./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2753d752216607180728226381b5a5c2bb1273cd3c02dbf53b55cd0db95c4306 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:49:55,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:49:55,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:49:55,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:49:55,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:49:55,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:49:55,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:49:55,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:49:55,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:49:55,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:49:55,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:49:55,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:49:55,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:49:55,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:49:55,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:49:55,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:49:55,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:49:55,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:49:55,838 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:49:55,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:49:55,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:49:55,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:49:55,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:49:55,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:49:55,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:49:55,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:49:55,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:49:55,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:49:55,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:49:55,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:49:55,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:49:55,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:49:55,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:49:55,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:49:55,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:49:55,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:49:55,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:49:55,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:49:55,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:49:55,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:49:55,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:49:55,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:49:55,891 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:49:55,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:49:55,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:49:55,892 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:49:55,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:49:55,893 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:49:55,894 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:49:55,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:49:55,894 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:49:55,895 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:49:55,895 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:49:55,895 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:49:55,895 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:49:55,896 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:49:55,896 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:49:55,896 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:49:55,897 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:49:55,897 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:49:55,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:49:55,898 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:49:55,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:49:55,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:49:55,899 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:49:55,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:49:55,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:49:55,900 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:49:55,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:49:55,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:49:55,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:49:55,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:49:55,901 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:49:55,901 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:49:55,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:49:55,902 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:49:55,902 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:49:55,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:49:55,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:49:55,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:49:55,903 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_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2753d752216607180728226381b5a5c2bb1273cd3c02dbf53b55cd0db95c4306 [2022-11-03 02:49:56,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:49:56,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:49:56,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:49:56,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:49:56,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:49:56,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i [2022-11-03 02:49:56,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/data/5cf06b295/799b1da8f1b3498b9a8056c780d6ed3e/FLAGbe449bfc3 [2022-11-03 02:49:57,115 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:49:57,116 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i [2022-11-03 02:49:57,176 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/data/5cf06b295/799b1da8f1b3498b9a8056c780d6ed3e/FLAGbe449bfc3 [2022-11-03 02:49:57,570 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/data/5cf06b295/799b1da8f1b3498b9a8056c780d6ed3e [2022-11-03 02:49:57,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:49:57,576 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:49:57,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:49:57,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:49:57,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:49:57,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:57" (1/1) ... [2022-11-03 02:49:57,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3954cb10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:49:57, skipping insertion in model container [2022-11-03 02:49:57,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:49:57" (1/1) ... [2022-11-03 02:49:57,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:49:57,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:50:00,041 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_c5ba6258-4fd7-435a-b5d6-269ef0c805de/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i[277173,277186] [2022-11-03 02:50:00,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:00,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:50:00,725 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_c5ba6258-4fd7-435a-b5d6-269ef0c805de/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i[277173,277186] [2022-11-03 02:50:00,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:50:00,893 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:50:00,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00 WrapperNode [2022-11-03 02:50:00,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:50:00,895 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:00,895 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:50:00,896 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:50:00,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:00,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,201 INFO L138 Inliner]: procedures = 384, calls = 3030, calls flagged for inlining = 180, calls inlined = 148, statements flattened = 6709 [2022-11-03 02:50:01,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:50:01,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:50:01,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:50:01,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:50:01,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:50:01,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:50:01,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:50:01,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:50:01,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (1/1) ... [2022-11-03 02:50:01,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:50:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:01,594 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:50:01,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:50:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-11-03 02:50:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-11-03 02:50:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-03 02:50:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-03 02:50:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-03 02:50:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-03 02:50:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2022-11-03 02:50:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2022-11-03 02:50:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_kick_command_queue [2022-11-03 02:50:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_kick_command_queue [2022-11-03 02:50:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:50:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:50:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:50:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:50:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_flush_input_fifo [2022-11-03 02:50:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_flush_input_fifo [2022-11-03 02:50:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:50:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:50:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-11-03 02:50:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-11-03 02:50:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_read_config [2022-11-03 02:50:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_read_config [2022-11-03 02:50:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2022-11-03 02:50:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2022-11-03 02:50:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-03 02:50:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-03 02:50:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_delayed_work [2022-11-03 02:50:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_delayed_work [2022-11-03 02:50:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_u132_lock_of_usb_ftdi [2022-11-03 02:50:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_u132_lock_of_usb_ftdi [2022-11-03 02:50:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:50:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:50:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-03 02:50:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-03 02:50:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:50:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:50:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2022-11-03 02:50:01,639 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2022-11-03 02:50:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:50:01,639 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:50:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:50:01,639 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:50:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_status_work [2022-11-03 02:50:01,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_status_work [2022-11-03 02:50:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_response_cancel_work [2022-11-03 02:50:01,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_response_cancel_work [2022-11-03 02:50:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:50:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-03 02:50:01,641 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-03 02:50:01,641 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-03 02:50:01,641 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-03 02:50:01,641 INFO L130 BoogieDeclarations]: Found specification of procedure up [2022-11-03 02:50:01,641 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2022-11-03 02:50:01,641 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_get_kref [2022-11-03 02:50:01,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_get_kref [2022-11-03 02:50:01,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:50:01,642 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-03 02:50:01,642 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2022-11-03 02:50:01,642 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2022-11-03 02:50:01,642 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2022-11-03 02:50:01,643 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2022-11-03 02:50:01,643 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_status_cancel_work [2022-11-03 02:50:01,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_status_cancel_work [2022-11-03 02:50:01,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_ftdi_module_lock [2022-11-03 02:50:01,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_ftdi_module_lock [2022-11-03 02:50:01,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:50:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2022-11-03 02:50:01,644 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2022-11-03 02:50:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:50:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_command_cancel_work [2022-11-03 02:50:01,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_command_cancel_work [2022-11-03 02:50:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-03 02:50:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-03 02:50:01,645 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-03 02:50:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-03 02:50:01,645 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-03 02:50:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-03 02:50:01,645 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_do_callback [2022-11-03 02:50:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_do_callback [2022-11-03 02:50:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_command_requeue_work [2022-11-03 02:50:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_command_requeue_work [2022-11-03 02:50:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-11-03 02:50:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-11-03 02:50:01,646 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2022-11-03 02:50:01,646 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2022-11-03 02:50:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2022-11-03 02:50:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2022-11-03 02:50:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-03 02:50:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-03 02:50:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_found_controller [2022-11-03 02:50:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_found_controller [2022-11-03 02:50:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_setup_controller [2022-11-03 02:50:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_setup_controller [2022-11-03 02:50:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_gone_away [2022-11-03 02:50:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_gone_away [2022-11-03 02:50:01,648 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_write_config [2022-11-03 02:50:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_write_config [2022-11-03 02:50:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_respond_work [2022-11-03 02:50:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_respond_work [2022-11-03 02:50:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-03 02:50:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_status_requeue_work [2022-11-03 02:50:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_status_requeue_work [2022-11-03 02:50:01,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-03 02:50:01,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-03 02:50:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2022-11-03 02:50:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2022-11-03 02:50:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:50:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2022-11-03 02:50:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2022-11-03 02:50:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_read_reg [2022-11-03 02:50:01,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_read_reg [2022-11-03 02:50:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_disconnect [2022-11-03 02:50:01,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_disconnect [2022-11-03 02:50:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_respond_queue_work [2022-11-03 02:50:01,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_respond_queue_work [2022-11-03 02:50:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_write [2022-11-03 02:50:01,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_write [2022-11-03 02:50:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-03 02:50:01,652 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-03 02:50:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_abandon_completions [2022-11-03 02:50:01,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_abandon_completions [2022-11-03 02:50:01,652 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2022-11-03 02:50:01,653 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2022-11-03 02:50:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:50:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-03 02:50:01,653 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-03 02:50:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:50:01,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:50:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_89 [2022-11-03 02:50:01,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_89 [2022-11-03 02:50:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_88 [2022-11-03 02:50:01,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_88 [2022-11-03 02:50:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_flush_workqueue_87 [2022-11-03 02:50:01,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_flush_workqueue_87 [2022-11-03 02:50:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_command_work [2022-11-03 02:50:01,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_command_work [2022-11-03 02:50:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:50:01,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:50:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_put_kref [2022-11-03 02:50:01,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_put_kref [2022-11-03 02:50:01,655 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_abandon_targets [2022-11-03 02:50:01,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_abandon_targets [2022-11-03 02:50:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:50:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_write_pcimem [2022-11-03 02:50:01,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_write_pcimem [2022-11-03 02:50:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-03 02:50:01,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-03 02:50:01,656 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2022-11-03 02:50:01,657 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2022-11-03 02:50:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_u132_lock_of_usb_ftdi [2022-11-03 02:50:01,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_u132_lock_of_usb_ftdi [2022-11-03 02:50:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:50:01,657 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-03 02:50:01,657 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-03 02:50:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:50:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_response_requeue_work [2022-11-03 02:50:01,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_response_requeue_work [2022-11-03 02:50:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:50:01,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-03 02:50:01,658 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-03 02:50:01,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-03 02:50:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_command_queue_work [2022-11-03 02:50:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_command_queue_work [2022-11-03 02:50:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-03 02:50:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-03 02:50:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_read_pcimem [2022-11-03 02:50:01,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_read_pcimem [2022-11-03 02:50:01,659 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2022-11-03 02:50:01,660 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2022-11-03 02:50:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2022-11-03 02:50:01,660 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2022-11-03 02:50:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2022-11-03 02:50:01,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2022-11-03 02:50:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-03 02:50:01,661 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-03 02:50:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-03 02:50:01,661 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-03 02:50:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure ftdi_elan_write_reg [2022-11-03 02:50:01,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ftdi_elan_write_reg [2022-11-03 02:50:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_ftdi_module_lock [2022-11-03 02:50:01,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_ftdi_module_lock [2022-11-03 02:50:01,661 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work [2022-11-03 02:50:01,662 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work [2022-11-03 02:50:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:50:01,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:50:01,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:50:02,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:50:02,448 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:50:03,605 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:50:20,785 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:50:21,643 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:50:21,644 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:50:21,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:21 BoogieIcfgContainer [2022-11-03 02:50:21,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:50:21,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:50:21,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:50:21,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:50:21,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:49:57" (1/3) ... [2022-11-03 02:50:21,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c626795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:21, skipping insertion in model container [2022-11-03 02:50:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:50:00" (2/3) ... [2022-11-03 02:50:21,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c626795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:50:21, skipping insertion in model container [2022-11-03 02:50:21,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:50:21" (3/3) ... [2022-11-03 02:50:21,660 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--misc--ftdi-elan.ko-entry_point.cil.out.i [2022-11-03 02:50:21,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:50:21,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:50:21,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:50:21,775 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@66e0d6f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:50:21,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:50:21,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 1433 states, 885 states have (on average 1.4124293785310735) internal successors, (1250), 938 states have internal predecessors, (1250), 461 states have call successors, (461), 86 states have call predecessors, (461), 85 states have return successors, (454), 445 states have call predecessors, (454), 454 states have call successors, (454) [2022-11-03 02:50:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:50:21,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:21,806 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:21,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash 250540312, now seen corresponding path program 1 times [2022-11-03 02:50:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100140389] [2022-11-03 02:50:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:21,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:22,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:50:23,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100140389] [2022-11-03 02:50:23,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100140389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:23,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:23,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:50:23,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320888942] [2022-11-03 02:50:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:23,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:23,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:23,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:23,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:23,390 INFO L87 Difference]: Start difference. First operand has 1433 states, 885 states have (on average 1.4124293785310735) internal successors, (1250), 938 states have internal predecessors, (1250), 461 states have call successors, (461), 86 states have call predecessors, (461), 85 states have return successors, (454), 445 states have call predecessors, (454), 454 states have call successors, (454) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:50:25,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:27,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:31,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:31,638 INFO L93 Difference]: Finished difference Result 3948 states and 6544 transitions. [2022-11-03 02:50:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:31,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 102 [2022-11-03 02:50:31,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:31,700 INFO L225 Difference]: With dead ends: 3948 [2022-11-03 02:50:31,701 INFO L226 Difference]: Without dead ends: 2518 [2022-11-03 02:50:31,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:31,735 INFO L413 NwaCegarLoop]: 2485 mSDtfsCounter, 1970 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 4361 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:31,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 4361 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2022-11-03 02:50:31,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2022-11-03 02:50:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2509. [2022-11-03 02:50:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1601 states have (on average 1.419737663960025) internal successors, (2273), 1677 states have internal predecessors, (2273), 752 states have call successors, (752), 157 states have call predecessors, (752), 155 states have return successors, (959), 714 states have call predecessors, (959), 743 states have call successors, (959) [2022-11-03 02:50:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3984 transitions. [2022-11-03 02:50:31,990 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3984 transitions. Word has length 102 [2022-11-03 02:50:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:31,991 INFO L495 AbstractCegarLoop]: Abstraction has 2509 states and 3984 transitions. [2022-11-03 02:50:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:50:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3984 transitions. [2022-11-03 02:50:32,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:50:32,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:32,004 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:32,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:50:32,004 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash 124080181, now seen corresponding path program 1 times [2022-11-03 02:50:32,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:32,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956855681] [2022-11-03 02:50:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:32,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:50:32,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956855681] [2022-11-03 02:50:32,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956855681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:32,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:32,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:50:32,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559873590] [2022-11-03 02:50:32,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:32,414 INFO L87 Difference]: Start difference. First operand 2509 states and 3984 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:50:34,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:35,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:38,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:39,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:40,786 INFO L93 Difference]: Finished difference Result 7296 states and 11575 transitions. [2022-11-03 02:50:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 102 [2022-11-03 02:50:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:40,823 INFO L225 Difference]: With dead ends: 7296 [2022-11-03 02:50:40,823 INFO L226 Difference]: Without dead ends: 4809 [2022-11-03 02:50:40,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:40,850 INFO L413 NwaCegarLoop]: 2408 mSDtfsCounter, 1946 mSDsluCounter, 2086 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1946 SdHoareTripleChecker+Valid, 4356 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1946 Valid, 4356 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-11-03 02:50:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4809 states. [2022-11-03 02:50:41,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4809 to 4787. [2022-11-03 02:50:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 3081 states have (on average 1.42486205777345) internal successors, (4390), 3223 states have internal predecessors, (4390), 1403 states have call successors, (1403), 305 states have call predecessors, (1403), 302 states have return successors, (1799), 1336 states have call predecessors, (1799), 1394 states have call successors, (1799) [2022-11-03 02:50:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7592 transitions. [2022-11-03 02:50:41,132 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7592 transitions. Word has length 102 [2022-11-03 02:50:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:41,133 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 7592 transitions. [2022-11-03 02:50:41,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:50:41,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7592 transitions. [2022-11-03 02:50:41,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 02:50:41,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:41,136 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:50:41,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash 402031346, now seen corresponding path program 1 times [2022-11-03 02:50:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886807675] [2022-11-03 02:50:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:50:41,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:41,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886807675] [2022-11-03 02:50:41,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886807675] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:41,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:50:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495008125] [2022-11-03 02:50:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:41,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:41,446 INFO L87 Difference]: Start difference. First operand 4787 states and 7592 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:50:45,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:47,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:48,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:48,952 INFO L93 Difference]: Finished difference Result 9399 states and 15916 transitions. [2022-11-03 02:50:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-11-03 02:50:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:49,019 INFO L225 Difference]: With dead ends: 9399 [2022-11-03 02:50:49,019 INFO L226 Difference]: Without dead ends: 9395 [2022-11-03 02:50:49,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:49,025 INFO L413 NwaCegarLoop]: 2479 mSDtfsCounter, 2042 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 4492 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:49,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 4492 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:50:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9395 states. [2022-11-03 02:50:49,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9395 to 9391. [2022-11-03 02:50:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9391 states, 6063 states have (on average 1.4270163285502226) internal successors, (8652), 6337 states have internal predecessors, (8652), 2741 states have call successors, (2741), 595 states have call predecessors, (2741), 586 states have return successors, (4511), 2612 states have call predecessors, (4511), 2732 states have call successors, (4511) [2022-11-03 02:50:49,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9391 states to 9391 states and 15904 transitions. [2022-11-03 02:50:49,652 INFO L78 Accepts]: Start accepts. Automaton has 9391 states and 15904 transitions. Word has length 105 [2022-11-03 02:50:49,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:49,655 INFO L495 AbstractCegarLoop]: Abstraction has 9391 states and 15904 transitions. [2022-11-03 02:50:49,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:50:49,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9391 states and 15904 transitions. [2022-11-03 02:50:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:50:49,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:49,665 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:50:49,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:50:49,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:49,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:49,667 INFO L85 PathProgramCache]: Analyzing trace with hash -422679013, now seen corresponding path program 1 times [2022-11-03 02:50:49,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:49,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992060669] [2022-11-03 02:50:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:49,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:50:49,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:49,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992060669] [2022-11-03 02:50:49,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992060669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:49,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:50:49,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:50:49,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051542163] [2022-11-03 02:50:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:49,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:50:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:50:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:49,998 INFO L87 Difference]: Start difference. First operand 9391 states and 15904 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:50:51,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:54,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:57,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:50:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:59,660 INFO L93 Difference]: Finished difference Result 18680 states and 31659 transitions. [2022-11-03 02:50:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:50:59,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 106 [2022-11-03 02:50:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:59,808 INFO L225 Difference]: With dead ends: 18680 [2022-11-03 02:50:59,809 INFO L226 Difference]: Without dead ends: 18677 [2022-11-03 02:50:59,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:50:59,824 INFO L413 NwaCegarLoop]: 2432 mSDtfsCounter, 1996 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1996 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:59,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1996 Valid, 4388 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 1 Unknown, 0 Unchecked, 9.0s Time] [2022-11-03 02:50:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18677 states. [2022-11-03 02:51:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18677 to 18669. [2022-11-03 02:51:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18669 states, 12063 states have (on average 1.4278371880958303) internal successors, (17224), 12605 states have internal predecessors, (17224), 5439 states have call successors, (5439), 1183 states have call predecessors, (5439), 1166 states have return successors, (8985), 5186 states have call predecessors, (8985), 5430 states have call successors, (8985) [2022-11-03 02:51:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18669 states to 18669 states and 31648 transitions. [2022-11-03 02:51:01,288 INFO L78 Accepts]: Start accepts. Automaton has 18669 states and 31648 transitions. Word has length 106 [2022-11-03 02:51:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:01,289 INFO L495 AbstractCegarLoop]: Abstraction has 18669 states and 31648 transitions. [2022-11-03 02:51:01,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18669 states and 31648 transitions. [2022-11-03 02:51:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 02:51:01,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:01,292 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:01,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:51:01,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:01,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -218891499, now seen corresponding path program 1 times [2022-11-03 02:51:01,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:01,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697986715] [2022-11-03 02:51:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:01,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:51:01,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:01,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697986715] [2022-11-03 02:51:01,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697986715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:01,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:01,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:01,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771885353] [2022-11-03 02:51:01,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:01,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:01,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:01,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:01,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:01,590 INFO L87 Difference]: Start difference. First operand 18669 states and 31648 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:03,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:06,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:08,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:10,969 INFO L93 Difference]: Finished difference Result 18682 states and 31661 transitions. [2022-11-03 02:51:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 107 [2022-11-03 02:51:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:11,079 INFO L225 Difference]: With dead ends: 18682 [2022-11-03 02:51:11,079 INFO L226 Difference]: Without dead ends: 18679 [2022-11-03 02:51:11,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:11,092 INFO L413 NwaCegarLoop]: 2442 mSDtfsCounter, 1993 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1993 SdHoareTripleChecker+Valid, 4401 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:11,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1993 Valid, 4401 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-03 02:51:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18679 states. [2022-11-03 02:51:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18679 to 18671. [2022-11-03 02:51:12,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18671 states, 12065 states have (on average 1.427766266058848) internal successors, (17226), 12607 states have internal predecessors, (17226), 5439 states have call successors, (5439), 1183 states have call predecessors, (5439), 1166 states have return successors, (8985), 5186 states have call predecessors, (8985), 5430 states have call successors, (8985) [2022-11-03 02:51:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18671 states to 18671 states and 31650 transitions. [2022-11-03 02:51:12,474 INFO L78 Accepts]: Start accepts. Automaton has 18671 states and 31650 transitions. Word has length 107 [2022-11-03 02:51:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:12,474 INFO L495 AbstractCegarLoop]: Abstraction has 18671 states and 31650 transitions. [2022-11-03 02:51:12,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:12,475 INFO L276 IsEmpty]: Start isEmpty. Operand 18671 states and 31650 transitions. [2022-11-03 02:51:12,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 02:51:12,478 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:12,478 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:12,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:51:12,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:12,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1803559006, now seen corresponding path program 1 times [2022-11-03 02:51:12,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:12,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381487941] [2022-11-03 02:51:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:12,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:51:12,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381487941] [2022-11-03 02:51:12,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381487941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:12,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:12,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:12,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947982457] [2022-11-03 02:51:12,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:12,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:12,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:12,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:12,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:12,753 INFO L87 Difference]: Start difference. First operand 18671 states and 31650 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:14,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:18,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:19,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:22,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:23,410 INFO L93 Difference]: Finished difference Result 18684 states and 31662 transitions. [2022-11-03 02:51:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2022-11-03 02:51:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:23,514 INFO L225 Difference]: With dead ends: 18684 [2022-11-03 02:51:23,514 INFO L226 Difference]: Without dead ends: 18675 [2022-11-03 02:51:23,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:23,530 INFO L413 NwaCegarLoop]: 2424 mSDtfsCounter, 1989 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 4386 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:23,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1989 Valid, 4386 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2022-11-03 02:51:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18675 states. [2022-11-03 02:51:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18675 to 18667. [2022-11-03 02:51:24,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18667 states, 12061 states have (on average 1.4276593980598624) internal successors, (17219), 12604 states have internal predecessors, (17219), 5439 states have call successors, (5439), 1183 states have call predecessors, (5439), 1166 states have return successors, (8981), 5185 states have call predecessors, (8981), 5430 states have call successors, (8981) [2022-11-03 02:51:25,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18667 states to 18667 states and 31639 transitions. [2022-11-03 02:51:25,070 INFO L78 Accepts]: Start accepts. Automaton has 18667 states and 31639 transitions. Word has length 108 [2022-11-03 02:51:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:25,070 INFO L495 AbstractCegarLoop]: Abstraction has 18667 states and 31639 transitions. [2022-11-03 02:51:25,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:25,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18667 states and 31639 transitions. [2022-11-03 02:51:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:51:25,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:25,074 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:25,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:51:25,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:25,075 INFO L85 PathProgramCache]: Analyzing trace with hash 954291552, now seen corresponding path program 1 times [2022-11-03 02:51:25,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:25,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179307378] [2022-11-03 02:51:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:25,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-03 02:51:25,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:25,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179307378] [2022-11-03 02:51:25,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179307378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:25,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:25,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:25,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629976004] [2022-11-03 02:51:25,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:25,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:25,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:25,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:25,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:25,454 INFO L87 Difference]: Start difference. First operand 18667 states and 31639 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:27,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:31,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:33,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:34,481 INFO L93 Difference]: Finished difference Result 18965 states and 31964 transitions. [2022-11-03 02:51:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:34,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 114 [2022-11-03 02:51:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:34,581 INFO L225 Difference]: With dead ends: 18965 [2022-11-03 02:51:34,582 INFO L226 Difference]: Without dead ends: 18962 [2022-11-03 02:51:34,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:34,597 INFO L413 NwaCegarLoop]: 2006 mSDtfsCounter, 219 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:34,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 3817 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 287 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2022-11-03 02:51:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18962 states. [2022-11-03 02:51:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18962 to 18962. [2022-11-03 02:51:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18962 states, 12217 states have (on average 1.4235082262421217) internal successors, (17391), 12775 states have internal predecessors, (17391), 5510 states have call successors, (5510), 1251 states have call predecessors, (5510), 1234 states have return successors, (9053), 5257 states have call predecessors, (9053), 5502 states have call successors, (9053) [2022-11-03 02:51:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18962 states to 18962 states and 31954 transitions. [2022-11-03 02:51:36,287 INFO L78 Accepts]: Start accepts. Automaton has 18962 states and 31954 transitions. Word has length 114 [2022-11-03 02:51:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:36,287 INFO L495 AbstractCegarLoop]: Abstraction has 18962 states and 31954 transitions. [2022-11-03 02:51:36,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 02:51:36,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18962 states and 31954 transitions. [2022-11-03 02:51:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 02:51:36,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:36,297 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:36,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:51:36,298 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash 104492166, now seen corresponding path program 1 times [2022-11-03 02:51:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:36,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618252612] [2022-11-03 02:51:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-03 02:51:36,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618252612] [2022-11-03 02:51:36,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618252612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:36,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:51:36,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:51:36,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118506254] [2022-11-03 02:51:36,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:36,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:51:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:36,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:51:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:36,710 INFO L87 Difference]: Start difference. First operand 18962 states and 31954 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:51:38,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:40,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:43,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:51:45,300 INFO L93 Difference]: Finished difference Result 18980 states and 31963 transitions. [2022-11-03 02:51:45,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:51:45,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 133 [2022-11-03 02:51:45,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:51:45,400 INFO L225 Difference]: With dead ends: 18980 [2022-11-03 02:51:45,400 INFO L226 Difference]: Without dead ends: 18977 [2022-11-03 02:51:45,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:51:45,414 INFO L413 NwaCegarLoop]: 1988 mSDtfsCounter, 10 mSDsluCounter, 2111 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3960 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:51:45,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3960 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 292 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2022-11-03 02:51:45,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18977 states. [2022-11-03 02:51:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18977 to 18977. [2022-11-03 02:51:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18977 states, 12225 states have (on average 1.4225766871165644) internal successors, (17391), 12782 states have internal predecessors, (17391), 5509 states have call successors, (5509), 1259 states have call predecessors, (5509), 1242 states have return successors, (9053), 5257 states have call predecessors, (9053), 5502 states have call successors, (9053) [2022-11-03 02:51:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18977 states to 18977 states and 31953 transitions. [2022-11-03 02:51:46,790 INFO L78 Accepts]: Start accepts. Automaton has 18977 states and 31953 transitions. Word has length 133 [2022-11-03 02:51:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:51:46,791 INFO L495 AbstractCegarLoop]: Abstraction has 18977 states and 31953 transitions. [2022-11-03 02:51:46,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 02:51:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 18977 states and 31953 transitions. [2022-11-03 02:51:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-03 02:51:46,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:51:46,828 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:51:46,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:51:46,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:51:46,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:51:46,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1592035432, now seen corresponding path program 1 times [2022-11-03 02:51:46,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:51:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558539093] [2022-11-03 02:51:46,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:46,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:51:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 02:51:50,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:51:50,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558539093] [2022-11-03 02:51:50,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558539093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:51:50,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280621968] [2022-11-03 02:51:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:51:50,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:51:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:51:50,434 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:51:50,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:51:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:51:51,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 5003 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:51:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:51:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-03 02:51:52,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:51:52,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280621968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:51:52,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:51:52,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2022-11-03 02:51:52,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851759190] [2022-11-03 02:51:52,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:51:52,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:51:52,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:51:52,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:51:52,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:51:52,098 INFO L87 Difference]: Start difference. First operand 18977 states and 31953 transitions. Second operand has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 4 states have call successors, (52), 5 states have call predecessors, (52), 2 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-03 02:51:53,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:54,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:56,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:51:58,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:01,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:07,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:09,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:10,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:12,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:14,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:16,141 INFO L93 Difference]: Finished difference Result 37362 states and 64071 transitions. [2022-11-03 02:52:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:52:16,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 4 states have call successors, (52), 5 states have call predecessors, (52), 2 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) Word has length 269 [2022-11-03 02:52:16,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:16,281 INFO L225 Difference]: With dead ends: 37362 [2022-11-03 02:52:16,282 INFO L226 Difference]: Without dead ends: 18349 [2022-11-03 02:52:16,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:52:16,610 INFO L413 NwaCegarLoop]: 1951 mSDtfsCounter, 27 mSDsluCounter, 10404 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 11661 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:16,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 11661 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 3 Unknown, 0 Unchecked, 22.9s Time] [2022-11-03 02:52:16,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18349 states. [2022-11-03 02:52:17,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18349 to 18349. [2022-11-03 02:52:17,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18349 states, 11979 states have (on average 1.420402370815594) internal successors, (17015), 12461 states have internal predecessors, (17015), 5213 states have call successors, (5213), 1189 states have call predecessors, (5213), 1156 states have return successors, (6571), 5004 states have call predecessors, (6571), 5206 states have call successors, (6571) [2022-11-03 02:52:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18349 states to 18349 states and 28799 transitions. [2022-11-03 02:52:17,960 INFO L78 Accepts]: Start accepts. Automaton has 18349 states and 28799 transitions. Word has length 269 [2022-11-03 02:52:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:17,961 INFO L495 AbstractCegarLoop]: Abstraction has 18349 states and 28799 transitions. [2022-11-03 02:52:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 20.333333333333332) internal successors, (122), 5 states have internal predecessors, (122), 4 states have call successors, (52), 5 states have call predecessors, (52), 2 states have return successors, (43), 3 states have call predecessors, (43), 3 states have call successors, (43) [2022-11-03 02:52:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 18349 states and 28799 transitions. [2022-11-03 02:52:17,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 02:52:17,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:17,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:18,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:52:18,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:52:18,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:18,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:18,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1401570898, now seen corresponding path program 1 times [2022-11-03 02:52:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:18,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932441344] [2022-11-03 02:52:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:18,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-03 02:52:19,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932441344] [2022-11-03 02:52:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932441344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:19,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:19,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816530709] [2022-11-03 02:52:19,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:19,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:19,597 INFO L87 Difference]: Start difference. First operand 18349 states and 28799 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:52:20,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:23,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:25,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:27,225 INFO L93 Difference]: Finished difference Result 22886 states and 36067 transitions. [2022-11-03 02:52:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:27,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 196 [2022-11-03 02:52:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:27,356 INFO L225 Difference]: With dead ends: 22886 [2022-11-03 02:52:27,356 INFO L226 Difference]: Without dead ends: 22821 [2022-11-03 02:52:27,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:27,377 INFO L413 NwaCegarLoop]: 2459 mSDtfsCounter, 1961 mSDsluCounter, 2051 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1961 SdHoareTripleChecker+Valid, 4377 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:27,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1961 Valid, 4377 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-03 02:52:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22821 states. [2022-11-03 02:52:28,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22821 to 22709. [2022-11-03 02:52:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22709 states, 14823 states have (on average 1.4235309991229845) internal successors, (21101), 15423 states have internal predecessors, (21101), 6457 states have call successors, (6457), 1457 states have call predecessors, (6457), 1428 states have return successors, (8271), 6210 states have call predecessors, (8271), 6450 states have call successors, (8271) [2022-11-03 02:52:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22709 states to 22709 states and 35829 transitions. [2022-11-03 02:52:28,752 INFO L78 Accepts]: Start accepts. Automaton has 22709 states and 35829 transitions. Word has length 196 [2022-11-03 02:52:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:28,753 INFO L495 AbstractCegarLoop]: Abstraction has 22709 states and 35829 transitions. [2022-11-03 02:52:28,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:52:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 22709 states and 35829 transitions. [2022-11-03 02:52:28,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-03 02:52:28,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:28,781 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:52:28,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:52:28,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:28,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:28,782 INFO L85 PathProgramCache]: Analyzing trace with hash -370309827, now seen corresponding path program 1 times [2022-11-03 02:52:28,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:28,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090429546] [2022-11-03 02:52:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:28,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-03 02:52:29,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:29,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090429546] [2022-11-03 02:52:29,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090429546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:29,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:29,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439771862] [2022-11-03 02:52:29,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:29,312 INFO L87 Difference]: Start difference. First operand 22709 states and 35829 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:52:30,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:33,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:37,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:37,913 INFO L93 Difference]: Finished difference Result 45443 states and 71696 transitions. [2022-11-03 02:52:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:52:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 191 [2022-11-03 02:52:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:38,032 INFO L225 Difference]: With dead ends: 45443 [2022-11-03 02:52:38,032 INFO L226 Difference]: Without dead ends: 22752 [2022-11-03 02:52:38,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:38,198 INFO L413 NwaCegarLoop]: 1968 mSDtfsCounter, 17 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3931 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:38,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3931 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2022-11-03 02:52:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22752 states. [2022-11-03 02:52:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22752 to 22714. [2022-11-03 02:52:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22714 states, 14828 states have (on average 1.423118424602104) internal successors, (21102), 15428 states have internal predecessors, (21102), 6457 states have call successors, (6457), 1457 states have call predecessors, (6457), 1428 states have return successors, (8271), 6210 states have call predecessors, (8271), 6450 states have call successors, (8271) [2022-11-03 02:52:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22714 states to 22714 states and 35830 transitions. [2022-11-03 02:52:39,713 INFO L78 Accepts]: Start accepts. Automaton has 22714 states and 35830 transitions. Word has length 191 [2022-11-03 02:52:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:39,715 INFO L495 AbstractCegarLoop]: Abstraction has 22714 states and 35830 transitions. [2022-11-03 02:52:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2022-11-03 02:52:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 22714 states and 35830 transitions. [2022-11-03 02:52:39,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-03 02:52:39,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:39,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:52:39,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:52:39,738 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:39,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:39,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1896430335, now seen corresponding path program 1 times [2022-11-03 02:52:39,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:39,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82881595] [2022-11-03 02:52:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-03 02:52:40,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:40,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82881595] [2022-11-03 02:52:40,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82881595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:40,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:40,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:52:40,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109015771] [2022-11-03 02:52:40,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:40,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:52:40,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:52:40,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:52:40,859 INFO L87 Difference]: Start difference. First operand 22714 states and 35830 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:52:43,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:47,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:51,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:52:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:52:56,228 INFO L93 Difference]: Finished difference Result 31660 states and 51919 transitions. [2022-11-03 02:52:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:52:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 196 [2022-11-03 02:52:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:52:56,363 INFO L225 Difference]: With dead ends: 31660 [2022-11-03 02:52:56,363 INFO L226 Difference]: Without dead ends: 31532 [2022-11-03 02:52:56,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:52:56,380 INFO L413 NwaCegarLoop]: 1872 mSDtfsCounter, 3502 mSDsluCounter, 2015 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 1812 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3687 SdHoareTripleChecker+Valid, 3745 SdHoareTripleChecker+Invalid, 3944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1812 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:52:56,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3687 Valid, 3745 Invalid, 3944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1812 Valid, 2129 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2022-11-03 02:52:56,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31532 states. [2022-11-03 02:52:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31532 to 31026. [2022-11-03 02:52:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31026 states, 20568 states have (on average 1.4314469078179697) internal successors, (29442), 21265 states have internal predecessors, (29442), 8516 states have call successors, (8516), 1857 states have call predecessors, (8516), 1941 states have return successors, (12720), 8333 states have call predecessors, (12720), 8509 states have call successors, (12720) [2022-11-03 02:52:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31026 states to 31026 states and 50678 transitions. [2022-11-03 02:52:58,399 INFO L78 Accepts]: Start accepts. Automaton has 31026 states and 50678 transitions. Word has length 196 [2022-11-03 02:52:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:52:58,400 INFO L495 AbstractCegarLoop]: Abstraction has 31026 states and 50678 transitions. [2022-11-03 02:52:58,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 4 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:52:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 31026 states and 50678 transitions. [2022-11-03 02:52:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-11-03 02:52:58,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:52:58,426 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:52:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:52:58,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:52:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:52:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash 685908220, now seen corresponding path program 1 times [2022-11-03 02:52:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:52:58,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377073] [2022-11-03 02:52:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:52:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:52:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:52:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:52:59,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:52:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377073] [2022-11-03 02:52:59,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377073] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:52:59,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:52:59,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:52:59,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353825119] [2022-11-03 02:52:59,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:52:59,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:52:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:52:59,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:52:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:52:59,066 INFO L87 Difference]: Start difference. First operand 31026 states and 50678 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:53:01,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:04,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:05,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:08,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:09,559 INFO L93 Difference]: Finished difference Result 55969 states and 92795 transitions. [2022-11-03 02:53:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 215 [2022-11-03 02:53:09,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:09,753 INFO L225 Difference]: With dead ends: 55969 [2022-11-03 02:53:09,753 INFO L226 Difference]: Without dead ends: 34125 [2022-11-03 02:53:09,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:09,874 INFO L413 NwaCegarLoop]: 2233 mSDtfsCounter, 264 mSDsluCounter, 2051 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 4155 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:09,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 4155 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 2 Unknown, 0 Unchecked, 8.9s Time] [2022-11-03 02:53:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34125 states. [2022-11-03 02:53:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34125 to 31026. [2022-11-03 02:53:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31026 states, 20568 states have (on average 1.4313982886036563) internal successors, (29441), 21264 states have internal predecessors, (29441), 8516 states have call successors, (8516), 1857 states have call predecessors, (8516), 1941 states have return successors, (12720), 8333 states have call predecessors, (12720), 8509 states have call successors, (12720) [2022-11-03 02:53:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31026 states to 31026 states and 50677 transitions. [2022-11-03 02:53:11,740 INFO L78 Accepts]: Start accepts. Automaton has 31026 states and 50677 transitions. Word has length 215 [2022-11-03 02:53:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:11,740 INFO L495 AbstractCegarLoop]: Abstraction has 31026 states and 50677 transitions. [2022-11-03 02:53:11,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:53:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 31026 states and 50677 transitions. [2022-11-03 02:53:11,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-03 02:53:11,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:11,753 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 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] [2022-11-03 02:53:11,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:53:11,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:11,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1858065603, now seen corresponding path program 1 times [2022-11-03 02:53:11,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:11,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568248238] [2022-11-03 02:53:11,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-03 02:53:12,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:12,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568248238] [2022-11-03 02:53:12,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568248238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:12,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:12,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070324242] [2022-11-03 02:53:12,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:12,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:12,369 INFO L87 Difference]: Start difference. First operand 31026 states and 50677 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:53:14,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:20,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:21,257 INFO L93 Difference]: Finished difference Result 38163 states and 62104 transitions. [2022-11-03 02:53:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:21,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 219 [2022-11-03 02:53:21,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:21,462 INFO L225 Difference]: With dead ends: 38163 [2022-11-03 02:53:21,462 INFO L226 Difference]: Without dead ends: 38159 [2022-11-03 02:53:21,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:21,491 INFO L413 NwaCegarLoop]: 3570 mSDtfsCounter, 2082 mSDsluCounter, 1932 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2082 SdHoareTripleChecker+Valid, 5381 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:21,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2082 Valid, 5381 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-03 02:53:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38159 states. [2022-11-03 02:53:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38159 to 37954. [2022-11-03 02:53:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37954 states, 25058 states have (on average 1.429882672200495) internal successors, (35830), 25918 states have internal predecessors, (35830), 10490 states have call successors, (10490), 2295 states have call predecessors, (10490), 2405 states have return successors, (15393), 10291 states have call predecessors, (15393), 10485 states have call successors, (15393) [2022-11-03 02:53:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37954 states to 37954 states and 61713 transitions. [2022-11-03 02:53:23,646 INFO L78 Accepts]: Start accepts. Automaton has 37954 states and 61713 transitions. Word has length 219 [2022-11-03 02:53:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:23,647 INFO L495 AbstractCegarLoop]: Abstraction has 37954 states and 61713 transitions. [2022-11-03 02:53:23,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:53:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 37954 states and 61713 transitions. [2022-11-03 02:53:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-03 02:53:23,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:23,676 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:23,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:53:23,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1731605472, now seen corresponding path program 1 times [2022-11-03 02:53:23,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:23,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829642583] [2022-11-03 02:53:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:23,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2022-11-03 02:53:25,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829642583] [2022-11-03 02:53:25,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829642583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:53:25,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127693638] [2022-11-03 02:53:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:53:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:53:25,326 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:53:25,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:53:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 4323 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:53:26,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:53:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2022-11-03 02:53:27,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:53:27,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127693638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:27,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:53:27,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:53:27,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698414138] [2022-11-03 02:53:27,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:27,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:27,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:27,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:27,243 INFO L87 Difference]: Start difference. First operand 37954 states and 61713 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-03 02:53:29,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:32,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:34,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:35,593 INFO L93 Difference]: Finished difference Result 37956 states and 61714 transitions. [2022-11-03 02:53:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:35,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) Word has length 219 [2022-11-03 02:53:35,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:35,774 INFO L225 Difference]: With dead ends: 37956 [2022-11-03 02:53:35,774 INFO L226 Difference]: Without dead ends: 37951 [2022-11-03 02:53:35,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:53:35,800 INFO L413 NwaCegarLoop]: 1982 mSDtfsCounter, 1775 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:35,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1775 Valid, 2189 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2022-11-03 02:53:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37951 states. [2022-11-03 02:53:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37951 to 37848. [2022-11-03 02:53:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37848 states, 25026 states have (on average 1.4298329737073443) internal successors, (35783), 25825 states have internal predecessors, (35783), 10416 states have call successors, (10416), 2283 states have call predecessors, (10416), 2405 states have return successors, (15321), 10290 states have call predecessors, (15321), 10413 states have call successors, (15321) [2022-11-03 02:53:37,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37848 states to 37848 states and 61520 transitions. [2022-11-03 02:53:37,805 INFO L78 Accepts]: Start accepts. Automaton has 37848 states and 61520 transitions. Word has length 219 [2022-11-03 02:53:37,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:37,805 INFO L495 AbstractCegarLoop]: Abstraction has 37848 states and 61520 transitions. [2022-11-03 02:53:37,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 1 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-03 02:53:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37848 states and 61520 transitions. [2022-11-03 02:53:37,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-03 02:53:37,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:37,833 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2022-11-03 02:53:37,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:53:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5ba6258-4fd7-435a-b5d6-269ef0c805de/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:53:38,061 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 36996387, now seen corresponding path program 1 times [2022-11-03 02:53:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:38,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293474112] [2022-11-03 02:53:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:38,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-03 02:53:38,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:38,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293474112] [2022-11-03 02:53:38,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293474112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:38,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:38,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:38,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43017663] [2022-11-03 02:53:38,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:38,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:38,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:38,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:38,620 INFO L87 Difference]: Start difference. First operand 37848 states and 61520 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:53:40,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:42,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:44,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:46,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:48,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:53:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:53:52,582 INFO L93 Difference]: Finished difference Result 87231 states and 141187 transitions. [2022-11-03 02:53:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:53:52,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 223 [2022-11-03 02:53:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:53:53,097 INFO L225 Difference]: With dead ends: 87231 [2022-11-03 02:53:53,097 INFO L226 Difference]: Without dead ends: 41958 [2022-11-03 02:53:53,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:53,382 INFO L413 NwaCegarLoop]: 3573 mSDtfsCounter, 1964 mSDsluCounter, 1808 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 5272 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:53:53,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1968 Valid, 5272 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 362 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2022-11-03 02:53:53,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41958 states. [2022-11-03 02:53:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41958 to 41958. [2022-11-03 02:53:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41958 states, 27734 states have (on average 1.4256508257013052) internal successors, (39539), 28622 states have internal predecessors, (39539), 11510 states have call successors, (11510), 2567 states have call predecessors, (11510), 2713 states have return successors, (16613), 11354 states have call predecessors, (16613), 11507 states have call successors, (16613) [2022-11-03 02:53:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41958 states to 41958 states and 67662 transitions. [2022-11-03 02:53:56,162 INFO L78 Accepts]: Start accepts. Automaton has 41958 states and 67662 transitions. Word has length 223 [2022-11-03 02:53:56,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:53:56,162 INFO L495 AbstractCegarLoop]: Abstraction has 41958 states and 67662 transitions. [2022-11-03 02:53:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-03 02:53:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 41958 states and 67662 transitions. [2022-11-03 02:53:56,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-11-03 02:53:56,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:53:56,258 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:53:56,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:53:56,259 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:53:56,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:53:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash 530643902, now seen corresponding path program 1 times [2022-11-03 02:53:56,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:53:56,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570645151] [2022-11-03 02:53:56,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:53:56,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:53:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:53:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-03 02:53:56,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:53:56,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570645151] [2022-11-03 02:53:56,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570645151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:53:56,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:53:56,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:53:56,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201419413] [2022-11-03 02:53:56,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:53:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:53:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:53:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:53:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:53:56,760 INFO L87 Difference]: Start difference. First operand 41958 states and 67662 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:53:58,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:00,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:02,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:04,210 INFO L93 Difference]: Finished difference Result 41960 states and 67663 transitions. [2022-11-03 02:54:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:04,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 283 [2022-11-03 02:54:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:04,436 INFO L225 Difference]: With dead ends: 41960 [2022-11-03 02:54:04,437 INFO L226 Difference]: Without dead ends: 41957 [2022-11-03 02:54:04,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:04,470 INFO L413 NwaCegarLoop]: 1939 mSDtfsCounter, 1987 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1987 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:04,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1987 Valid, 1939 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:54:04,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41957 states. [2022-11-03 02:54:07,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41957 to 41957. [2022-11-03 02:54:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41957 states, 27734 states have (on average 1.4256147688757481) internal successors, (39538), 28621 states have internal predecessors, (39538), 11509 states have call successors, (11509), 2567 states have call predecessors, (11509), 2713 states have return successors, (16613), 11354 states have call predecessors, (16613), 11507 states have call successors, (16613) [2022-11-03 02:54:07,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41957 states to 41957 states and 67660 transitions. [2022-11-03 02:54:07,413 INFO L78 Accepts]: Start accepts. Automaton has 41957 states and 67660 transitions. Word has length 283 [2022-11-03 02:54:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:07,414 INFO L495 AbstractCegarLoop]: Abstraction has 41957 states and 67660 transitions. [2022-11-03 02:54:07,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:54:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 41957 states and 67660 transitions. [2022-11-03 02:54:07,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 02:54:07,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:07,515 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:54:07,516 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash -730652206, now seen corresponding path program 1 times [2022-11-03 02:54:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:07,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659296425] [2022-11-03 02:54:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-03 02:54:07,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:07,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659296425] [2022-11-03 02:54:07,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659296425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:07,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:07,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:54:07,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508449637] [2022-11-03 02:54:07,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:07,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:54:07,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:54:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:07,978 INFO L87 Difference]: Start difference. First operand 41957 states and 67660 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:54:10,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:12,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:14,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:16,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:16,513 INFO L93 Difference]: Finished difference Result 41959 states and 67661 transitions. [2022-11-03 02:54:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 284 [2022-11-03 02:54:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:16,774 INFO L225 Difference]: With dead ends: 41959 [2022-11-03 02:54:16,774 INFO L226 Difference]: Without dead ends: 41956 [2022-11-03 02:54:16,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:16,803 INFO L413 NwaCegarLoop]: 1937 mSDtfsCounter, 1984 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1984 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:16,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1984 Valid, 1937 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-03 02:54:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41956 states. [2022-11-03 02:54:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41956 to 41956. [2022-11-03 02:54:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41956 states, 27734 states have (on average 1.425578712050191) internal successors, (39537), 28620 states have internal predecessors, (39537), 11508 states have call successors, (11508), 2567 states have call predecessors, (11508), 2713 states have return successors, (16613), 11354 states have call predecessors, (16613), 11507 states have call successors, (16613) [2022-11-03 02:54:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41956 states to 41956 states and 67658 transitions. [2022-11-03 02:54:19,546 INFO L78 Accepts]: Start accepts. Automaton has 41956 states and 67658 transitions. Word has length 284 [2022-11-03 02:54:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:19,547 INFO L495 AbstractCegarLoop]: Abstraction has 41956 states and 67658 transitions. [2022-11-03 02:54:19,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:54:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 41956 states and 67658 transitions. [2022-11-03 02:54:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-11-03 02:54:19,651 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:54:19,651 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:54:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-03 02:54:19,651 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:54:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:54:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1176121023, now seen corresponding path program 1 times [2022-11-03 02:54:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:54:19,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923026940] [2022-11-03 02:54:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:54:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:54:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:54:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-03 02:54:20,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:54:20,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923026940] [2022-11-03 02:54:20,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923026940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:54:20,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:54:20,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:54:20,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824088257] [2022-11-03 02:54:20,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:54:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:54:20,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:54:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:54:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:20,111 INFO L87 Difference]: Start difference. First operand 41956 states and 67658 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:54:22,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:26,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:54:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:54:28,221 INFO L93 Difference]: Finished difference Result 41956 states and 67658 transitions. [2022-11-03 02:54:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:54:28,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 285 [2022-11-03 02:54:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:54:28,228 INFO L225 Difference]: With dead ends: 41956 [2022-11-03 02:54:28,228 INFO L226 Difference]: Without dead ends: 0 [2022-11-03 02:54:28,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:54:28,410 INFO L413 NwaCegarLoop]: 1935 mSDtfsCounter, 1980 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1980 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:54:28,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1980 Valid, 1935 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 139 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 02:54:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-03 02:54:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-03 02:54:28,411 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) [2022-11-03 02:54:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-03 02:54:28,415 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 285 [2022-11-03 02:54:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:54:28,415 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-03 02:54:28,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2022-11-03 02:54:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-03 02:54:28,416 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-03 02:54:28,418 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:54:28,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:54:28,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.