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:20:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2984 transitions. [2023-11-29 00:20:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:20:58,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:20:58,833 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:20:58,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:20:59,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:20:59,034 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:20:59,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:20:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1829618395, now seen corresponding path program 1 times [2023-11-29 00:20:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:20:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835396023] [2023-11-29 00:20:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:20:59,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:20:59,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201656059] [2023-11-29 00:20:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:20:59,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:20:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:20:59,096 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:20:59,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:20:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:20:59,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 00:20:59,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:20:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3823 proven. 69 refuted. 0 times theorem prover too weak. 4172 trivial. 0 not checked. [2023-11-29 00:20:59,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:20:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 120 proven. 69 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:20:59,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:20:59,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835396023] [2023-11-29 00:20:59,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:20:59,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201656059] [2023-11-29 00:20:59,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201656059] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:20:59,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:20:59,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 00:20:59,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483312154] [2023-11-29 00:20:59,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:20:59,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:20:59,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:20:59,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:20:59,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:20:59,970 INFO L87 Difference]: Start difference. First operand 1947 states and 2984 transitions. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 00:21:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:00,697 INFO L93 Difference]: Finished difference Result 3651 states and 5491 transitions. [2023-11-29 00:21:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:21:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) Word has length 453 [2023-11-29 00:21:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:00,701 INFO L225 Difference]: With dead ends: 3651 [2023-11-29 00:21:00,701 INFO L226 Difference]: Without dead ends: 1705 [2023-11-29 00:21:00,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 912 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:21:00,705 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 1024 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:00,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 895 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:21:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2023-11-29 00:21:00,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1641. [2023-11-29 00:21:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1250 states have (on average 1.3984) internal successors, (1748), 1252 states have internal predecessors, (1748), 342 states have call successors, (342), 48 states have call predecessors, (342), 48 states have return successors, (342), 340 states have call predecessors, (342), 342 states have call successors, (342) [2023-11-29 00:21:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2432 transitions. [2023-11-29 00:21:00,934 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2432 transitions. Word has length 453 [2023-11-29 00:21:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:00,934 INFO L495 AbstractCegarLoop]: Abstraction has 1641 states and 2432 transitions. [2023-11-29 00:21:00,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 2 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 2 states have call predecessors, (88), 2 states have call successors, (88) [2023-11-29 00:21:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2432 transitions. [2023-11-29 00:21:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:21:00,937 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:00,937 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:00,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:21:01,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:21:01,138 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:01,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:01,139 INFO L85 PathProgramCache]: Analyzing trace with hash -219769447, now seen corresponding path program 1 times [2023-11-29 00:21:01,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:01,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629829039] [2023-11-29 00:21:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:01,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:01,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:01,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119487772] [2023-11-29 00:21:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:01,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:01,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:01,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:01,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:21:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:01,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 00:21:01,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 3824 proven. 414 refuted. 0 times theorem prover too weak. 3826 trivial. 0 not checked. [2023-11-29 00:21:04,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 69 proven. 120 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:21:04,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629829039] [2023-11-29 00:21:04,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119487772] [2023-11-29 00:21:04,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119487772] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:04,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:04,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2023-11-29 00:21:04,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612223893] [2023-11-29 00:21:04,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:04,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:21:04,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:04,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:21:04,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:21:04,758 INFO L87 Difference]: Start difference. First operand 1641 states and 2432 transitions. Second operand has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) [2023-11-29 00:21:14,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:14,444 INFO L93 Difference]: Finished difference Result 8934 states and 13527 transitions. [2023-11-29 00:21:14,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 00:21:14,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) Word has length 453 [2023-11-29 00:21:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:14,454 INFO L225 Difference]: With dead ends: 8934 [2023-11-29 00:21:14,454 INFO L226 Difference]: Without dead ends: 7294 [2023-11-29 00:21:14,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4478 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1940, Invalid=10492, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 00:21:14,461 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 5404 mSDsluCounter, 7929 mSDsCounter, 0 mSdLazyCounter, 5647 mSolverCounterSat, 833 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5407 SdHoareTripleChecker+Valid, 8609 SdHoareTripleChecker+Invalid, 6480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 833 IncrementalHoareTripleChecker+Valid, 5647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:14,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5407 Valid, 8609 Invalid, 6480 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [833 Valid, 5647 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 00:21:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2023-11-29 00:21:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 2264. [2023-11-29 00:21:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1795 states have (on average 1.426183844011142) internal successors, (2560), 1800 states have internal predecessors, (2560), 411 states have call successors, (411), 57 states have call predecessors, (411), 57 states have return successors, (411), 406 states have call predecessors, (411), 411 states have call successors, (411) [2023-11-29 00:21:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3382 transitions. [2023-11-29 00:21:14,857 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3382 transitions. Word has length 453 [2023-11-29 00:21:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:14,858 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3382 transitions. [2023-11-29 00:21:14,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.083333333333334) internal successors, (242), 23 states have internal predecessors, (242), 6 states have call successors, (128), 5 states have call predecessors, (128), 8 states have return successors, (128), 6 states have call predecessors, (128), 6 states have call successors, (128) [2023-11-29 00:21:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3382 transitions. [2023-11-29 00:21:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:21:14,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:14,861 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:14,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:21:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:15,062 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:15,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 734170711, now seen corresponding path program 1 times [2023-11-29 00:21:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:15,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028703333] [2023-11-29 00:21:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:15,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:15,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:15,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104521670] [2023-11-29 00:21:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:15,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:15,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:15,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:21:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:15,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:21:15,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:21:16,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028703333] [2023-11-29 00:21:16,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:16,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104521670] [2023-11-29 00:21:16,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104521670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:16,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:16,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:21:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486772618] [2023-11-29 00:21:16,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:21:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:21:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:21:16,066 INFO L87 Difference]: Start difference. First operand 2264 states and 3382 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:21:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:17,448 INFO L93 Difference]: Finished difference Result 5558 states and 8256 transitions. [2023-11-29 00:21:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:21:17,449 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:21:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:17,454 INFO L225 Difference]: With dead ends: 5558 [2023-11-29 00:21:17,454 INFO L226 Difference]: Without dead ends: 3295 [2023-11-29 00:21:17,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:21:17,457 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 1227 mSDsluCounter, 1706 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2493 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:17,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2493 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:21:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2023-11-29 00:21:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 2264. [2023-11-29 00:21:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 1795 states have (on average 1.426183844011142) internal successors, (2560), 1800 states have internal predecessors, (2560), 411 states have call successors, (411), 57 states have call predecessors, (411), 57 states have return successors, (411), 406 states have call predecessors, (411), 411 states have call successors, (411) [2023-11-29 00:21:17,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 3382 transitions. [2023-11-29 00:21:17,808 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 3382 transitions. Word has length 453 [2023-11-29 00:21:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:17,808 INFO L495 AbstractCegarLoop]: Abstraction has 2264 states and 3382 transitions. [2023-11-29 00:21:17,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 6 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:21:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 3382 transitions. [2023-11-29 00:21:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:21:17,811 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:17,811 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:21:17,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:21:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:18,012 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:18,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash -451080937, now seen corresponding path program 1 times [2023-11-29 00:21:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637287371] [2023-11-29 00:21:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:18,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:18,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:18,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826157603] [2023-11-29 00:21:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:18,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:18,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:18,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:18,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:21:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:18,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 00:21:18,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4371 proven. 258 refuted. 0 times theorem prover too weak. 3435 trivial. 0 not checked. [2023-11-29 00:21:20,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:21:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637287371] [2023-11-29 00:21:25,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:25,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826157603] [2023-11-29 00:21:25,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826157603] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:21:25,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:21:25,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [17] total 34 [2023-11-29 00:21:25,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321705517] [2023-11-29 00:21:25,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:25,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:21:25,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:21:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:21:25,166 INFO L87 Difference]: Start difference. First operand 2264 states and 3382 transitions. Second operand has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 2 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-29 00:22:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:56,029 INFO L93 Difference]: Finished difference Result 27610 states and 42318 transitions. [2023-11-29 00:22:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-11-29 00:22:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 2 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 453 [2023-11-29 00:22:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:56,052 INFO L225 Difference]: With dead ends: 27610 [2023-11-29 00:22:56,053 INFO L226 Difference]: Without dead ends: 25347 [2023-11-29 00:22:56,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 877 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13527 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=4819, Invalid=28487, Unknown=0, NotChecked=0, Total=33306 [2023-11-29 00:22:56,068 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 13181 mSDsluCounter, 11031 mSDsCounter, 0 mSdLazyCounter, 7444 mSolverCounterSat, 1707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13181 SdHoareTripleChecker+Valid, 11716 SdHoareTripleChecker+Invalid, 9151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1707 IncrementalHoareTripleChecker+Valid, 7444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:56,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13181 Valid, 11716 Invalid, 9151 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1707 Valid, 7444 Invalid, 0 Unknown, 0 Unchecked, 43.6s Time] [2023-11-29 00:22:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25347 states. [2023-11-29 00:22:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25347 to 3865. [2023-11-29 00:22:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3865 states, 3120 states have (on average 1.4282051282051282) internal successors, (4456), 3134 states have internal predecessors, (4456), 654 states have call successors, (654), 90 states have call predecessors, (654), 90 states have return successors, (654), 640 states have call predecessors, (654), 654 states have call successors, (654) [2023-11-29 00:22:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3865 states to 3865 states and 5764 transitions. [2023-11-29 00:22:56,739 INFO L78 Accepts]: Start accepts. Automaton has 3865 states and 5764 transitions. Word has length 453 [2023-11-29 00:22:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:56,739 INFO L495 AbstractCegarLoop]: Abstraction has 3865 states and 5764 transitions. [2023-11-29 00:22:56,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.555555555555555) internal successors, (136), 18 states have internal predecessors, (136), 2 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-11-29 00:22:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3865 states and 5764 transitions. [2023-11-29 00:22:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:22:56,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:56,743 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:22:56,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:22:56,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:22:56,943 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:56,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 578278361, now seen corresponding path program 1 times [2023-11-29 00:22:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:56,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481780396] [2023-11-29 00:22:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:56,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:56,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821460307] [2023-11-29 00:22:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:56,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:56,995 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:56,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:22:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:57,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:22:57,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 2588 proven. 300 refuted. 0 times theorem prover too weak. 5176 trivial. 0 not checked. [2023-11-29 00:22:58,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 36 proven. 153 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:22:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481780396] [2023-11-29 00:22:58,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:58,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821460307] [2023-11-29 00:22:58,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821460307] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:22:58,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:22:58,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2023-11-29 00:22:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113398286] [2023-11-29 00:22:58,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:22:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:22:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:22:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:22:58,996 INFO L87 Difference]: Start difference. First operand 3865 states and 5764 transitions. Second operand has 15 states, 15 states have (on average 16.4) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2023-11-29 00:23:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:02,923 INFO L93 Difference]: Finished difference Result 12279 states and 18063 transitions. [2023-11-29 00:23:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:23:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 16.4) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) Word has length 453 [2023-11-29 00:23:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:02,934 INFO L225 Difference]: With dead ends: 12279 [2023-11-29 00:23:02,934 INFO L226 Difference]: Without dead ends: 8415 [2023-11-29 00:23:02,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=669, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:23:02,938 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 1503 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 3390 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:02,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1516 Valid, 3390 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 00:23:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2023-11-29 00:23:03,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 5308. [2023-11-29 00:23:03,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5308 states, 4527 states have (on average 1.4521758338855755) internal successors, (6574), 4541 states have internal predecessors, (6574), 654 states have call successors, (654), 126 states have call predecessors, (654), 126 states have return successors, (654), 640 states have call predecessors, (654), 654 states have call successors, (654) [2023-11-29 00:23:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5308 states to 5308 states and 7882 transitions. [2023-11-29 00:23:03,635 INFO L78 Accepts]: Start accepts. Automaton has 5308 states and 7882 transitions. Word has length 453 [2023-11-29 00:23:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:03,635 INFO L495 AbstractCegarLoop]: Abstraction has 5308 states and 7882 transitions. [2023-11-29 00:23:03,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.4) internal successors, (246), 14 states have internal predecessors, (246), 4 states have call successors, (115), 3 states have call predecessors, (115), 5 states have return successors, (116), 4 states have call predecessors, (116), 4 states have call successors, (116) [2023-11-29 00:23:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5308 states and 7882 transitions. [2023-11-29 00:23:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:23:03,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:03,639 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:03,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:23:03,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:23:03,840 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:03,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash -804169319, now seen corresponding path program 1 times [2023-11-29 00:23:03,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:03,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237226223] [2023-11-29 00:23:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:03,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:03,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:03,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574351437] [2023-11-29 00:23:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:03,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:03,890 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:03,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:23:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:04,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 00:23:04,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:23:04,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:23:04,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:04,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237226223] [2023-11-29 00:23:04,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:04,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574351437] [2023-11-29 00:23:04,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574351437] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:23:04,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:23:04,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:23:04,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288863930] [2023-11-29 00:23:04,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:04,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:23:04,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:23:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:23:04,700 INFO L87 Difference]: Start difference. First operand 5308 states and 7882 transitions. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:23:11,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:11,549 INFO L93 Difference]: Finished difference Result 26054 states and 38371 transitions. [2023-11-29 00:23:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:23:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:23:11,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:11,573 INFO L225 Difference]: With dead ends: 26054 [2023-11-29 00:23:11,573 INFO L226 Difference]: Without dead ends: 20747 [2023-11-29 00:23:11,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:23:11,579 INFO L413 NwaCegarLoop]: 1141 mSDtfsCounter, 2489 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 4797 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:11,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2489 Valid, 4797 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 00:23:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2023-11-29 00:23:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 9723. [2023-11-29 00:23:12,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 8434 states have (on average 1.4657339340763575) internal successors, (12362), 8459 states have internal predecessors, (12362), 1087 states have call successors, (1087), 201 states have call predecessors, (1087), 201 states have return successors, (1087), 1062 states have call predecessors, (1087), 1087 states have call successors, (1087) [2023-11-29 00:23:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 14536 transitions. [2023-11-29 00:23:12,910 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 14536 transitions. Word has length 453 [2023-11-29 00:23:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:12,911 INFO L495 AbstractCegarLoop]: Abstraction has 9723 states and 14536 transitions. [2023-11-29 00:23:12,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:23:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 14536 transitions. [2023-11-29 00:23:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:23:12,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:12,919 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:12,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:23:13,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:23:13,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:13,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:13,120 INFO L85 PathProgramCache]: Analyzing trace with hash -249257003, now seen corresponding path program 1 times [2023-11-29 00:23:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:13,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548127625] [2023-11-29 00:23:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:13,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:13,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:13,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609935603] [2023-11-29 00:23:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:13,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:13,172 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:13,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:23:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:13,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 1126 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:23:13,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4266 proven. 264 refuted. 0 times theorem prover too weak. 3534 trivial. 0 not checked. [2023-11-29 00:23:14,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 105 proven. 84 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:23:15,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548127625] [2023-11-29 00:23:15,655 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609935603] [2023-11-29 00:23:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609935603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:15,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:23:15,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-11-29 00:23:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056583952] [2023-11-29 00:23:15,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:15,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:23:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:15,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:23:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:23:15,659 INFO L87 Difference]: Start difference. First operand 9723 states and 14536 transitions. Second operand has 25 states, 25 states have (on average 10.28) internal successors, (257), 25 states have internal predecessors, (257), 4 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-29 00:23:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:44,283 INFO L93 Difference]: Finished difference Result 55357 states and 81265 transitions. [2023-11-29 00:23:44,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-11-29 00:23:44,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 10.28) internal successors, (257), 25 states have internal predecessors, (257), 4 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) Word has length 453 [2023-11-29 00:23:44,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:44,331 INFO L225 Difference]: With dead ends: 55357 [2023-11-29 00:23:44,331 INFO L226 Difference]: Without dead ends: 45733 [2023-11-29 00:23:44,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9920 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4221, Invalid=21219, Unknown=0, NotChecked=0, Total=25440 [2023-11-29 00:23:44,347 INFO L413 NwaCegarLoop]: 899 mSDtfsCounter, 3524 mSDsluCounter, 7858 mSDsCounter, 0 mSdLazyCounter, 8280 mSolverCounterSat, 1399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 8757 SdHoareTripleChecker+Invalid, 9679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1399 IncrementalHoareTripleChecker+Valid, 8280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:44,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 8757 Invalid, 9679 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1399 Valid, 8280 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2023-11-29 00:23:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45733 states. [2023-11-29 00:23:46,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45733 to 10182. [2023-11-29 00:23:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 8822 states have (on average 1.4559056903196554) internal successors, (12844), 8847 states have internal predecessors, (12844), 1085 states have call successors, (1085), 274 states have call predecessors, (1085), 274 states have return successors, (1085), 1060 states have call predecessors, (1085), 1085 states have call successors, (1085) [2023-11-29 00:23:46,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 15014 transitions. [2023-11-29 00:23:46,533 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 15014 transitions. Word has length 453 [2023-11-29 00:23:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:46,533 INFO L495 AbstractCegarLoop]: Abstraction has 10182 states and 15014 transitions. [2023-11-29 00:23:46,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.28) internal successors, (257), 25 states have internal predecessors, (257), 4 states have call successors, (125), 3 states have call predecessors, (125), 6 states have return successors, (126), 4 states have call predecessors, (126), 4 states have call successors, (126) [2023-11-29 00:23:46,533 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 15014 transitions. [2023-11-29 00:23:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:23:46,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:46,539 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:46,546 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:23:46,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:23:46,739 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:46,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:46,740 INFO L85 PathProgramCache]: Analyzing trace with hash 228191317, now seen corresponding path program 1 times [2023-11-29 00:23:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:46,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024118663] [2023-11-29 00:23:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:46,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:46,785 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685692071] [2023-11-29 00:23:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:46,786 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:46,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:23:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:47,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:23:47,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:23:47,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:23:47,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024118663] [2023-11-29 00:23:47,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:47,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685692071] [2023-11-29 00:23:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685692071] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:23:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:23:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:23:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622197748] [2023-11-29 00:23:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:47,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:23:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:23:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:23:47,577 INFO L87 Difference]: Start difference. First operand 10182 states and 15014 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:23:50,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:50,945 INFO L93 Difference]: Finished difference Result 29810 states and 43943 transitions. [2023-11-29 00:23:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:23:50,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:23:50,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:50,965 INFO L225 Difference]: With dead ends: 29810 [2023-11-29 00:23:50,966 INFO L226 Difference]: Without dead ends: 19728 [2023-11-29 00:23:50,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:23:50,974 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 331 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 1105 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:23:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19728 states. [2023-11-29 00:23:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19728 to 19726. [2023-11-29 00:23:54,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19726 states, 17052 states have (on average 1.4525568848228947) internal successors, (24769), 17101 states have internal predecessors, (24769), 2135 states have call successors, (2135), 538 states have call predecessors, (2135), 538 states have return successors, (2135), 2086 states have call predecessors, (2135), 2135 states have call successors, (2135) [2023-11-29 00:23:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19726 states to 19726 states and 29039 transitions. [2023-11-29 00:23:54,652 INFO L78 Accepts]: Start accepts. Automaton has 19726 states and 29039 transitions. Word has length 453 [2023-11-29 00:23:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:54,652 INFO L495 AbstractCegarLoop]: Abstraction has 19726 states and 29039 transitions. [2023-11-29 00:23:54,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 3 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:23:54,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19726 states and 29039 transitions. [2023-11-29 00:23:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:23:54,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:54,660 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:23:54,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:23:54,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:54,861 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:54,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 430015251, now seen corresponding path program 1 times [2023-11-29 00:23:54,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:54,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160628542] [2023-11-29 00:23:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:54,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128492884] [2023-11-29 00:23:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:54,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:54,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:54,907 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:54,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:23:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:55,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-29 00:23:55,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4041 proven. 462 refuted. 0 times theorem prover too weak. 3561 trivial. 0 not checked. [2023-11-29 00:24:08,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:24:21,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:21,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160628542] [2023-11-29 00:24:21,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:21,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128492884] [2023-11-29 00:24:21,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128492884] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:21,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:21,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [22] total 35 [2023-11-29 00:24:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001695158] [2023-11-29 00:24:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:21,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:24:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:24:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:24:21,158 INFO L87 Difference]: Start difference. First operand 19726 states and 29039 transitions. Second operand has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:25:09,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:09,610 INFO L93 Difference]: Finished difference Result 123299 states and 186254 transitions. [2023-11-29 00:25:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-11-29 00:25:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:25:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:09,729 INFO L225 Difference]: With dead ends: 123299 [2023-11-29 00:25:09,729 INFO L226 Difference]: Without dead ends: 108486 [2023-11-29 00:25:09,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 883 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1867, Invalid=9263, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 00:25:09,754 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 3663 mSDsluCounter, 7072 mSDsCounter, 0 mSdLazyCounter, 4609 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3663 SdHoareTripleChecker+Valid, 7918 SdHoareTripleChecker+Invalid, 4721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:09,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3663 Valid, 7918 Invalid, 4721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4609 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2023-11-29 00:25:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108486 states. [2023-11-29 00:25:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108486 to 26977. [2023-11-29 00:25:16,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26977 states, 22574 states have (on average 1.4211039248693187) internal successors, (32080), 22677 states have internal predecessors, (32080), 3497 states have call successors, (3497), 905 states have call predecessors, (3497), 905 states have return successors, (3497), 3394 states have call predecessors, (3497), 3497 states have call successors, (3497) [2023-11-29 00:25:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26977 states to 26977 states and 39074 transitions. [2023-11-29 00:25:16,235 INFO L78 Accepts]: Start accepts. Automaton has 26977 states and 39074 transitions. Word has length 453 [2023-11-29 00:25:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:16,235 INFO L495 AbstractCegarLoop]: Abstraction has 26977 states and 39074 transitions. [2023-11-29 00:25:16,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.714285714285714) internal successors, (136), 14 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:25:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26977 states and 39074 transitions. [2023-11-29 00:25:16,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-29 00:25:16,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:16,245 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:25:16,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:25:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:25:16,446 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:16,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash 35648465, now seen corresponding path program 1 times [2023-11-29 00:25:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:16,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985761794] [2023-11-29 00:25:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:16,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:16,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:16,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2069436185] [2023-11-29 00:25:16,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:16,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:16,489 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:16,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:25:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:17,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:25:17,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:25:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4209 proven. 285 refuted. 0 times theorem prover too weak. 3570 trivial. 0 not checked. [2023-11-29 00:25:23,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:27:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-11-29 00:27:27,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:27:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985761794] [2023-11-29 00:27:27,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:27:27,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069436185] [2023-11-29 00:27:27,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069436185] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:27:27,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:27:27,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [18] total 26 [2023-11-29 00:27:27,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216668257] [2023-11-29 00:27:27,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:27:27,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:27:27,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:27:27,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:27:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:27:27,660 INFO L87 Difference]: Start difference. First operand 26977 states and 39074 transitions. Second operand has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:27:37,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:27:40,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:02,665 WARN L293 SmtUtils]: Spent 10.34s on a formula simplification that was a NOOP. DAG size: 882 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:28:23,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:27,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:28:43,573 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 881 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:29:10,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:04,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-29 00:30:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:30:18,754 INFO L93 Difference]: Finished difference Result 101871 states and 151961 transitions. [2023-11-29 00:30:18,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 00:30:18,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) Word has length 453 [2023-11-29 00:30:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:30:18,847 INFO L225 Difference]: With dead ends: 101871 [2023-11-29 00:30:18,847 INFO L226 Difference]: Without dead ends: 74998 [2023-11-29 00:30:18,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 916 GetRequests, 881 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:30:18,877 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 1113 mSDsluCounter, 3228 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:30:18,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 4027 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1660 Invalid, 3 Unknown, 0 Unchecked, 101.1s Time] [2023-11-29 00:30:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74998 states. [2023-11-29 00:30:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74998 to 24088. [2023-11-29 00:30:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24088 states, 20441 states have (on average 1.4271806663079105) internal successors, (29173), 20520 states have internal predecessors, (29173), 2897 states have call successors, (2897), 749 states have call predecessors, (2897), 749 states have return successors, (2897), 2818 states have call predecessors, (2897), 2897 states have call successors, (2897) [2023-11-29 00:30:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24088 states to 24088 states and 34967 transitions. [2023-11-29 00:30:32,518 INFO L78 Accepts]: Start accepts. Automaton has 24088 states and 34967 transitions. Word has length 453 [2023-11-29 00:30:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:30:32,518 INFO L495 AbstractCegarLoop]: Abstraction has 24088 states and 34967 transitions. [2023-11-29 00:30:32,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.11111111111111) internal successors, (136), 9 states have internal predecessors, (136), 1 states have call successors, (64), 1 states have call predecessors, (64), 1 states have return successors, (64), 1 states have call predecessors, (64), 1 states have call successors, (64) [2023-11-29 00:30:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24088 states and 34967 transitions. [2023-11-29 00:30:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 00:30:32,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:30:32,528 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:30:32,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:30:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:30:32,729 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:30:32,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:30:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1769619426, now seen corresponding path program 1 times [2023-11-29 00:30:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:30:32,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499427559] [2023-11-29 00:30:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:30:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:30:32,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:30:32,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609103111] [2023-11-29 00:30:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:30:32,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:30:32,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:30:32,788 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:30:32,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:30:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:30:33,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:30:33,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:30:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 2763 proven. 39 refuted. 0 times theorem prover too weak. 5262 trivial. 0 not checked. [2023-11-29 00:30:33,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:30:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 150 proven. 39 refuted. 0 times theorem prover too weak. 7875 trivial. 0 not checked. [2023-11-29 00:30:33,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:30:33,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499427559] [2023-11-29 00:30:33,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:30:33,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609103111] [2023-11-29 00:30:33,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609103111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:30:33,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:30:33,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 00:30:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893600452] [2023-11-29 00:30:33,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:30:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:30:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:30:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:30:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:30:33,864 INFO L87 Difference]: Start difference. First operand 24088 states and 34967 transitions. Second operand has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-29 00:31:22,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:31:22,229 INFO L93 Difference]: Finished difference Result 89227 states and 130224 transitions. [2023-11-29 00:31:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:31:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) Word has length 454 [2023-11-29 00:31:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:31:22,324 INFO L225 Difference]: With dead ends: 89227 [2023-11-29 00:31:22,325 INFO L226 Difference]: Without dead ends: 65243 [2023-11-29 00:31:22,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:31:22,349 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 1369 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 1987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:31:22,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 2482 Invalid, 1987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:31:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65243 states. [2023-11-29 00:31:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65243 to 49417. [2023-11-29 00:31:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49417 states, 43406 states have (on average 1.4419665484034465) internal successors, (62590), 43575 states have internal predecessors, (62590), 4787 states have call successors, (4787), 1223 states have call predecessors, (4787), 1223 states have return successors, (4787), 4618 states have call predecessors, (4787), 4787 states have call successors, (4787) [2023-11-29 00:31:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49417 states to 49417 states and 72164 transitions. [2023-11-29 00:31:48,617 INFO L78 Accepts]: Start accepts. Automaton has 49417 states and 72164 transitions. Word has length 454 [2023-11-29 00:31:48,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:31:48,618 INFO L495 AbstractCegarLoop]: Abstraction has 49417 states and 72164 transitions. [2023-11-29 00:31:48,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.416666666666668) internal successors, (197), 12 states have internal predecessors, (197), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-29 00:31:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 49417 states and 72164 transitions. [2023-11-29 00:31:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2023-11-29 00:31:48,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:31:48,643 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:31:48,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:31:48,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:31:48,845 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:31:48,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:31:48,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1754100708, now seen corresponding path program 1 times [2023-11-29 00:31:48,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:31:48,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362407057] [2023-11-29 00:31:48,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:31:48,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:31:48,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:31:48,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728742450] [2023-11-29 00:31:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:31:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:31:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:31:48,898 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:31:48,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfd1678d-260c-4bf7-846b-7691f4029a97/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:32:19,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:32:19,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-29 00:32:19,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:32:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4743 proven. 966 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2023-11-29 00:32:35,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:32:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 171 proven. 204 refuted. 0 times theorem prover too weak. 7689 trivial. 0 not checked. [2023-11-29 00:32:51,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:32:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362407057] [2023-11-29 00:32:51,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:32:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728742450] [2023-11-29 00:32:51,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728742450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:32:51,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:32:51,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21] total 52 [2023-11-29 00:32:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803601040] [2023-11-29 00:32:51,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:32:51,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 00:32:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:32:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 00:32:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 00:32:51,692 INFO L87 Difference]: Start difference. First operand 49417 states and 72164 transitions. Second operand has 52 states, 52 states have (on average 5.461538461538462) internal successors, (284), 50 states have internal predecessors, (284), 10 states have call successors, (128), 8 states have call predecessors, (128), 13 states have return successors, (128), 10 states have call predecessors, (128), 10 states have call successors, (128) [2023-11-29 00:33:08,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:13,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:17,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:30,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:35,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:40,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:49,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:54,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:33:56,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:01,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:02,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 00:34:05,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 00:34:12,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []