./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:33:34,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:33:34,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:33:34,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:33:34,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:33:34,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:33:34,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:33:34,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:33:34,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:33:34,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:33:34,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:33:34,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:33:34,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:33:34,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:33:34,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:33:34,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:33:34,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:33:34,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:33:34,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:33:34,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:33:34,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:33:34,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:33:34,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:33:34,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:33:34,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:33:34,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:33:34,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:33:34,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:33:34,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:33:34,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:33:34,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:33:34,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:33:34,834 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:33:34,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:33:34,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:33:34,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:33:34,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:33:34,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:33:34,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:33:34,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:33:34,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:33:34,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-19 05:33:34,891 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:33:34,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:33:34,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:33:34,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:33:34,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:33:34,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:33:34,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:33:34,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:33:34,901 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:33:34,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:33:34,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:33:34,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:33:34,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:33:34,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:33:34,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:33:34,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:33:34,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:33:34,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:33:34,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:33:34,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:33:34,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:33:34,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:34,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:33:34,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:33:34,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:33:34,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:33:34,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:33:34,906 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:33:34,907 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:33:34,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:33:34,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:33:34,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2021-11-19 05:33:35,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:33:35,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:33:35,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:33:35,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:33:35,245 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:33:35,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-19 05:33:35,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/data/f5a06968a/2df853329594495fade0d5c4f864c979/FLAG7776d83b9 [2021-11-19 05:33:36,361 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:33:36,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-19 05:33:36,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/data/f5a06968a/2df853329594495fade0d5c4f864c979/FLAG7776d83b9 [2021-11-19 05:33:36,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/data/f5a06968a/2df853329594495fade0d5c4f864c979 [2021-11-19 05:33:36,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:33:36,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:33:36,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:36,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:33:36,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:33:36,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:36" (1/1) ... [2021-11-19 05:33:36,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561f0538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:36, skipping insertion in model container [2021-11-19 05:33:36,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:33:36" (1/1) ... [2021-11-19 05:33:36,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:33:36,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:33:38,425 WARN L230 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_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-19 05:33:38,497 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:38,522 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:33:39,019 WARN L230 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_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-19 05:33:39,039 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:33:39,110 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:33:39,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39 WrapperNode [2021-11-19 05:33:39,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:33:39,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:33:39,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:33:39,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:33:39,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,385 INFO L137 Inliner]: procedures = 186, calls = 1465, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4137 [2021-11-19 05:33:39,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:33:39,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:33:39,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:33:39,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:33:39,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:33:39,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:33:39,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:33:39,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:33:39,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (1/1) ... [2021-11-19 05:33:39,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:33:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:39,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:33:39,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:33:39,763 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2021-11-19 05:33:39,763 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2021-11-19 05:33:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2021-11-19 05:33:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2021-11-19 05:33:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-19 05:33:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-19 05:33:39,764 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-19 05:33:39,764 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2021-11-19 05:33:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2021-11-19 05:33:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2021-11-19 05:33:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2021-11-19 05:33:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2021-11-19 05:33:39,765 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2021-11-19 05:33:39,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:33:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-19 05:33:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-19 05:33:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2021-11-19 05:33:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2021-11-19 05:33:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-19 05:33:39,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-19 05:33:39,766 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-19 05:33:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-19 05:33:39,767 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-19 05:33:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2021-11-19 05:33:39,767 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2021-11-19 05:33:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:33:39,767 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-19 05:33:39,768 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-19 05:33:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-19 05:33:39,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-19 05:33:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-19 05:33:39,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-19 05:33:39,768 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2021-11-19 05:33:39,769 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2021-11-19 05:33:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2021-11-19 05:33:39,769 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2021-11-19 05:33:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-19 05:33:39,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-19 05:33:39,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 05:33:39,770 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 05:33:39,770 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2021-11-19 05:33:39,770 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2021-11-19 05:33:39,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 05:33:39,770 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2021-11-19 05:33:39,771 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2021-11-19 05:33:39,771 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2021-11-19 05:33:39,771 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2021-11-19 05:33:39,771 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-19 05:33:39,772 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-19 05:33:39,772 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-19 05:33:39,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:33:39,772 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2021-11-19 05:33:39,772 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2021-11-19 05:33:39,772 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-19 05:33:39,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-19 05:33:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 05:33:39,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:33:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-19 05:33:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2021-11-19 05:33:39,775 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2021-11-19 05:33:39,775 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2021-11-19 05:33:39,775 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2021-11-19 05:33:39,776 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 05:33:39,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-19 05:33:39,776 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2021-11-19 05:33:39,776 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2021-11-19 05:33:39,776 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-19 05:33:39,777 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-19 05:33:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-19 05:33:39,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-19 05:33:39,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 05:33:39,778 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-19 05:33:39,778 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-19 05:33:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-19 05:33:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-19 05:33:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2021-11-19 05:33:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2021-11-19 05:33:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-19 05:33:39,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-19 05:33:39,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:33:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 05:33:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2021-11-19 05:33:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2021-11-19 05:33:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-19 05:33:39,780 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-19 05:33:39,780 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-19 05:33:39,781 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-19 05:33:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2021-11-19 05:33:39,781 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2021-11-19 05:33:39,781 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2021-11-19 05:33:39,782 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2021-11-19 05:33:39,782 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2021-11-19 05:33:39,782 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2021-11-19 05:33:39,782 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-19 05:33:39,782 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-19 05:33:39,783 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-19 05:33:39,783 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-19 05:33:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-19 05:33:39,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-19 05:33:39,784 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2021-11-19 05:33:39,785 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2021-11-19 05:33:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2021-11-19 05:33:39,785 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2021-11-19 05:33:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:33:39,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-19 05:33:39,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-19 05:33:39,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:33:39,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:33:40,373 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:33:40,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:33:52,381 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:33:52,412 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:33:52,416 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 05:33:52,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:52 BoogieIcfgContainer [2021-11-19 05:33:52,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:33:52,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:33:52,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:33:52,429 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:33:52,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:33:36" (1/3) ... [2021-11-19 05:33:52,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275f4467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:52, skipping insertion in model container [2021-11-19 05:33:52,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:33:39" (2/3) ... [2021-11-19 05:33:52,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275f4467 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:33:52, skipping insertion in model container [2021-11-19 05:33:52,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:33:52" (3/3) ... [2021-11-19 05:33:52,437 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-19 05:33:52,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:33:52,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:33:52,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:33:52,514 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:33:52,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:33:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-19 05:33:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 05:33:52,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:52,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:52,579 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1121566205, now seen corresponding path program 1 times [2021-11-19 05:33:52,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:52,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030805333] [2021-11-19 05:33:52,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:52,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:53,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:53,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030805333] [2021-11-19 05:33:53,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030805333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:53,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:53,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:53,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136070695] [2021-11-19 05:33:53,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:53,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:33:53,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:33:53,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:53,178 INFO L87 Difference]: Start difference. First operand has 1195 states, 892 states have (on average 1.4663677130044843) internal successors, (1308), 909 states have internal predecessors, (1308), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:53,493 INFO L93 Difference]: Finished difference Result 2330 states and 3667 transitions. [2021-11-19 05:33:53,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:33:53,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-19 05:33:53,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:53,534 INFO L225 Difference]: With dead ends: 2330 [2021-11-19 05:33:53,535 INFO L226 Difference]: Without dead ends: 1136 [2021-11-19 05:33:53,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:53,560 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:53,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3413 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:33:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-19 05:33:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1131. [2021-11-19 05:33:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 839 states have (on average 1.4505363528009536) internal successors, (1217), 852 states have internal predecessors, (1217), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-19 05:33:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1708 transitions. [2021-11-19 05:33:53,790 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1708 transitions. Word has length 14 [2021-11-19 05:33:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:53,790 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1708 transitions. [2021-11-19 05:33:53,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1708 transitions. [2021-11-19 05:33:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 05:33:53,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:53,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:53,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:33:53,794 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:53,796 INFO L85 PathProgramCache]: Analyzing trace with hash 645647086, now seen corresponding path program 1 times [2021-11-19 05:33:53,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:53,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198225874] [2021-11-19 05:33:53,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:53,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:53,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:53,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198225874] [2021-11-19 05:33:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198225874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:53,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775029239] [2021-11-19 05:33:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:53,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:53,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:53,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:33:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:54,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:33:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:54,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:33:54,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775029239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:54,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:54,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-19 05:33:54,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647719] [2021-11-19 05:33:54,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:54,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:33:54,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:33:54,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:54,877 INFO L87 Difference]: Start difference. First operand 1131 states and 1708 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:55,104 INFO L93 Difference]: Finished difference Result 2268 states and 3427 transitions. [2021-11-19 05:33:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:33:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-19 05:33:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:55,122 INFO L225 Difference]: With dead ends: 2268 [2021-11-19 05:33:55,122 INFO L226 Difference]: Without dead ends: 1149 [2021-11-19 05:33:55,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:33:55,135 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 24 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5110 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:55,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 5110 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:33:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-19 05:33:55,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-19 05:33:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.446135831381733) internal successors, (1235), 867 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-19 05:33:55,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1732 transitions. [2021-11-19 05:33:55,246 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1732 transitions. Word has length 18 [2021-11-19 05:33:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:55,247 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1732 transitions. [2021-11-19 05:33:55,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1732 transitions. [2021-11-19 05:33:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-19 05:33:55,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:55,258 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:55,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:55,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:55,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1066609489, now seen corresponding path program 2 times [2021-11-19 05:33:55,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:55,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655379787] [2021-11-19 05:33:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:55,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-19 05:33:55,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:55,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655379787] [2021-11-19 05:33:55,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655379787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:55,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:33:55,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056767918] [2021-11-19 05:33:55,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:33:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:33:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:33:55,633 INFO L87 Difference]: Start difference. First operand 1149 states and 1732 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:55,745 INFO L93 Difference]: Finished difference Result 1154 states and 1736 transitions. [2021-11-19 05:33:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:33:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-19 05:33:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:55,756 INFO L225 Difference]: With dead ends: 1154 [2021-11-19 05:33:55,756 INFO L226 Difference]: Without dead ends: 1149 [2021-11-19 05:33:55,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:33:55,761 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 75 mSDsluCounter, 3317 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 5021 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:55,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 5021 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:33:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-11-19 05:33:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2021-11-19 05:33:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 854 states have (on average 1.4449648711943794) internal successors, (1234), 867 states have internal predecessors, (1234), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-19 05:33:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1731 transitions. [2021-11-19 05:33:55,826 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1731 transitions. Word has length 30 [2021-11-19 05:33:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:55,826 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1731 transitions. [2021-11-19 05:33:55,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:33:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1731 transitions. [2021-11-19 05:33:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 05:33:55,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:55,830 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:33:55,830 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 330312657, now seen corresponding path program 1 times [2021-11-19 05:33:55,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:55,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210200487] [2021-11-19 05:33:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:55,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 05:33:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:33:55,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:55,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210200487] [2021-11-19 05:33:55,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210200487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:55,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:55,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:55,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549478682] [2021-11-19 05:33:55,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:55,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:33:55,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:55,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:33:55,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:55,981 INFO L87 Difference]: Start difference. First operand 1149 states and 1731 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:56,058 INFO L93 Difference]: Finished difference Result 1161 states and 1745 transitions. [2021-11-19 05:33:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:33:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-11-19 05:33:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:56,069 INFO L225 Difference]: With dead ends: 1161 [2021-11-19 05:33:56,069 INFO L226 Difference]: Without dead ends: 1155 [2021-11-19 05:33:56,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:56,072 INFO L933 BasicCegarLoop]: 1703 mSDtfsCounter, 5 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3403 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:56,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 3403 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:33:56,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-11-19 05:33:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1150. [2021-11-19 05:33:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 855 states have (on average 1.4444444444444444) internal successors, (1235), 868 states have internal predecessors, (1235), 250 states have call successors, (250), 45 states have call predecessors, (250), 44 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-11-19 05:33:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1732 transitions. [2021-11-19 05:33:56,177 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1732 transitions. Word has length 38 [2021-11-19 05:33:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:56,178 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1732 transitions. [2021-11-19 05:33:56,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1732 transitions. [2021-11-19 05:33:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 05:33:56,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:56,181 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:56,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:33:56,182 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:56,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 631398726, now seen corresponding path program 1 times [2021-11-19 05:33:56,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:56,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762709972] [2021-11-19 05:33:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:56,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:56,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-19 05:33:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 05:33:56,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:56,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762709972] [2021-11-19 05:33:56,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762709972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:56,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:56,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:33:56,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986548426] [2021-11-19 05:33:56,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:56,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:33:56,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:56,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:33:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:56,339 INFO L87 Difference]: Start difference. First operand 1150 states and 1732 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:56,842 INFO L93 Difference]: Finished difference Result 1925 states and 2934 transitions. [2021-11-19 05:33:56,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:33:56,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-19 05:33:56,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:56,863 INFO L225 Difference]: With dead ends: 1925 [2021-11-19 05:33:56,863 INFO L226 Difference]: Without dead ends: 1918 [2021-11-19 05:33:56,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:33:56,867 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 1110 mSDsluCounter, 1693 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 3527 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:56,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1110 Valid, 3527 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:33:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-19 05:33:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1916. [2021-11-19 05:33:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1464 states have (on average 1.4576502732240437) internal successors, (2134), 1486 states have internal predecessors, (2134), 376 states have call successors, (376), 78 states have call predecessors, (376), 75 states have return successors, (414), 366 states have call predecessors, (414), 373 states have call successors, (414) [2021-11-19 05:33:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 2924 transitions. [2021-11-19 05:33:56,985 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 2924 transitions. Word has length 42 [2021-11-19 05:33:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:56,985 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 2924 transitions. [2021-11-19 05:33:56,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 05:33:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 2924 transitions. [2021-11-19 05:33:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 05:33:56,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:56,992 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:56,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:33:56,993 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:56,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:56,993 INFO L85 PathProgramCache]: Analyzing trace with hash 492616272, now seen corresponding path program 1 times [2021-11-19 05:33:56,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:56,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306326459] [2021-11-19 05:33:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:56,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:33:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:33:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:33:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 05:33:57,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 05:33:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 05:33:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:33:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:33:57,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 05:33:57,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:57,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306326459] [2021-11-19 05:33:57,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306326459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:33:57,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:33:57,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 05:33:57,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018183780] [2021-11-19 05:33:57,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:33:57,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:33:57,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:33:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:33:57,582 INFO L87 Difference]: Start difference. First operand 1916 states and 2924 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:34:00,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:16,719 INFO L93 Difference]: Finished difference Result 4493 states and 7130 transitions. [2021-11-19 05:34:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:34:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 88 [2021-11-19 05:34:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:16,756 INFO L225 Difference]: With dead ends: 4493 [2021-11-19 05:34:16,756 INFO L226 Difference]: Without dead ends: 2632 [2021-11-19 05:34:16,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:34:16,774 INFO L933 BasicCegarLoop]: 1869 mSDtfsCounter, 2486 mSDsluCounter, 9464 mSDsCounter, 0 mSdLazyCounter, 4857 mSolverCounterSat, 1069 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2629 SdHoareTripleChecker+Valid, 11333 SdHoareTripleChecker+Invalid, 5927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1069 IncrementalHoareTripleChecker+Valid, 4857 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:16,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2629 Valid, 11333 Invalid, 5927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1069 Valid, 4857 Invalid, 1 Unknown, 0 Unchecked, 17.8s Time] [2021-11-19 05:34:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-11-19 05:34:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2152. [2021-11-19 05:34:16,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1651 states have (on average 1.4470018170805572) internal successors, (2389), 1671 states have internal predecessors, (2389), 415 states have call successors, (415), 78 states have call predecessors, (415), 85 states have return successors, (531), 417 states have call predecessors, (531), 412 states have call successors, (531) [2021-11-19 05:34:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3335 transitions. [2021-11-19 05:34:16,948 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3335 transitions. Word has length 88 [2021-11-19 05:34:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:16,950 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3335 transitions. [2021-11-19 05:34:16,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 6 states have internal predecessors, (53), 3 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 05:34:16,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3335 transitions. [2021-11-19 05:34:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 05:34:16,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:16,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:16,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:34:16,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1386102610, now seen corresponding path program 1 times [2021-11-19 05:34:16,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:16,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914222479] [2021-11-19 05:34:16,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:16,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:34:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-19 05:34:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:34:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 05:34:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-19 05:34:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 05:34:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-19 05:34:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:34:17,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:17,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914222479] [2021-11-19 05:34:17,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914222479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:17,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559762323] [2021-11-19 05:34:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:17,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:17,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:17,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:17,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:34:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:34:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:34:18,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:34:19,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559762323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:19,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:34:19,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 15 [2021-11-19 05:34:19,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252602612] [2021-11-19 05:34:19,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:19,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 05:34:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 05:34:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:34:19,221 INFO L87 Difference]: Start difference. First operand 2152 states and 3335 transitions. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:34:22,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:31,932 INFO L93 Difference]: Finished difference Result 4797 states and 7649 transitions. [2021-11-19 05:34:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:34:31,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2021-11-19 05:34:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:31,964 INFO L225 Difference]: With dead ends: 4797 [2021-11-19 05:34:31,965 INFO L226 Difference]: Without dead ends: 2696 [2021-11-19 05:34:31,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-19 05:34:31,982 INFO L933 BasicCegarLoop]: 1789 mSDtfsCounter, 1887 mSDsluCounter, 5832 mSDsCounter, 0 mSdLazyCounter, 2622 mSolverCounterSat, 919 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1998 SdHoareTripleChecker+Valid, 7621 SdHoareTripleChecker+Invalid, 3542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 919 IncrementalHoareTripleChecker+Valid, 2622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:31,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1998 Valid, 7621 Invalid, 3542 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [919 Valid, 2622 Invalid, 1 Unknown, 0 Unchecked, 12.3s Time] [2021-11-19 05:34:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-19 05:34:32,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2224. [2021-11-19 05:34:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 1711 states have (on average 1.4383401519579193) internal successors, (2461), 1731 states have internal predecessors, (2461), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-19 05:34:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 3443 transitions. [2021-11-19 05:34:32,163 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 3443 transitions. Word has length 88 [2021-11-19 05:34:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:32,164 INFO L470 AbstractCegarLoop]: Abstraction has 2224 states and 3443 transitions. [2021-11-19 05:34:32,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 13 states have internal predecessors, (106), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:34:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 3443 transitions. [2021-11-19 05:34:32,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 05:34:32,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:32,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:32,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:32,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:32,384 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:32,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1024798374, now seen corresponding path program 1 times [2021-11-19 05:34:32,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:32,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173168206] [2021-11-19 05:34:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:32,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:32,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:34:32,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817617374] [2021-11-19 05:34:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:32,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:32,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:32,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:34:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:34:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:34:33,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:33,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:33,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173168206] [2021-11-19 05:34:33,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:34:33,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817617374] [2021-11-19 05:34:33,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817617374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:33,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:34:33,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:34:33,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452172765] [2021-11-19 05:34:33,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:33,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:34:33,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:33,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:34:33,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:34:33,424 INFO L87 Difference]: Start difference. First operand 2224 states and 3443 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:35,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:35,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:35,565 INFO L93 Difference]: Finished difference Result 4443 states and 6929 transitions. [2021-11-19 05:34:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:34:35,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2021-11-19 05:34:35,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:35,623 INFO L225 Difference]: With dead ends: 4443 [2021-11-19 05:34:35,624 INFO L226 Difference]: Without dead ends: 2228 [2021-11-19 05:34:35,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:34:35,645 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1 mSDsluCounter, 1701 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3405 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:35,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 3405 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 05:34:35,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-11-19 05:34:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2226. [2021-11-19 05:34:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 1713 states have (on average 1.4378283712784588) internal successors, (2463), 1733 states have internal predecessors, (2463), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-19 05:34:35,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3445 transitions. [2021-11-19 05:34:35,776 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3445 transitions. Word has length 92 [2021-11-19 05:34:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:35,777 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 3445 transitions. [2021-11-19 05:34:35,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3445 transitions. [2021-11-19 05:34:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 05:34:35,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:35,788 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:35,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:36,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 05:34:36,016 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:36,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1125315305, now seen corresponding path program 1 times [2021-11-19 05:34:36,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:36,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310120584] [2021-11-19 05:34:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:36,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:36,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:34:36,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628777908] [2021-11-19 05:34:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:36,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:36,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:36,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:34:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:36,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:34:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:34:37,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 05:34:37,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:37,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310120584] [2021-11-19 05:34:37,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:34:37,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628777908] [2021-11-19 05:34:37,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628777908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:37,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:37,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-19 05:34:37,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214003902] [2021-11-19 05:34:37,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:37,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:34:37,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:34:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:37,360 INFO L87 Difference]: Start difference. First operand 2226 states and 3445 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 05:34:39,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:39,533 INFO L93 Difference]: Finished difference Result 4455 states and 6945 transitions. [2021-11-19 05:34:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:34:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 98 [2021-11-19 05:34:39,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:39,569 INFO L225 Difference]: With dead ends: 4455 [2021-11-19 05:34:39,569 INFO L226 Difference]: Without dead ends: 2238 [2021-11-19 05:34:39,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:34:39,587 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 6 mSDsluCounter, 3402 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:39,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 5106 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 05:34:39,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-11-19 05:34:39,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 2238. [2021-11-19 05:34:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 1725 states have (on average 1.434782608695652) internal successors, (2475), 1745 states have internal predecessors, (2475), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-19 05:34:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 3457 transitions. [2021-11-19 05:34:39,770 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 3457 transitions. Word has length 98 [2021-11-19 05:34:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:39,770 INFO L470 AbstractCegarLoop]: Abstraction has 2238 states and 3457 transitions. [2021-11-19 05:34:39,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-19 05:34:39,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 3457 transitions. [2021-11-19 05:34:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 05:34:39,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:39,776 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:39,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:39,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:39,992 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 692597909, now seen corresponding path program 2 times [2021-11-19 05:34:39,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:39,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093517102] [2021-11-19 05:34:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:39,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:40,031 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:34:40,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56851900] [2021-11-19 05:34:40,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:34:40,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:40,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:40,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:40,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:34:47,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 05:34:47,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:34:47,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1835 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 05:34:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 05:34:47,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:34:47,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:47,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093517102] [2021-11-19 05:34:47,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:34:47,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56851900] [2021-11-19 05:34:47,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56851900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:34:47,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:34:47,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:34:47,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27642342] [2021-11-19 05:34:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:34:47,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:34:47,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:34:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:34:47,865 INFO L87 Difference]: Start difference. First operand 2238 states and 3457 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:50,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:50,193 INFO L93 Difference]: Finished difference Result 4475 states and 6982 transitions. [2021-11-19 05:34:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:34:50,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-19 05:34:50,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:50,214 INFO L225 Difference]: With dead ends: 4475 [2021-11-19 05:34:50,215 INFO L226 Difference]: Without dead ends: 2246 [2021-11-19 05:34:50,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:34:50,233 INFO L933 BasicCegarLoop]: 1708 mSDtfsCounter, 5 mSDsluCounter, 3398 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5106 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:50,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5106 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 05:34:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-11-19 05:34:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2242. [2021-11-19 05:34:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1729 states have (on average 1.4337767495662233) internal successors, (2479), 1749 states have internal predecessors, (2479), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-19 05:34:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3461 transitions. [2021-11-19 05:34:50,354 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3461 transitions. Word has length 104 [2021-11-19 05:34:50,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:50,354 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3461 transitions. [2021-11-19 05:34:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-19 05:34:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3461 transitions. [2021-11-19 05:34:50,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 05:34:50,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:50,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:50,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:50,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 05:34:50,588 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:50,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1472243980, now seen corresponding path program 1 times [2021-11-19 05:34:50,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:50,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124497739] [2021-11-19 05:34:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:50,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:34:50,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725759934] [2021-11-19 05:34:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:50,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:50,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:50,640 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:50,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:34:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:34:51,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 05:34:51,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:34:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:34:52,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124497739] [2021-11-19 05:34:52,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:34:52,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725759934] [2021-11-19 05:34:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725759934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:34:52,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:34:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-19 05:34:52,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234979122] [2021-11-19 05:34:52,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:34:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:34:52,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:34:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:34:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:34:52,443 INFO L87 Difference]: Start difference. First operand 2242 states and 3461 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:34:54,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:56,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:34:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:34:56,709 INFO L93 Difference]: Finished difference Result 4499 states and 6995 transitions. [2021-11-19 05:34:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:34:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 119 [2021-11-19 05:34:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:34:56,791 INFO L225 Difference]: With dead ends: 4499 [2021-11-19 05:34:56,792 INFO L226 Difference]: Without dead ends: 2266 [2021-11-19 05:34:56,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:34:56,810 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 10 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:34:56,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6807 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2021-11-19 05:34:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-11-19 05:34:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2266. [2021-11-19 05:34:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 1753 states have (on average 1.4278379920136908) internal successors, (2503), 1773 states have internal predecessors, (2503), 427 states have call successors, (427), 78 states have call predecessors, (427), 85 states have return successors, (555), 429 states have call predecessors, (555), 424 states have call successors, (555) [2021-11-19 05:34:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 3485 transitions. [2021-11-19 05:34:56,924 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 3485 transitions. Word has length 119 [2021-11-19 05:34:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:34:56,925 INFO L470 AbstractCegarLoop]: Abstraction has 2266 states and 3485 transitions. [2021-11-19 05:34:56,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:34:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 3485 transitions. [2021-11-19 05:34:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 05:34:56,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:34:56,932 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:34:56,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:34:57,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:57,148 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:34:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:34:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash -394245464, now seen corresponding path program 1 times [2021-11-19 05:34:57,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:34:57,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820679550] [2021-11-19 05:34:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:57,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:34:57,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:34:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-19 05:34:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-19 05:34:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-19 05:34:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-19 05:34:57,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-19 05:34:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-19 05:34:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:57,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:34:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:34:58,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:34:58,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820679550] [2021-11-19 05:34:58,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820679550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:34:58,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175670541] [2021-11-19 05:34:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:34:58,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:34:58,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:34:58,004 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:34:58,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:34:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:34:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:34:58,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:34:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 190 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:34:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:35:00,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175670541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:00,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:35:00,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2021-11-19 05:35:00,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954136341] [2021-11-19 05:35:00,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:00,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 05:35:00,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 05:35:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2021-11-19 05:35:00,684 INFO L87 Difference]: Start difference. First operand 2266 states and 3485 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:35:04,907 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:18,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:18,904 INFO L93 Difference]: Finished difference Result 5025 states and 7961 transitions. [2021-11-19 05:35:18,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 05:35:18,905 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-11-19 05:35:18,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:18,933 INFO L225 Difference]: With dead ends: 5025 [2021-11-19 05:35:18,934 INFO L226 Difference]: Without dead ends: 2882 [2021-11-19 05:35:18,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:35:18,944 INFO L933 BasicCegarLoop]: 1808 mSDtfsCounter, 1962 mSDsluCounter, 10358 mSDsCounter, 0 mSdLazyCounter, 4258 mSolverCounterSat, 988 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 12166 SdHoareTripleChecker+Invalid, 5247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 988 IncrementalHoareTripleChecker+Valid, 4258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:18,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2097 Valid, 12166 Invalid, 5247 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [988 Valid, 4258 Invalid, 1 Unknown, 0 Unchecked, 17.8s Time] [2021-11-19 05:35:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2021-11-19 05:35:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2410. [2021-11-19 05:35:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 1873 states have (on average 1.4132407901761879) internal successors, (2647), 1893 states have internal predecessors, (2647), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-19 05:35:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3701 transitions. [2021-11-19 05:35:19,076 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3701 transitions. Word has length 111 [2021-11-19 05:35:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:19,077 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 3701 transitions. [2021-11-19 05:35:19,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 25 states have internal predecessors, (153), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:35:19,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3701 transitions. [2021-11-19 05:35:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 05:35:19,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:19,083 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:19,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:19,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 05:35:19,297 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash -372113542, now seen corresponding path program 1 times [2021-11-19 05:35:19,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:19,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025948411] [2021-11-19 05:35:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:19,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:19,418 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:19,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67082437] [2021-11-19 05:35:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:19,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:19,420 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:19,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:35:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2158 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 05:35:20,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:35:20,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 05:35:22,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:22,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025948411] [2021-11-19 05:35:22,115 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:22,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67082437] [2021-11-19 05:35:22,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67082437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:22,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:22,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-11-19 05:35:22,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498006868] [2021-11-19 05:35:22,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:22,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:35:22,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:35:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:35:22,117 INFO L87 Difference]: Start difference. First operand 2410 states and 3701 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:35:24,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:26,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:28,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:30,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:30,615 INFO L93 Difference]: Finished difference Result 4859 states and 7559 transitions. [2021-11-19 05:35:30,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:35:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 123 [2021-11-19 05:35:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:30,680 INFO L225 Difference]: With dead ends: 4859 [2021-11-19 05:35:30,680 INFO L226 Difference]: Without dead ends: 2458 [2021-11-19 05:35:30,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:35:30,696 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 22 mSDsluCounter, 8505 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10209 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:30,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10209 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 4 Unknown, 0 Unchecked, 8.4s Time] [2021-11-19 05:35:30,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-11-19 05:35:30,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2458. [2021-11-19 05:35:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2458 states, 1921 states have (on average 1.4029151483602291) internal successors, (2695), 1941 states have internal predecessors, (2695), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-19 05:35:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 3749 transitions. [2021-11-19 05:35:30,818 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 3749 transitions. Word has length 123 [2021-11-19 05:35:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:30,818 INFO L470 AbstractCegarLoop]: Abstraction has 2458 states and 3749 transitions. [2021-11-19 05:35:30,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:35:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 3749 transitions. [2021-11-19 05:35:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-19 05:35:30,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:30,828 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:30,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:31,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:31,044 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:31,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:31,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1685848428, now seen corresponding path program 2 times [2021-11-19 05:35:31,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:31,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51745505] [2021-11-19 05:35:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:31,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:31,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:35:31,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2126098781] [2021-11-19 05:35:31,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:35:31,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:31,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:31,085 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:31,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:35:32,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:35:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:35:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 2248 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:35:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 4 proven. 484 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 05:35:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 05:35:35,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:35,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51745505] [2021-11-19 05:35:35,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:35:35,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126098781] [2021-11-19 05:35:35,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126098781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:35,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:35:35,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 34 [2021-11-19 05:35:35,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319525734] [2021-11-19 05:35:35,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:35,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 05:35:35,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:35,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 05:35:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:35:35,738 INFO L87 Difference]: Start difference. First operand 2458 states and 3749 transitions. Second operand has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:35:38,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:40,108 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:35:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:35:40,278 INFO L93 Difference]: Finished difference Result 4947 states and 7643 transitions. [2021-11-19 05:35:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:35:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 155 [2021-11-19 05:35:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:35:40,342 INFO L225 Difference]: With dead ends: 4947 [2021-11-19 05:35:40,343 INFO L226 Difference]: Without dead ends: 2498 [2021-11-19 05:35:40,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:35:40,358 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 32 mSDsluCounter, 5103 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 6807 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:35:40,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 6807 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 05:35:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-11-19 05:35:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2498. [2021-11-19 05:35:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1961 states have (on average 1.3946965833758287) internal successors, (2735), 1981 states have internal predecessors, (2735), 451 states have call successors, (451), 78 states have call predecessors, (451), 85 states have return successors, (603), 453 states have call predecessors, (603), 448 states have call successors, (603) [2021-11-19 05:35:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 3789 transitions. [2021-11-19 05:35:40,465 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 3789 transitions. Word has length 155 [2021-11-19 05:35:40,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:35:40,466 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 3789 transitions. [2021-11-19 05:35:40,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.4411764705882355) internal successors, (151), 34 states have internal predecessors, (151), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-19 05:35:40,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 3789 transitions. [2021-11-19 05:35:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 05:35:40,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:35:40,478 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:35:40,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:35:40,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:40,704 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:35:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:35:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -508063359, now seen corresponding path program 1 times [2021-11-19 05:35:40,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:35:40,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845278506] [2021-11-19 05:35:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:40,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:35:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:35:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-19 05:35:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-19 05:35:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-19 05:35:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-19 05:35:42,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-19 05:35:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:35:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:35:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:35:42,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:35:42,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845278506] [2021-11-19 05:35:42,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845278506] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:35:42,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725769608] [2021-11-19 05:35:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:35:42,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:35:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:35:42,690 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:35:42,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:35:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:35:43,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:35:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:35:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 2 proven. 946 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 05:35:44,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:35:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 05:35:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725769608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:35:46,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:35:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 37 [2021-11-19 05:35:46,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69820874] [2021-11-19 05:35:46,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:35:46,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 05:35:46,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:35:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 05:35:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=733, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:35:46,242 INFO L87 Difference]: Start difference. First operand 2498 states and 3789 transitions. Second operand has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:35:50,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:01,560 INFO L93 Difference]: Finished difference Result 5321 states and 8313 transitions. [2021-11-19 05:36:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:36:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2021-11-19 05:36:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:01,583 INFO L225 Difference]: With dead ends: 5321 [2021-11-19 05:36:01,584 INFO L226 Difference]: Without dead ends: 3090 [2021-11-19 05:36:01,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 05:36:01,591 INFO L933 BasicCegarLoop]: 1938 mSDtfsCounter, 1978 mSDsluCounter, 5931 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 1152 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2129 SdHoareTripleChecker+Valid, 7869 SdHoareTripleChecker+Invalid, 4379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:01,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2129 Valid, 7869 Invalid, 4379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 3226 Invalid, 1 Unknown, 0 Unchecked, 14.8s Time] [2021-11-19 05:36:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2021-11-19 05:36:01,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2618. [2021-11-19 05:36:01,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2061 states have (on average 1.3852498786996603) internal successors, (2855), 2081 states have internal predecessors, (2855), 471 states have call successors, (471), 78 states have call predecessors, (471), 85 states have return successors, (643), 473 states have call predecessors, (643), 468 states have call successors, (643) [2021-11-19 05:36:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 3969 transitions. [2021-11-19 05:36:01,748 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 3969 transitions. Word has length 161 [2021-11-19 05:36:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:01,748 INFO L470 AbstractCegarLoop]: Abstraction has 2618 states and 3969 transitions. [2021-11-19 05:36:01,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 35 states have internal predecessors, (199), 2 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:36:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 3969 transitions. [2021-11-19 05:36:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 05:36:01,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:01,762 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:01,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-19 05:36:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:01,989 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1277498002, now seen corresponding path program 2 times [2021-11-19 05:36:01,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:01,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606615727] [2021-11-19 05:36:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:01,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:02,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:36:02,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399705632] [2021-11-19 05:36:02,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:36:02,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:02,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:02,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:02,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:36:03,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:36:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:36:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 2290 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:36:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-19 05:36:04,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:36:04,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:04,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606615727] [2021-11-19 05:36:04,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:36:04,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399705632] [2021-11-19 05:36:04,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399705632] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:04,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:04,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:36:04,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420489456] [2021-11-19 05:36:04,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:04,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:36:04,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:36:04,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:36:04,643 INFO L87 Difference]: Start difference. First operand 2618 states and 3969 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 05:36:14,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:14,312 INFO L93 Difference]: Finished difference Result 2972 states and 4496 transitions. [2021-11-19 05:36:14,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:36:14,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 167 [2021-11-19 05:36:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:14,330 INFO L225 Difference]: With dead ends: 2972 [2021-11-19 05:36:14,330 INFO L226 Difference]: Without dead ends: 2969 [2021-11-19 05:36:14,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:36:14,333 INFO L933 BasicCegarLoop]: 1757 mSDtfsCounter, 3377 mSDsluCounter, 2313 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 1088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 4070 SdHoareTripleChecker+Invalid, 3406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1088 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:14,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 4070 Invalid, 3406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1088 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-19 05:36:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2969 states. [2021-11-19 05:36:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2969 to 2962. [2021-11-19 05:36:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2328 states have (on average 1.3964776632302405) internal successors, (3251), 2355 states have internal predecessors, (3251), 527 states have call successors, (527), 100 states have call predecessors, (527), 106 states have return successors, (707), 526 states have call predecessors, (707), 524 states have call successors, (707) [2021-11-19 05:36:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 4485 transitions. [2021-11-19 05:36:14,480 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 4485 transitions. Word has length 167 [2021-11-19 05:36:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:14,480 INFO L470 AbstractCegarLoop]: Abstraction has 2962 states and 4485 transitions. [2021-11-19 05:36:14,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-19 05:36:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 4485 transitions. [2021-11-19 05:36:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 05:36:14,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:14,503 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:14,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:14,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 05:36:14,720 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1756424649, now seen corresponding path program 1 times [2021-11-19 05:36:14,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:14,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380159882] [2021-11-19 05:36:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:14,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:14,760 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:36:14,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171145099] [2021-11-19 05:36:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:14,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:14,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:14,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:36:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:36:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1054 trivial. 0 not checked. [2021-11-19 05:36:16,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:36:16,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:16,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380159882] [2021-11-19 05:36:16,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:36:16,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171145099] [2021-11-19 05:36:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171145099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:16,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:16,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:36:16,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516115571] [2021-11-19 05:36:16,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:16,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:36:16,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:36:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:36:16,978 INFO L87 Difference]: Start difference. First operand 2962 states and 4485 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 05:36:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:17,287 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2021-11-19 05:36:17,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:36:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 192 [2021-11-19 05:36:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:17,305 INFO L225 Difference]: With dead ends: 2964 [2021-11-19 05:36:17,305 INFO L226 Difference]: Without dead ends: 2961 [2021-11-19 05:36:17,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:36:17,308 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 1595 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:17,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1702 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:36:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-11-19 05:36:17,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2949. [2021-11-19 05:36:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3967297762478486) internal successors, (3246), 2345 states have internal predecessors, (3246), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-19 05:36:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4463 transitions. [2021-11-19 05:36:17,466 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4463 transitions. Word has length 192 [2021-11-19 05:36:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:17,467 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4463 transitions. [2021-11-19 05:36:17,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-19 05:36:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4463 transitions. [2021-11-19 05:36:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-19 05:36:17,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:17,501 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:17,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:17,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 05:36:17,728 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:17,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1625806616, now seen corresponding path program 1 times [2021-11-19 05:36:17,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:17,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711673109] [2021-11-19 05:36:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:17,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:36:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:36:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:17,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:36:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:36:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:36:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-19 05:36:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:36:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:36:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:36:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:36:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2021-11-19 05:36:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:36:18,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:18,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711673109] [2021-11-19 05:36:18,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711673109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:18,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:36:18,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:36:18,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364093085] [2021-11-19 05:36:18,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:18,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:36:18,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:18,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:36:18,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:36:18,207 INFO L87 Difference]: Start difference. First operand 2949 states and 4463 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:36:21,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:29,761 INFO L93 Difference]: Finished difference Result 6161 states and 9614 transitions. [2021-11-19 05:36:29,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:36:29,762 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 258 [2021-11-19 05:36:29,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:29,785 INFO L225 Difference]: With dead ends: 6161 [2021-11-19 05:36:29,786 INFO L226 Difference]: Without dead ends: 3603 [2021-11-19 05:36:29,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:36:29,798 INFO L933 BasicCegarLoop]: 1684 mSDtfsCounter, 1830 mSDsluCounter, 2992 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 891 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1942 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 2986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:29,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1942 Valid, 4676 Invalid, 2986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [891 Valid, 2094 Invalid, 1 Unknown, 0 Unchecked, 11.1s Time] [2021-11-19 05:36:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-11-19 05:36:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2949. [2021-11-19 05:36:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2324 states have (on average 1.3941480206540446) internal successors, (3240), 2345 states have internal predecessors, (3240), 518 states have call successors, (518), 98 states have call predecessors, (518), 106 states have return successors, (699), 525 states have call predecessors, (699), 516 states have call successors, (699) [2021-11-19 05:36:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4457 transitions. [2021-11-19 05:36:29,985 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4457 transitions. Word has length 258 [2021-11-19 05:36:29,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:29,986 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 4457 transitions. [2021-11-19 05:36:29,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (16), 5 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:36:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4457 transitions. [2021-11-19 05:36:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-19 05:36:30,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:30,022 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:30,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 05:36:30,023 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1634015816, now seen corresponding path program 1 times [2021-11-19 05:36:30,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:30,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475394732] [2021-11-19 05:36:30,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:30,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:36:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:36:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:36:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:36:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 05:36:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:30,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:36:30,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:36:31,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:36:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:36:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-19 05:36:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-11-19 05:36:31,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475394732] [2021-11-19 05:36:31,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475394732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7490929] [2021-11-19 05:36:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:31,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:31,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:31,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:31,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:36:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:36:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-19 05:36:32,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:36:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-19 05:36:33,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7490929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:36:33,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:36:33,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-19 05:36:33,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387257095] [2021-11-19 05:36:33,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:36:33,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:36:33,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:36:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:36:33,193 INFO L87 Difference]: Start difference. First operand 2949 states and 4457 transitions. Second operand has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 05:36:36,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:36:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:54,788 INFO L93 Difference]: Finished difference Result 6313 states and 9915 transitions. [2021-11-19 05:36:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:36:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 255 [2021-11-19 05:36:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:54,816 INFO L225 Difference]: With dead ends: 6313 [2021-11-19 05:36:54,816 INFO L226 Difference]: Without dead ends: 3755 [2021-11-19 05:36:54,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-19 05:36:54,830 INFO L933 BasicCegarLoop]: 1698 mSDtfsCounter, 3561 mSDsluCounter, 7530 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 1413 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3637 SdHoareTripleChecker+Valid, 9228 SdHoareTripleChecker+Invalid, 5651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1413 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:54,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3637 Valid, 9228 Invalid, 5651 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1413 Valid, 4237 Invalid, 1 Unknown, 0 Unchecked, 19.3s Time] [2021-11-19 05:36:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3755 states. [2021-11-19 05:36:54,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3755 to 3011. [2021-11-19 05:36:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 2378 states have (on average 1.3923465096719934) internal successors, (3311), 2398 states have internal predecessors, (3311), 526 states have call successors, (526), 98 states have call predecessors, (526), 106 states have return successors, (715), 534 states have call predecessors, (715), 524 states have call successors, (715) [2021-11-19 05:36:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4552 transitions. [2021-11-19 05:36:55,094 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4552 transitions. Word has length 255 [2021-11-19 05:36:55,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:55,095 INFO L470 AbstractCegarLoop]: Abstraction has 3011 states and 4552 transitions. [2021-11-19 05:36:55,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 9 states have internal predecessors, (118), 5 states have call successors, (25), 5 states have call predecessors, (25), 3 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-11-19 05:36:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4552 transitions. [2021-11-19 05:36:55,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-19 05:36:55,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:55,127 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:55,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:55,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:55,352 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:55,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1160302493, now seen corresponding path program 1 times [2021-11-19 05:36:55,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:55,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301379858] [2021-11-19 05:36:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:55,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:55,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:36:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:55,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:36:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:36:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:36:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:36:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-19 05:36:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:36:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:36:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:36:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:36:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2021-11-19 05:36:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2021-11-19 05:36:56,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:56,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301379858] [2021-11-19 05:36:56,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301379858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:56,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125432524] [2021-11-19 05:36:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:56,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:56,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:56,346 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:56,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:36:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:56,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 05:36:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:36:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2023 trivial. 0 not checked. [2021-11-19 05:36:57,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:36:57,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125432524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:36:57,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:36:57,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2021-11-19 05:36:57,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947941277] [2021-11-19 05:36:57,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:36:57,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:36:57,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:36:57,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:36:57,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:36:57,800 INFO L87 Difference]: Start difference. First operand 3011 states and 4552 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:36:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:36:58,027 INFO L93 Difference]: Finished difference Result 5691 states and 8621 transitions. [2021-11-19 05:36:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:36:58,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 260 [2021-11-19 05:36:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:36:58,045 INFO L225 Difference]: With dead ends: 5691 [2021-11-19 05:36:58,045 INFO L226 Difference]: Without dead ends: 3071 [2021-11-19 05:36:58,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:36:58,062 INFO L933 BasicCegarLoop]: 1703 mSDtfsCounter, 19 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3393 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:36:58,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3393 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:36:58,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-11-19 05:36:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3017. [2021-11-19 05:36:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3017 states, 2384 states have (on average 1.3913590604026846) internal successors, (3317), 2404 states have internal predecessors, (3317), 526 states have call successors, (526), 98 states have call predecessors, (526), 106 states have return successors, (715), 534 states have call predecessors, (715), 524 states have call successors, (715) [2021-11-19 05:36:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 4558 transitions. [2021-11-19 05:36:58,247 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 4558 transitions. Word has length 260 [2021-11-19 05:36:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:36:58,248 INFO L470 AbstractCegarLoop]: Abstraction has 3017 states and 4558 transitions. [2021-11-19 05:36:58,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 05:36:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 4558 transitions. [2021-11-19 05:36:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-19 05:36:58,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:36:58,267 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:36:58,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:36:58,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:58,493 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:36:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:36:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1858282651, now seen corresponding path program 1 times [2021-11-19 05:36:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:36:58,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486087938] [2021-11-19 05:36:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:58,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:36:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:36:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:36:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:36:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:36:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 05:36:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:36:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:58,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:36:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:36:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:36:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:36:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:36:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 253 [2021-11-19 05:36:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2055 trivial. 0 not checked. [2021-11-19 05:36:59,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:36:59,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486087938] [2021-11-19 05:36:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486087938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:36:59,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397423085] [2021-11-19 05:36:59,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:36:59,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:36:59,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:36:59,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:36:59,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:36:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:36:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:36:59,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 2022 trivial. 0 not checked. [2021-11-19 05:37:00,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:37:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2056 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2021-11-19 05:37:02,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397423085] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:37:02,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:37:02,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-11-19 05:37:02,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936194070] [2021-11-19 05:37:02,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:37:02,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 05:37:02,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 05:37:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:37:02,015 INFO L87 Difference]: Start difference. First operand 3017 states and 4558 transitions. Second operand has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 05:37:05,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:21,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:21,857 INFO L93 Difference]: Finished difference Result 6446 states and 10056 transitions. [2021-11-19 05:37:21,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:37:21,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 267 [2021-11-19 05:37:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:21,883 INFO L225 Difference]: With dead ends: 6446 [2021-11-19 05:37:21,883 INFO L226 Difference]: Without dead ends: 3820 [2021-11-19 05:37:21,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:37:21,897 INFO L933 BasicCegarLoop]: 1711 mSDtfsCounter, 2027 mSDsluCounter, 8799 mSDsCounter, 0 mSdLazyCounter, 4557 mSolverCounterSat, 987 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2155 SdHoareTripleChecker+Valid, 10510 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 4557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:21,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2155 Valid, 10510 Invalid, 5545 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [987 Valid, 4557 Invalid, 1 Unknown, 0 Unchecked, 18.9s Time] [2021-11-19 05:37:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3820 states. [2021-11-19 05:37:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3820 to 3153. [2021-11-19 05:37:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 2500 states have (on average 1.3884) internal successors, (3471), 2521 states have internal predecessors, (3471), 546 states have call successors, (546), 98 states have call predecessors, (546), 106 states have return successors, (755), 553 states have call predecessors, (755), 544 states have call successors, (755) [2021-11-19 05:37:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4772 transitions. [2021-11-19 05:37:22,160 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4772 transitions. Word has length 267 [2021-11-19 05:37:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:22,161 INFO L470 AbstractCegarLoop]: Abstraction has 3153 states and 4772 transitions. [2021-11-19 05:37:22,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.411764705882353) internal successors, (160), 14 states have internal predecessors, (160), 4 states have call successors, (25), 5 states have call predecessors, (25), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-19 05:37:22,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4772 transitions. [2021-11-19 05:37:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-11-19 05:37:22,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:22,183 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 8, 8, 8, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:22,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:37:22,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:37:22,405 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:37:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:22,405 INFO L85 PathProgramCache]: Analyzing trace with hash -470066191, now seen corresponding path program 1 times [2021-11-19 05:37:22,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:37:22,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821363906] [2021-11-19 05:37:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:22,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:37:22,461 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:37:22,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074362863] [2021-11-19 05:37:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:22,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:37:22,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:37:22,463 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:37:22,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:37:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 4109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:37:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2021-11-19 05:37:25,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:37:25,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:37:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821363906] [2021-11-19 05:37:25,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:37:25,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074362863] [2021-11-19 05:37:25,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074362863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:37:25,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:37:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:37:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021536598] [2021-11-19 05:37:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:37:25,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:37:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:25,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:37:25,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:37:25,198 INFO L87 Difference]: Start difference. First operand 3153 states and 4772 transitions. Second operand has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 05:37:25,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:25,719 INFO L93 Difference]: Finished difference Result 5253 states and 8052 transitions. [2021-11-19 05:37:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:37:25,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) Word has length 530 [2021-11-19 05:37:25,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:25,740 INFO L225 Difference]: With dead ends: 5253 [2021-11-19 05:37:25,741 INFO L226 Difference]: Without dead ends: 3169 [2021-11-19 05:37:25,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:37:25,756 INFO L933 BasicCegarLoop]: 1707 mSDtfsCounter, 6 mSDsluCounter, 11926 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13633 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:25,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 13633 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:37:25,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3169 states. [2021-11-19 05:37:25,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3169 to 3158. [2021-11-19 05:37:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 2504 states have (on average 1.387779552715655) internal successors, (3475), 2525 states have internal predecessors, (3475), 546 states have call successors, (546), 98 states have call predecessors, (546), 107 states have return successors, (770), 554 states have call predecessors, (770), 544 states have call successors, (770) [2021-11-19 05:37:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 4791 transitions. [2021-11-19 05:37:25,953 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 4791 transitions. Word has length 530 [2021-11-19 05:37:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:25,955 INFO L470 AbstractCegarLoop]: Abstraction has 3158 states and 4791 transitions. [2021-11-19 05:37:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.555555555555557) internal successors, (176), 7 states have internal predecessors, (176), 3 states have call successors, (50), 2 states have call predecessors, (50), 4 states have return successors, (47), 5 states have call predecessors, (47), 3 states have call successors, (47) [2021-11-19 05:37:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 4791 transitions. [2021-11-19 05:37:25,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-11-19 05:37:25,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:25,979 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:26,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:37:26,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 05:37:26,205 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:37:26,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:26,206 INFO L85 PathProgramCache]: Analyzing trace with hash 210499369, now seen corresponding path program 1 times [2021-11-19 05:37:26,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:37:26,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632184783] [2021-11-19 05:37:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:26,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:37:26,273 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:37:26,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255479520] [2021-11-19 05:37:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:26,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:37:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:37:26,275 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:37:26,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 05:37:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:27,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 4399 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:37:27,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:28,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2157 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-11-19 05:37:28,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:37:28,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:37:28,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632184783] [2021-11-19 05:37:28,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:37:28,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255479520] [2021-11-19 05:37:28,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255479520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:37:28,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:37:28,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:37:28,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107611534] [2021-11-19 05:37:28,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:37:28,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:37:28,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:37:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:37:28,707 INFO L87 Difference]: Start difference. First operand 3158 states and 4791 transitions. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 05:37:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:29,227 INFO L93 Difference]: Finished difference Result 5278 states and 8143 transitions. [2021-11-19 05:37:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:37:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) Word has length 574 [2021-11-19 05:37:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:29,247 INFO L225 Difference]: With dead ends: 5278 [2021-11-19 05:37:29,247 INFO L226 Difference]: Without dead ends: 3189 [2021-11-19 05:37:29,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:37:29,263 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 7 mSDsluCounter, 12036 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13760 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:29,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13760 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:37:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-11-19 05:37:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3175. [2021-11-19 05:37:29,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2515 states have (on average 1.3860834990059643) internal successors, (3486), 2535 states have internal predecessors, (3486), 550 states have call successors, (550), 98 states have call predecessors, (550), 109 states have return successors, (804), 561 states have call predecessors, (804), 548 states have call successors, (804) [2021-11-19 05:37:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4840 transitions. [2021-11-19 05:37:29,479 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4840 transitions. Word has length 574 [2021-11-19 05:37:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:29,481 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4840 transitions. [2021-11-19 05:37:29,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 7 states have internal predecessors, (116), 3 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (33), 4 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-19 05:37:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4840 transitions. [2021-11-19 05:37:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-11-19 05:37:29,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:29,503 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:29,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:37:29,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 05:37:29,728 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:37:29,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:29,729 INFO L85 PathProgramCache]: Analyzing trace with hash 306096356, now seen corresponding path program 1 times [2021-11-19 05:37:29,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:37:29,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811613500] [2021-11-19 05:37:29,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:29,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:37:29,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 05:37:29,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642668542] [2021-11-19 05:37:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:29,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:37:29,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:37:29,798 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:37:29,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 05:37:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:30,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 3247 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 05:37:30,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 65 proven. 86 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2021-11-19 05:37:32,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:37:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1281 trivial. 0 not checked. [2021-11-19 05:37:36,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:37:36,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811613500] [2021-11-19 05:37:36,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 05:37:36,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642668542] [2021-11-19 05:37:36,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642668542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:37:36,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 05:37:36,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 13 [2021-11-19 05:37:36,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800128406] [2021-11-19 05:37:36,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 05:37:36,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:37:36,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:36,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:37:36,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:37:36,084 INFO L87 Difference]: Start difference. First operand 3175 states and 4840 transitions. Second operand has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2021-11-19 05:37:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:37:46,520 INFO L93 Difference]: Finished difference Result 3374 states and 5123 transitions. [2021-11-19 05:37:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:37:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) Word has length 369 [2021-11-19 05:37:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:37:46,542 INFO L225 Difference]: With dead ends: 3374 [2021-11-19 05:37:46,542 INFO L226 Difference]: Without dead ends: 3371 [2021-11-19 05:37:46,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:37:46,547 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 5899 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 2566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5906 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 5006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2566 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:37:46,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5906 Valid, 3983 Invalid, 5006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2566 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-19 05:37:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-11-19 05:37:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3303. [2021-11-19 05:37:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 2619 states have (on average 1.3921344024436808) internal successors, (3646), 2638 states have internal predecessors, (3646), 559 states have call successors, (559), 111 states have call predecessors, (559), 124 states have return successors, (811), 574 states have call predecessors, (811), 558 states have call successors, (811) [2021-11-19 05:37:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 5016 transitions. [2021-11-19 05:37:46,763 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 5016 transitions. Word has length 369 [2021-11-19 05:37:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:37:46,764 INFO L470 AbstractCegarLoop]: Abstraction has 3303 states and 5016 transitions. [2021-11-19 05:37:46,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 8 states have call successors, (59), 8 states have call predecessors, (59), 10 states have return successors, (55), 7 states have call predecessors, (55), 7 states have call successors, (55) [2021-11-19 05:37:46,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 5016 transitions. [2021-11-19 05:37:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-19 05:37:46,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:37:46,784 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:37:46,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:37:47,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 05:37:47,002 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:37:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:37:47,002 INFO L85 PathProgramCache]: Analyzing trace with hash -956084343, now seen corresponding path program 1 times [2021-11-19 05:37:47,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:37:47,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144153623] [2021-11-19 05:37:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:47,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:37:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:37:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:37:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:37:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:37:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:37:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 05:37:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-19 05:37:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:37:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:37:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:37:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:37:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:37:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:37:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:37:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2021-11-19 05:37:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2021-11-19 05:37:48,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:37:48,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144153623] [2021-11-19 05:37:48,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144153623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:37:48,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770030239] [2021-11-19 05:37:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:37:48,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:37:48,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:37:48,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:37:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 05:37:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:37:48,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 05:37:48,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:37:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2028 trivial. 0 not checked. [2021-11-19 05:37:49,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:37:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-11-19 05:37:50,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770030239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:37:50,196 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:37:50,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 4, 4] total 13 [2021-11-19 05:37:50,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136110734] [2021-11-19 05:37:50,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:37:50,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:37:50,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:37:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:37:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:37:50,198 INFO L87 Difference]: Start difference. First operand 3303 states and 5016 transitions. Second operand has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 05:37:54,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:37:56,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:38:14,456 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:38:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:19,997 INFO L93 Difference]: Finished difference Result 7186 states and 11264 transitions. [2021-11-19 05:38:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 05:38:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 268 [2021-11-19 05:38:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:20,026 INFO L225 Difference]: With dead ends: 7186 [2021-11-19 05:38:20,027 INFO L226 Difference]: Without dead ends: 4274 [2021-11-19 05:38:20,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-19 05:38:20,040 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 3413 mSDsluCounter, 9557 mSDsCounter, 0 mSdLazyCounter, 5493 mSolverCounterSat, 1263 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 11299 SdHoareTripleChecker+Invalid, 6759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 5493 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:20,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3492 Valid, 11299 Invalid, 6759 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1263 Valid, 5493 Invalid, 3 Unknown, 0 Unchecked, 27.6s Time] [2021-11-19 05:38:20,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-11-19 05:38:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3483. [2021-11-19 05:38:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3834776334776335) internal successors, (3835), 2791 states have internal predecessors, (3835), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-19 05:38:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5286 transitions. [2021-11-19 05:38:20,316 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5286 transitions. Word has length 268 [2021-11-19 05:38:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:20,317 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5286 transitions. [2021-11-19 05:38:20,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.0) internal successors, (156), 9 states have internal predecessors, (156), 3 states have call successors, (33), 5 states have call predecessors, (33), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 05:38:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5286 transitions. [2021-11-19 05:38:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-19 05:38:20,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:20,337 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:20,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:38:20,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 05:38:20,564 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:38:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1001977345, now seen corresponding path program 1 times [2021-11-19 05:38:20,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:38:20,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796246601] [2021-11-19 05:38:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:20,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:38:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:38:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:38:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:38:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:38:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:38:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-19 05:38:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:38:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:38:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:38:20,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:20,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:38:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:20,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:38:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2021-11-19 05:38:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2021-11-19 05:38:21,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:38:21,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796246601] [2021-11-19 05:38:21,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796246601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:38:21,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:38:21,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:38:21,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465100210] [2021-11-19 05:38:21,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:38:21,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:38:21,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:38:21,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:38:21,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:38:21,011 INFO L87 Difference]: Start difference. First operand 3483 states and 5286 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:24,016 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:38:33,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:38:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:36,621 INFO L93 Difference]: Finished difference Result 7572 states and 11913 transitions. [2021-11-19 05:38:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:38:36,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 257 [2021-11-19 05:38:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:36,656 INFO L225 Difference]: With dead ends: 7572 [2021-11-19 05:38:36,656 INFO L226 Difference]: Without dead ends: 4480 [2021-11-19 05:38:36,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:38:36,670 INFO L933 BasicCegarLoop]: 1806 mSDtfsCounter, 1273 mSDsluCounter, 3287 mSDsCounter, 0 mSdLazyCounter, 2772 mSolverCounterSat, 515 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1382 SdHoareTripleChecker+Valid, 5093 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 2772 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:36,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1382 Valid, 5093 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 2772 Invalid, 1 Unknown, 0 Unchecked, 15.1s Time] [2021-11-19 05:38:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2021-11-19 05:38:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 3483. [2021-11-19 05:38:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3813131313131313) internal successors, (3829), 2791 states have internal predecessors, (3829), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-19 05:38:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5280 transitions. [2021-11-19 05:38:36,915 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5280 transitions. Word has length 257 [2021-11-19 05:38:36,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5280 transitions. [2021-11-19 05:38:36,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5280 transitions. [2021-11-19 05:38:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-19 05:38:36,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:36,936 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:36,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-19 05:38:36,936 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:38:36,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash -832123994, now seen corresponding path program 1 times [2021-11-19 05:38:36,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:38:36,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125927640] [2021-11-19 05:38:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:36,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:38:36,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:38:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:38:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:38:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:38:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:38:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-19 05:38:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:38:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:38:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:38:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:38:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:38:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-11-19 05:38:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-19 05:38:38,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:38:38,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125927640] [2021-11-19 05:38:38,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125927640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:38:38,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215194215] [2021-11-19 05:38:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:38,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:38:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:38:38,091 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:38:38,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 05:38:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:38:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:38:39,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:38:39,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215194215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:38:39,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:38:39,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 12 [2021-11-19 05:38:39,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049532817] [2021-11-19 05:38:39,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:38:39,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:38:39,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:38:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:38:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:38:39,187 INFO L87 Difference]: Start difference. First operand 3483 states and 5280 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:39,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:39,472 INFO L93 Difference]: Finished difference Result 6609 states and 10032 transitions. [2021-11-19 05:38:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:38:39,473 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 266 [2021-11-19 05:38:39,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:39,497 INFO L225 Difference]: With dead ends: 6609 [2021-11-19 05:38:39,497 INFO L226 Difference]: Without dead ends: 3517 [2021-11-19 05:38:39,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:38:39,512 INFO L933 BasicCegarLoop]: 1701 mSDtfsCounter, 140 mSDsluCounter, 4978 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 6679 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:39,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 6679 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 05:38:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-11-19 05:38:39,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 3483. [2021-11-19 05:38:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 2772 states have (on average 1.3802308802308803) internal successors, (3826), 2791 states have internal predecessors, (3826), 586 states have call successors, (586), 111 states have call predecessors, (586), 124 states have return successors, (865), 601 states have call predecessors, (865), 585 states have call successors, (865) [2021-11-19 05:38:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 5277 transitions. [2021-11-19 05:38:39,754 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 5277 transitions. Word has length 266 [2021-11-19 05:38:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:39,755 INFO L470 AbstractCegarLoop]: Abstraction has 3483 states and 5277 transitions. [2021-11-19 05:38:39,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 5277 transitions. [2021-11-19 05:38:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-19 05:38:39,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:39,778 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:39,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:38:40,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 05:38:40,004 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:38:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -527666968, now seen corresponding path program 1 times [2021-11-19 05:38:40,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:38:40,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090515307] [2021-11-19 05:38:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:40,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:38:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:38:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:38:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:38:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:38:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:38:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 05:38:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:38:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:38:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:38:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:40,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:38:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:41,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:38:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-19 05:38:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2029 trivial. 0 not checked. [2021-11-19 05:38:41,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:38:41,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090515307] [2021-11-19 05:38:41,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090515307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:38:41,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540095978] [2021-11-19 05:38:41,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:41,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:38:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:38:41,014 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:38:41,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 05:38:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 05:38:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:38:42,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 05:38:42,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540095978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:38:42,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 05:38:42,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-11-19 05:38:42,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268903765] [2021-11-19 05:38:42,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:38:42,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:38:42,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:38:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:38:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:38:42,657 INFO L87 Difference]: Start difference. First operand 3483 states and 5277 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:38:43,018 INFO L93 Difference]: Finished difference Result 6773 states and 10305 transitions. [2021-11-19 05:38:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:38:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 259 [2021-11-19 05:38:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:38:43,034 INFO L225 Difference]: With dead ends: 6773 [2021-11-19 05:38:43,034 INFO L226 Difference]: Without dead ends: 3681 [2021-11-19 05:38:43,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:38:43,043 INFO L933 BasicCegarLoop]: 1739 mSDtfsCounter, 120 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 5131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:38:43,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 5131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:38:43,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3681 states. [2021-11-19 05:38:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3681 to 3533. [2021-11-19 05:38:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 2811 states have (on average 1.3810032017075773) internal successors, (3882), 2826 states have internal predecessors, (3882), 597 states have call successors, (597), 111 states have call predecessors, (597), 124 states have return successors, (887), 616 states have call predecessors, (887), 596 states have call successors, (887) [2021-11-19 05:38:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 5366 transitions. [2021-11-19 05:38:43,262 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 5366 transitions. Word has length 259 [2021-11-19 05:38:43,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:38:43,263 INFO L470 AbstractCegarLoop]: Abstraction has 3533 states and 5366 transitions. [2021-11-19 05:38:43,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 05:38:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 5366 transitions. [2021-11-19 05:38:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-19 05:38:43,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:38:43,286 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:38:43,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 05:38:43,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-19 05:38:43,512 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:38:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:38:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1084797559, now seen corresponding path program 1 times [2021-11-19 05:38:43,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:38:43,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345020301] [2021-11-19 05:38:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:43,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:38:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:38:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:38:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:38:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:38:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:38:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-19 05:38:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:38:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:43,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:38:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:38:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:38:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:38:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:38:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2021-11-19 05:38:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:38:44,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:38:44,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345020301] [2021-11-19 05:38:44,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345020301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:38:44,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958881227] [2021-11-19 05:38:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:38:44,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:38:44,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:38:44,091 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:38:44,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 05:38:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:38:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 2020 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 05:38:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:38:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:38:45,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:38:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2033 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:38:45,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958881227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:38:45,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:38:45,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2021-11-19 05:38:45,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580508310] [2021-11-19 05:38:45,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:38:45,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:38:45,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:38:45,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:38:45,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:38:45,731 INFO L87 Difference]: Start difference. First operand 3533 states and 5366 transitions. Second operand has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 9 states have internal predecessors, (119), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:38:48,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:00,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:00,324 INFO L93 Difference]: Finished difference Result 4385 states and 6991 transitions. [2021-11-19 05:39:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:39:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 9 states have internal predecessors, (119), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 256 [2021-11-19 05:39:00,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:00,351 INFO L225 Difference]: With dead ends: 4385 [2021-11-19 05:39:00,352 INFO L226 Difference]: Without dead ends: 4379 [2021-11-19 05:39:00,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 534 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:39:00,357 INFO L933 BasicCegarLoop]: 1702 mSDtfsCounter, 2259 mSDsluCounter, 5699 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 1271 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 7401 SdHoareTripleChecker+Invalid, 4289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1271 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:00,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 7401 Invalid, 4289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1271 Valid, 3017 Invalid, 1 Unknown, 0 Unchecked, 14.2s Time] [2021-11-19 05:39:00,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-11-19 05:39:00,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3581. [2021-11-19 05:39:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 2851 states have (on average 1.3784636969484392) internal successors, (3930), 2866 states have internal predecessors, (3930), 605 states have call successors, (605), 111 states have call predecessors, (605), 124 states have return successors, (903), 624 states have call predecessors, (903), 604 states have call successors, (903) [2021-11-19 05:39:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5438 transitions. [2021-11-19 05:39:00,628 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5438 transitions. Word has length 256 [2021-11-19 05:39:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:00,629 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5438 transitions. [2021-11-19 05:39:00,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.916666666666666) internal successors, (119), 9 states have internal predecessors, (119), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:39:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5438 transitions. [2021-11-19 05:39:00,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-19 05:39:00,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:00,653 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:00,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 05:39:00,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 05:39:00,868 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:39:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1306535477, now seen corresponding path program 1 times [2021-11-19 05:39:00,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:39:00,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027438948] [2021-11-19 05:39:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:00,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:39:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:39:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:39:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:39:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:39:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:39:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:39:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 05:39:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:39:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:39:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:39:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:39:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:39:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:39:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-19 05:39:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:01,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:39:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027438948] [2021-11-19 05:39:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027438948] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:39:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320006311] [2021-11-19 05:39:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:01,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:39:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:39:01,679 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:39:01,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 05:39:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:02,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 2076 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 05:39:02,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:04,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320006311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:04,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:39:04,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2021-11-19 05:39:04,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416155820] [2021-11-19 05:39:04,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:04,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 05:39:04,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:39:04,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 05:39:04,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:39:04,109 INFO L87 Difference]: Start difference. First operand 3581 states and 5438 transitions. Second operand has 20 states, 20 states have (on average 7.8) internal successors, (156), 17 states have internal predecessors, (156), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:39:07,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:09,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:21,931 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:26,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:39:26,004 INFO L93 Difference]: Finished difference Result 4481 states and 7139 transitions. [2021-11-19 05:39:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 05:39:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 17 states have internal predecessors, (156), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 277 [2021-11-19 05:39:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:39:26,026 INFO L225 Difference]: With dead ends: 4481 [2021-11-19 05:39:26,026 INFO L226 Difference]: Without dead ends: 4475 [2021-11-19 05:39:26,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:39:26,030 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 1555 mSDsluCounter, 6102 mSDsCounter, 0 mSdLazyCounter, 3777 mSolverCounterSat, 591 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 7781 SdHoareTripleChecker+Invalid, 4371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 3777 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:39:26,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1695 Valid, 7781 Invalid, 4371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [591 Valid, 3777 Invalid, 3 Unknown, 0 Unchecked, 21.4s Time] [2021-11-19 05:39:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-11-19 05:39:26,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3677. [2021-11-19 05:39:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 2931 states have (on average 1.3735926305015353) internal successors, (4026), 2946 states have internal predecessors, (4026), 621 states have call successors, (621), 111 states have call predecessors, (621), 124 states have return successors, (935), 640 states have call predecessors, (935), 620 states have call successors, (935) [2021-11-19 05:39:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5582 transitions. [2021-11-19 05:39:26,334 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5582 transitions. Word has length 277 [2021-11-19 05:39:26,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:39:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 5582 transitions. [2021-11-19 05:39:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.8) internal successors, (156), 17 states have internal predecessors, (156), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:39:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5582 transitions. [2021-11-19 05:39:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-11-19 05:39:26,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:39:26,355 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 14, 14, 14, 14, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:39:26,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 05:39:26,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:39:26,556 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:39:26,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:39:26,556 INFO L85 PathProgramCache]: Analyzing trace with hash -163663258, now seen corresponding path program 1 times [2021-11-19 05:39:26,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:39:26,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057285780] [2021-11-19 05:39:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:26,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:39:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:39:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:39:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:39:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:39:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:39:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:39:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-11-19 05:39:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:39:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:39:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:39:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:39:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:39:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:39:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 241 [2021-11-19 05:39:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:27,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:39:27,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057285780] [2021-11-19 05:39:27,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057285780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:39:27,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982876845] [2021-11-19 05:39:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:39:27,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:39:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:39:27,929 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:39:27,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 05:39:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:39:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 05:39:28,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:39:29,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:29,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:39:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:39:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982876845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:39:32,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:39:32,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 36 [2021-11-19 05:39:32,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924881323] [2021-11-19 05:39:32,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:39:32,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 05:39:32,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:39:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 05:39:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:39:32,145 INFO L87 Difference]: Start difference. First operand 3677 states and 5582 transitions. Second operand has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 33 states have internal predecessors, (218), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:39:36,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:38,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:39:59,696 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:40:04,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:04,767 INFO L93 Difference]: Finished difference Result 4673 states and 7435 transitions. [2021-11-19 05:40:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:40:04,768 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 33 states have internal predecessors, (218), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 307 [2021-11-19 05:40:04,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:04,801 INFO L225 Difference]: With dead ends: 4673 [2021-11-19 05:40:04,801 INFO L226 Difference]: Without dead ends: 4667 [2021-11-19 05:40:04,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 624 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:40:04,808 INFO L933 BasicCegarLoop]: 1848 mSDtfsCounter, 1505 mSDsluCounter, 11928 mSDsCounter, 0 mSdLazyCounter, 7195 mSolverCounterSat, 656 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 13776 SdHoareTripleChecker+Invalid, 7853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 7195 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:04,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1679 Valid, 13776 Invalid, 7853 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [656 Valid, 7195 Invalid, 2 Unknown, 0 Unchecked, 31.9s Time] [2021-11-19 05:40:04,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4667 states. [2021-11-19 05:40:05,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4667 to 3869. [2021-11-19 05:40:05,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3091 states have (on average 1.3646069233257845) internal successors, (4218), 3106 states have internal predecessors, (4218), 653 states have call successors, (653), 111 states have call predecessors, (653), 124 states have return successors, (999), 672 states have call predecessors, (999), 652 states have call successors, (999) [2021-11-19 05:40:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 5870 transitions. [2021-11-19 05:40:05,075 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 5870 transitions. Word has length 307 [2021-11-19 05:40:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:05,076 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 5870 transitions. [2021-11-19 05:40:05,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.055555555555555) internal successors, (218), 33 states have internal predecessors, (218), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:40:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 5870 transitions. [2021-11-19 05:40:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-11-19 05:40:05,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:05,161 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 30, 30, 30, 30, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:05,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 05:40:05,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:40:05,377 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:40:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:05,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1048710461, now seen corresponding path program 2 times [2021-11-19 05:40:05,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:40:05,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758763514] [2021-11-19 05:40:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:05,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:40:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:40:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:40:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:40:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:40:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:40:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:40:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-19 05:40:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:40:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:40:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:40:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:40:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:40:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:40:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 243 [2021-11-19 05:40:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:40:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:40:08,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758763514] [2021-11-19 05:40:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758763514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:40:08,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947528703] [2021-11-19 05:40:08,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:40:08,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:40:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:40:08,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:40:08,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 05:40:09,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:40:09,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:40:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:40:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:40:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:40:10,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:40:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2021-11-19 05:40:12,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947528703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:40:12,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:40:12,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 38 [2021-11-19 05:40:12,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361754450] [2021-11-19 05:40:12,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:40:12,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 05:40:12,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:40:12,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 05:40:12,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 05:40:12,598 INFO L87 Difference]: Start difference. First operand 3869 states and 5870 transitions. Second operand has 38 states, 38 states have (on average 6.105263157894737) internal successors, (232), 35 states have internal predecessors, (232), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:40:17,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:40:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:40:34,989 INFO L93 Difference]: Finished difference Result 4697 states and 7457 transitions. [2021-11-19 05:40:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 05:40:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.105263157894737) internal successors, (232), 35 states have internal predecessors, (232), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 373 [2021-11-19 05:40:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:40:35,011 INFO L225 Difference]: With dead ends: 4697 [2021-11-19 05:40:35,011 INFO L226 Difference]: Without dead ends: 4691 [2021-11-19 05:40:35,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 05:40:35,017 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 2453 mSDsluCounter, 10106 mSDsCounter, 0 mSdLazyCounter, 5081 mSolverCounterSat, 1407 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2627 SdHoareTripleChecker+Valid, 11850 SdHoareTripleChecker+Invalid, 6489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1407 IncrementalHoareTripleChecker+Valid, 5081 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:40:35,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2627 Valid, 11850 Invalid, 6489 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1407 Valid, 5081 Invalid, 1 Unknown, 0 Unchecked, 21.7s Time] [2021-11-19 05:40:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-11-19 05:40:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3893. [2021-11-19 05:40:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3111 states have (on average 1.3635486981677918) internal successors, (4242), 3126 states have internal predecessors, (4242), 657 states have call successors, (657), 111 states have call predecessors, (657), 124 states have return successors, (1007), 676 states have call predecessors, (1007), 656 states have call successors, (1007) [2021-11-19 05:40:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5906 transitions. [2021-11-19 05:40:35,232 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5906 transitions. Word has length 373 [2021-11-19 05:40:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:40:35,233 INFO L470 AbstractCegarLoop]: Abstraction has 3893 states and 5906 transitions. [2021-11-19 05:40:35,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.105263157894737) internal successors, (232), 35 states have internal predecessors, (232), 2 states have call successors, (21), 5 states have call predecessors, (21), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-19 05:40:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5906 transitions. [2021-11-19 05:40:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2021-11-19 05:40:35,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:40:35,263 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:40:35,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 05:40:35,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d8813e5-44a9-4585-b8f2-1d454b5dc4a0/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-19 05:40:35,464 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:40:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:40:35,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1382388889, now seen corresponding path program 1 times [2021-11-19 05:40:35,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:40:35,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062983247] [2021-11-19 05:40:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:40:35,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:40:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-19 05:40:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-19 05:40:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-19 05:40:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:40:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-19 05:40:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 05:40:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-19 05:40:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 05:40:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-19 05:40:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-19 05:40:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 05:40:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:40:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:37,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-19 05:40:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-11-19 05:40:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:40:37,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4043 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4043 trivial. 0 not checked. [2021-11-19 05:40:37,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:40:37,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062983247] [2021-11-19 05:40:37,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062983247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:40:37,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:40:37,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 05:40:37,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67752439] [2021-11-19 05:40:37,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:40:37,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:40:37,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:40:37,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:40:37,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:40:37,150 INFO L87 Difference]: Start difference. First operand 3893 states and 5906 transitions. Second operand has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 10 states have internal predecessors, (98), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 05:40:40,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 05:41:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:41:05,346 INFO L93 Difference]: Finished difference Result 5185 states and 8198 transitions. [2021-11-19 05:41:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:41:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 10 states have internal predecessors, (98), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 380 [2021-11-19 05:41:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:41:05,349 INFO L225 Difference]: With dead ends: 5185 [2021-11-19 05:41:05,349 INFO L226 Difference]: Without dead ends: 0 [2021-11-19 05:41:05,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:41:05,377 INFO L933 BasicCegarLoop]: 1491 mSDtfsCounter, 7832 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 5807 mSolverCounterSat, 3758 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7928 SdHoareTripleChecker+Valid, 5331 SdHoareTripleChecker+Invalid, 9566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3758 IncrementalHoareTripleChecker+Valid, 5807 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:41:05,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7928 Valid, 5331 Invalid, 9566 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3758 Valid, 5807 Invalid, 1 Unknown, 0 Unchecked, 26.4s Time] [2021-11-19 05:41:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-19 05:41:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-19 05:41:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:41:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-19 05:41:05,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 380 [2021-11-19 05:41:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:41:05,379 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-19 05:41:05,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.166666666666666) internal successors, (98), 10 states have internal predecessors, (98), 6 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-19 05:41:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-19 05:41:05,380 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-19 05:41:05,382 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 05:41:05,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-19 05:41:05,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-19 05:43:10,303 WARN L227 SmtUtils]: Spent 24.36s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:43:34,175 WARN L227 SmtUtils]: Spent 23.87s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:44:10,732 WARN L227 SmtUtils]: Spent 25.00s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:44:35,959 WARN L227 SmtUtils]: Spent 25.23s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:44:50,446 WARN L227 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:44:59,643 WARN L227 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-19 05:45:51,349 WARN L227 SmtUtils]: Spent 24.96s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)