./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/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 5db290f428815e90a4f018b6e59020b3b572c51fa983142ee856b69fd7fa99fb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:48:20,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:48:20,619 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:48:20,624 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:48:20,625 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:48:20,657 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:48:20,657 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:48:20,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:48:20,658 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:48:20,659 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:48:20,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:48:20,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:48:20,661 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:48:20,661 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:48:20,662 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:48:20,662 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:48:20,663 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:48:20,673 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:48:20,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:48:20,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:48:20,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:48:20,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:48:20,676 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:48:20,676 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:48:20,677 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:48:20,677 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:48:20,677 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:48:20,678 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:48:20,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:48:20,679 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:48:20,679 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:48:20,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:20,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:48:20,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:48:20,680 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:48:20,680 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:48:20,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:48:20,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:48:20,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:48:20,681 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:48:20,681 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:48:20,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:48:20,682 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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5db290f428815e90a4f018b6e59020b3b572c51fa983142ee856b69fd7fa99fb [2023-11-29 00:48:20,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:48:20,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:48:20,921 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:48:20,922 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:48:20,930 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:48:20,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-29 00:48:23,611 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:48:23,845 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:48:23,846 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-29 00:48:23,861 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/87aa77fa2/a13f4a33d4b34344a706542d88e7336f/FLAGcf7021958 [2023-11-29 00:48:23,876 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/data/87aa77fa2/a13f4a33d4b34344a706542d88e7336f [2023-11-29 00:48:23,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:48:23,887 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:48:23,888 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:23,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:48:23,892 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:48:23,893 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:23" (1/1) ... [2023-11-29 00:48:23,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e52c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:23, skipping insertion in model container [2023-11-29 00:48:23,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:48:23" (1/1) ... [2023-11-29 00:48:23,945 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:48:24,070 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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i[916,929] [2023-11-29 00:48:24,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:24,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:48:24,267 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_2fdaf25d-007f-428d-a572-b7b2066eb3c7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-36.i[916,929] [2023-11-29 00:48:24,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:48:24,369 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:48:24,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24 WrapperNode [2023-11-29 00:48:24,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:48:24,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:24,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:48:24,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:48:24,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,492 INFO L138 Inliner]: procedures = 26, calls = 106, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 891 [2023-11-29 00:48:24,493 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:48:24,493 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:48:24,493 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:48:24,494 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:48:24,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,506 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,554 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 00:48:24,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:48:24,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:48:24,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:48:24,661 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:48:24,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (1/1) ... [2023-11-29 00:48:24,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:48:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:24,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:48:24,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:48:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:48:24,723 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:48:24,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:48:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:48:24,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:48:24,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:48:24,855 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:48:24,857 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:48:25,968 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:48:26,036 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:48:26,036 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:48:26,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:26 BoogieIcfgContainer [2023-11-29 00:48:26,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:48:26,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:48:26,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:48:26,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:48:26,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:48:23" (1/3) ... [2023-11-29 00:48:26,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0a6ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:26, skipping insertion in model container [2023-11-29 00:48:26,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:48:24" (2/3) ... [2023-11-29 00:48:26,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0a6ee8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:48:26, skipping insertion in model container [2023-11-29 00:48:26,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:48:26" (3/3) ... [2023-11-29 00:48:26,047 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-36.i [2023-11-29 00:48:26,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:48:26,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:48:26,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:48:26,137 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;@f17b97d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:48:26,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:48:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 227 states have (on average 1.7004405286343611) internal successors, (386), 228 states have internal predecessors, (386), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-29 00:48:26,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:26,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:26,186 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:26,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:26,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1777253943, now seen corresponding path program 1 times [2023-11-29 00:48:26,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:26,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473948824] [2023-11-29 00:48:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:26,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:26,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473948824] [2023-11-29 00:48:26,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 00:48:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886679049] [2023-11-29 00:48:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:26,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:26,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:26,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:48:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:27,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 00:48:27,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 16928 trivial. 0 not checked. [2023-11-29 00:48:27,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:27,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886679049] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:27,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:27,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:48:27,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486232162] [2023-11-29 00:48:27,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 00:48:27,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 00:48:27,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 00:48:27,147 INFO L87 Difference]: Start difference. First operand has 323 states, 227 states have (on average 1.7004405286343611) internal successors, (386), 228 states have internal predecessors, (386), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) [2023-11-29 00:48:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:27,239 INFO L93 Difference]: Finished difference Result 641 states and 1231 transitions. [2023-11-29 00:48:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 00:48:27,241 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) Word has length 604 [2023-11-29 00:48:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:27,254 INFO L225 Difference]: With dead ends: 641 [2023-11-29 00:48:27,254 INFO L226 Difference]: Without dead ends: 319 [2023-11-29 00:48:27,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 603 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 00:48:27,263 INFO L413 NwaCegarLoop]: 558 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, 558 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 00:48:27,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 558 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-29 00:48:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-11-29 00:48:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 224 states have (on average 1.6741071428571428) internal successors, (375), 224 states have internal predecessors, (375), 93 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2023-11-29 00:48:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 561 transitions. [2023-11-29 00:48:27,353 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 561 transitions. Word has length 604 [2023-11-29 00:48:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:27,354 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 561 transitions. [2023-11-29 00:48:27,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (93), 2 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 2 states have call successors, (93) [2023-11-29 00:48:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 561 transitions. [2023-11-29 00:48:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:27,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:27,372 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:27,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:27,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 00:48:27,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:27,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:27,574 INFO L85 PathProgramCache]: Analyzing trace with hash 296041563, now seen corresponding path program 1 times [2023-11-29 00:48:27,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:27,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551833181] [2023-11-29 00:48:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:27,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:27,696 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:27,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [415935093] [2023-11-29 00:48:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:27,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:27,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:27,699 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:27,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:48:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:28,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:28,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:28,211 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551833181] [2023-11-29 00:48:28,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415935093] [2023-11-29 00:48:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415935093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:28,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406491282] [2023-11-29 00:48:28,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:28,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:28,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:28,217 INFO L87 Difference]: Start difference. First operand 319 states and 561 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:28,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:28,342 INFO L93 Difference]: Finished difference Result 849 states and 1504 transitions. [2023-11-29 00:48:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:28,352 INFO L225 Difference]: With dead ends: 849 [2023-11-29 00:48:28,353 INFO L226 Difference]: Without dead ends: 531 [2023-11-29 00:48:28,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:28,356 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 377 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:28,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1334 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:48:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2023-11-29 00:48:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 528. [2023-11-29 00:48:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 402 states have (on average 1.7238805970149254) internal successors, (693), 403 states have internal predecessors, (693), 123 states have call successors, (123), 2 states have call predecessors, (123), 2 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2023-11-29 00:48:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 939 transitions. [2023-11-29 00:48:28,428 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 939 transitions. Word has length 604 [2023-11-29 00:48:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:28,431 INFO L495 AbstractCegarLoop]: Abstraction has 528 states and 939 transitions. [2023-11-29 00:48:28,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 939 transitions. [2023-11-29 00:48:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:28,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:28,451 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:28,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:48:28,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:28,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:28,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:28,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1135075225, now seen corresponding path program 1 times [2023-11-29 00:48:28,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:28,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168756346] [2023-11-29 00:48:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:28,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:28,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505106423] [2023-11-29 00:48:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:28,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:28,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:28,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:28,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:48:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:29,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 00:48:29,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:29,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:29,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:29,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168756346] [2023-11-29 00:48:29,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:29,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505106423] [2023-11-29 00:48:29,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505106423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:29,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:29,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:48:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468983213] [2023-11-29 00:48:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:29,325 INFO L87 Difference]: Start difference. First operand 528 states and 939 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:29,618 INFO L93 Difference]: Finished difference Result 1846 states and 3285 transitions. [2023-11-29 00:48:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:48:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:29,634 INFO L225 Difference]: With dead ends: 1846 [2023-11-29 00:48:29,635 INFO L226 Difference]: Without dead ends: 1319 [2023-11-29 00:48:29,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 602 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 00:48:29,638 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 732 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:29,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 2111 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:48:29,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-11-29 00:48:29,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1312. [2023-11-29 00:48:29,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1050 states have (on average 1.7466666666666666) internal successors, (1834), 1055 states have internal predecessors, (1834), 253 states have call successors, (253), 8 states have call predecessors, (253), 8 states have return successors, (253), 248 states have call predecessors, (253), 253 states have call successors, (253) [2023-11-29 00:48:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 2340 transitions. [2023-11-29 00:48:29,745 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 2340 transitions. Word has length 604 [2023-11-29 00:48:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:29,747 INFO L495 AbstractCegarLoop]: Abstraction has 1312 states and 2340 transitions. [2023-11-29 00:48:29,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:29,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 2340 transitions. [2023-11-29 00:48:29,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:29,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:29,756 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:29,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:48:29,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:29,957 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:29,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:29,957 INFO L85 PathProgramCache]: Analyzing trace with hash -81078501, now seen corresponding path program 1 times [2023-11-29 00:48:29,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:29,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008859789] [2023-11-29 00:48:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:29,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:30,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:30,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725337655] [2023-11-29 00:48:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:30,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:30,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:48:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:30,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:30,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:30,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:30,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008859789] [2023-11-29 00:48:30,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:30,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725337655] [2023-11-29 00:48:30,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725337655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:30,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:30,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208782875] [2023-11-29 00:48:30,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:30,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:30,510 INFO L87 Difference]: Start difference. First operand 1312 states and 2340 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:30,630 INFO L93 Difference]: Finished difference Result 3804 states and 6795 transitions. [2023-11-29 00:48:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:30,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:30,651 INFO L225 Difference]: With dead ends: 3804 [2023-11-29 00:48:30,651 INFO L226 Difference]: Without dead ends: 2493 [2023-11-29 00:48:30,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:30,657 INFO L413 NwaCegarLoop]: 555 mSDtfsCounter, 385 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:30,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1101 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2023-11-29 00:48:30,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2489. [2023-11-29 00:48:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2031 states have (on average 1.7533234859675038) internal successors, (3561), 2042 states have internal predecessors, (3561), 441 states have call successors, (441), 16 states have call predecessors, (441), 16 states have return successors, (441), 430 states have call predecessors, (441), 441 states have call successors, (441) [2023-11-29 00:48:30,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 4443 transitions. [2023-11-29 00:48:30,858 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 4443 transitions. Word has length 604 [2023-11-29 00:48:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:30,859 INFO L495 AbstractCegarLoop]: Abstraction has 2489 states and 4443 transitions. [2023-11-29 00:48:30,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 4443 transitions. [2023-11-29 00:48:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:30,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:30,870 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:30,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:48:31,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,071 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:31,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1653025949, now seen corresponding path program 1 times [2023-11-29 00:48:31,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:31,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79164372] [2023-11-29 00:48:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:31,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:31,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772204514] [2023-11-29 00:48:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:31,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:31,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:31,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:48:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:31,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 1407 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:31,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:31,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79164372] [2023-11-29 00:48:31,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772204514] [2023-11-29 00:48:31,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772204514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:31,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619873526] [2023-11-29 00:48:31,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:31,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:31,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:31,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:31,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:31,578 INFO L87 Difference]: Start difference. First operand 2489 states and 4443 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:31,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:31,763 INFO L93 Difference]: Finished difference Result 6809 states and 12076 transitions. [2023-11-29 00:48:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:31,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:31,796 INFO L225 Difference]: With dead ends: 6809 [2023-11-29 00:48:31,796 INFO L226 Difference]: Without dead ends: 4321 [2023-11-29 00:48:31,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:31,804 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 298 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:31,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 1228 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2023-11-29 00:48:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 4317. [2023-11-29 00:48:32,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 3459 states have (on average 1.7221740387395201) internal successors, (5957), 3482 states have internal predecessors, (5957), 825 states have call successors, (825), 32 states have call predecessors, (825), 32 states have return successors, (825), 802 states have call predecessors, (825), 825 states have call successors, (825) [2023-11-29 00:48:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 7607 transitions. [2023-11-29 00:48:32,082 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 7607 transitions. Word has length 604 [2023-11-29 00:48:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:32,083 INFO L495 AbstractCegarLoop]: Abstraction has 4317 states and 7607 transitions. [2023-11-29 00:48:32,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 7607 transitions. [2023-11-29 00:48:32,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:32,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:32,095 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:32,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:32,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:32,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:32,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -375560161, now seen corresponding path program 1 times [2023-11-29 00:48:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:32,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173616306] [2023-11-29 00:48:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:32,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:32,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857481738] [2023-11-29 00:48:32,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:32,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:32,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:32,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:32,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:48:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:32,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:32,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:32,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:32,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:32,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173616306] [2023-11-29 00:48:32,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:32,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857481738] [2023-11-29 00:48:32,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857481738] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:32,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:32,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:32,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910070792] [2023-11-29 00:48:32,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:32,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:32,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:32,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:32,950 INFO L87 Difference]: Start difference. First operand 4317 states and 7607 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:33,155 INFO L93 Difference]: Finished difference Result 8645 states and 15222 transitions. [2023-11-29 00:48:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:33,187 INFO L225 Difference]: With dead ends: 8645 [2023-11-29 00:48:33,187 INFO L226 Difference]: Without dead ends: 4329 [2023-11-29 00:48:33,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:33,200 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 258 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:33,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1215 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4329 states. [2023-11-29 00:48:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4329 to 3361. [2023-11-29 00:48:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 2901 states have (on average 1.7742157876594278) internal successors, (5147), 2912 states have internal predecessors, (5147), 441 states have call successors, (441), 18 states have call predecessors, (441), 18 states have return successors, (441), 430 states have call predecessors, (441), 441 states have call successors, (441) [2023-11-29 00:48:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 6029 transitions. [2023-11-29 00:48:33,443 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 6029 transitions. Word has length 604 [2023-11-29 00:48:33,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:33,444 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 6029 transitions. [2023-11-29 00:48:33,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:33,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 6029 transitions. [2023-11-29 00:48:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:33,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:33,455 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:33,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:48:33,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:33,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:33,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:33,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1396628515, now seen corresponding path program 1 times [2023-11-29 00:48:33,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:33,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358822409] [2023-11-29 00:48:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:33,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:33,724 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:33,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202569021] [2023-11-29 00:48:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:33,726 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:33,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:48:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:34,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 1405 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:34,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:34,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:34,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358822409] [2023-11-29 00:48:34,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202569021] [2023-11-29 00:48:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202569021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:34,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281678784] [2023-11-29 00:48:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:34,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:34,181 INFO L87 Difference]: Start difference. First operand 3361 states and 6029 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:34,447 INFO L93 Difference]: Finished difference Result 9985 states and 17893 transitions. [2023-11-29 00:48:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:34,492 INFO L225 Difference]: With dead ends: 9985 [2023-11-29 00:48:34,492 INFO L226 Difference]: Without dead ends: 6625 [2023-11-29 00:48:34,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:34,501 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 536 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:34,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1103 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6625 states. [2023-11-29 00:48:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6625 to 6623. [2023-11-29 00:48:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6623 states, 5704 states have (on average 1.7538569424964936) internal successors, (10004), 5726 states have internal predecessors, (10004), 882 states have call successors, (882), 36 states have call predecessors, (882), 36 states have return successors, (882), 860 states have call predecessors, (882), 882 states have call successors, (882) [2023-11-29 00:48:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6623 states to 6623 states and 11768 transitions. [2023-11-29 00:48:34,920 INFO L78 Accepts]: Start accepts. Automaton has 6623 states and 11768 transitions. Word has length 604 [2023-11-29 00:48:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:34,920 INFO L495 AbstractCegarLoop]: Abstraction has 6623 states and 11768 transitions. [2023-11-29 00:48:34,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 6623 states and 11768 transitions. [2023-11-29 00:48:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:34,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:34,934 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:34,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:35,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:35,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1577641887, now seen corresponding path program 1 times [2023-11-29 00:48:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531422948] [2023-11-29 00:48:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:35,202 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:35,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353687807] [2023-11-29 00:48:35,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:35,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:35,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:35,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:48:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:35,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 1408 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:35,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:35,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:35,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:35,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531422948] [2023-11-29 00:48:35,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:35,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353687807] [2023-11-29 00:48:35,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353687807] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:35,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:35,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:35,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681093444] [2023-11-29 00:48:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:35,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:35,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:35,677 INFO L87 Difference]: Start difference. First operand 6623 states and 11768 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:36,152 INFO L93 Difference]: Finished difference Result 17275 states and 30374 transitions. [2023-11-29 00:48:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:36,202 INFO L225 Difference]: With dead ends: 17275 [2023-11-29 00:48:36,202 INFO L226 Difference]: Without dead ends: 10653 [2023-11-29 00:48:36,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:36,220 INFO L413 NwaCegarLoop]: 905 mSDtfsCounter, 411 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:36,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 1446 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10653 states. [2023-11-29 00:48:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10653 to 7967. [2023-11-29 00:48:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7967 states, 7048 states have (on average 1.7497162315550512) internal successors, (12332), 7070 states have internal predecessors, (12332), 882 states have call successors, (882), 36 states have call predecessors, (882), 36 states have return successors, (882), 860 states have call predecessors, (882), 882 states have call successors, (882) [2023-11-29 00:48:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7967 states to 7967 states and 14096 transitions. [2023-11-29 00:48:36,755 INFO L78 Accepts]: Start accepts. Automaton has 7967 states and 14096 transitions. Word has length 604 [2023-11-29 00:48:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:36,756 INFO L495 AbstractCegarLoop]: Abstraction has 7967 states and 14096 transitions. [2023-11-29 00:48:36,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7967 states and 14096 transitions. [2023-11-29 00:48:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:36,775 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:36,775 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:36,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:48:36,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:36,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:36,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash -111301855, now seen corresponding path program 1 times [2023-11-29 00:48:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076392489] [2023-11-29 00:48:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:37,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088612229] [2023-11-29 00:48:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:37,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:37,048 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:48:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:37,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:37,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:37,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:37,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076392489] [2023-11-29 00:48:37,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088612229] [2023-11-29 00:48:37,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088612229] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:37,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:37,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:37,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258300290] [2023-11-29 00:48:37,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:37,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:37,507 INFO L87 Difference]: Start difference. First operand 7967 states and 14096 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:37,879 INFO L93 Difference]: Finished difference Result 23899 states and 42286 transitions. [2023-11-29 00:48:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:37,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:37,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:37,922 INFO L225 Difference]: With dead ends: 23899 [2023-11-29 00:48:37,922 INFO L226 Difference]: Without dead ends: 15933 [2023-11-29 00:48:37,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:37,938 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 547 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:37,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1117 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15933 states. [2023-11-29 00:48:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15933 to 15931. [2023-11-29 00:48:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15931 states, 14094 states have (on average 1.7464169149992905) internal successors, (24614), 14138 states have internal predecessors, (24614), 1764 states have call successors, (1764), 72 states have call predecessors, (1764), 72 states have return successors, (1764), 1720 states have call predecessors, (1764), 1764 states have call successors, (1764) [2023-11-29 00:48:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15931 states to 15931 states and 28142 transitions. [2023-11-29 00:48:38,655 INFO L78 Accepts]: Start accepts. Automaton has 15931 states and 28142 transitions. Word has length 604 [2023-11-29 00:48:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:38,655 INFO L495 AbstractCegarLoop]: Abstraction has 15931 states and 28142 transitions. [2023-11-29 00:48:38,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:38,656 INFO L276 IsEmpty]: Start isEmpty. Operand 15931 states and 28142 transitions. [2023-11-29 00:48:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:38,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:38,680 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:38,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:48:38,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:38,880 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:38,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:38,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1699649757, now seen corresponding path program 1 times [2023-11-29 00:48:38,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:38,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110220337] [2023-11-29 00:48:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:38,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:38,942 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:38,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379333021] [2023-11-29 00:48:38,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:38,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:38,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:38,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:38,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:48:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:39,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1410 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:48:39,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:39,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110220337] [2023-11-29 00:48:39,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:39,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379333021] [2023-11-29 00:48:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379333021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:39,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:39,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:48:39,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976727831] [2023-11-29 00:48:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:48:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:48:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:48:39,506 INFO L87 Difference]: Start difference. First operand 15931 states and 28142 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:40,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:40,202 INFO L93 Difference]: Finished difference Result 44107 states and 77396 transitions. [2023-11-29 00:48:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:48:40,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 604 [2023-11-29 00:48:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:40,257 INFO L225 Difference]: With dead ends: 44107 [2023-11-29 00:48:40,257 INFO L226 Difference]: Without dead ends: 28177 [2023-11-29 00:48:40,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 00:48:40,313 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 319 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:40,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1289 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:48:40,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28177 states. [2023-11-29 00:48:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28177 to 28171. [2023-11-29 00:48:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28171 states, 24570 states have (on average 1.7055759055759057) internal successors, (41906), 24662 states have internal predecessors, (41906), 3456 states have call successors, (3456), 144 states have call predecessors, (3456), 144 states have return successors, (3456), 3364 states have call predecessors, (3456), 3456 states have call successors, (3456) [2023-11-29 00:48:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28171 states to 28171 states and 48818 transitions. [2023-11-29 00:48:41,814 INFO L78 Accepts]: Start accepts. Automaton has 28171 states and 48818 transitions. Word has length 604 [2023-11-29 00:48:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:41,815 INFO L495 AbstractCegarLoop]: Abstraction has 28171 states and 48818 transitions. [2023-11-29 00:48:41,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 28171 states and 48818 transitions. [2023-11-29 00:48:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:41,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:41,838 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:41,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 00:48:42,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:42,039 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:42,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash -419786079, now seen corresponding path program 1 times [2023-11-29 00:48:42,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856366191] [2023-11-29 00:48:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:42,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:42,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:42,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283258484] [2023-11-29 00:48:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:42,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:42,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:42,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:48:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:42,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:42,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8376 proven. 162 refuted. 0 times theorem prover too weak. 8574 trivial. 0 not checked. [2023-11-29 00:48:42,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 114 proven. 162 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:48:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856366191] [2023-11-29 00:48:43,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:43,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283258484] [2023-11-29 00:48:43,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283258484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:43,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:43,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:48:43,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286334720] [2023-11-29 00:48:43,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:43,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:48:43,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:48:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:48:43,386 INFO L87 Difference]: Start difference. First operand 28171 states and 48818 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 00:48:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:44,513 INFO L93 Difference]: Finished difference Result 43030 states and 74384 transitions. [2023-11-29 00:48:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:48:44,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 604 [2023-11-29 00:48:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:44,551 INFO L225 Difference]: With dead ends: 43030 [2023-11-29 00:48:44,551 INFO L226 Difference]: Without dead ends: 14860 [2023-11-29 00:48:44,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 00:48:44,575 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 701 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:44,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 1309 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:48:44,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14860 states. [2023-11-29 00:48:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14860 to 14695. [2023-11-29 00:48:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14695 states, 12606 states have (on average 1.6898302395684595) internal successors, (21302), 12651 states have internal predecessors, (21302), 1990 states have call successors, (1990), 98 states have call predecessors, (1990), 98 states have return successors, (1990), 1945 states have call predecessors, (1990), 1990 states have call successors, (1990) [2023-11-29 00:48:45,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14695 states to 14695 states and 25282 transitions. [2023-11-29 00:48:45,286 INFO L78 Accepts]: Start accepts. Automaton has 14695 states and 25282 transitions. Word has length 604 [2023-11-29 00:48:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:45,287 INFO L495 AbstractCegarLoop]: Abstraction has 14695 states and 25282 transitions. [2023-11-29 00:48:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 00:48:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 14695 states and 25282 transitions. [2023-11-29 00:48:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 00:48:45,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:45,300 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:45,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:48:45,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:48:45,501 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:45,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:45,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2114011165, now seen corresponding path program 1 times [2023-11-29 00:48:45,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:45,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410643564] [2023-11-29 00:48:45,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:45,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:45,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:45,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143669166] [2023-11-29 00:48:45,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:45,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:45,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:45,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:48:46,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:46,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:46,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 8576 proven. 150 refuted. 0 times theorem prover too weak. 8386 trivial. 0 not checked. [2023-11-29 00:48:46,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 126 proven. 150 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:48:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410643564] [2023-11-29 00:48:46,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143669166] [2023-11-29 00:48:46,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143669166] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:46,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:46,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:48:46,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440527475] [2023-11-29 00:48:46,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:46,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:48:46,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:48:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:48:46,873 INFO L87 Difference]: Start difference. First operand 14695 states and 25282 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-29 00:48:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:47,963 INFO L93 Difference]: Finished difference Result 25145 states and 42915 transitions. [2023-11-29 00:48:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:48:47,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 604 [2023-11-29 00:48:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:48,039 INFO L225 Difference]: With dead ends: 25145 [2023-11-29 00:48:48,039 INFO L226 Difference]: Without dead ends: 10519 [2023-11-29 00:48:48,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 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 00:48:48,053 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 652 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:48,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 1169 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2023-11-29 00:48:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10355. [2023-11-29 00:48:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10355 states, 8250 states have (on average 1.6448484848484848) internal successors, (13570), 8295 states have internal predecessors, (13570), 1990 states have call successors, (1990), 114 states have call predecessors, (1990), 114 states have return successors, (1990), 1945 states have call predecessors, (1990), 1990 states have call successors, (1990) [2023-11-29 00:48:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10355 states to 10355 states and 17550 transitions. [2023-11-29 00:48:48,700 INFO L78 Accepts]: Start accepts. Automaton has 10355 states and 17550 transitions. Word has length 604 [2023-11-29 00:48:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:48,701 INFO L495 AbstractCegarLoop]: Abstraction has 10355 states and 17550 transitions. [2023-11-29 00:48:48,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-29 00:48:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 10355 states and 17550 transitions. [2023-11-29 00:48:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-29 00:48:48,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:48,714 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:48,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:48:48,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:48:48,922 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:48,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:48,923 INFO L85 PathProgramCache]: Analyzing trace with hash -425061905, now seen corresponding path program 1 times [2023-11-29 00:48:48,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:48,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975585870] [2023-11-29 00:48:48,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:48,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:48,991 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:48,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085655262] [2023-11-29 00:48:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:48,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:48,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:48,993 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:48,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:48:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:49,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 6926 proven. 75 refuted. 0 times theorem prover too weak. 10111 trivial. 0 not checked. [2023-11-29 00:48:49,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 201 proven. 75 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:48:49,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975585870] [2023-11-29 00:48:49,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:49,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085655262] [2023-11-29 00:48:49,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085655262] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:49,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:49,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 00:48:49,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765264174] [2023-11-29 00:48:49,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:48:49,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:48:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:48:49,911 INFO L87 Difference]: Start difference. First operand 10355 states and 17550 transitions. Second operand has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-29 00:48:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:50,853 INFO L93 Difference]: Finished difference Result 20405 states and 34439 transitions. [2023-11-29 00:48:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:48:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) Word has length 605 [2023-11-29 00:48:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:50,881 INFO L225 Difference]: With dead ends: 20405 [2023-11-29 00:48:50,881 INFO L226 Difference]: Without dead ends: 10119 [2023-11-29 00:48:50,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1202 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:48:50,900 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 1048 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 1133 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10119 states. [2023-11-29 00:48:51,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10119 to 5517. [2023-11-29 00:48:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5517 states, 4440 states have (on average 1.60990990990991) internal successors, (7148), 4463 states have internal predecessors, (7148), 1014 states have call successors, (1014), 62 states have call predecessors, (1014), 62 states have return successors, (1014), 991 states have call predecessors, (1014), 1014 states have call successors, (1014) [2023-11-29 00:48:51,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5517 states to 5517 states and 9176 transitions. [2023-11-29 00:48:51,345 INFO L78 Accepts]: Start accepts. Automaton has 5517 states and 9176 transitions. Word has length 605 [2023-11-29 00:48:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:51,346 INFO L495 AbstractCegarLoop]: Abstraction has 5517 states and 9176 transitions. [2023-11-29 00:48:51,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 23.75) internal successors, (190), 8 states have internal predecessors, (190), 3 states have call successors, (118), 2 states have call predecessors, (118), 4 states have return successors, (119), 3 states have call predecessors, (119), 3 states have call successors, (119) [2023-11-29 00:48:51,347 INFO L276 IsEmpty]: Start isEmpty. Operand 5517 states and 9176 transitions. [2023-11-29 00:48:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-29 00:48:51,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:51,356 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:51,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:48:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 00:48:51,557 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:51,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash -479454803, now seen corresponding path program 1 times [2023-11-29 00:48:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:51,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394067078] [2023-11-29 00:48:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:51,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:51,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991833451] [2023-11-29 00:48:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:51,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:51,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:51,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:51,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:48:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:51,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:48:52,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 5108 proven. 48 refuted. 0 times theorem prover too weak. 11956 trivial. 0 not checked. [2023-11-29 00:48:52,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 228 proven. 48 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:48:52,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394067078] [2023-11-29 00:48:52,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:52,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991833451] [2023-11-29 00:48:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991833451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:52,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:52,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 00:48:52,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986125785] [2023-11-29 00:48:52,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:48:52,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:48:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:48:52,471 INFO L87 Difference]: Start difference. First operand 5517 states and 9176 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-29 00:48:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:53,096 INFO L93 Difference]: Finished difference Result 8705 states and 14561 transitions. [2023-11-29 00:48:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:48:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) Word has length 605 [2023-11-29 00:48:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:53,103 INFO L225 Difference]: With dead ends: 8705 [2023-11-29 00:48:53,104 INFO L226 Difference]: Without dead ends: 3257 [2023-11-29 00:48:53,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1202 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 00:48:53,109 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 690 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:53,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 1139 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:48:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2023-11-29 00:48:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 3209. [2023-11-29 00:48:53,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2630 states have (on average 1.614448669201521) internal successors, (4246), 2641 states have internal predecessors, (4246), 544 states have call successors, (544), 34 states have call predecessors, (544), 34 states have return successors, (544), 533 states have call predecessors, (544), 544 states have call successors, (544) [2023-11-29 00:48:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5334 transitions. [2023-11-29 00:48:53,308 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5334 transitions. Word has length 605 [2023-11-29 00:48:53,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:53,308 INFO L495 AbstractCegarLoop]: Abstraction has 3209 states and 5334 transitions. [2023-11-29 00:48:53,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (109), 2 states have call predecessors, (109), 4 states have return successors, (110), 2 states have call predecessors, (110), 2 states have call successors, (110) [2023-11-29 00:48:53,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5334 transitions. [2023-11-29 00:48:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 00:48:53,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:53,315 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:53,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:48:53,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:53,516 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:53,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1183633978, now seen corresponding path program 1 times [2023-11-29 00:48:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427260489] [2023-11-29 00:48:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:53,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:53,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625026410] [2023-11-29 00:48:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:53,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:53,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:53,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:53,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:48:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:54,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 00:48:54,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 7836 proven. 180 refuted. 0 times theorem prover too weak. 9096 trivial. 0 not checked. [2023-11-29 00:48:54,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 96 proven. 180 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:48:54,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427260489] [2023-11-29 00:48:54,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:54,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625026410] [2023-11-29 00:48:54,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625026410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:54,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:48:54,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2023-11-29 00:48:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114193413] [2023-11-29 00:48:54,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 00:48:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:54,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 00:48:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:48:54,803 INFO L87 Difference]: Start difference. First operand 3209 states and 5334 transitions. Second operand has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 3 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 3 states have call predecessors, (154), 3 states have call successors, (154) [2023-11-29 00:48:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:56,796 INFO L93 Difference]: Finished difference Result 11675 states and 19313 transitions. [2023-11-29 00:48:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 00:48:56,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 3 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 3 states have call predecessors, (154), 3 states have call successors, (154) Word has length 608 [2023-11-29 00:48:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:56,810 INFO L225 Difference]: With dead ends: 11675 [2023-11-29 00:48:56,810 INFO L226 Difference]: Without dead ends: 8535 [2023-11-29 00:48:56,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1234 GetRequests, 1206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:48:56,815 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 1328 mSDsluCounter, 4128 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 4956 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:56,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 4956 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:48:56,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8535 states. [2023-11-29 00:48:57,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8535 to 6015. [2023-11-29 00:48:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 5042 states have (on average 1.6227687425624753) internal successors, (8182), 5065 states have internal predecessors, (8182), 912 states have call successors, (912), 60 states have call predecessors, (912), 60 states have return successors, (912), 889 states have call predecessors, (912), 912 states have call successors, (912) [2023-11-29 00:48:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 10006 transitions. [2023-11-29 00:48:57,152 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 10006 transitions. Word has length 608 [2023-11-29 00:48:57,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:57,153 INFO L495 AbstractCegarLoop]: Abstraction has 6015 states and 10006 transitions. [2023-11-29 00:48:57,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.333333333333332) internal successors, (208), 12 states have internal predecessors, (208), 3 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 3 states have call predecessors, (154), 3 states have call successors, (154) [2023-11-29 00:48:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 10006 transitions. [2023-11-29 00:48:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 00:48:57,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:57,159 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:57,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:48:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:48:57,360 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:57,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash -695496968, now seen corresponding path program 1 times [2023-11-29 00:48:57,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:57,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351371739] [2023-11-29 00:48:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:57,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:57,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:57,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75433633] [2023-11-29 00:48:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:57,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:57,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:57,420 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:57,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:48:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:57,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:48:57,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:48:57,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:48:57,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:57,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351371739] [2023-11-29 00:48:57,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:48:57,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75433633] [2023-11-29 00:48:57,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75433633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:48:57,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:48:57,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:48:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133150475] [2023-11-29 00:48:57,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:48:57,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:48:57,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:58,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:48:58,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:48:58,000 INFO L87 Difference]: Start difference. First operand 6015 states and 10006 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:58,843 INFO L93 Difference]: Finished difference Result 17894 states and 29799 transitions. [2023-11-29 00:48:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:48:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 608 [2023-11-29 00:48:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:58,862 INFO L225 Difference]: With dead ends: 17894 [2023-11-29 00:48:58,862 INFO L226 Difference]: Without dead ends: 11956 [2023-11-29 00:48:58,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 605 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 00:48:58,868 INFO L413 NwaCegarLoop]: 1040 mSDtfsCounter, 928 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:58,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 1589 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:48:58,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11956 states. [2023-11-29 00:48:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11956 to 11947. [2023-11-29 00:48:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11947 states, 10044 states have (on average 1.6138988450816407) internal successors, (16210), 10089 states have internal predecessors, (16210), 1786 states have call successors, (1786), 116 states have call predecessors, (1786), 116 states have return successors, (1786), 1741 states have call predecessors, (1786), 1786 states have call successors, (1786) [2023-11-29 00:48:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11947 states to 11947 states and 19782 transitions. [2023-11-29 00:48:59,490 INFO L78 Accepts]: Start accepts. Automaton has 11947 states and 19782 transitions. Word has length 608 [2023-11-29 00:48:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:59,491 INFO L495 AbstractCegarLoop]: Abstraction has 11947 states and 19782 transitions. [2023-11-29 00:48:59,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:48:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 11947 states and 19782 transitions. [2023-11-29 00:48:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-29 00:48:59,500 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:59,500 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:48:59,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:48:59,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:48:59,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:48:59,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:59,701 INFO L85 PathProgramCache]: Analyzing trace with hash 483603315, now seen corresponding path program 1 times [2023-11-29 00:48:59,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997905292] [2023-11-29 00:48:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:59,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:48:59,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492636417] [2023-11-29 00:48:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:59,751 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:59,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:49:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:00,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:49:00,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:49:00,269 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997905292] [2023-11-29 00:49:00,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492636417] [2023-11-29 00:49:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492636417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:49:00,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217666309] [2023-11-29 00:49:00,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:49:00,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:00,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:49:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:49:00,273 INFO L87 Difference]: Start difference. First operand 11947 states and 19782 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:02,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:02,735 INFO L93 Difference]: Finished difference Result 34015 states and 56097 transitions. [2023-11-29 00:49:02,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:49:02,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 609 [2023-11-29 00:49:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:02,773 INFO L225 Difference]: With dead ends: 34015 [2023-11-29 00:49:02,773 INFO L226 Difference]: Without dead ends: 22145 [2023-11-29 00:49:02,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:49:02,790 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 1537 mSDsluCounter, 3418 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 4454 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:02,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 4454 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:49:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22145 states. [2023-11-29 00:49:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22145 to 6169. [2023-11-29 00:49:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6169 states, 5386 states have (on average 1.6836242109171928) internal successors, (9068), 5395 states have internal predecessors, (9068), 706 states have call successors, (706), 76 states have call predecessors, (706), 76 states have return successors, (706), 697 states have call predecessors, (706), 706 states have call successors, (706) [2023-11-29 00:49:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6169 states to 6169 states and 10480 transitions. [2023-11-29 00:49:03,456 INFO L78 Accepts]: Start accepts. Automaton has 6169 states and 10480 transitions. Word has length 609 [2023-11-29 00:49:03,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:03,457 INFO L495 AbstractCegarLoop]: Abstraction has 6169 states and 10480 transitions. [2023-11-29 00:49:03,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6169 states and 10480 transitions. [2023-11-29 00:49:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-29 00:49:03,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:03,462 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:03,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:49:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:49:03,663 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:03,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 943513007, now seen corresponding path program 1 times [2023-11-29 00:49:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:03,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537621966] [2023-11-29 00:49:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:03,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:03,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:03,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048123807] [2023-11-29 00:49:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:03,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:03,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:03,718 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:03,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:49:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:04,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:49:04,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 7778 proven. 93 refuted. 0 times theorem prover too weak. 9241 trivial. 0 not checked. [2023-11-29 00:49:05,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 183 proven. 93 refuted. 0 times theorem prover too weak. 16836 trivial. 0 not checked. [2023-11-29 00:49:07,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:07,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537621966] [2023-11-29 00:49:07,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:07,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048123807] [2023-11-29 00:49:07,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048123807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:07,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:49:07,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2023-11-29 00:49:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377662435] [2023-11-29 00:49:07,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:07,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:49:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:49:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:49:07,070 INFO L87 Difference]: Start difference. First operand 6169 states and 10480 transitions. Second operand has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 00:49:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:19,927 INFO L93 Difference]: Finished difference Result 46297 states and 74924 transitions. [2023-11-29 00:49:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-29 00:49:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 609 [2023-11-29 00:49:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:19,982 INFO L225 Difference]: With dead ends: 46297 [2023-11-29 00:49:19,982 INFO L226 Difference]: Without dead ends: 40205 [2023-11-29 00:49:19,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 1208 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1384, Invalid=4316, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 00:49:19,995 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 4947 mSDsluCounter, 7612 mSDsCounter, 0 mSdLazyCounter, 6411 mSolverCounterSat, 1882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5152 SdHoareTripleChecker+Valid, 8430 SdHoareTripleChecker+Invalid, 8293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1882 IncrementalHoareTripleChecker+Valid, 6411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:19,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5152 Valid, 8430 Invalid, 8293 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1882 Valid, 6411 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-11-29 00:49:20,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40205 states. [2023-11-29 00:49:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40205 to 15003. [2023-11-29 00:49:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15003 states, 13612 states have (on average 1.7161328239788423) internal successors, (23360), 13633 states have internal predecessors, (23360), 1246 states have call successors, (1246), 144 states have call predecessors, (1246), 144 states have return successors, (1246), 1225 states have call predecessors, (1246), 1246 states have call successors, (1246) [2023-11-29 00:49:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15003 states to 15003 states and 25852 transitions. [2023-11-29 00:49:21,409 INFO L78 Accepts]: Start accepts. Automaton has 15003 states and 25852 transitions. Word has length 609 [2023-11-29 00:49:21,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:21,409 INFO L495 AbstractCegarLoop]: Abstraction has 15003 states and 25852 transitions. [2023-11-29 00:49:21,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.421052631578947) internal successors, (217), 19 states have internal predecessors, (217), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-29 00:49:21,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15003 states and 25852 transitions. [2023-11-29 00:49:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-29 00:49:21,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:21,419 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:21,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:49:21,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:49:21,619 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:21,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1474971471, now seen corresponding path program 1 times [2023-11-29 00:49:21,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217736034] [2023-11-29 00:49:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:21,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:21,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:21,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166245456] [2023-11-29 00:49:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:21,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:21,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:21,676 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:21,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:49:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:22,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:49:22,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:49:22,702 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:22,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217736034] [2023-11-29 00:49:22,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:22,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166245456] [2023-11-29 00:49:22,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166245456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:22,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:22,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:49:22,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067936096] [2023-11-29 00:49:22,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:49:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:22,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:49:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:49:22,705 INFO L87 Difference]: Start difference. First operand 15003 states and 25852 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:25,693 INFO L93 Difference]: Finished difference Result 46321 states and 79189 transitions. [2023-11-29 00:49:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:49:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 609 [2023-11-29 00:49:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:25,732 INFO L225 Difference]: With dead ends: 46321 [2023-11-29 00:49:25,733 INFO L226 Difference]: Without dead ends: 31395 [2023-11-29 00:49:25,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:49:25,746 INFO L413 NwaCegarLoop]: 801 mSDtfsCounter, 843 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:25,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 2829 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:49:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31395 states. [2023-11-29 00:49:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31395 to 29023. [2023-11-29 00:49:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29023 states, 26284 states have (on average 1.7093288692740831) internal successors, (44928), 26325 states have internal predecessors, (44928), 2454 states have call successors, (2454), 284 states have call predecessors, (2454), 284 states have return successors, (2454), 2413 states have call predecessors, (2454), 2454 states have call successors, (2454) [2023-11-29 00:49:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29023 states to 29023 states and 49836 transitions. [2023-11-29 00:49:27,865 INFO L78 Accepts]: Start accepts. Automaton has 29023 states and 49836 transitions. Word has length 609 [2023-11-29 00:49:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:27,865 INFO L495 AbstractCegarLoop]: Abstraction has 29023 states and 49836 transitions. [2023-11-29 00:49:27,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 5 states have internal predecessors, (147), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 29023 states and 49836 transitions. [2023-11-29 00:49:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:49:27,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:27,880 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:27,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 00:49:28,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:28,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:28,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:28,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1910372756, now seen corresponding path program 1 times [2023-11-29 00:49:28,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:28,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753405432] [2023-11-29 00:49:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:28,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:28,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:28,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984248114] [2023-11-29 00:49:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:28,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:28,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:28,139 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:28,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:49:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:28,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 00:49:28,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:49:28,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:28,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753405432] [2023-11-29 00:49:28,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:28,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984248114] [2023-11-29 00:49:28,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984248114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:28,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:28,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:49:28,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264887215] [2023-11-29 00:49:28,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:28,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:49:28,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:49:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:49:28,678 INFO L87 Difference]: Start difference. First operand 29023 states and 49836 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:39,935 INFO L93 Difference]: Finished difference Result 161305 states and 275023 transitions. [2023-11-29 00:49:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 00:49:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:49:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:40,112 INFO L225 Difference]: With dead ends: 161305 [2023-11-29 00:49:40,112 INFO L226 Difference]: Without dead ends: 132359 [2023-11-29 00:49:40,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:49:40,149 INFO L413 NwaCegarLoop]: 1366 mSDtfsCounter, 2285 mSDsluCounter, 4366 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 5732 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:40,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2285 Valid, 5732 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:49:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132359 states. [2023-11-29 00:49:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132359 to 102125. [2023-11-29 00:49:47,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102125 states, 93937 states have (on average 1.716544066768153) internal successors, (161247), 94114 states have internal predecessors, (161247), 7494 states have call successors, (7494), 693 states have call predecessors, (7494), 693 states have return successors, (7494), 7317 states have call predecessors, (7494), 7494 states have call successors, (7494) [2023-11-29 00:49:48,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102125 states to 102125 states and 176235 transitions. [2023-11-29 00:49:48,080 INFO L78 Accepts]: Start accepts. Automaton has 102125 states and 176235 transitions. Word has length 610 [2023-11-29 00:49:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:48,081 INFO L495 AbstractCegarLoop]: Abstraction has 102125 states and 176235 transitions. [2023-11-29 00:49:48,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:48,081 INFO L276 IsEmpty]: Start isEmpty. Operand 102125 states and 176235 transitions. [2023-11-29 00:49:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:49:48,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:48,140 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:49:48,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:49:48,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:48,340 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:49:48,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:48,341 INFO L85 PathProgramCache]: Analyzing trace with hash -476136750, now seen corresponding path program 1 times [2023-11-29 00:49:48,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:48,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096648060] [2023-11-29 00:49:48,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:48,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:48,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:49:48,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428799407] [2023-11-29 00:49:48,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:48,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:48,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:48,401 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:48,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:49:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:48,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:49:48,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:49:49,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:49:49,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096648060] [2023-11-29 00:49:49,350 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:49:49,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428799407] [2023-11-29 00:49:49,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428799407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:49:49,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:49:49,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:49:49,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182588128] [2023-11-29 00:49:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:49:49,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:49:49,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:49:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:49:49,353 INFO L87 Difference]: Start difference. First operand 102125 states and 176235 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:49:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:58,449 INFO L93 Difference]: Finished difference Result 230367 states and 398267 transitions. [2023-11-29 00:49:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:49:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:49:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:58,627 INFO L225 Difference]: With dead ends: 230367 [2023-11-29 00:49:58,627 INFO L226 Difference]: Without dead ends: 128323 [2023-11-29 00:49:58,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 605 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:49:58,684 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 1330 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1330 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:58,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1330 Valid, 3444 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:49:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128323 states. [2023-11-29 00:50:08,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128323 to 128221. [2023-11-29 00:50:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128221 states, 118833 states have (on average 1.719076350845304) internal successors, (204283), 119058 states have internal predecessors, (204283), 8646 states have call successors, (8646), 741 states have call predecessors, (8646), 741 states have return successors, (8646), 8421 states have call predecessors, (8646), 8646 states have call successors, (8646) [2023-11-29 00:50:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128221 states to 128221 states and 221575 transitions. [2023-11-29 00:50:08,693 INFO L78 Accepts]: Start accepts. Automaton has 128221 states and 221575 transitions. Word has length 610 [2023-11-29 00:50:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:08,694 INFO L495 AbstractCegarLoop]: Abstraction has 128221 states and 221575 transitions. [2023-11-29 00:50:08,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:50:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 128221 states and 221575 transitions. [2023-11-29 00:50:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:50:08,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:08,767 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:50:08,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:50:08,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 00:50:08,967 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:50:08,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:08,968 INFO L85 PathProgramCache]: Analyzing trace with hash -747807478, now seen corresponding path program 1 times [2023-11-29 00:50:08,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:08,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172543032] [2023-11-29 00:50:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:08,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:09,204 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:50:09,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369890084] [2023-11-29 00:50:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:09,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:09,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:09,206 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:09,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:50:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:09,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:50:09,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:50:10,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:50:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172543032] [2023-11-29 00:50:10,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:50:10,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369890084] [2023-11-29 00:50:10,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369890084] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:50:10,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:50:10,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:50:10,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101168551] [2023-11-29 00:50:10,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:50:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:50:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:50:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:50:10,232 INFO L87 Difference]: Start difference. First operand 128221 states and 221575 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:50:12,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:20,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:24,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:31,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:36,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:45,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:50:50,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:51:01,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:51:06,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 00:51:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:21,844 INFO L93 Difference]: Finished difference Result 485071 states and 835025 transitions. [2023-11-29 00:51:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:51:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:51:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:22,435 INFO L225 Difference]: With dead ends: 485071 [2023-11-29 00:51:22,435 INFO L226 Difference]: Without dead ends: 356931 [2023-11-29 00:51:22,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 609 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:51:22,527 INFO L413 NwaCegarLoop]: 896 mSDtfsCounter, 2034 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2034 SdHoareTripleChecker+Valid, 3155 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:22,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2034 Valid, 3155 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 44.8s Time] [2023-11-29 00:51:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356931 states. [2023-11-29 00:51:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356931 to 143145. [2023-11-29 00:51:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143145 states, 133757 states have (on average 1.7290235277406043) internal successors, (231269), 133982 states have internal predecessors, (231269), 8646 states have call successors, (8646), 741 states have call predecessors, (8646), 741 states have return successors, (8646), 8421 states have call predecessors, (8646), 8646 states have call successors, (8646) [2023-11-29 00:51:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143145 states to 143145 states and 248561 transitions. [2023-11-29 00:51:35,977 INFO L78 Accepts]: Start accepts. Automaton has 143145 states and 248561 transitions. Word has length 610 [2023-11-29 00:51:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:35,978 INFO L495 AbstractCegarLoop]: Abstraction has 143145 states and 248561 transitions. [2023-11-29 00:51:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:51:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 143145 states and 248561 transitions. [2023-11-29 00:51:36,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:51:36,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:36,040 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:51:36,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:51:36,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:51:36,241 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:51:36,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:36,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1715158132, now seen corresponding path program 1 times [2023-11-29 00:51:36,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:36,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879287188] [2023-11-29 00:51:36,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:36,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:36,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:51:36,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598134964] [2023-11-29 00:51:36,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:36,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:36,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:36,295 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:36,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:51:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:36,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:51:36,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:51:36,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:51:36,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879287188] [2023-11-29 00:51:36,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:51:36,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598134964] [2023-11-29 00:51:36,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598134964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:36,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:36,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:36,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342466958] [2023-11-29 00:51:36,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:36,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:36,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:36,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:36,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:36,878 INFO L87 Difference]: Start difference. First operand 143145 states and 248561 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:51:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:50,826 INFO L93 Difference]: Finished difference Result 364019 states and 634361 transitions. [2023-11-29 00:51:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:51:50,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:51,082 INFO L225 Difference]: With dead ends: 364019 [2023-11-29 00:51:51,082 INFO L226 Difference]: Without dead ends: 191345 [2023-11-29 00:51:51,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 607 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 00:51:51,155 INFO L413 NwaCegarLoop]: 962 mSDtfsCounter, 660 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 2313 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:51,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 2313 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:51:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191345 states. [2023-11-29 00:52:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191345 to 190223. [2023-11-29 00:52:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190223 states, 178763 states have (on average 1.729636446020709) internal successors, (309195), 179060 states have internal predecessors, (309195), 10598 states have call successors, (10598), 861 states have call predecessors, (10598), 861 states have return successors, (10598), 10301 states have call predecessors, (10598), 10598 states have call successors, (10598) [2023-11-29 00:52:07,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190223 states to 190223 states and 330391 transitions. [2023-11-29 00:52:07,135 INFO L78 Accepts]: Start accepts. Automaton has 190223 states and 330391 transitions. Word has length 610 [2023-11-29 00:52:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:07,135 INFO L495 AbstractCegarLoop]: Abstraction has 190223 states and 330391 transitions. [2023-11-29 00:52:07,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:52:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 190223 states and 330391 transitions. [2023-11-29 00:52:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:52:07,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:07,213 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:52:07,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:52:07,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:07,414 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:52:07,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash -148400182, now seen corresponding path program 1 times [2023-11-29 00:52:07,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:07,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736786963] [2023-11-29 00:52:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:07,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:07,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:52:07,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595927412] [2023-11-29 00:52:07,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:07,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:07,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:07,458 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:07,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:52:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:08,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 00:52:08,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:52:09,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:52:09,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736786963] [2023-11-29 00:52:09,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:52:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595927412] [2023-11-29 00:52:09,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595927412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:52:09,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:52:09,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:52:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723407815] [2023-11-29 00:52:09,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:52:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:52:09,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:52:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:52:09,575 INFO L87 Difference]: Start difference. First operand 190223 states and 330391 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:52:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:59,414 INFO L93 Difference]: Finished difference Result 780571 states and 1350519 transitions. [2023-11-29 00:52:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:52:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:52:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:53:00,357 INFO L225 Difference]: With dead ends: 780571 [2023-11-29 00:53:00,357 INFO L226 Difference]: Without dead ends: 590429 [2023-11-29 00:53:00,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:53:00,492 INFO L413 NwaCegarLoop]: 1147 mSDtfsCounter, 1974 mSDsluCounter, 4546 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1974 SdHoareTripleChecker+Valid, 5693 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:53:00,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1974 Valid, 5693 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 00:53:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590429 states. [2023-11-29 00:53:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590429 to 493651. [2023-11-29 00:53:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493651 states, 472583 states have (on average 1.7477416665432315) internal successors, (825953), 473184 states have internal predecessors, (825953), 19622 states have call successors, (19622), 1445 states have call predecessors, (19622), 1445 states have return successors, (19622), 19021 states have call predecessors, (19622), 19622 states have call successors, (19622) [2023-11-29 00:53:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493651 states to 493651 states and 865197 transitions. [2023-11-29 00:53:35,135 INFO L78 Accepts]: Start accepts. Automaton has 493651 states and 865197 transitions. Word has length 610 [2023-11-29 00:53:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:53:35,136 INFO L495 AbstractCegarLoop]: Abstraction has 493651 states and 865197 transitions. [2023-11-29 00:53:35,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:53:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 493651 states and 865197 transitions. [2023-11-29 00:53:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:53:35,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:53:35,705 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:53:35,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:53:35,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:35,906 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:53:35,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1537779656, now seen corresponding path program 1 times [2023-11-29 00:53:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:35,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70372537] [2023-11-29 00:53:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:35,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:35,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:53:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050982435] [2023-11-29 00:53:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:35,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:35,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:35,970 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:35,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:53:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:36,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:53:36,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:53:36,474 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:53:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:36,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70372537] [2023-11-29 00:53:36,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:53:36,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050982435] [2023-11-29 00:53:36,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050982435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:53:36,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:53:36,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:53:36,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310425755] [2023-11-29 00:53:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:53:36,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:53:36,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:36,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:53:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:53:36,477 INFO L87 Difference]: Start difference. First operand 493651 states and 865197 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:54:27,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:54:27,636 INFO L93 Difference]: Finished difference Result 1374397 states and 2407434 transitions. [2023-11-29 00:54:27,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:54:27,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:54:27,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:54:29,281 INFO L225 Difference]: With dead ends: 1374397 [2023-11-29 00:54:29,281 INFO L226 Difference]: Without dead ends: 880827 [2023-11-29 00:54:29,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 608 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 00:54:29,505 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 339 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:54:29,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1053 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:54:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880827 states. [2023-11-29 00:55:08,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880827 to 711511. [2023-11-29 00:55:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711511 states, 688042 states have (on average 1.7629432505573788) internal successors, (1212979), 688739 states have internal predecessors, (1212979), 21926 states have call successors, (21926), 1542 states have call predecessors, (21926), 1542 states have return successors, (21926), 21229 states have call predecessors, (21926), 21926 states have call successors, (21926) [2023-11-29 00:55:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711511 states to 711511 states and 1256831 transitions. [2023-11-29 00:55:11,664 INFO L78 Accepts]: Start accepts. Automaton has 711511 states and 1256831 transitions. Word has length 610 [2023-11-29 00:55:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:11,664 INFO L495 AbstractCegarLoop]: Abstraction has 711511 states and 1256831 transitions. [2023-11-29 00:55:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:55:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 711511 states and 1256831 transitions. [2023-11-29 00:55:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:55:12,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:12,027 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:55:12,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:55:12,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 00:55:12,227 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:55:12,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:12,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1717883617, now seen corresponding path program 1 times [2023-11-29 00:55:12,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:12,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929709356] [2023-11-29 00:55:12,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:12,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:12,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:55:12,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400594640] [2023-11-29 00:55:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:12,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:12,280 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:12,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:55:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:12,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 00:55:12,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:55:13,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:55:13,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:13,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929709356] [2023-11-29 00:55:13,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:55:13,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400594640] [2023-11-29 00:55:13,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400594640] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:55:13,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:55:13,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 00:55:13,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430255895] [2023-11-29 00:55:13,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:55:13,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:55:13,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:13,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:55:13,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:55:13,443 INFO L87 Difference]: Start difference. First operand 711511 states and 1256831 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:56:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:41,739 INFO L93 Difference]: Finished difference Result 1998031 states and 3502708 transitions. [2023-11-29 00:56:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:56:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) Word has length 610 [2023-11-29 00:56:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:44,059 INFO L225 Difference]: With dead ends: 1998031 [2023-11-29 00:56:44,059 INFO L226 Difference]: Without dead ends: 1286605 [2023-11-29 00:56:44,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:56:44,405 INFO L413 NwaCegarLoop]: 1137 mSDtfsCounter, 2671 mSDsluCounter, 3256 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2671 SdHoareTripleChecker+Valid, 4393 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:44,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2671 Valid, 4393 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2388 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 00:56:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286605 states. [2023-11-29 00:57:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286605 to 871472. [2023-11-29 00:57:39,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871472 states, 841087 states have (on average 1.7574258073183868) internal successors, (1478148), 842032 states have internal predecessors, (1478148), 28470 states have call successors, (28470), 1914 states have call predecessors, (28470), 1914 states have return successors, (28470), 27525 states have call predecessors, (28470), 28470 states have call successors, (28470) [2023-11-29 00:57:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871472 states to 871472 states and 1535088 transitions. [2023-11-29 00:57:42,630 INFO L78 Accepts]: Start accepts. Automaton has 871472 states and 1535088 transitions. Word has length 610 [2023-11-29 00:57:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:57:42,631 INFO L495 AbstractCegarLoop]: Abstraction has 871472 states and 1535088 transitions. [2023-11-29 00:57:42,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 8 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93) [2023-11-29 00:57:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 871472 states and 1535088 transitions. [2023-11-29 00:57:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2023-11-29 00:57:43,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:57:43,059 INFO L195 NwaCegarLoop]: trace histogram [93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:57:43,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:57:43,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:57:43,260 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:57:43,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:57:43,261 INFO L85 PathProgramCache]: Analyzing trace with hash 190574173, now seen corresponding path program 1 times [2023-11-29 00:57:43,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:57:43,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14955037] [2023-11-29 00:57:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:57:43,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:57:43,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615747249] [2023-11-29 00:57:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:43,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:43,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:43,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdaf25d-007f-428d-a572-b7b2066eb3c7/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:57:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:57:43,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 00:57:43,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17112 trivial. 0 not checked. [2023-11-29 00:57:44,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:57:44,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14955037] [2023-11-29 00:57:44,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:57:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615747249] [2023-11-29 00:57:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615747249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:57:44,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:57:44,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:57:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165297394] [2023-11-29 00:57:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:57:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:57:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:44,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:57:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:57:44,411 INFO L87 Difference]: Start difference. First operand 871472 states and 1535088 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (93), 1 states have call predecessors, (93), 1 states have return successors, (93), 1 states have call predecessors, (93), 1 states have call successors, (93)