./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/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_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/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_023d0344-8ac8-4a03-84e3-a338ec7445b1/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 bec7db2d8bcad481bf37cc90d23f2eda8abfeabb35b205024dfceac80e64e988 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:34:26,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:34:26,754 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:34:26,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:34:26,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:34:26,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:34:26,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:34:26,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:34:26,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:34:26,788 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:34:26,788 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:34:26,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:34:26,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:34:26,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:34:26,791 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:34:26,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:34:26,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:34:26,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:34:26,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:34:26,793 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:34:26,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:34:26,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:34:26,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:34:26,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:34:26,795 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:34:26,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:34:26,796 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:34:26,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:34:26,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:34:26,798 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:34:26,798 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:34:26,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:34:26,799 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:34:26,799 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:34:26,800 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:34:26,800 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:34:26,800 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:34:26,801 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:34:26,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:34:26,801 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:34:26,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:34:26,802 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:34:26,802 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_023d0344-8ac8-4a03-84e3-a338ec7445b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec7db2d8bcad481bf37cc90d23f2eda8abfeabb35b205024dfceac80e64e988 [2023-11-29 01:34:27,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:34:27,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:34:27,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:34:27,037 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:34:27,037 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:34:27,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i [2023-11-29 01:34:29,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:34:29,977 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:34:29,978 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i [2023-11-29 01:34:29,991 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/data/07f0e96f6/9b5a339253ae4995b9c4afc8964bc2dd/FLAG749e9a988 [2023-11-29 01:34:30,007 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/data/07f0e96f6/9b5a339253ae4995b9c4afc8964bc2dd [2023-11-29 01:34:30,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:34:30,011 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:34:30,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:34:30,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:34:30,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:34:30,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48620b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30, skipping insertion in model container [2023-11-29 01:34:30,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,075 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:34:30,201 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_023d0344-8ac8-4a03-84e3-a338ec7445b1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i[916,929] [2023-11-29 01:34:30,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:34:30,345 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:34:30,357 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_023d0344-8ac8-4a03-84e3-a338ec7445b1/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-81.i[916,929] [2023-11-29 01:34:30,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:34:30,442 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:34:30,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30 WrapperNode [2023-11-29 01:34:30,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:34:30,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:34:30,444 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:34:30,444 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:34:30,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,476 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,544 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 501 [2023-11-29 01:34:30,544 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:34:30,545 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:34:30,545 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:34:30,545 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:34:30,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,583 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,609 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 01:34:30,610 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,610 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,627 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,639 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:34:30,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:34:30,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:34:30,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:34:30,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (1/1) ... [2023-11-29 01:34:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:34:30,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:30,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:34:30,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:34:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:34:30,722 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:34:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:34:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:34:30,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:34:30,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:34:30,841 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:34:30,844 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:34:31,454 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:34:31,488 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:34:31,488 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:34:31,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:34:31 BoogieIcfgContainer [2023-11-29 01:34:31,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:34:31,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:34:31,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:34:31,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:34:31,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:34:30" (1/3) ... [2023-11-29 01:34:31,495 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fefb3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:34:31, skipping insertion in model container [2023-11-29 01:34:31,495 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:34:30" (2/3) ... [2023-11-29 01:34:31,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fefb3f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:34:31, skipping insertion in model container [2023-11-29 01:34:31,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:34:31" (3/3) ... [2023-11-29 01:34:31,497 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-81.i [2023-11-29 01:34:31,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:34:31,516 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:34:31,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:34:31,578 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;@3c2f45ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:34:31,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:34:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 125 states have (on average 1.568) internal successors, (196), 126 states have internal predecessors, (196), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-29 01:34:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2023-11-29 01:34:31,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:31,613 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:31,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:31,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:31,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1283820380, now seen corresponding path program 1 times [2023-11-29 01:34:31,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:31,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720684822] [2023-11-29 01:34:31,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720684822] [2023-11-29 01:34:31,949 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:34:31,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912977822] [2023-11-29 01:34:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:31,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:31,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:31,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:31,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:34:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:32,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:34:32,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2023-11-29 01:34:32,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:32,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912977822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:32,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:32,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:34:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104029367] [2023-11-29 01:34:32,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:34:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:34:32,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:34:32,438 INFO L87 Difference]: Start difference. First operand has 208 states, 125 states have (on average 1.568) internal successors, (196), 126 states have internal predecessors, (196), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-29 01:34:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:32,502 INFO L93 Difference]: Finished difference Result 413 states and 790 transitions. [2023-11-29 01:34:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:34:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) Word has length 489 [2023-11-29 01:34:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:32,515 INFO L225 Difference]: With dead ends: 413 [2023-11-29 01:34:32,515 INFO L226 Difference]: Without dead ends: 206 [2023-11-29 01:34:32,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 488 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 01:34:32,525 INFO L413 NwaCegarLoop]: 347 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, 347 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 01:34:32,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 347 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:34:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-29 01:34:32,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-11-29 01:34:32,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 124 states have (on average 1.532258064516129) internal successors, (190), 124 states have internal predecessors, (190), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-29 01:34:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 350 transitions. [2023-11-29 01:34:32,623 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 350 transitions. Word has length 489 [2023-11-29 01:34:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:32,624 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 350 transitions. [2023-11-29 01:34:32,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 47.0) internal successors, (94), 2 states have internal predecessors, (94), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-29 01:34:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 350 transitions. [2023-11-29 01:34:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 01:34:32,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:32,641 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:32,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:34:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:34:32,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:32,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:32,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1735388799, now seen corresponding path program 1 times [2023-11-29 01:34:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:32,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872897499] [2023-11-29 01:34:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:32,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:32,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86038330] [2023-11-29 01:34:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:32,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:32,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:32,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:32,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:34:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:33,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:34:33,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:34:33,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:33,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:33,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872897499] [2023-11-29 01:34:33,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:33,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86038330] [2023-11-29 01:34:33,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86038330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:33,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:33,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:34:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038311146] [2023-11-29 01:34:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:34:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:34:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:34:33,395 INFO L87 Difference]: Start difference. First operand 206 states and 350 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:34:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:33,464 INFO L93 Difference]: Finished difference Result 528 states and 903 transitions. [2023-11-29 01:34:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:34:33,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 490 [2023-11-29 01:34:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:33,472 INFO L225 Difference]: With dead ends: 528 [2023-11-29 01:34:33,473 INFO L226 Difference]: Without dead ends: 323 [2023-11-29 01:34:33,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 01:34:33,475 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 198 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:33,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 682 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:34:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-29 01:34:33,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2023-11-29 01:34:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 211 states have (on average 1.6018957345971565) internal successors, (338), 212 states have internal predecessors, (338), 106 states have call successors, (106), 2 states have call predecessors, (106), 2 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-29 01:34:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 550 transitions. [2023-11-29 01:34:33,532 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 550 transitions. Word has length 490 [2023-11-29 01:34:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:33,534 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 550 transitions. [2023-11-29 01:34:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:34:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 550 transitions. [2023-11-29 01:34:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 01:34:33,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:33,541 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:33,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:34:33,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:33,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:33,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 363581501, now seen corresponding path program 1 times [2023-11-29 01:34:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:33,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598303341] [2023-11-29 01:34:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:33,823 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:33,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438500052] [2023-11-29 01:34:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:33,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:33,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:33,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:34:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:34,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:34:34,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:34:34,221 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:34:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598303341] [2023-11-29 01:34:34,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438500052] [2023-11-29 01:34:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438500052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:34:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:34:34,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:34:34,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251648462] [2023-11-29 01:34:34,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:34:34,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:34:34,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:34,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:34:34,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:34:34,226 INFO L87 Difference]: Start difference. First operand 320 states and 550 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:34:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:34,296 INFO L93 Difference]: Finished difference Result 952 states and 1636 transitions. [2023-11-29 01:34:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:34:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 490 [2023-11-29 01:34:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:34,306 INFO L225 Difference]: With dead ends: 952 [2023-11-29 01:34:34,306 INFO L226 Difference]: Without dead ends: 633 [2023-11-29 01:34:34,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 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 01:34:34,309 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 333 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 684 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:34:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2023-11-29 01:34:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2023-11-29 01:34:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 414 states have (on average 1.5893719806763285) internal successors, (658), 416 states have internal predecessors, (658), 212 states have call successors, (212), 4 states have call predecessors, (212), 4 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-29 01:34:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1082 transitions. [2023-11-29 01:34:34,403 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1082 transitions. Word has length 490 [2023-11-29 01:34:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:34,405 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1082 transitions. [2023-11-29 01:34:34,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:34:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1082 transitions. [2023-11-29 01:34:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 01:34:34,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:34,411 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:34,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:34:34,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:34,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:34,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1630563205, now seen corresponding path program 1 times [2023-11-29 01:34:34,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:34,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276256515] [2023-11-29 01:34:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:34,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:34,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43964504] [2023-11-29 01:34:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:34,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:34,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:34:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:34,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:34:34,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 5343 proven. 69 refuted. 0 times theorem prover too weak. 7228 trivial. 0 not checked. [2023-11-29 01:34:35,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 168 proven. 69 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:34:35,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:35,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276256515] [2023-11-29 01:34:35,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:35,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43964504] [2023-11-29 01:34:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43964504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:35,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:35,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:34:35,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171985127] [2023-11-29 01:34:35,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:34:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:34:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:34:35,707 INFO L87 Difference]: Start difference. First operand 631 states and 1082 transitions. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-29 01:34:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:36,485 INFO L93 Difference]: Finished difference Result 1277 states and 2177 transitions. [2023-11-29 01:34:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:34:36,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) Word has length 490 [2023-11-29 01:34:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:36,492 INFO L225 Difference]: With dead ends: 1277 [2023-11-29 01:34:36,493 INFO L226 Difference]: Without dead ends: 647 [2023-11-29 01:34:36,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:34:36,497 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 508 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:36,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 976 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:34:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2023-11-29 01:34:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 639. [2023-11-29 01:34:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 420 states have (on average 1.5714285714285714) internal successors, (660), 422 states have internal predecessors, (660), 212 states have call successors, (212), 6 states have call predecessors, (212), 6 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-29 01:34:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1084 transitions. [2023-11-29 01:34:36,584 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1084 transitions. Word has length 490 [2023-11-29 01:34:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:36,586 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 1084 transitions. [2023-11-29 01:34:36,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 3 states have call successors, (103), 2 states have call predecessors, (103), 4 states have return successors, (104), 3 states have call predecessors, (104), 3 states have call successors, (104) [2023-11-29 01:34:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1084 transitions. [2023-11-29 01:34:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 01:34:36,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:36,591 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:36,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:34:36,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:36,799 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:36,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:36,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1357402078, now seen corresponding path program 1 times [2023-11-29 01:34:36,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:36,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373344173] [2023-11-29 01:34:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:36,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:36,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:36,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697862860] [2023-11-29 01:34:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:36,850 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:36,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:34:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:37,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:34:37,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:37,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 5893 proven. 84 refuted. 0 times theorem prover too weak. 6663 trivial. 0 not checked. [2023-11-29 01:34:37,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 153 proven. 84 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:34:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373344173] [2023-11-29 01:34:37,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697862860] [2023-11-29 01:34:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697862860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:37,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:37,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:34:37,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174246881] [2023-11-29 01:34:37,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:37,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:34:37,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:37,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:34:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:34:37,778 INFO L87 Difference]: Start difference. First operand 639 states and 1084 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 01:34:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:38,274 INFO L93 Difference]: Finished difference Result 1297 states and 2185 transitions. [2023-11-29 01:34:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:34:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) Word has length 491 [2023-11-29 01:34:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:38,280 INFO L225 Difference]: With dead ends: 1297 [2023-11-29 01:34:38,280 INFO L226 Difference]: Without dead ends: 659 [2023-11-29 01:34:38,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 974 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:34:38,283 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 489 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:38,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 606 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:34:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-11-29 01:34:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 647. [2023-11-29 01:34:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 426 states have (on average 1.5446009389671362) internal successors, (658), 428 states have internal predecessors, (658), 212 states have call successors, (212), 8 states have call predecessors, (212), 8 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-29 01:34:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1082 transitions. [2023-11-29 01:34:38,343 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1082 transitions. Word has length 491 [2023-11-29 01:34:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:38,344 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 1082 transitions. [2023-11-29 01:34:38,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 01:34:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1082 transitions. [2023-11-29 01:34:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 01:34:38,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:38,374 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:38,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:34:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:38,574 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:38,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1265684706, now seen corresponding path program 1 times [2023-11-29 01:34:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:38,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438819102] [2023-11-29 01:34:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:38,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:38,619 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:38,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453086732] [2023-11-29 01:34:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:38,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:38,620 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:38,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:34:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:38,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:34:38,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2662 proven. 441 refuted. 0 times theorem prover too weak. 9537 trivial. 0 not checked. [2023-11-29 01:34:40,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 27 proven. 444 refuted. 0 times theorem prover too weak. 12169 trivial. 0 not checked. [2023-11-29 01:34:41,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438819102] [2023-11-29 01:34:41,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:41,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453086732] [2023-11-29 01:34:41,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453086732] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:41,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:41,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 01:34:41,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17461747] [2023-11-29 01:34:41,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:34:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:34:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:34:41,160 INFO L87 Difference]: Start difference. First operand 647 states and 1082 transitions. Second operand has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (159), 3 states have call predecessors, (159), 7 states have return successors, (160), 4 states have call predecessors, (160), 5 states have call successors, (160) [2023-11-29 01:34:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:42,397 INFO L93 Difference]: Finished difference Result 1661 states and 2653 transitions. [2023-11-29 01:34:42,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 01:34:42,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (159), 3 states have call predecessors, (159), 7 states have return successors, (160), 4 states have call predecessors, (160), 5 states have call successors, (160) Word has length 491 [2023-11-29 01:34:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:42,406 INFO L225 Difference]: With dead ends: 1661 [2023-11-29 01:34:42,407 INFO L226 Difference]: Without dead ends: 1015 [2023-11-29 01:34:42,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 969 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:34:42,411 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 478 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:42,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1134 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:34:42,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2023-11-29 01:34:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 835. [2023-11-29 01:34:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 558 states have (on average 1.4587813620071686) internal successors, (814), 564 states have internal predecessors, (814), 252 states have call successors, (252), 24 states have call predecessors, (252), 24 states have return successors, (252), 246 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-29 01:34:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1318 transitions. [2023-11-29 01:34:42,544 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1318 transitions. Word has length 491 [2023-11-29 01:34:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:42,545 INFO L495 AbstractCegarLoop]: Abstraction has 835 states and 1318 transitions. [2023-11-29 01:34:42,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 12.1875) internal successors, (195), 16 states have internal predecessors, (195), 5 states have call successors, (159), 3 states have call predecessors, (159), 7 states have return successors, (160), 4 states have call predecessors, (160), 5 states have call successors, (160) [2023-11-29 01:34:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1318 transitions. [2023-11-29 01:34:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 01:34:42,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:42,551 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:42,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 01:34:42,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:34:42,753 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:42,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:42,753 INFO L85 PathProgramCache]: Analyzing trace with hash -924818101, now seen corresponding path program 1 times [2023-11-29 01:34:42,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255404633] [2023-11-29 01:34:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:42,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256373176] [2023-11-29 01:34:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:42,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:42,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:42,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:42,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:34:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:43,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:34:43,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2189 proven. 444 refuted. 0 times theorem prover too weak. 10007 trivial. 0 not checked. [2023-11-29 01:34:44,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 24 proven. 213 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:34:44,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:44,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255404633] [2023-11-29 01:34:44,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:44,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256373176] [2023-11-29 01:34:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256373176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:44,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:44,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-29 01:34:44,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449341515] [2023-11-29 01:34:44,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:44,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 01:34:44,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:44,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 01:34:44,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:34:44,985 INFO L87 Difference]: Start difference. First operand 835 states and 1318 transitions. Second operand has 17 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 4 states have call successors, (158), 3 states have call predecessors, (158), 6 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) [2023-11-29 01:34:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:47,993 INFO L93 Difference]: Finished difference Result 2877 states and 4433 transitions. [2023-11-29 01:34:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 01:34:47,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 4 states have call successors, (158), 3 states have call predecessors, (158), 6 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) Word has length 492 [2023-11-29 01:34:47,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:48,007 INFO L225 Difference]: With dead ends: 2877 [2023-11-29 01:34:48,007 INFO L226 Difference]: Without dead ends: 2043 [2023-11-29 01:34:48,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 01:34:48,011 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 1205 mSDsluCounter, 2955 mSDsCounter, 0 mSdLazyCounter, 2928 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 3431 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:48,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1207 Valid, 3431 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2928 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 01:34:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2023-11-29 01:34:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1287. [2023-11-29 01:34:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 832 states have (on average 1.3125) internal successors, (1092), 843 states have internal predecessors, (1092), 376 states have call successors, (376), 78 states have call predecessors, (376), 78 states have return successors, (376), 365 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:34:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1844 transitions. [2023-11-29 01:34:48,288 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1844 transitions. Word has length 492 [2023-11-29 01:34:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:48,289 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1844 transitions. [2023-11-29 01:34:48,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.470588235294118) internal successors, (195), 17 states have internal predecessors, (195), 4 states have call successors, (158), 3 states have call predecessors, (158), 6 states have return successors, (159), 4 states have call predecessors, (159), 4 states have call successors, (159) [2023-11-29 01:34:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1844 transitions. [2023-11-29 01:34:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:34:48,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:48,296 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:48,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:34:48,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 01:34:48,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:48,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1203049761, now seen corresponding path program 1 times [2023-11-29 01:34:48,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:48,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841106455] [2023-11-29 01:34:48,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:48,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798848132] [2023-11-29 01:34:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:48,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:48,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:48,551 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:48,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:34:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:48,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:34:48,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 79 proven. 237 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:34:50,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:34:51,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841106455] [2023-11-29 01:34:51,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:51,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798848132] [2023-11-29 01:34:51,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798848132] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:34:51,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:34:51,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 01:34:51,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249914779] [2023-11-29 01:34:51,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:51,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:34:51,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:34:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:34:51,102 INFO L87 Difference]: Start difference. First operand 1287 states and 1844 transitions. Second operand has 16 states, 15 states have (on average 12.266666666666667) internal successors, (184), 16 states have internal predecessors, (184), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:34:53,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:53,807 INFO L93 Difference]: Finished difference Result 3407 states and 5014 transitions. [2023-11-29 01:34:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 01:34:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 12.266666666666667) internal successors, (184), 16 states have internal predecessors, (184), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) Word has length 493 [2023-11-29 01:34:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:53,830 INFO L225 Difference]: With dead ends: 3407 [2023-11-29 01:34:53,830 INFO L226 Difference]: Without dead ends: 2285 [2023-11-29 01:34:53,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 976 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 01:34:53,834 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 1628 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 3127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:53,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 2196 Invalid, 3127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:34:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2023-11-29 01:34:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1287. [2023-11-29 01:34:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 832 states have (on average 1.3028846153846154) internal successors, (1084), 843 states have internal predecessors, (1084), 376 states have call successors, (376), 78 states have call predecessors, (376), 78 states have return successors, (376), 365 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:34:54,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1836 transitions. [2023-11-29 01:34:54,087 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1836 transitions. Word has length 493 [2023-11-29 01:34:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:54,088 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 1836 transitions. [2023-11-29 01:34:54,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 12.266666666666667) internal successors, (184), 16 states have internal predecessors, (184), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:34:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1836 transitions. [2023-11-29 01:34:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:34:54,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:54,092 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:54,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:34:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 01:34:54,293 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:54,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1812053857, now seen corresponding path program 1 times [2023-11-29 01:34:54,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:54,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489803763] [2023-11-29 01:34:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:54,343 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:54,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288601119] [2023-11-29 01:34:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:54,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:54,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:54,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:34:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:54,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 01:34:54,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 160 proven. 468 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 01:35:09,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:35:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489803763] [2023-11-29 01:35:16,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:16,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288601119] [2023-11-29 01:35:16,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288601119] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:16,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:35:16,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-29 01:35:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242967182] [2023-11-29 01:35:16,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:16,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:35:16,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:35:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:35:16,208 INFO L87 Difference]: Start difference. First operand 1287 states and 1836 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:17,698 INFO L93 Difference]: Finished difference Result 2673 states and 3769 transitions. [2023-11-29 01:35:17,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:35:17,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:35:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:17,707 INFO L225 Difference]: With dead ends: 2673 [2023-11-29 01:35:17,707 INFO L226 Difference]: Without dead ends: 1551 [2023-11-29 01:35:17,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 963 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-29 01:35:17,710 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 176 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:17,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1600 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:35:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2023-11-29 01:35:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1335. [2023-11-29 01:35:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 880 states have (on average 1.3045454545454545) internal successors, (1148), 891 states have internal predecessors, (1148), 376 states have call successors, (376), 78 states have call predecessors, (376), 78 states have return successors, (376), 365 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:35:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1900 transitions. [2023-11-29 01:35:17,944 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1900 transitions. Word has length 493 [2023-11-29 01:35:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:17,945 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1900 transitions. [2023-11-29 01:35:17,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:17,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1900 transitions. [2023-11-29 01:35:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:35:17,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:17,949 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:17,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:35:18,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:18,150 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:18,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:18,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1781848861, now seen corresponding path program 1 times [2023-11-29 01:35:18,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:18,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721101973] [2023-11-29 01:35:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:18,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:18,201 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:18,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097852967] [2023-11-29 01:35:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:18,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:18,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:18,203 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:18,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:35:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:18,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:35:18,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:35:18,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721101973] [2023-11-29 01:35:18,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:18,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097852967] [2023-11-29 01:35:18,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097852967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:18,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:35:18,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322240411] [2023-11-29 01:35:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:18,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:35:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:35:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:35:18,526 INFO L87 Difference]: Start difference. First operand 1335 states and 1900 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:18,861 INFO L93 Difference]: Finished difference Result 2887 states and 4001 transitions. [2023-11-29 01:35:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:35:18,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:35:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:18,874 INFO L225 Difference]: With dead ends: 2887 [2023-11-29 01:35:18,874 INFO L226 Difference]: Without dead ends: 1717 [2023-11-29 01:35:18,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 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 01:35:18,878 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 26 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:18,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 680 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:35:18,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-29 01:35:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1703. [2023-11-29 01:35:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1163 states have (on average 1.2579535683576957) internal successors, (1463), 1186 states have internal predecessors, (1463), 424 states have call successors, (424), 115 states have call predecessors, (424), 115 states have return successors, (424), 401 states have call predecessors, (424), 424 states have call successors, (424) [2023-11-29 01:35:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2311 transitions. [2023-11-29 01:35:19,284 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2311 transitions. Word has length 493 [2023-11-29 01:35:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:19,285 INFO L495 AbstractCegarLoop]: Abstraction has 1703 states and 2311 transitions. [2023-11-29 01:35:19,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2311 transitions. [2023-11-29 01:35:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:35:19,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:19,290 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:19,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:35:19,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:19,491 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:19,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1839107163, now seen corresponding path program 1 times [2023-11-29 01:35:19,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:19,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354980482] [2023-11-29 01:35:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:19,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:19,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:19,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432324563] [2023-11-29 01:35:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:19,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:19,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:19,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:19,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:35:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:19,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:35:19,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:35:19,833 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:35:19,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:19,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354980482] [2023-11-29 01:35:19,834 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:19,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432324563] [2023-11-29 01:35:19,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432324563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:35:19,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:35:19,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:35:19,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195620832] [2023-11-29 01:35:19,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:19,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:35:19,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:19,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:35:19,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:35:19,837 INFO L87 Difference]: Start difference. First operand 1703 states and 2311 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:20,211 INFO L93 Difference]: Finished difference Result 3299 states and 4441 transitions. [2023-11-29 01:35:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:35:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:35:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:20,220 INFO L225 Difference]: With dead ends: 3299 [2023-11-29 01:35:20,220 INFO L226 Difference]: Without dead ends: 1765 [2023-11-29 01:35:20,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 01:35:20,225 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 65 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:20,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 993 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:35:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2023-11-29 01:35:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1443. [2023-11-29 01:35:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 975 states have (on average 1.2625641025641026) internal successors, (1231), 986 states have internal predecessors, (1231), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 365 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:35:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1983 transitions. [2023-11-29 01:35:20,447 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1983 transitions. Word has length 493 [2023-11-29 01:35:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:20,448 INFO L495 AbstractCegarLoop]: Abstraction has 1443 states and 1983 transitions. [2023-11-29 01:35:20,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:35:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1983 transitions. [2023-11-29 01:35:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:35:20,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:20,454 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:20,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:35:20,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:20,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:20,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:20,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2070219295, now seen corresponding path program 1 times [2023-11-29 01:35:20,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:20,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641290221] [2023-11-29 01:35:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:20,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:20,712 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:20,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485840302] [2023-11-29 01:35:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:20,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:20,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:20,714 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:20,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:35:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:21,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 01:35:21,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2763 proven. 1746 refuted. 0 times theorem prover too weak. 8131 trivial. 0 not checked. [2023-11-29 01:35:47,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:56,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:35:56,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:56,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641290221] [2023-11-29 01:35:56,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:56,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485840302] [2023-11-29 01:35:56,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485840302] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:56,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:35:56,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [38] total 46 [2023-11-29 01:35:56,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920757253] [2023-11-29 01:35:56,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:35:56,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:35:56,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:35:56,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1646, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 01:35:56,015 INFO L87 Difference]: Start difference. First operand 1443 states and 1983 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:03,711 INFO L93 Difference]: Finished difference Result 2929 states and 3972 transitions. [2023-11-29 01:36:03,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:36:03,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:36:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:03,720 INFO L225 Difference]: With dead ends: 2929 [2023-11-29 01:36:03,720 INFO L226 Difference]: Without dead ends: 1655 [2023-11-29 01:36:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 940 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=560, Invalid=2632, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 01:36:03,725 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 188 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1937 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 01:36:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2023-11-29 01:36:04,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1451. [2023-11-29 01:36:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 983 states have (on average 1.2685656154628688) internal successors, (1247), 994 states have internal predecessors, (1247), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 365 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1999 transitions. [2023-11-29 01:36:04,098 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1999 transitions. Word has length 493 [2023-11-29 01:36:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:04,099 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1999 transitions. [2023-11-29 01:36:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1999 transitions. [2023-11-29 01:36:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:36:04,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:04,105 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:04,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:36:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:04,306 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:04,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1225247843, now seen corresponding path program 1 times [2023-11-29 01:36:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459356391] [2023-11-29 01:36:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:04,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:04,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941109545] [2023-11-29 01:36:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:04,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:04,348 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:04,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:36:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:04,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:36:04,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:06,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 79 proven. 237 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:36:06,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:36:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:08,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459356391] [2023-11-29 01:36:08,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:08,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941109545] [2023-11-29 01:36:08,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941109545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:08,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:36:08,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 01:36:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131629887] [2023-11-29 01:36:08,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:08,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:36:08,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:36:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 01:36:08,548 INFO L87 Difference]: Start difference. First operand 1451 states and 1999 transitions. Second operand has 18 states, 17 states have (on average 10.941176470588236) internal successors, (186), 18 states have internal predecessors, (186), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:36:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:11,048 INFO L93 Difference]: Finished difference Result 3249 states and 4475 transitions. [2023-11-29 01:36:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 01:36:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 10.941176470588236) internal successors, (186), 18 states have internal predecessors, (186), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) Word has length 493 [2023-11-29 01:36:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:11,060 INFO L225 Difference]: With dead ends: 3249 [2023-11-29 01:36:11,061 INFO L226 Difference]: Without dead ends: 1967 [2023-11-29 01:36:11,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 970 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:36:11,065 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 1146 mSDsluCounter, 1891 mSDsCounter, 0 mSdLazyCounter, 2074 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1225 SdHoareTripleChecker+Valid, 2145 SdHoareTripleChecker+Invalid, 2697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 2074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:11,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1225 Valid, 2145 Invalid, 2697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 2074 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:36:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2023-11-29 01:36:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1643. [2023-11-29 01:36:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1175 states have (on average 1.334468085106383) internal successors, (1568), 1185 states have internal predecessors, (1568), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2320 transitions. [2023-11-29 01:36:11,504 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2320 transitions. Word has length 493 [2023-11-29 01:36:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:11,505 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 2320 transitions. [2023-11-29 01:36:11,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 10.941176470588236) internal successors, (186), 18 states have internal predecessors, (186), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:36:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2320 transitions. [2023-11-29 01:36:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:36:11,510 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:11,511 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:11,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:36:11,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:11,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:11,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1267866750, now seen corresponding path program 1 times [2023-11-29 01:36:11,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:11,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439792926] [2023-11-29 01:36:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:11,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:11,758 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155859015] [2023-11-29 01:36:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:11,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:11,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:11,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:36:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:12,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:36:12,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:36:12,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:36:12,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439792926] [2023-11-29 01:36:12,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:12,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155859015] [2023-11-29 01:36:12,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155859015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:36:12,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:36:12,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:36:12,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775611537] [2023-11-29 01:36:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:36:12,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:36:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:36:12,039 INFO L87 Difference]: Start difference. First operand 1643 states and 2320 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:12,442 INFO L93 Difference]: Finished difference Result 3007 states and 4170 transitions. [2023-11-29 01:36:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:36:12,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:36:12,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:12,452 INFO L225 Difference]: With dead ends: 3007 [2023-11-29 01:36:12,452 INFO L226 Difference]: Without dead ends: 1725 [2023-11-29 01:36:12,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 01:36:12,455 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 53 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:12,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 982 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:36:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2023-11-29 01:36:12,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1615. [2023-11-29 01:36:12,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1147 states have (on average 1.3356582388840454) internal successors, (1532), 1157 states have internal predecessors, (1532), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2284 transitions. [2023-11-29 01:36:12,814 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2284 transitions. Word has length 493 [2023-11-29 01:36:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:12,814 INFO L495 AbstractCegarLoop]: Abstraction has 1615 states and 2284 transitions. [2023-11-29 01:36:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2284 transitions. [2023-11-29 01:36:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:36:12,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:12,820 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:12,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:36:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:36:13,021 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:13,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash 817581438, now seen corresponding path program 1 times [2023-11-29 01:36:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:13,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740293171] [2023-11-29 01:36:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:13,060 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:13,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526930107] [2023-11-29 01:36:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:13,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:13,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:13,062 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:13,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:36:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:13,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 01:36:13,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:17,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2467 proven. 669 refuted. 0 times theorem prover too weak. 9504 trivial. 0 not checked. [2023-11-29 01:36:17,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:36:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:24,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740293171] [2023-11-29 01:36:24,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:24,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526930107] [2023-11-29 01:36:24,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526930107] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:24,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:36:24,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 01:36:24,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265088251] [2023-11-29 01:36:24,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:36:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:24,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:36:24,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:36:24,837 INFO L87 Difference]: Start difference. First operand 1615 states and 2284 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:26,656 INFO L93 Difference]: Finished difference Result 3007 states and 4184 transitions. [2023-11-29 01:36:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:36:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:36:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:26,667 INFO L225 Difference]: With dead ends: 3007 [2023-11-29 01:36:26,668 INFO L226 Difference]: Without dead ends: 1753 [2023-11-29 01:36:26,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:36:26,672 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 169 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:26,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1618 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:36:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2023-11-29 01:36:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1647. [2023-11-29 01:36:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1179 states have (on average 1.3333333333333333) internal successors, (1572), 1189 states have internal predecessors, (1572), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2324 transitions. [2023-11-29 01:36:27,007 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2324 transitions. Word has length 493 [2023-11-29 01:36:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:27,008 INFO L495 AbstractCegarLoop]: Abstraction has 1647 states and 2324 transitions. [2023-11-29 01:36:27,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2324 transitions. [2023-11-29 01:36:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 01:36:27,011 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:27,011 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:27,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:27,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:27,212 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:27,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1518646016, now seen corresponding path program 1 times [2023-11-29 01:36:27,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:27,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448254190] [2023-11-29 01:36:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:27,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:27,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488860396] [2023-11-29 01:36:27,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:27,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:27,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:27,258 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:36:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:27,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 01:36:27,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2467 proven. 669 refuted. 0 times theorem prover too weak. 9504 trivial. 0 not checked. [2023-11-29 01:36:31,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:36:37,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:37,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448254190] [2023-11-29 01:36:37,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:37,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488860396] [2023-11-29 01:36:37,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488860396] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:37,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:36:37,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 01:36:37,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883589188] [2023-11-29 01:36:37,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:37,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:36:37,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:36:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:36:37,765 INFO L87 Difference]: Start difference. First operand 1647 states and 2324 transitions. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:39,483 INFO L93 Difference]: Finished difference Result 3039 states and 4220 transitions. [2023-11-29 01:36:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:36:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 493 [2023-11-29 01:36:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:39,491 INFO L225 Difference]: With dead ends: 3039 [2023-11-29 01:36:39,491 INFO L226 Difference]: Without dead ends: 1753 [2023-11-29 01:36:39,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 960 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 01:36:39,494 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 178 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:39,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1595 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:36:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2023-11-29 01:36:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1647. [2023-11-29 01:36:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1179 states have (on average 1.3333333333333333) internal successors, (1572), 1189 states have internal predecessors, (1572), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2324 transitions. [2023-11-29 01:36:39,793 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2324 transitions. Word has length 493 [2023-11-29 01:36:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:39,793 INFO L495 AbstractCegarLoop]: Abstraction has 1647 states and 2324 transitions. [2023-11-29 01:36:39,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2324 transitions. [2023-11-29 01:36:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 01:36:39,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:39,797 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:39,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 01:36:39,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:39,997 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:39,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash -114950063, now seen corresponding path program 1 times [2023-11-29 01:36:39,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:39,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211251907] [2023-11-29 01:36:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:39,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:40,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:40,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285598273] [2023-11-29 01:36:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:40,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:40,033 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:40,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:36:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:40,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 01:36:40,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:36:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 160 proven. 468 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 01:36:50,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:36:56,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:56,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211251907] [2023-11-29 01:36:56,180 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285598273] [2023-11-29 01:36:56,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285598273] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:36:56,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:36:56,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 01:36:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030629733] [2023-11-29 01:36:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:36:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:36:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:36:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:36:56,183 INFO L87 Difference]: Start difference. First operand 1647 states and 2324 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:57,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:36:57,704 INFO L93 Difference]: Finished difference Result 3113 states and 4301 transitions. [2023-11-29 01:36:57,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:36:57,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 494 [2023-11-29 01:36:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:36:57,712 INFO L225 Difference]: With dead ends: 3113 [2023-11-29 01:36:57,712 INFO L226 Difference]: Without dead ends: 1827 [2023-11-29 01:36:57,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:36:57,715 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 152 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:36:57,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1666 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:36:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-11-29 01:36:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1679. [2023-11-29 01:36:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1211 states have (on average 1.3278282411230389) internal successors, (1608), 1221 states have internal predecessors, (1608), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:36:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 2360 transitions. [2023-11-29 01:36:58,011 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 2360 transitions. Word has length 494 [2023-11-29 01:36:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:36:58,012 INFO L495 AbstractCegarLoop]: Abstraction has 1679 states and 2360 transitions. [2023-11-29 01:36:58,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:36:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 2360 transitions. [2023-11-29 01:36:58,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 01:36:58,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:36:58,015 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:36:58,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:36:58,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:36:58,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:36:58,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:36:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash 143215375, now seen corresponding path program 1 times [2023-11-29 01:36:58,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:36:58,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323160472] [2023-11-29 01:36:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:36:58,250 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:36:58,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1499819932] [2023-11-29 01:36:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:36:58,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:36:58,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:36:58,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:36:58,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:36:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:36:58,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 01:36:58,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 160 proven. 468 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 01:37:08,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:37:14,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323160472] [2023-11-29 01:37:14,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:14,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499819932] [2023-11-29 01:37:14,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499819932] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:14,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:37:14,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 01:37:14,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477779392] [2023-11-29 01:37:14,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:37:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:14,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:37:14,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:37:14,216 INFO L87 Difference]: Start difference. First operand 1679 states and 2360 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:37:15,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:15,776 INFO L93 Difference]: Finished difference Result 3145 states and 4333 transitions. [2023-11-29 01:37:15,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 01:37:15,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 494 [2023-11-29 01:37:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:15,787 INFO L225 Difference]: With dead ends: 3145 [2023-11-29 01:37:15,787 INFO L226 Difference]: Without dead ends: 1827 [2023-11-29 01:37:15,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 01:37:15,791 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 134 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:15,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1665 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:37:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-11-29 01:37:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1667. [2023-11-29 01:37:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1199 states have (on average 1.3277731442869058) internal successors, (1592), 1209 states have internal predecessors, (1592), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:37:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2344 transitions. [2023-11-29 01:37:16,093 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2344 transitions. Word has length 494 [2023-11-29 01:37:16,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:16,094 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2344 transitions. [2023-11-29 01:37:16,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:37:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2344 transitions. [2023-11-29 01:37:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 01:37:16,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:16,097 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:16,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 01:37:16,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:37:16,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:16,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:16,299 INFO L85 PathProgramCache]: Analyzing trace with hash 262312015, now seen corresponding path program 1 times [2023-11-29 01:37:16,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:16,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688745956] [2023-11-29 01:37:16,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:16,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:16,332 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:16,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390934489] [2023-11-29 01:37:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:16,333 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:16,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:37:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:16,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 01:37:16,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 160 proven. 468 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 01:37:29,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:37:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688745956] [2023-11-29 01:37:36,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390934489] [2023-11-29 01:37:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390934489] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 01:37:36,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:37:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 01:37:36,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439465574] [2023-11-29 01:37:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:37:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:37:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:37:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-11-29 01:37:36,832 INFO L87 Difference]: Start difference. First operand 1667 states and 2344 transitions. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:37:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:37,919 INFO L93 Difference]: Finished difference Result 3135 states and 4312 transitions. [2023-11-29 01:37:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:37:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 494 [2023-11-29 01:37:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:37,927 INFO L225 Difference]: With dead ends: 3135 [2023-11-29 01:37:37,927 INFO L226 Difference]: Without dead ends: 1829 [2023-11-29 01:37:37,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-29 01:37:37,930 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 112 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:37,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1583 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:37:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2023-11-29 01:37:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1667. [2023-11-29 01:37:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1199 states have (on average 1.3277731442869058) internal successors, (1592), 1209 states have internal predecessors, (1592), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:37:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2344 transitions. [2023-11-29 01:37:38,225 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2344 transitions. Word has length 494 [2023-11-29 01:37:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:38,226 INFO L495 AbstractCegarLoop]: Abstraction has 1667 states and 2344 transitions. [2023-11-29 01:37:38,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:37:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2344 transitions. [2023-11-29 01:37:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 01:37:38,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:38,229 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:38,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:37:38,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:38,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:38,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash 906118291, now seen corresponding path program 1 times [2023-11-29 01:37:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:38,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410371114] [2023-11-29 01:37:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:38,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:38,468 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:38,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99828055] [2023-11-29 01:37:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:38,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:38,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:38,470 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:38,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:37:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:38,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:37:38,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:37:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 79 proven. 237 refuted. 0 times theorem prover too weak. 12324 trivial. 0 not checked. [2023-11-29 01:37:39,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:37:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 01:37:40,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:37:40,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410371114] [2023-11-29 01:37:40,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:37:40,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99828055] [2023-11-29 01:37:40,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99828055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:37:40,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:37:40,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 01:37:40,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381092625] [2023-11-29 01:37:40,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:37:40,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:37:40,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:37:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:37:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:37:40,436 INFO L87 Difference]: Start difference. First operand 1667 states and 2344 transitions. Second operand has 15 states, 14 states have (on average 13.214285714285714) internal successors, (185), 15 states have internal predecessors, (185), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:37:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:37:42,329 INFO L93 Difference]: Finished difference Result 3337 states and 4537 transitions. [2023-11-29 01:37:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 01:37:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 13.214285714285714) internal successors, (185), 15 states have internal predecessors, (185), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) Word has length 494 [2023-11-29 01:37:42,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:37:42,336 INFO L225 Difference]: With dead ends: 3337 [2023-11-29 01:37:42,336 INFO L226 Difference]: Without dead ends: 2031 [2023-11-29 01:37:42,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 975 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-29 01:37:42,339 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 1150 mSDsluCounter, 1629 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:37:42,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1895 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 01:37:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2023-11-29 01:37:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1655. [2023-11-29 01:37:42,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1187 states have (on average 1.3310867733782645) internal successors, (1580), 1197 states have internal predecessors, (1580), 376 states have call successors, (376), 91 states have call predecessors, (376), 91 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:37:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 2332 transitions. [2023-11-29 01:37:42,659 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 2332 transitions. Word has length 494 [2023-11-29 01:37:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:37:42,660 INFO L495 AbstractCegarLoop]: Abstraction has 1655 states and 2332 transitions. [2023-11-29 01:37:42,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 13.214285714285714) internal successors, (185), 15 states have internal predecessors, (185), 4 states have call successors, (160), 3 states have call predecessors, (160), 4 states have return successors, (160), 2 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 01:37:42,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 2332 transitions. [2023-11-29 01:37:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 01:37:42,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:37:42,663 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:37:42,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:37:42,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:42,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:37:42,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:37:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -871611165, now seen corresponding path program 1 times [2023-11-29 01:37:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:37:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649244789] [2023-11-29 01:37:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:42,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:37:42,897 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:37:42,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912141026] [2023-11-29 01:37:42,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:37:42,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:37:42,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:37:42,899 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:37:42,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:37:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:37:43,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 01:37:43,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:38:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 01:38:01,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:38:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:38:01,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649244789] [2023-11-29 01:38:01,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:38:01,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912141026] [2023-11-29 01:38:01,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912141026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:38:01,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:38:01,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 01:38:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371325418] [2023-11-29 01:38:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:38:01,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:38:01,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:38:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:38:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:38:01,735 INFO L87 Difference]: Start difference. First operand 1655 states and 2332 transitions. Second operand has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:38:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:38:02,379 INFO L93 Difference]: Finished difference Result 1823 states and 2518 transitions. [2023-11-29 01:38:02,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:38:02,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 495 [2023-11-29 01:38:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:38:02,385 INFO L225 Difference]: With dead ends: 1823 [2023-11-29 01:38:02,385 INFO L226 Difference]: Without dead ends: 1821 [2023-11-29 01:38:02,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:38:02,386 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 90 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:38:02,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 1127 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:38:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2023-11-29 01:38:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1679. [2023-11-29 01:38:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1207 states have (on average 1.3256006628003314) internal successors, (1600), 1217 states have internal predecessors, (1600), 376 states have call successors, (376), 95 states have call predecessors, (376), 95 states have return successors, (376), 366 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 01:38:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 2352 transitions. [2023-11-29 01:38:02,724 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 2352 transitions. Word has length 495 [2023-11-29 01:38:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:38:02,725 INFO L495 AbstractCegarLoop]: Abstraction has 1679 states and 2352 transitions. [2023-11-29 01:38:02,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 01:38:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 2352 transitions. [2023-11-29 01:38:02,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 01:38:02,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:38:02,728 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:02,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:38:02,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:02,929 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:38:02,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:38:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1556905649, now seen corresponding path program 1 times [2023-11-29 01:38:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:38:02,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535448954] [2023-11-29 01:38:02,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:02,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:38:02,963 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:38:02,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282322344] [2023-11-29 01:38:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:38:02,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:38:02,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:38:02,964 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:38:02,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_023d0344-8ac8-4a03-84e3-a338ec7445b1/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:38:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:38:03,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 01:38:03,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2367 proven. 213 refuted. 0 times theorem prover too weak. 10060 trivial. 0 not checked. [2023-11-29 01:39:38,683 INFO L327 TraceCheckSpWp]: Computing backward predicates...