./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/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_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/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_14d35244-316b-4220-9c7c-c1227482ddce/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 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 --- 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 02:39:05,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:39:05,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:39:05,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:39:05,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:39:05,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:39:05,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:39:05,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:39:05,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:39:05,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:39:05,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:39:05,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:39:05,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:39:05,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:39:05,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:39:05,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:39:05,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:39:05,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:39:05,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:39:05,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:39:05,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:39:05,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:39:05,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:39:05,708 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:39:05,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:39:05,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:39:05,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:39:05,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:39:05,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:39:05,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:39:05,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:39:05,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:39:05,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:39:05,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:39:05,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:39:05,731 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:39:05,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:39:05,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:39:05,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:39:05,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:39:05,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:39:05,737 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:39:05,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:39:05,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:39:05,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:39:05,791 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:39:05,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:39:05,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:39:05,792 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:39:05,793 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:39:05,793 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:39:05,793 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:39:05,794 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:39:05,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:39:05,795 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:39:05,795 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:39:05,795 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:39:05,796 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:39:05,796 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:39:05,796 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:39:05,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:39:05,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:39:05,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:39:05,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:39:05,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:39:05,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:39:05,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:39:05,799 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:39:05,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:39:05,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:39:05,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:39:05,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:05,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:39:05,801 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:39:05,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:39:05,801 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:39:05,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:39:05,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:39:05,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:39:05,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:39:05,803 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_14d35244-316b-4220-9c7c-c1227482ddce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2022-11-03 02:39:06,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:39:06,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:39:06,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:39:06,187 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:39:06,188 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:39:06,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-03 02:39:06,262 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/data/ef9f1e89b/50d51c0d31e34122842e038518bcfd6b/FLAG5b3c5d626 [2022-11-03 02:39:07,255 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:39:07,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-03 02:39:07,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/data/ef9f1e89b/50d51c0d31e34122842e038518bcfd6b/FLAG5b3c5d626 [2022-11-03 02:39:07,720 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/data/ef9f1e89b/50d51c0d31e34122842e038518bcfd6b [2022-11-03 02:39:07,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:39:07,725 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:39:07,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:07,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:39:07,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:39:07,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:07" (1/1) ... [2022-11-03 02:39:07,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e025376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:07, skipping insertion in model container [2022-11-03 02:39:07,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:39:07" (1/1) ... [2022-11-03 02:39:07,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:39:07,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:39:09,135 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_14d35244-316b-4220-9c7c-c1227482ddce/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2022-11-03 02:39:09,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:09,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:39:09,709 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_14d35244-316b-4220-9c7c-c1227482ddce/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2022-11-03 02:39:09,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:39:10,022 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:39:10,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10 WrapperNode [2022-11-03 02:39:10,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:39:10,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:10,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:39:10,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:39:10,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,384 INFO L138 Inliner]: procedures = 115, calls = 2009, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5217 [2022-11-03 02:39:10,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:39:10,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:39:10,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:39:10,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:39:10,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,678 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:39:10,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:39:10,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:39:10,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:39:10,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (1/1) ... [2022-11-03 02:39:10,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:39:10,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:10,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:39:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:39:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2022-11-03 02:39:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2022-11-03 02:39:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:39:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-03 02:39:10,822 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-03 02:39:10,822 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2022-11-03 02:39:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2022-11-03 02:39:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2022-11-03 02:39:10,823 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2022-11-03 02:39:10,823 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2022-11-03 02:39:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2022-11-03 02:39:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2022-11-03 02:39:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2022-11-03 02:39:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2022-11-03 02:39:10,824 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2022-11-03 02:39:10,824 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:39:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:39:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2022-11-03 02:39:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2022-11-03 02:39:10,825 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2022-11-03 02:39:10,825 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2022-11-03 02:39:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2022-11-03 02:39:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2022-11-03 02:39:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:39:10,826 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-03 02:39:10,826 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-03 02:39:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:39:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:39:10,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:39:10,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:39:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:39:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-03 02:39:10,828 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-03 02:39:10,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:39:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:39:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:39:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2022-11-03 02:39:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2022-11-03 02:39:10,829 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2022-11-03 02:39:10,829 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2022-11-03 02:39:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:39:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:39:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:39:10,830 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2022-11-03 02:39:10,830 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2022-11-03 02:39:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:39:10,831 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2022-11-03 02:39:10,832 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2022-11-03 02:39:10,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:39:10,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:39:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2022-11-03 02:39:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2022-11-03 02:39:10,834 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-03 02:39:10,834 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-03 02:39:11,612 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:39:11,615 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:39:17,988 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:39:20,591 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:39:20,592 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:39:20,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:20 BoogieIcfgContainer [2022-11-03 02:39:20,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:39:20,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:39:20,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:39:20,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:39:20,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:39:07" (1/3) ... [2022-11-03 02:39:20,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:20, skipping insertion in model container [2022-11-03 02:39:20,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:39:10" (2/3) ... [2022-11-03 02:39:20,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63596c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:39:20, skipping insertion in model container [2022-11-03 02:39:20,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:39:20" (3/3) ... [2022-11-03 02:39:20,612 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-03 02:39:20,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:39:20,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:39:20,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:39:20,753 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;@7a158cfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:39:20,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:39:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 867 states, 662 states have (on average 1.6752265861027191) internal successors, (1109), 669 states have internal predecessors, (1109), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2022-11-03 02:39:20,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:39:20,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:20,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 02:39:20,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash 820884889, now seen corresponding path program 1 times [2022-11-03 02:39:20,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:20,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537251874] [2022-11-03 02:39:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:22,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:22,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537251874] [2022-11-03 02:39:22,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537251874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:22,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:22,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:22,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656428404] [2022-11-03 02:39:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:22,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:22,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:22,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:22,113 INFO L87 Difference]: Start difference. First operand has 867 states, 662 states have (on average 1.6752265861027191) internal successors, (1109), 669 states have internal predecessors, (1109), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:39:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:23,272 INFO L93 Difference]: Finished difference Result 2592 states and 4569 transitions. [2022-11-03 02:39:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:23,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-03 02:39:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:23,304 INFO L225 Difference]: With dead ends: 2592 [2022-11-03 02:39:23,304 INFO L226 Difference]: Without dead ends: 1722 [2022-11-03 02:39:23,315 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 02:39:23,319 INFO L413 NwaCegarLoop]: 1517 mSDtfsCounter, 1448 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 2855 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:23,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 2855 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:39:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2022-11-03 02:39:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1709. [2022-11-03 02:39:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1311 states have (on average 1.673531655225019) internal successors, (2194), 1316 states have internal predecessors, (2194), 357 states have call successors, (357), 41 states have call predecessors, (357), 40 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2022-11-03 02:39:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2902 transitions. [2022-11-03 02:39:23,528 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2902 transitions. Word has length 29 [2022-11-03 02:39:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:23,528 INFO L495 AbstractCegarLoop]: Abstraction has 1709 states and 2902 transitions. [2022-11-03 02:39:23,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:39:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2902 transitions. [2022-11-03 02:39:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:39:23,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:23,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 02:39:23,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:39:23,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:23,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:23,533 INFO L85 PathProgramCache]: Analyzing trace with hash 102839054, now seen corresponding path program 1 times [2022-11-03 02:39:23,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:23,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408942866] [2022-11-03 02:39:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:23,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:24,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408942866] [2022-11-03 02:39:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408942866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:24,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:24,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:39:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043838727] [2022-11-03 02:39:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:24,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:24,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:24,259 INFO L87 Difference]: Start difference. First operand 1709 states and 2902 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:39:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:26,692 INFO L93 Difference]: Finished difference Result 5116 states and 8688 transitions. [2022-11-03 02:39:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:26,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-03 02:39:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:26,718 INFO L225 Difference]: With dead ends: 5116 [2022-11-03 02:39:26,718 INFO L226 Difference]: Without dead ends: 3408 [2022-11-03 02:39:26,727 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 02:39:26,728 INFO L413 NwaCegarLoop]: 1522 mSDtfsCounter, 1445 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:26,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1445 Valid, 2859 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-03 02:39:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2022-11-03 02:39:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 3395. [2022-11-03 02:39:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2608 states have (on average 1.6733128834355828) internal successors, (4364), 2613 states have internal predecessors, (4364), 706 states have call successors, (706), 81 states have call predecessors, (706), 80 states have return successors, (700), 700 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-03 02:39:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5770 transitions. [2022-11-03 02:39:27,070 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5770 transitions. Word has length 30 [2022-11-03 02:39:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:27,070 INFO L495 AbstractCegarLoop]: Abstraction has 3395 states and 5770 transitions. [2022-11-03 02:39:27,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:39:27,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5770 transitions. [2022-11-03 02:39:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:39:27,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:27,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:39:27,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:39:27,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:27,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1371281817, now seen corresponding path program 1 times [2022-11-03 02:39:27,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:27,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466388408] [2022-11-03 02:39:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:27,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:27,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:27,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466388408] [2022-11-03 02:39:27,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:39:27,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169504260] [2022-11-03 02:39:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:27,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:27,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:39:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 6550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:39:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:29,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:29,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169504260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:29,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:29,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:39:29,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835084826] [2022-11-03 02:39:29,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:29,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:29,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:29,340 INFO L87 Difference]: Start difference. First operand 3395 states and 5770 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:30,443 INFO L93 Difference]: Finished difference Result 10166 states and 17282 transitions. [2022-11-03 02:39:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:30,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-11-03 02:39:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:30,493 INFO L225 Difference]: With dead ends: 10166 [2022-11-03 02:39:30,494 INFO L226 Difference]: Without dead ends: 6772 [2022-11-03 02:39:30,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 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 02:39:30,515 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 1442 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:30,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 2858 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:39:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2022-11-03 02:39:30,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6759. [2022-11-03 02:39:31,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 5200 states have (on average 1.6730769230769231) internal successors, (8700), 5205 states have internal predecessors, (8700), 1398 states have call successors, (1398), 161 states have call predecessors, (1398), 160 states have return successors, (1392), 1392 states have call predecessors, (1392), 1392 states have call successors, (1392) [2022-11-03 02:39:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 11490 transitions. [2022-11-03 02:39:31,065 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 11490 transitions. Word has length 34 [2022-11-03 02:39:31,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:31,065 INFO L495 AbstractCegarLoop]: Abstraction has 6759 states and 11490 transitions. [2022-11-03 02:39:31,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 11490 transitions. [2022-11-03 02:39:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:39:31,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:31,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 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 02:39:31,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:31,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-03 02:39:31,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash 897913431, now seen corresponding path program 1 times [2022-11-03 02:39:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088105814] [2022-11-03 02:39:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:31,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088105814] [2022-11-03 02:39:31,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:39:31,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865439865] [2022-11-03 02:39:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:31,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:31,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:31,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:31,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:39:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 6540 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:39:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:33,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:33,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865439865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:33,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:33,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:39:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013367337] [2022-11-03 02:39:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:33,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:33,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:33,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:33,741 INFO L87 Difference]: Start difference. First operand 6759 states and 11490 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:36,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-03 02:39:36,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:36,973 INFO L93 Difference]: Finished difference Result 20162 states and 34662 transitions. [2022-11-03 02:39:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:36,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-03 02:39:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:37,087 INFO L225 Difference]: With dead ends: 20162 [2022-11-03 02:39:37,087 INFO L226 Difference]: Without dead ends: 13404 [2022-11-03 02:39:37,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 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 02:39:37,128 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 1430 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 2869 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:37,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 2869 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-03 02:39:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2022-11-03 02:39:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 13391. [2022-11-03 02:39:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13391 states, 10344 states have (on average 1.6747873163186389) internal successors, (17324), 10349 states have internal predecessors, (17324), 2726 states have call successors, (2726), 321 states have call predecessors, (2726), 320 states have return successors, (3092), 2720 states have call predecessors, (3092), 2720 states have call successors, (3092) [2022-11-03 02:39:38,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13391 states to 13391 states and 23142 transitions. [2022-11-03 02:39:38,059 INFO L78 Accepts]: Start accepts. Automaton has 13391 states and 23142 transitions. Word has length 29 [2022-11-03 02:39:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:38,059 INFO L495 AbstractCegarLoop]: Abstraction has 13391 states and 23142 transitions. [2022-11-03 02:39:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 13391 states and 23142 transitions. [2022-11-03 02:39:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:39:38,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:38,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:39:38,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:38,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:38,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1705598365, now seen corresponding path program 1 times [2022-11-03 02:39:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:38,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316070565] [2022-11-03 02:39:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:38,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316070565] [2022-11-03 02:39:38,594 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:39:38,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128047434] [2022-11-03 02:39:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:38,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:38,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:38,595 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:38,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:39:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 6552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:39:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:40,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:40,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128047434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:40,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:40,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:39:40,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195753724] [2022-11-03 02:39:40,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:40,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:40,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:40,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:40,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:40,571 INFO L87 Difference]: Start difference. First operand 13391 states and 23142 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:42,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:42,866 INFO L93 Difference]: Finished difference Result 40106 states and 69318 transitions. [2022-11-03 02:39:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:42,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-03 02:39:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:43,025 INFO L225 Difference]: With dead ends: 40106 [2022-11-03 02:39:43,025 INFO L226 Difference]: Without dead ends: 26716 [2022-11-03 02:39:43,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 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 02:39:43,103 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 1441 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 2875 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 2875 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:39:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26716 states. [2022-11-03 02:39:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26716 to 26703. [2022-11-03 02:39:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26703 states, 20648 states have (on average 1.6743510267338242) internal successors, (34572), 20653 states have internal predecessors, (34572), 5414 states have call successors, (5414), 641 states have call predecessors, (5414), 640 states have return successors, (6144), 5408 states have call predecessors, (6144), 5408 states have call successors, (6144) [2022-11-03 02:39:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26703 states to 26703 states and 46130 transitions. [2022-11-03 02:39:45,020 INFO L78 Accepts]: Start accepts. Automaton has 26703 states and 46130 transitions. Word has length 35 [2022-11-03 02:39:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:45,020 INFO L495 AbstractCegarLoop]: Abstraction has 26703 states and 46130 transitions. [2022-11-03 02:39:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 26703 states and 46130 transitions. [2022-11-03 02:39:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:39:45,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:45,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 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 02:39:45,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-03 02:39:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:45,251 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1993390792, now seen corresponding path program 1 times [2022-11-03 02:39:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:45,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832822575] [2022-11-03 02:39:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:45,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:45,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832822575] [2022-11-03 02:39:45,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:39:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007354341] [2022-11-03 02:39:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:45,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:45,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:45,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:39:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 6542 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:39:47,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:47,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:47,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007354341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:47,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:47,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:39:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419092086] [2022-11-03 02:39:47,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:47,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:47,501 INFO L87 Difference]: Start difference. First operand 26703 states and 46130 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:50,512 INFO L93 Difference]: Finished difference Result 79978 states and 138178 transitions. [2022-11-03 02:39:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:39:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-03 02:39:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:51,002 INFO L225 Difference]: With dead ends: 79978 [2022-11-03 02:39:51,002 INFO L226 Difference]: Without dead ends: 53276 [2022-11-03 02:39:51,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 02:39:51,097 INFO L413 NwaCegarLoop]: 1547 mSDtfsCounter, 1446 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:51,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 2881 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:39:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53276 states. [2022-11-03 02:39:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53276 to 53263. [2022-11-03 02:39:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53263 states, 41224 states have (on average 1.6738792936153697) internal successors, (69004), 41229 states have internal predecessors, (69004), 10758 states have call successors, (10758), 1281 states have call predecessors, (10758), 1280 states have return successors, (12208), 10752 states have call predecessors, (12208), 10752 states have call successors, (12208) [2022-11-03 02:39:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53263 states to 53263 states and 91970 transitions. [2022-11-03 02:39:55,107 INFO L78 Accepts]: Start accepts. Automaton has 53263 states and 91970 transitions. Word has length 30 [2022-11-03 02:39:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:55,108 INFO L495 AbstractCegarLoop]: Abstraction has 53263 states and 91970 transitions. [2022-11-03 02:39:55,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:39:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 53263 states and 91970 transitions. [2022-11-03 02:39:55,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:39:55,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:55,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 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 02:39:55,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:39:55,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:55,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:55,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1496062884, now seen corresponding path program 1 times [2022-11-03 02:39:55,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:55,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612523669] [2022-11-03 02:39:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:55,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:39:55,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612523669] [2022-11-03 02:39:55,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:39:55,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237087502] [2022-11-03 02:39:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:55,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:55,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:55,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:39:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:39:57,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 6544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:39:57,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:39:57,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:39:57,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237087502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:39:57,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:39:57,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:39:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521868757] [2022-11-03 02:39:57,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:39:57,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:39:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:39:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:39:57,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:39:57,912 INFO L87 Difference]: Start difference. First operand 53263 states and 91970 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:40:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:01,228 INFO L93 Difference]: Finished difference Result 159530 states and 275490 transitions. [2022-11-03 02:40:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-03 02:40:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:02,143 INFO L225 Difference]: With dead ends: 159530 [2022-11-03 02:40:02,143 INFO L226 Difference]: Without dead ends: 106268 [2022-11-03 02:40:02,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 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 02:40:02,409 INFO L413 NwaCegarLoop]: 1553 mSDtfsCounter, 1445 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1445 SdHoareTripleChecker+Valid, 2887 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:02,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1445 Valid, 2887 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 02:40:02,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106268 states. [2022-11-03 02:40:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106268 to 106255. [2022-11-03 02:40:08,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106255 states, 82312 states have (on average 1.6733890562736904) internal successors, (137740), 82317 states have internal predecessors, (137740), 21382 states have call successors, (21382), 2561 states have call predecessors, (21382), 2560 states have return successors, (24256), 21376 states have call predecessors, (24256), 21376 states have call successors, (24256) [2022-11-03 02:40:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106255 states to 106255 states and 183378 transitions. [2022-11-03 02:40:08,862 INFO L78 Accepts]: Start accepts. Automaton has 106255 states and 183378 transitions. Word has length 31 [2022-11-03 02:40:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:08,865 INFO L495 AbstractCegarLoop]: Abstraction has 106255 states and 183378 transitions. [2022-11-03 02:40:08,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:40:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 106255 states and 183378 transitions. [2022-11-03 02:40:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:40:08,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:08,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 02:40:08,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:09,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:09,083 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1366270253, now seen corresponding path program 1 times [2022-11-03 02:40:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:09,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838272981] [2022-11-03 02:40:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:09,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838272981] [2022-11-03 02:40:09,381 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-03 02:40:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187564169] [2022-11-03 02:40:09,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:40:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:40:09,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:40:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:40:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 6538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:40:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:40:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:11,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:40:11,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187564169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:11,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:11,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:40:11,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368545075] [2022-11-03 02:40:11,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:11,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:11,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:11,393 INFO L87 Difference]: Start difference. First operand 106255 states and 183378 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:40:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:40:17,821 INFO L93 Difference]: Finished difference Result 318250 states and 549298 transitions. [2022-11-03 02:40:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:40:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-03 02:40:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:40:19,426 INFO L225 Difference]: With dead ends: 318250 [2022-11-03 02:40:19,426 INFO L226 Difference]: Without dead ends: 211996 [2022-11-03 02:40:19,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 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 02:40:19,762 INFO L413 NwaCegarLoop]: 1550 mSDtfsCounter, 1448 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1448 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:40:19,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1448 Valid, 2884 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:40:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211996 states. [2022-11-03 02:40:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211996 to 211983. [2022-11-03 02:40:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211983 states, 164360 states have (on average 1.6728887807252373) internal successors, (274956), 164365 states have internal predecessors, (274956), 42502 states have call successors, (42502), 5121 states have call predecessors, (42502), 5120 states have return successors, (48192), 42496 states have call predecessors, (48192), 42496 states have call successors, (48192) [2022-11-03 02:40:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211983 states to 211983 states and 365650 transitions. [2022-11-03 02:40:31,448 INFO L78 Accepts]: Start accepts. Automaton has 211983 states and 365650 transitions. Word has length 28 [2022-11-03 02:40:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:40:31,448 INFO L495 AbstractCegarLoop]: Abstraction has 211983 states and 365650 transitions. [2022-11-03 02:40:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-03 02:40:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 211983 states and 365650 transitions. [2022-11-03 02:40:31,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:40:31,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:40:31,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:40:31,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:40:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_14d35244-316b-4220-9c7c-c1227482ddce/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-03 02:40:31,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:40:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:40:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1768163544, now seen corresponding path program 1 times [2022-11-03 02:40:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:40:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986902417] [2022-11-03 02:40:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:40:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:40:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:40:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:40:32,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:40:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986902417] [2022-11-03 02:40:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986902417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:40:32,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:40:32,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:40:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211771024] [2022-11-03 02:40:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:40:32,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:40:32,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:40:32,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:40:32,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:40:32,151 INFO L87 Difference]: Start difference. First operand 211983 states and 365650 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)